/**
 * workshop.js — Taller / Service Orders for Nexus POS
 * Supports list + kanban views, filters, bitacora and role-based price hiding.
 */
var Workshop = (function() {
    'use strict';

    var API = '/pos/api/service-orders';
    var token = localStorage.getItem('pos_token');
    var orders = [];
    var catalog = [];
    var customers = [];
    var vehicles = [];
    var employees = [];
    var couriers = [];
    var branches = [];
    var currentOrderId = null;
    var currentOrder = null;
    var selectedInventoryItem = null;
    var itemSearchTimer = null;
    var customerSearchTimer = null;
    var selectedEditCustomer = null;
    var vehicleSearchTimer = null;
    var selectedEditVehicle = null;
    var newVehicleContext = null;
    var newCustomerContext = null;
    var currentView = 'list';
    var currentPage = 1;
    var perPage = 25;

    var user = window.POS_USER || {};
    var role = (user.role || '').toLowerCase();
    var isRestricted = role === 'workshop' || role === 'mechanic';
    var isMechanic = role === 'mechanic';
    var hidePrices = isRestricted;
    var perms = user.permissions || [];
    // Owner/admin/counter/cashier can create/edit/delete service orders.
    // Mechanics have limited access: view allowed statuses, change status, edit diagnosis/repair notes.
    var canEdit = role === 'owner' || role === 'admin' || role === 'counter' || role === 'cashier';
    var canCreate = canEdit;
    var canDelete = role === 'owner' || role === 'admin';
    var canSell = role === 'owner' || role === 'admin' || role === 'counter' || role === 'cashier' || perms.indexOf('pos.sell') !== -1;
    var canChangeStatus = canEdit || isMechanic;

    var COLUMNS = [
        {key: 'por_revisar', label: 'Por revisar'},
        {key: 'en_revision', label: 'En revisión'},
        {key: 'revisada', label: 'Revisada'},
        {key: 'cotizada', label: 'Cotizada'},
        {key: 'por_autorizar', label: 'Por autorizar'},
        {key: 'autorizada', label: 'Autorizada'},
        {key: 'autorizacion_parcial', label: 'Autorización parcial'},
        {key: 'en_reparacion', label: 'En reparación'},
        {key: 'reparada', label: 'Reparada'},
        {key: 'por_entregar', label: 'Por entregar'},
        {key: 'entregado', label: 'Entregado'},
        {key: 'por_enviar', label: 'Por enviar'},
        {key: 'enviado', label: 'Enviado'},
        {key: 'por_facturar', label: 'Por facturar'},
        {key: 'facturada', label: 'Facturada'},
        {key: 'por_recolectar', label: 'Por recolectar'},
    ];

    var STATUS_LABELS = {
        por_revisar: 'Por revisar',
        en_revision: 'En revisión',
        revisada: 'Revisada',
        cotizada: 'Cotizada',
        por_autorizar: 'Por autorizar',
        autorizada: 'Autorizada',
        autorizacion_parcial: 'Autorización parcial',
        en_reparacion: 'En reparación',
        reparada: 'Reparada',
        por_entregar: 'Por entregar',
        entregado: 'Entregado',
        por_enviar: 'Por enviar',
        enviado: 'Enviado',
        por_facturar: 'Por facturar',
        facturada: 'Facturada',
        por_recolectar: 'Por recolectar',
        cancelada: 'Cancelada'
    };

    var VALID_NEXT = {
        por_revisar: ['en_revision', 'cancelada'],
        en_revision: ['revisada', 'por_revisar', 'cancelada'],
        revisada: ['cotizada', 'en_revision', 'cancelada'],
        cotizada: ['por_autorizar', 'revisada', 'cancelada'],
        por_autorizar: ['autorizada', 'autorizacion_parcial', 'cotizada', 'cancelada'],
        autorizada: ['en_reparacion', 'por_autorizar', 'cancelada'],
        autorizacion_parcial: ['en_reparacion', 'por_autorizar', 'cancelada'],
        en_reparacion: ['reparada', 'por_autorizar', 'cancelada'],
        reparada: ['por_entregar', 'en_reparacion', 'cancelada'],
        por_entregar: ['entregado', 'por_enviar', 'reparada', 'cancelada'],
        por_enviar: ['enviado', 'por_entregar', 'cancelada'],
        enviado: ['entregado', 'por_enviar', 'cancelada'],
        por_recolectar: ['por_revisar', 'cancelada'],
        por_facturar: ['facturada', 'cancelada'],
        entregado: ['por_facturar'],
        facturada: [],
        cancelada: []
    };

    var DELIVERY_LABELS = {
        pickup: 'Mostrador',
        delivery: 'Envío a domicilio',
        courier: 'Motociclista'
    };

    var ITEM_STATUS_LABELS = {
        por_revisar: 'Por revisar',
        revisando: 'Revisando',
        revisado: 'Revisado',
        cotizado: 'Cotizado',
        por_autorizar: 'Por autorizar',
        autorizado: 'Autorizado',
        en_reparacion: 'En reparación',
        reparado: 'Reparado',
        por_entregar: 'Por entregar',
        entregado: 'Entregado',
        por_enviar: 'Por enviar',
        enviado: 'Enviado',
        cancelado: 'Cancelado'
    };

    function headers() {
        return {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + token
        };
    }

    function fmt(n) {
        if (n == null) return '0';
        return parseFloat(n).toLocaleString('es-MX');
    }

    function fmtMoney(n) {
        if (n == null) return '$0.00';
        return '$' + parseFloat(n).toLocaleString('es-MX', {minimumFractionDigits: 2, maximumFractionDigits: 2});
    }

    // Price based on customer tier: base price (price_1) with tier discount.
    // Tier 2 = Taller (5% off), Tier 3 = Mayoreo (10% off), Tier 1 = base.
    function priceForTier(basePrice, tier) {
        var p = parseFloat(basePrice) || 0;
        var t = parseInt(tier, 10) || 1;
        if (t === 2) return Math.round(p * 0.95 * 100) / 100;
        if (t === 3) return Math.round(p * 0.90 * 100) / 100;
        return p;
    }

    function fmtDate(d) {
        if (!d) return '—';
        var dt = new Date(d);
        if (isNaN(dt.getTime())) return d;
        return dt.toLocaleDateString('es-MX', {day: '2-digit', month: '2-digit', year: 'numeric'}) + ' ' +
               dt.toLocaleTimeString('es-MX', {hour: '2-digit', minute: '2-digit', hour12: false});
    }

    function esc(s) {
        if (s == null) return '';
        var el = document.createElement('div');
        el.textContent = s;
        return el.innerHTML;
    }

    function escJs(s) {
        if (s == null) return '';
        return String(s).replace(/\\/g, '\\\\').replace(/'/g, "\\'").replace(/"/g, '\\"');
    }

    function api(method, url, body) {
        var opts = {method: method, headers: headers()};
        if (body) opts.body = JSON.stringify(body);
        return fetch(API + url, opts).then(function(r) {
            return r.json().then(function(data) {
                if (!r.ok) throw new Error(data.error || r.statusText);
                return data;
            });
        });
    }

    // ─── Init ───

    function init() {
        var savedView = localStorage.getItem('workshop_view');
        if (savedView) currentView = savedView;
        bindFilters();
        bindDeliverySelect();
        if (!canCreate) {
            var btnNewOrder = document.getElementById('btnNewOrder');
            if (btnNewOrder) btnNewOrder.style.display = 'none';
        }
        if (isRestricted) {
            document.querySelectorAll('.restricted-hide').forEach(function(el) { el.style.display = 'none'; });
            var searchInput = document.getElementById('filterSearch');
            if (searchInput) searchInput.placeholder = 'Buscar orden';
            // Limit status filter to the only status taller accounts can see.
            var statusSel = document.getElementById('filterStatus');
            if (statusSel) {
                Array.from(statusSel.options).forEach(function(opt) {
                    if (opt.value && opt.value !== 'autorizada') opt.remove();
                });
                statusSel.value = 'autorizada';
            }
        }
        if (hidePrices) {
            var btnCatalog = document.getElementById('btnCatalog');
            if (btnCatalog) btnCatalog.style.display = 'none';
            document.querySelectorAll('.price-col').forEach(function(el) { el.style.display = 'none'; });
        }
        loadReferenceData();
        loadSummary();
        setView(currentView);
        loadOrders();
        loadCatalog();
    }

    function bindFilters() {
        ['filterBranch','filterStatus','filterDelivery','filterDirect','filterSearch'].forEach(function(id) {
            var el = document.getElementById(id);
            if (!el) return;
            el.addEventListener('change', function() { currentPage = 1; loadOrders(); });
            if (el.tagName === 'INPUT' && id === 'filterSearch') {
                el.addEventListener('keyup', debounce(function() { currentPage = 1; loadOrders(); }, 350));
            }
        });
    }

    function bindDeliverySelect() {
        var sel = document.getElementById('noDelivery');
        if (sel) {
            sel.addEventListener('change', function() {
                var cf = document.getElementById('courierField');
                if (cf) cf.style.display = (sel.value === 'delivery' || sel.value === 'courier') ? 'block' : 'none';
            });
        }
        var eoSel = document.getElementById('eoDelivery');
        if (eoSel) {
            eoSel.addEventListener('change', function() {
                var cf = document.getElementById('eoCourierField');
                if (cf) cf.style.display = (eoSel.value === 'delivery' || eoSel.value === 'courier') ? 'block' : 'none';
            });
        }
    }

    function debounce(fn, ms) {
        var t;
        return function() {
            clearTimeout(t);
            t = setTimeout(fn, ms);
        };
    }

    // ─── Summary ───

    function loadSummary() {
        fetch(API + '/kanban/summary', {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(d) {
                var cards = document.querySelectorAll('#statsRow .summary-card');
                if (isRestricted) {
                    // Taller accounts only see authorized orders.
                    cards.forEach(function(card, idx) {
                        if (idx === 0) {
                            card.style.display = '';
                            var label = card.querySelector('.summary-card__label');
                            if (label) label.textContent = 'Autorizadas';
                        } else {
                            card.style.display = 'none';
                        }
                    });
                    document.getElementById('statReceived').textContent = fmt(d.autorizada || 0);
                    return;
                }
                cards.forEach(function(card) { card.style.display = ''; });
                document.getElementById('statReceived').textContent = fmt(d.por_revisar || 0);
                document.getElementById('statRepair').textContent = fmt((d.en_reparacion || 0) + (d.en_revision || 0) + (d.revisada || 0) + (d.cotizada || 0) + (d.por_autorizar || 0));
                document.getElementById('statReady').textContent = fmt(d.por_entregar || 0);
                document.getElementById('statOverdue').textContent = fmt(d.overdue || 0);
            })
            .catch(function() {});
    }

    // ─── Orders loading ───

    function getFilterQuery() {
        var params = [];
        var status = document.getElementById('filterStatus').value;
        var delivery = document.getElementById('filterDelivery').value;
        var branch = document.getElementById('filterBranch').value;
        var direct = document.getElementById('filterDirect').checked;
        var q = document.getElementById('filterSearch').value.trim();
        if (status) params.push('status=' + encodeURIComponent(status));
        if (delivery) params.push('delivery_method=' + encodeURIComponent(delivery));
        if (branch) params.push('branch_id=' + encodeURIComponent(branch));
        if (direct) params.push('is_direct=true');
        if (q) params.push('q=' + encodeURIComponent(q));
        params.push('page=' + currentPage);
        params.push('per_page=' + perPage);
        return '?' + params.join('&');
    }

    function loadOrders() {
        fetch(API + getFilterQuery(), {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(d) {
                orders = d.data || [];
                var pagination = d.pagination || {};
                totalPages = pagination.total_pages || 1;
                if (currentView === 'list') {
                    renderList();
                    renderPagination();
                } else {
                    renderKanban();
                }
            })
            .catch(function(e) {
                console.error(e);
                document.getElementById('listBody').innerHTML = '<tr><td colspan="7" style="text-align:center;padding:var(--space-4);">Error cargando órdenes</td></tr>';
            });
    }

    var totalPages = 1;

    // ─── View switching ───

    function setView(view) {
        currentView = view;
        localStorage.setItem('workshop_view', view);
        document.querySelectorAll('.view-switch__btn').forEach(function(b) {
            b.classList.toggle('is-active', b.dataset.view === view);
        });
        document.getElementById('listView').style.display = view === 'list' ? 'block' : 'none';
        document.getElementById('kanbanBoard').style.display = view === 'kanban' ? 'flex' : 'none';
        if (view === 'list') {
            renderList();
            renderPagination();
        } else {
            renderKanban();
        }
    }

    // ─── List view ───

    function renderList() {
        var body = document.getElementById('listBody');
        var fullCols = 8;
        var restrictedCols = 4;
        var cols = isRestricted ? restrictedCols : fullCols;
        if (!orders.length) {
            body.innerHTML = '<tr><td colspan="' + cols + '" style="text-align:center;padding:var(--space-4);">No se encontraron órdenes</td></tr>';
            return;
        }
        body.innerHTML = orders.map(function(o) {
            var statusCell = '<td><span class="badge badge--' + esc(o.status) + '">' + esc(STATUS_LABELS[o.status] || o.status) + '</span></td>';
            var actionCell = '<td><button class="btn btn--sm btn--secondary" onclick="Workshop.openDetail(' + o.id + ')">Ver</button></td>';
            var base = '<td>' + esc(o.branch_name || '—') + '</td>' +
                '<td><strong>' + esc(o.order_number) + '</strong></td>' +
                statusCell +
                actionCell;
            if (isRestricted) {
                return '<tr>' + base + '</tr>';
            }
            var vehicle = esc(o.vehicle_description || (o.vehicle_plate ? (o.vehicle_plate + ' ' + (o.vehicle_make || '') + ' ' + (o.vehicle_model || '')).trim() : '—'));
            return '<tr>' +
                '<td>' + esc(o.branch_name || '—') + '</td>' +
                '<td><strong>' + esc(o.order_number) + '</strong></td>' +
                '<td>' + esc(o.customer_name || 'Cliente general') + '</td>' +
                '<td>' + esc(o.workshop_name || '—') + '</td>' +
                '<td>' + vehicle + '</td>' +
                statusCell +
                '<td class="price-col" style="text-align:right;">' + fmtMoney(o.total) + '</td>' +
                actionCell +
                '</tr>';
        }).join('');
        if (hidePrices) {
            document.querySelectorAll('.price-col').forEach(function(el) { el.style.display = 'none'; });
        }
    }

    function renderPagination() {
        var el = document.getElementById('listPagination');
        if (totalPages <= 1) {
            el.innerHTML = '';
            return;
        }
        var html = '<button class="btn btn--sm btn--ghost" ' + (currentPage === 1 ? 'disabled' : '') + ' onclick="Workshop.goPage(' + (currentPage - 1) + ')">Anterior</button>' +
            '<span class="pagination-info">Página ' + currentPage + ' de ' + totalPages + '</span>' +
            '<button class="btn btn--sm btn--ghost" ' + (currentPage === totalPages ? 'disabled' : '') + ' onclick="Workshop.goPage(' + (currentPage + 1) + ')">Siguiente</button>';
        el.innerHTML = html;
    }

    function goPage(p) {
        if (p < 1 || p > totalPages) return;
        currentPage = p;
        loadOrders();
    }

    // ─── Kanban view ───

    function renderKanban() {
        var board = document.getElementById('kanbanBoard');
        board.innerHTML = '';
        var hiddenCols = [];
        if (isRestricted) {
            // Taller accounts only see the "autorizada" column.
            hiddenCols = COLUMNS.filter(function(c) { return c.key !== 'autorizada'; }).map(function(c) { return c.key; });
        } else if (isMechanic) {
            hiddenCols = ['cotizada','por_autorizar','autorizada','autorizacion_parcial','por_facturar','facturada'];
        }
        COLUMNS.filter(function(col) { return hiddenCols.indexOf(col.key) === -1; }).forEach(function(col) {
            var colOrders = orders.filter(function(o) { return o.status === col.key; });
            var colEl = document.createElement('div');
            colEl.className = 'kanban-column';
            colEl.innerHTML =
                '<div class="kanban-column__header">' +
                '  <span>' + esc(col.label) + '</span>' +
                '  <span class="kanban-column__count">' + colOrders.length + '</span>' +
                '</div>' +
                '<div class="kanban-column__body" id="col-' + col.key + '"></div>';
            board.appendChild(colEl);

            var body = colEl.querySelector('.kanban-column__body');
            if (!colOrders.length) {
                body.innerHTML = '<div class="empty-state" style="padding:var(--space-4);"><div class="empty-state__subtitle">Sin órdenes</div></div>';
            } else {
                colOrders.forEach(function(o) { body.appendChild(renderCard(o)); });
            }
        });
    }

    function priorityLabel(p) {
        var map = {normal: 'Normal', high: 'Alta', urgent: 'Urgente'};
        return map[p] || p;
    }

    function statusBadgeClass(status) {
        return 'badge--' + (status || 'pending');
    }

    function renderCard(o) {
        var card = document.createElement('div');
        card.className = 'kanban-card';
        card.onclick = function() { openDetail(o.id); };
        var priceHtml = hidePrices ? '' : '<span>' + fmtMoney(o.estimated_cost || o.total) + '</span>';
        if (isRestricted) {
            card.innerHTML =
                '<div class="kanban-card__header">' +
                '  <span class="kanban-card__id">' + esc(o.order_number) + '</span>' +
                '  <span class="kanban-card__priority badge badge--' + esc(o.status) + '">' + esc(STATUS_LABELS[o.status] || o.status) + '</span>' +
                '</div>' +
                '<div class="kanban-card__branch">' + esc(o.branch_name || '—') + '</div>';
            return card;
        }
        card.innerHTML =
            '<div class="kanban-card__header">' +
            '  <span class="kanban-card__id">' + esc(o.order_number) + '</span>' +
            '  <span class="kanban-card__priority badge badge--' + esc(o.status) + '">' + esc(STATUS_LABELS[o.status] || o.status) + '</span>' +
            '</div>' +
            '<div class="kanban-card__customer">' + esc(o.customer_name || 'Cliente general') + '</div>' +
            '<div class="kanban-card__vehicle">' + esc(o.vehicle_description || o.vehicle_plate || 'Sin vehículo') + '</div>' +
            '<div class="kanban-card__meta">' +
            '  <span class="kanban-card__mechanic">🔧 ' + esc(o.employee_name || 'Sin asignar') + '</span>' +
            priceHtml +
            '</div>';
        return card;
    }

    // ─── Detail modal ───

    function openDetail(id) {
        currentOrderId = id;
        fetch(API + '/' + id, {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(o) {
                currentOrder = o;
                document.getElementById('detailTitle').textContent = 'Bitácora Orden: ' + esc(o.order_number);
                renderDetailBody(o);
                document.getElementById('detailModal').classList.add('is-open');
            })
            .catch(function(e) { alert('Error: ' + e.message); });
    }

    function renderDetailBody(o) {
        var activeTab = document.querySelector('.so-tabs__btn.is-active');
        var selectedTab = activeTab ? activeTab.dataset.tab : 'service';

        var mechanicAssignHtml = isMechanic ?
            '  <div class="so-detail-header__row"><span class="so-detail__label">Mecánico asignado:</span> ' +
            '<input id="mechanicNameInput" class="form-input" style="width:auto;min-width:180px;" value="' + esc(o.mechanic_name || '') + '" placeholder="Nombre del mecánico" />' +
            ' <button class="btn btn--sm btn--secondary" onclick="Workshop.saveMechanicName()">Guardar</button></div>' :
            '  <div class="so-detail-header__row"><span class="so-detail__label">Mecánico asignado:</span> ' + esc(o.mechanic_name || o.employee_name || 'Sin asignar') + '</div>';

        var html =
            '<div class="so-detail-header">' +
            '  <div class="so-detail-header__row"><span class="so-detail__label">Estatus:</span> <span class="badge badge--' + esc(o.status) + '">' + esc(STATUS_LABELS[o.status] || o.status) + '</span></div>' +
            '  <div class="so-detail-header__row"><span class="so-detail__label">Fecha:</span> ' + fmtDate(o.created_at) + '</div>' +
            '  <div class="so-detail-header__row"><span class="so-detail__label">Registrado por:</span> ' + esc(o.created_by_name || '—') + '</div>' +
            '  <div class="so-detail-header__row"><span class="so-detail__label">Sucursal:</span> ' + esc(o.branch_name || '—') + '</div>' +
            mechanicAssignHtml +
            '</div>' +

            (isRestricted ? '' :
            '<div class="so-detail-info">' +
            '  <div class="so-detail__field"><span class="so-detail__label">Cliente</span><span class="so-detail__value">' + esc(o.customer_name || '—') + '</span></div>' +
            '  <div class="so-detail__field"><span class="so-detail__label">Taller</span><span class="so-detail__value">' + esc(o.workshop_name || '—') + '</span></div>' +
            '  <div class="so-detail__field"><span class="so-detail__label">Dirección</span><span class="so-detail__value">' + esc(o.customer_address || '—') + '</span></div>' +
            '  <div class="so-detail__field"><span class="so-detail__label">Teléfono</span><span class="so-detail__value">' + esc(o.customer_phone || '—') + '</span></div>' +
            '  <div class="so-detail__field"><span class="so-detail__label">Vehículo</span><span class="so-detail__value">' + esc(o.vehicle_description || (o.vehicle_plate ? (o.vehicle_plate + ' ' + (o.vehicle_make || '') + ' ' + (o.vehicle_model || '')).trim() : '—')) + '</span></div>' +
            '  <div class="so-detail__field"><span class="so-detail__label">Vía de entrega</span><span class="so-detail__value">' + esc(DELIVERY_LABELS[o.delivery_method] || o.delivery_method || '—') + '</span></div>' +
            '  <div class="so-detail__field"><span class="so-detail__label">Motociclista</span><span class="so-detail__value">' + esc(o.courier_name || '—') + '</span></div>' +
            '  <div class="so-detail__field"><span class="so-detail__label">Factura</span><span class="so-detail__value">' + (o.requires_invoice ? 'Sí requiere' : 'No requiere') + '</span></div>' +
            '  <div class="so-detail__field"><span class="so-detail__label">Mecánico</span><span class="so-detail__value">' + esc(o.employee_name || 'Sin asignar') + '</span></div>' +
            (hidePrices ? '' : '<div class="so-detail__field"><span class="so-detail__label">Presupuesto</span><span class="so-detail__value">' + fmtMoney(o.estimated_cost) + '</span></div>') +
            (hidePrices ? '' : '<div class="so-detail__field"><span class="so-detail__label">Total</span><span class="so-detail__value">' + fmtMoney(o.total) + '</span></div>') +
            '</div>') +

            (isRestricted ? '' :
            '<div class="so-tabs">' +
            '  <button class="so-tabs__btn ' + (selectedTab === 'service' ? 'is-active' : '') + '" data-tab="service" onclick="Workshop.switchTab(\'service\')">Orden de servicio</button>' +
            '  <button class="so-tabs__btn ' + (selectedTab === 'articles' ? 'is-active' : '') + '" data-tab="articles" onclick="Workshop.switchTab(\'articles\')">Artículos</button>' +
            '</div>') +

            '<div class="so-tab-panel" id="tab-service" ' + (selectedTab === 'service' || isRestricted ? '' : 'style="display:none;"') + '>' +
            '  <div class="so-detail__section">' +
            '    <h3>Notas</h3>' +
            '    <div class="so-notes-grid">' +
            '      <label class="form-label">Recepción</label>' +
            '      <textarea id="noteReception" class="form-input" rows="2" ' + (canEdit ? '' : 'readonly') + '>' + esc(o.reception_notes || '') + '</textarea>' +
            '      <label class="form-label">Diagnóstico</label>' +
            '      <textarea id="noteDiagnosis" class="form-input" rows="2" ' + (canEdit || isMechanic ? '' : 'readonly') + '>' + esc(o.diagnosis_notes || '') + '</textarea>' +
            '      <label class="form-label">Reparación</label>' +
            '      <textarea id="noteRepair" class="form-input" rows="2" ' + (canEdit || isMechanic ? '' : 'readonly') + '>' + esc(o.repair_notes || '') + '</textarea>' +
            '      <label class="form-label">Entrega</label>' +
            '      <textarea id="noteDelivery" class="form-input" rows="2" ' + (canEdit ? '' : 'readonly') + '>' + esc(o.delivery_notes || '') + '</textarea>' +
            '    </div>' +
            (canEdit || isMechanic ? '    <button class="btn btn--secondary" style="margin-top:var(--space-2);" onclick="Workshop.saveNotes()">Guardar notas</button>' : '') +
            '  </div>' +
            '  <div class="so-detail__section">' +
            '    <h3>Bitácora</h3>' +
            renderBitacora(o.status_history || []) +
            '  </div>' +
            '</div>' +

            (isRestricted ? '' : '<div class="so-tab-panel" id="tab-articles" ' + (selectedTab === 'articles' ? '' : 'style="display:none;"') + '>' +
            renderArticles(o) +
            '</div>');

        document.getElementById('detailBody').innerHTML = html;

        // Footer actions
        var footer = document.getElementById('detailFooter');
        var allowedNext = (VALID_NEXT[o.status] || []).filter(function(s) {
            return !isMechanic || ['cotizada','por_autorizar','autorizada','autorizacion_parcial','por_facturar','facturada'].indexOf(s) === -1;
        });
        var statusHtml = canChangeStatus && allowedNext.length ?
            '<div class="so-detail__actions" style="margin-right:auto;">' +
            '  <select class="form-input" id="statusSelect" style="width:auto;">' +
            '<option value="' + esc(o.status) + '" selected>' + esc(STATUS_LABELS[o.status] || o.status) + '</option>' +
            allowedNext.map(function(s) { return '<option value="' + s + '">' + esc(STATUS_LABELS[s] || s) + '</option>'; }).join('') +
            '  </select>' +
            '  <button class="btn btn--primary" onclick="Workshop.changeStatus()">Actualizar estado</button>' +
            '</div>' : '';
        footer.innerHTML = statusHtml +
            '<button class="btn btn--ghost" onclick="Workshop.closeDetailModal()">Cerrar</button>' +
            (canEdit ? '<button class="btn btn--secondary" onclick="Workshop.openEditOrderModal()">Editar orden</button>' : '') +
            (canDelete ? '<button class="btn btn--danger" onclick="Workshop.deleteOrder()">Eliminar orden</button>' : '') +
            (isRestricted ? '' : '<button class="btn btn--secondary" onclick="Workshop.printOrder()">' +
            '<svg viewBox="0 0 24 24"><polyline points="6 9 6 2 18 2 18 9"/><path d="M6 18H4a2 2 0 0 1-2-2v-5a2 2 0 0 1 2-2h16a2 2 0 0 1 2 2v5a2 2 0 0 1-2 2h-2"/><rect x="6" y="14" width="12" height="8"/></svg>' +
            'Imprimir orden</button>') +
            (canEdit && canSell && (o.status === 'por_entregar' || o.status === 'entregado') && !o.sale_id ? '<button class="btn btn--primary" onclick="Workshop.convertToSale()">Convertir a venta</button>' : '') +
            (canEdit && canSell && !o.sale_id && o.status !== 'cancelled' ? '<button class="btn btn--secondary" onclick="Workshop.convertToRemission()">Generar nota de remisión</button>' : '') +
            (o.sale_id ? '<a class="btn btn--secondary" href="/pos/invoicing?sale_id=' + o.sale_id + '">Ver venta #' + o.sale_id + '</a>' : '');
    }

    function switchTab(tab) {
        document.querySelectorAll('.so-tabs__btn').forEach(function(b) { b.classList.toggle('is-active', b.dataset.tab === tab); });
        document.getElementById('tab-service').style.display = tab === 'service' ? 'block' : 'none';
        document.getElementById('tab-articles').style.display = tab === 'articles' ? 'block' : 'none';
    }

    function renderBitacora(history) {
        if (!history.length) return '<p style="color:var(--color-text-muted);">Sin movimientos</p>';
        var vehicle = currentOrder ? (currentOrder.vehicle_description || (currentOrder.vehicle_plate ? currentOrder.vehicle_plate + ' ' + (currentOrder.vehicle_make || '') + ' ' + (currentOrder.vehicle_model || '') : null)) : null;
        var rows = history.map(function(h) {
            return '<tr>' +
                '<td><span class="badge badge--' + esc(h.new_status) + '">' + esc(STATUS_LABELS[h.new_status] || h.new_status) + '</span></td>' +
                '<td>' + fmtDate(h.created_at) + '</td>' +
                '<td>' + esc(h.changed_by_name || '—') + '</td>' +
                (isMechanic && vehicle ? '<td>' + esc(vehicle) + '</td>' : '') +
                '<td>' + esc(h.notes || '—') + '</td>' +
                '</tr>';
        }).join('');
        var vehicleTh = isMechanic && vehicle ? '<th>Vehículo</th>' : '';
        return '<table class="data-table bitacora-table"><thead><tr><th>Estatus</th><th>Fecha</th><th>Usuario</th>' + vehicleTh + '<th>Observaciones</th></tr></thead><tbody>' + rows + '</tbody></table>';
    }

    function mechanicName(id) {
        var e = employees.find(function(x) { return x.id === id; });
        return e ? e.name : '—';
    }

    function ensureEmployees() {
        if (employees && employees.length) return Promise.resolve(employees);
        return fetch('/pos/api/config/employees?per_page=500', {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(d) {
                employees = (d.data || d.employees || []);
                return employees;
            })
            .catch(function() { employees = []; return employees; });
    }

    function populateMechanicSelect(selectId, selectedId) {
        var sel = document.getElementById(selectId);
        if (!sel) return;
        ensureEmployees().then(function() {
            sel.innerHTML = '<option value="">— Sin asignar —</option>' +
                employees
                    .filter(function(e) { return e.is_active && (e.role === 'mechanic' || e.role === 'workshop'); })
                    .map(function(e) {
                        return '<option value="' + e.id + '"' + (e.id === selectedId ? ' selected' : '') + '>' + esc(e.name) + '</option>';
                    }).join('');
        });
    }

    function renderArticles(o) {
        var colCount = (hidePrices ? 5 : 6) - (isRestricted ? 1 : 0);
        var partsRows = (o.items || []).map(function(it) {
            var priceCells = hidePrices ? '' : '<td>' + fmtMoney(it.unit_price) + '</td>';
            var mechanicCells = isRestricted ? '' : '<td>' + esc(mechanicName(it.mechanic_id)) + '</td>';
            var actionCell = canEdit && it.status !== 'cancelado' ?
                '<td><button class="btn btn--sm btn--secondary" onclick="event.stopPropagation();Workshop.editItemInline(' + it.id + ')">Editar</button></td>' : '<td></td>';
            return '<tr>' +
                '<td>' + esc(it.name) + '<br><small>' + esc(it.part_number || '') + '</small></td>' +
                '<td>' + fmt(it.quantity) + '</td>' +
                priceCells +
                mechanicCells +
                '<td><span class="badge ' + statusBadgeClass(it.status) + '">' + esc(ITEM_STATUS_LABELS[it.status] || it.status) + '</span></td>' +
                '<td>' + esc(it.observations || '') + '</td>' +
                actionCell +
                '</tr>';
        }).join('');
        var partsHeader = '<tr><th>Concepto</th><th>Cant.</th>' + (hidePrices ? '' : '<th>Precio</th>') + (isRestricted ? '' : '<th>Mecánico</th>') + '<th>Estado</th><th>Observaciones</th><th></th></tr>';

        var addParts = canEdit ?
            '<div style="margin-top:var(--space-3);display:flex;gap:var(--space-2);align-items:flex-start;flex-wrap:wrap;">' +
            '  <div style="position:relative;flex:1;min-width:160px;">' +
            '    <input class="form-input" id="newItemSearch" placeholder="Buscar refacción por nombre/número" autocomplete="off" oninput="Workshop.searchItemsForSO()" />' +
            '    <div id="itemSearchResults" style="display:none;position:absolute;z-index:10;top:100%;left:0;right:0;max-height:220px;overflow-y:auto;background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:0 4px 12px rgba(0,0,0,.15);"></div>' +
            '  </div>' +
            '  <input class="form-input" id="newItemQty" type="number" value="1" min="1" style="width:70px;" />' +
            (hidePrices ? '' : '<input class="form-input" id="newItemPrice" type="number" step="0.01" placeholder="Precio" style="width:90px;" />') +
            '  <select class="form-input" id="newItemMechanic" style="width:auto;"><option value="">— Mecánico —</option></select>' +
            '  <select class="form-input" id="newItemStatus" style="width:auto;">' +
            Object.keys(ITEM_STATUS_LABELS).map(function(s) { return '<option value="' + s + '">' + esc(ITEM_STATUS_LABELS[s]) + '</option>'; }).join('') +
            '  </select>' +
            '  <input class="form-input" id="newItemObs" placeholder="Observaciones" style="min-width:140px;flex:1;" />' +
            '  <button class="btn btn--secondary" onclick="Workshop.addSelectedItem()">Agregar</button>' +
            '</div>' : '';

        var html =
            '<div class="so-detail__section">' +
            '  <h3>Artículos</h3>' +
            '  <table class="data-table"><thead>' + partsHeader + '</thead><tbody>' + (partsRows || '<tr><td colspan="' + colCount + '" style="text-align:center;">Sin artículos</td></tr>') + '</tbody></table>' +
            addParts +
            '</div>';

        // populate mechanic select after DOM insertion
        setTimeout(function() {
            ensureEmployees().then(function() {
                var sel = document.getElementById('newItemMechanic');
                if (!sel || sel.dataset.populated) return;
                employees.forEach(function(e) {
                    if (!e.is_active) return;
                    var opt = document.createElement('option');
                    opt.value = e.id;
                    opt.textContent = e.name;
                    sel.appendChild(opt);
                });
                sel.dataset.populated = '1';
            });
        }, 0);

        return html;
    }

    function closeDetailModal() {
        document.getElementById('detailModal').classList.remove('is-open');
        currentOrderId = null;
        currentOrder = null;
    }

    function openEditOrderModal() {
        if (!currentOrder) return;
        populateEditOrderModal();
        document.getElementById('editOrderModal').classList.add('is-open');
    }

    function closeEditOrderModal() {
        document.getElementById('editOrderModal').classList.remove('is-open');
        selectedEditCustomer = null;
        selectedEditVehicle = null;
    }

    function toDatetimeLocal(d) {
        if (!d) return '';
        var date = new Date(d);
        date.setMinutes(date.getMinutes() - date.getTimezoneOffset());
        return date.toISOString().slice(0, 16);
    }

    async function populateEditOrderModal() {
        var o = currentOrder;
        selectedEditCustomer = o.customer_id ? {id: o.customer_id, name: o.customer_name || ''} : null;

        document.getElementById('eoCustomerSearch').value = selectedEditCustomer ? selectedEditCustomer.name : '';
        document.getElementById('eoCustomerId').value = selectedEditCustomer ? selectedEditCustomer.id : '';

        // Branches
        var branchSel = document.getElementById('eoBranch');
        branchSel.innerHTML = branches.map(function(b) {
            return '<option value="' + b.id + '"' + (b.id === o.branch_id ? ' selected' : '') + '>' + esc(b.name) + '</option>';
        }).join('');

        document.getElementById('eoWorkshopName').value = o.workshop_name || '';
        document.getElementById('eoCustomerAddress').value = o.customer_address || '';
        document.getElementById('eoCustomerPhone').value = o.customer_phone || '';
        document.getElementById('eoVehicleDescription').value = o.vehicle_description || '';

        // Delivery / courier
        var deliverySel = document.getElementById('eoDelivery');
        deliverySel.value = o.delivery_method || '';
        var courierField = document.getElementById('eoCourierField');
        var courierSel = document.getElementById('eoCourier');
        courierSel.innerHTML = couriers.map(function(c) {
            return '<option value="' + c.id + '"' + (c.id === o.courier_id ? ' selected' : '') + '>' + esc(c.name) + '</option>';
        }).join('');
        courierField.style.display = (o.delivery_method === 'delivery' || o.delivery_method === 'courier') ? 'block' : 'none';

        document.getElementById('eoEstimatedCost').value = o.estimated_cost != null ? o.estimated_cost : '';
        populateMechanicSelect('eoMechanic', o.employee_id || null);
        document.getElementById('eoMechanicName').value = o.mechanic_name || '';
        document.getElementById('eoNotes').value = o.reception_notes || '';
        document.getElementById('eoRequiresInvoice').checked = !!o.requires_invoice;
    }

    function hideEditSearchResults(type) {
        var box = document.getElementById(type === 'customer' ? 'eoCustomerResults' : 'eoVehicleResults');
        if (box) box.style.display = 'none';
    }

    function searchCustomersForSO() {
        var input = document.getElementById('eoCustomerSearch');
        var box = document.getElementById('eoCustomerResults');
        var q = input.value.trim();
        selectedEditCustomer = null;
        document.getElementById('eoCustomerId').value = '';
        if (!q || q.length < 2) {
            box.style.display = 'none'; box.innerHTML = '';
            return;
        }
        clearTimeout(customerSearchTimer);
        customerSearchTimer = setTimeout(function() {
            fetch('/pos/api/customers?q=' + encodeURIComponent(q) + '&per_page=20', {headers: headers()})
                .then(function(r) { return r.json(); })
                .then(function(d) {
                    var items = d.data || [];
                    if (!items.length) {
                        box.innerHTML = '<div style="padding:var(--space-2);color:var(--color-text-muted);">Sin resultados</div>';
                        box.style.display = 'block'; return;
                    }
                    box.innerHTML = items.map(function(c) {
                        return '<div class="so-search-result" style="padding:var(--space-2);cursor:pointer;border-bottom:1px solid var(--color-border);" onclick="Workshop.selectEditCustomer(' + c.id + ', \'' + escJs(c.name) + '\')">' +
                            '<strong>' + esc(c.name) + '</strong>' +
                            '<small>' + esc(c.phone || '') + ' · ' + esc(c.rfc || '') + '</small>' +
                            '</div>';
                    }).join('');
                    box.style.display = 'block';
                })
                .catch(function() { box.style.display = 'none'; });
        }, 250);
    }

    function selectEditCustomer(id, name) {
        selectedEditCustomer = {id: id, name: name};
        document.getElementById('eoCustomerSearch').value = name;
        document.getElementById('eoCustomerId').value = id;
        hideEditSearchResults('customer');
    }

    function searchVehiclesForSO() {
        // Fleet module removed; vehicle is free-text in the taller flow.
        var box = document.getElementById('eoVehicleResults');
        if (box) { box.style.display = 'none'; box.innerHTML = ''; }
    }

    function selectEditVehicle(id, label) {
        selectedEditVehicle = {id: id, label: label};
        document.getElementById('eoVehicleSearch').value = label;
        document.getElementById('eoVehicleId').value = id;
        hideEditSearchResults('vehicle');
    }

    async function saveOrderChanges() {
        if (!currentOrderId) return;
        var customerId = selectedEditCustomer ? selectedEditCustomer.id : parseInt(document.getElementById('eoCustomerId').value, 10) || null;
        var delivery = document.getElementById('eoDelivery').value;
        var mechanicVal = document.getElementById('eoMechanic').value;
        var payload = {
            customer_id: customerId,
            branch_id: parseInt(document.getElementById('eoBranch').value, 10) || null,
            workshop_name: document.getElementById('eoWorkshopName').value.trim() || null,
            customer_address: document.getElementById('eoCustomerAddress').value.trim() || null,
            customer_phone: document.getElementById('eoCustomerPhone').value.trim() || null,
            vehicle_description: document.getElementById('eoVehicleDescription').value.trim() || null,
            delivery_method: delivery || null,
            courier_id: (delivery === 'delivery' || delivery === 'courier') ? (parseInt(document.getElementById('eoCourier').value, 10) || null) : null,
            estimated_cost: document.getElementById('eoEstimatedCost').value ? parseFloat(document.getElementById('eoEstimatedCost').value) : null,
            employee_id: mechanicVal ? parseInt(mechanicVal, 10) : null,
            mechanic_name: document.getElementById('eoMechanicName').value.trim() || null,
            reception_notes: document.getElementById('eoNotes').value,
            requires_invoice: document.getElementById('eoRequiresInvoice').checked
        };
        try {
            await api('PUT', '/' + currentOrderId, payload);
            toast('Orden actualizada');
            closeEditOrderModal();
            closeDetailModal();
            loadSummary();
            loadOrders();
        } catch (e) {
            alert('Error: ' + e.message);
        }
    }

    function openNewVehicleModal(context) {
        newVehicleContext = context || 'edit';
        var customerId = null;
        var customerName = '';
        if (newVehicleContext === 'new') {
            var sel = document.getElementById('noCustomer');
            customerId = sel ? parseInt(sel.value, 10) || null : null;
            customerName = sel && sel.selectedIndex >= 0 ? sel.options[sel.selectedIndex].text : '';
        } else {
            customerId = currentOrder ? currentOrder.customer_id : null;
            customerName = currentOrder ? (currentOrder.customer_name || '') : '';
        }
        if (!customerId) {
            alert('Primero selecciona un cliente para poder crear el vehículo.');
            return;
        }
        document.getElementById('nvCustomerId').value = customerId;
        document.getElementById('nvCustomerName').value = customerName;
        document.getElementById('newVehicleModal').classList.add('is-open');
        document.getElementById('nvPlate').value = '';
        document.getElementById('nvMake').value = '';
        document.getElementById('nvModel').value = '';
        document.getElementById('nvYear').value = '';
        document.getElementById('nvColor').value = '';
    }

    function openNewVehicleModalFromNewOrder() {
        openNewVehicleModal('new');
    }

    function closeNewVehicleModal() {
        document.getElementById('newVehicleModal').classList.remove('is-open');
    }

    async function saveNewVehicle() {
        var plate = document.getElementById('nvPlate').value.trim();
        var make = document.getElementById('nvMake').value.trim();
        var model = document.getElementById('nvModel').value.trim();
        var customerId = parseInt(document.getElementById('nvCustomerId').value, 10) || null;
        if (!make || !model) {
            alert('Marca y modelo son obligatorios');
            return;
        }
        if (!customerId) {
            alert('El vehículo debe estar asignado a un cliente');
            return;
        }
        var payload = {
            plate: plate,
            customer_id: customerId,
            make: make,
            model: model,
            year: document.getElementById('nvYear').value ? parseInt(document.getElementById('nvYear').value, 10) : null,
            color: document.getElementById('nvColor').value.trim() || null,
            branch_id: (currentOrder ? currentOrder.branch_id : null) || (window.POS_USER ? window.POS_USER.branch_id : null)
        };
        try {
            var res = await api('POST', '/vehicles', payload);
            var label = [payload.make, payload.model, payload.year, plate].filter(Boolean).join(' · ');
            if (newVehicleContext === 'new') {
                var sel = document.getElementById('noVehicle');
                var opt = document.createElement('option');
                opt.value = res.id;
                opt.textContent = label.trim();
                sel.appendChild(opt);
                sel.value = res.id;
                // also add to cached vehicles array if present
                if (typeof vehicles !== 'undefined') {
                    vehicles.push({id: res.id, plate: plate, vin: vin, make: payload.make, model: payload.model, year: payload.year, color: payload.color, owner_name: payload.owner_name});
                }
            } else {
                selectedEditVehicle = {id: res.id, label: label.trim()};
                document.getElementById('eoVehicleSearch').value = selectedEditVehicle.label;
                document.getElementById('eoVehicleId').value = res.id;
            }
            toast('Vehículo creado');
            closeNewVehicleModal();
        } catch (e) {
            alert('Error: ' + e.message);
        }
    }

    function openNewCustomerModal(context) {
        newCustomerContext = context || 'new';
        document.getElementById('newCustomerModal').classList.add('is-open');
        document.getElementById('ncName').value = '';
        document.getElementById('ncPhone').value = '';
        document.getElementById('ncEmail').value = '';
        document.getElementById('ncRfc').value = '';
        document.getElementById('ncPriceTier').value = '1';
        document.getElementById('ncAddress').value = '';
    }

    function openNewCustomerModalFromNewOrder() {
        openNewCustomerModal('new');
    }

    function closeNewCustomerModal() {
        document.getElementById('newCustomerModal').classList.remove('is-open');
    }

    async function saveNewCustomer() {
        var name = document.getElementById('ncName').value.trim();
        if (!name) {
            alert('El nombre es obligatorio');
            return;
        }
        var payload = {
            name: name,
            phone: document.getElementById('ncPhone').value.trim() || null,
            email: document.getElementById('ncEmail').value.trim() || null,
            rfc: document.getElementById('ncRfc').value.trim() || null,
            price_tier: parseInt(document.getElementById('ncPriceTier').value, 10) || 1,
            address: document.getElementById('ncAddress').value.trim() || null,
            branch_id: (currentOrder ? currentOrder.branch_id : null) || (window.POS_USER ? window.POS_USER.branch_id : null)
        };
        try {
            var res = await api('POST', '/customers', payload);
            var label = name + (payload.phone ? ' (' + payload.phone + ')' : '');
            if (newCustomerContext === 'new') {
                var sel = document.getElementById('noCustomer');
                var opt = document.createElement('option');
                opt.value = res.id;
                opt.textContent = label.trim();
                sel.appendChild(opt);
                sel.value = res.id;
                document.getElementById('noWorkshopName').value = name;
                document.getElementById('noCustomerPhone').value = payload.phone || '';
                document.getElementById('noCustomerAddress').value = payload.address || '';
                if (typeof customers !== 'undefined') {
                    customers.push({id: res.id, name: name, phone: payload.phone, rfc: payload.rfc, address: payload.address});
                }
            } else {
                selectedEditCustomer = {id: res.id, name: name};
                document.getElementById('eoCustomerSearch').value = name;
                document.getElementById('eoCustomerId').value = res.id;
            }
            toast('Cliente creado');
            closeNewCustomerModal();
        } catch (e) {
            alert('Error: ' + e.message);
        }
    }

    // ─── Actions ───

    function changeStatus() {
        if (!currentOrderId) return;
        var newStatus = document.getElementById('statusSelect').value;
        if (currentOrder && newStatus === currentOrder.status) {
            alert('Selecciona un estado diferente al actual');
            return;
        }
        api('PUT', '/' + currentOrderId + '/status', {status: newStatus})
            .then(function() {
                closeDetailModal();
                loadSummary();
                loadOrders();
            })
            .catch(function(e) { alert('Error: ' + e.message); });
    }

    function saveNotes() {
        if (!currentOrderId) return;
        var payload;
        if (isMechanic) {
            payload = {
                diagnosis_notes: document.getElementById('noteDiagnosis').value,
                repair_notes: document.getElementById('noteRepair').value
            };
        } else {
            payload = {
                reception_notes: document.getElementById('noteReception').value,
                diagnosis_notes: document.getElementById('noteDiagnosis').value,
                repair_notes: document.getElementById('noteRepair').value,
                delivery_notes: document.getElementById('noteDelivery').value
            };
        }
        api('PUT', '/' + currentOrderId, payload)
            .then(function() {
                alert('Notas guardadas');
                if (currentOrder) {
                    if ('reception_notes' in payload) currentOrder.reception_notes = payload.reception_notes;
                    if ('diagnosis_notes' in payload) currentOrder.diagnosis_notes = payload.diagnosis_notes;
                    if ('repair_notes' in payload) currentOrder.repair_notes = payload.repair_notes;
                    if ('delivery_notes' in payload) currentOrder.delivery_notes = payload.delivery_notes;
                }
            })
            .catch(function(e) { alert('Error: ' + e.message); });
    }

    function saveMechanicName() {
        if (!currentOrderId) return;
        var input = document.getElementById('mechanicNameInput');
        if (!input) return;
        var payload = { mechanic_name: input.value.trim() || null };
        api('PUT', '/' + currentOrderId, payload)
            .then(function() {
                alert('Mecánico asignado guardado');
                if (currentOrder) currentOrder.mechanic_name = payload.mechanic_name;
            })
            .catch(function(e) { alert('Error: ' + e.message); });
    }

    function reserveItem(itemId) {
        api('POST', '/' + currentOrderId + '/items/' + itemId + '/reserve', {})
            .then(function() {
                alert('Refacción reservada');
                openDetail(currentOrderId);
                loadSummary();
            })
            .catch(function(e) { alert('Error: ' + e.message); });
    }

    function hideItemSearchResults() {
        var box = document.getElementById('itemSearchResults');
        if (box) box.style.display = 'none';
    }

    function searchItemsForSO() {
        var input = document.getElementById('newItemSearch');
        var box = document.getElementById('itemSearchResults');
        var q = input.value.trim();
        selectedInventoryItem = null;
        if (!q || q.length < 2) {
            box.style.display = 'none';
            box.innerHTML = '';
            return;
        }
        clearTimeout(itemSearchTimer);
        itemSearchTimer = setTimeout(function() {
            var branchId = currentOrder && currentOrder.branch_id ? currentOrder.branch_id : '';
            fetch('/pos/api/service-orders/inventory-search?q=' + encodeURIComponent(q) + '&branch_id=' + encodeURIComponent(branchId), {headers: headers()})
                .then(function(r) { return r.json(); })
                .then(function(d) {
                    var items = d.data || [];
                    if (!items.length) {
                        box.innerHTML = '<div style="padding:var(--space-2);color:var(--color-text-muted);">Sin resultados</div>';
                        box.style.display = 'block';
                        return;
                    }
                    var orderTier = currentOrder ? (currentOrder.customer_price_tier || 1) : 1;
                    box.innerHTML = items.map(function(it) {
                        var price = priceForTier(it.price_1, orderTier);
                        return '<div class="so-search-result" data-id="' + it.id + '" data-name="' + esc(it.name) + '" data-part="' + esc(it.part_number || '') + '" data-price="' + price + '" data-cost="' + (it.cost || 0) + '" style="padding:var(--space-2);cursor:pointer;border-bottom:1px solid var(--color-border);" onclick="Workshop.selectInventoryItem(' + it.id + ')">' +
                            '<div><strong>' + esc(it.name) + '</strong></div>' +
                            '<small>' + esc(it.part_number || '') + ' · ' + esc(it.brand || '') + ' · Stock: ' + fmt(it.stock) + (hidePrices ? '' : ' · ' + fmtMoney(price)) + '</small>' +
                            '</div>';
                    }).join('');
                    box.style.display = 'block';
                })
                .catch(function() {
                    box.style.display = 'none';
                });
        }, 250);
    }

    function selectInventoryItem(id) {
        var box = document.getElementById('itemSearchResults');
        var div = box.querySelector('[data-id="' + id + '"]');
        if (!div) return;
        selectedInventoryItem = {
            id: id,
            name: div.dataset.name || '',
            part_number: div.dataset.part || '',
            unit_price: parseFloat(div.dataset.price) || 0,
            unit_cost: parseFloat(div.dataset.cost) || 0
        };
        document.getElementById('newItemSearch').value = selectedInventoryItem.name;
        box.style.display = 'none';
    }

    function addSelectedItem() {
        if (!currentOrderId) return;
        var qty = parseFloat(document.getElementById('newItemQty').value) || 1;
        var status = document.getElementById('newItemStatus').value || 'por_revisar';
        var mechanicId = parseInt(document.getElementById('newItemMechanic').value, 10) || null;
        var observations = document.getElementById('newItemObs').value.trim();
        if (selectedInventoryItem) {
            var price = hidePrices ? selectedInventoryItem.unit_price : (parseFloat(document.getElementById('newItemPrice').value) || selectedInventoryItem.unit_price || 0);
            api('POST', '/' + currentOrderId + '/items', {
                inventory_id: selectedInventoryItem.id,
                part_number: selectedInventoryItem.part_number,
                name: selectedInventoryItem.name,
                quantity: qty,
                unit_cost: selectedInventoryItem.unit_cost,
                unit_price: price,
                status: status,
                mechanic_id: mechanicId,
                observations: observations
            }).then(function() {
                selectedInventoryItem = null;
                document.getElementById('newItemSearch').value = '';
                document.getElementById('newItemQty').value = '1';
                if (!hidePrices) document.getElementById('newItemPrice').value = '';
                document.getElementById('newItemObs').value = '';
                openDetail(currentOrderId);
            }).catch(function(e) { alert('Error: ' + e.message); });
            return;
        }
        // Fallback: manual placeholder (no inventory link)
        var name = document.getElementById('newItemSearch').value.trim();
        if (!name) return;
        var manualPrice = hidePrices ? 0 : (parseFloat(document.getElementById('newItemPrice').value) || 0);
        api('POST', '/' + currentOrderId + '/items', {
            name: name,
            quantity: qty,
            unit_price: manualPrice,
            status: status,
            mechanic_id: mechanicId,
            observations: observations
        }).then(function() {
            document.getElementById('newItemSearch').value = '';
            document.getElementById('newItemQty').value = '1';
            if (!hidePrices) document.getElementById('newItemPrice').value = '';
            document.getElementById('newItemObs').value = '';
            openDetail(currentOrderId);
        }).catch(function(e) { alert('Error: ' + e.message); });
    }

    function editItemInline(itemId) {
        if (!currentOrder || !currentOrder.items) return;
        var it = currentOrder.items.find(function(x) { return x.id === itemId; });
        if (!it) return;
        var newStatus = prompt('Nuevo estado (' + Object.keys(ITEM_STATUS_LABELS).join(', ') + '):', it.status);
        if (!newStatus || !ITEM_STATUS_LABELS[newStatus]) return;
        var newObs = prompt('Observaciones:', it.observations || '');
        var payload = {status: newStatus, observations: newObs != null ? newObs : it.observations};
        api('PUT', '/items/' + itemId, payload)
            .then(function() { openDetail(currentOrderId); })
            .catch(function(e) { alert('Error: ' + e.message); });
    }

    function addLabor() {
        var desc = document.getElementById('laborDesc').value.trim();
        var hours = parseFloat(document.getElementById('laborHours').value) || 0;
        var rate = hidePrices ? 0 : parseFloat(document.getElementById('laborRate').value) || 0;
        if (!desc) return alert('Escribe una descripción');
        api('POST', '/' + currentOrderId + '/labor', {
            description: desc,
            hours: hours,
            hourly_rate: rate,
            status: 'pending'
        }).then(function() {
            document.getElementById('laborDesc').value = '';
            document.getElementById('laborHours').value = '';
            if (!hidePrices) document.getElementById('laborRate').value = '';
            openDetail(currentOrderId);
        }).catch(function(e) { alert('Error: ' + e.message); });
    }

    function convertToSale() {
        if (!currentOrderId) return;
        if (!confirm('¿Convertir esta orden en una venta? Se descontarán las refacciones reservadas del inventario.')) return;
        api('POST', '/' + currentOrderId + '/convert-to-sale', {
            payment_method: 'efectivo',
            sale_type: 'cash'
        }).then(function(r) {
            alert('Venta creada: #' + r.sale_id + ' Total: ' + fmtMoney(r.total));
            closeDetailModal();
            loadSummary();
            loadOrders();
        }).catch(function(e) { alert('Error: ' + e.message); });
    }

    function convertToRemission() {
        if (!currentOrderId) return;
        if (!confirm('¿Generar nota de remisión desde esta orden? Se reservarán las refacciones y quedará pendiente de cobro.')) return;
        api('POST', '/' + currentOrderId + '/convert-to-remission', {})
            .then(function(r) {
                alert('Nota de remisión creada: #' + r.sale_id + ' Total: ' + fmtMoney(r.total));
                closeDetailModal();
                loadSummary();
                loadOrders();
            }).catch(function(e) { alert('Error: ' + e.message); });
    }

    function deleteOrder() {
        if (!currentOrderId) return;
        if (!confirm('¿Eliminar esta orden de servicio? Se ocultará del taller pero las reservas de inventario y la venta asociada (si existe) no se verán afectadas.')) return;
        api('DELETE', '/' + currentOrderId, {})
            .then(function() {
                closeDetailModal();
                loadSummary();
                loadOrders();
            })
            .catch(function(e) { alert('Error: ' + e.message); });
    }

    function printOrder() {
        if (!currentOrderId) return;
        if (!window.NexusPrinter || !window.NexusPrinter.isConnected()) {
            var connect = confirm('No hay impresora conectada. ¿Conectar ahora?');
            if (connect) {
                window.NexusPrinter.connect().then(function(r) {
                    if (r.ok) doPrint();
                });
            }
            return;
        }
        doPrint();

        function doPrint() {
            window.NexusPrinter.printServiceOrder(currentOrderId, 80)
                .then(function(ok) {
                    if (ok) alert('Orden enviada a la impresora');
                    else alert('No se pudo imprimir');
                })
                .catch(function(e) { alert('Error: ' + e.message); });
        }
    }

    // ─── New order ───

    function openNewOrderModal() {
        populateSelect('noBranch', branches, function(b) { return {value: b.id, text: b.name}; });
        populateSelect('noCustomer', customers, function(c) { return {value: c.id, text: c.name + ' (' + (c.phone || '') + ')'}; });
        populateSelect('noCourier', couriers, function(c) { return {value: c.id, text: c.name}; });
        populateMechanicSelect('noMechanic', null);
        document.getElementById('noMechanicName').value = '';
        document.getElementById('noEstimatedCost').value = '';
        var noCustomer = document.getElementById('noCustomer');
        noCustomer.onchange = function() {
            var cid = parseInt(noCustomer.value, 10);
            var c = customers.find(function(x) { return x.id === cid; });
            if (c) {
                document.getElementById('noWorkshopName').value = c.name || '';
                document.getElementById('noCustomerPhone').value = c.phone || '';
                document.getElementById('noCustomerAddress').value = c.address || '';
            }
        };
        document.getElementById('newOrderModal').classList.add('is-open');
    }

    function closeNewOrderModal() {
        document.getElementById('newOrderModal').classList.remove('is-open');
        document.getElementById('newOrderForm').reset();
        var cf = document.getElementById('courierField');
        if (cf) cf.style.display = 'none';
    }

    function submitNewOrder() {
        var customerId = document.getElementById('noCustomer').value;
        var branchId = document.getElementById('noBranch').value;
        if (!customerId) return alert('Selecciona un cliente');
        if (!branchId) return alert('Selecciona una sucursal');
        var delivery = document.getElementById('noDelivery').value;
        var mechanicVal = document.getElementById('noMechanic').value;
        var estimatedCostVal = document.getElementById('noEstimatedCost').value;
        var payload = {
            branch_id: parseInt(branchId, 10),
            customer_id: parseInt(customerId, 10),
            workshop_name: document.getElementById('noWorkshopName').value.trim() || null,
            customer_address: document.getElementById('noCustomerAddress').value.trim() || null,
            customer_phone: document.getElementById('noCustomerPhone').value.trim() || null,
            vehicle_description: document.getElementById('noVehicleDescription').value.trim() || null,
            reception_notes: document.getElementById('noNotes').value,
            delivery_method: delivery || null,
            courier_id: (delivery === 'delivery' || delivery === 'courier') ? (parseInt(document.getElementById('noCourier').value, 10) || null) : null,
            employee_id: mechanicVal ? parseInt(mechanicVal, 10) : null,
            mechanic_name: document.getElementById('noMechanicName').value.trim() || null,
            estimated_cost: estimatedCostVal ? parseFloat(estimatedCostVal) : null,
            is_direct: document.getElementById('noDirect').checked,
            requires_invoice: document.getElementById('noRequiresInvoice').checked
        };
        api('POST', '', payload).then(function() {
            closeNewOrderModal();
            loadSummary();
            loadOrders();
        }).catch(function(e) { alert('Error: ' + e.message); });
    }

    // ─── Catalog ───

    function openCatalogModal() {
        document.getElementById('catalogModal').classList.add('is-open');
        renderCatalog();
    }

    function closeCatalogModal() {
        document.getElementById('catalogModal').classList.remove('is-open');
    }

    function loadCatalog() {
        fetch(API + '/service-catalog?active_only=true', {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(d) {
                catalog = d.data || [];
            })
            .catch(function() {});
    }

    function renderCatalog() {
        var body = document.getElementById('catalogBody');
        if (!catalog.length) {
            body.innerHTML = '<tr><td colspan="' + (hidePrices ? 3 : 5) + '" style="text-align:center;">Sin conceptos</td></tr>';
            return;
        }
        body.innerHTML = catalog.map(function(c) {
            return '<tr>' +
                '<td>' + esc(c.name) + (c.description ? '<br><small>' + esc(c.description) + '</small>' : '') + '</td>' +
                '<td>' + fmt(c.suggested_hours) + '</td>' +
                (hidePrices ? '' : '<td class="price-col">' + fmtMoney(c.suggested_rate) + '</td>' +
                '<td class="price-col">' + fmtMoney(c.suggested_hours * c.suggested_rate) + '</td>') +
                '<td><button class="btn btn--sm btn--ghost" onclick="Workshop.deleteCatalogItem(' + c.id + ')">Desactivar</button></td>' +
                '</tr>';
        }).join('');
    }

    function addCatalogItem() {
        var name = document.getElementById('catName').value.trim();
        if (!name) return alert('Escribe un nombre');
        api('POST', '/service-catalog', {
            name: name,
            description: document.getElementById('catDesc').value,
            suggested_hours: parseFloat(document.getElementById('catHours').value) || 0,
            suggested_rate: parseFloat(document.getElementById('catRate').value) || 0
        }).then(function() {
            document.getElementById('catName').value = '';
            document.getElementById('catDesc').value = '';
            document.getElementById('catHours').value = '';
            document.getElementById('catRate').value = '';
            loadCatalog();
            setTimeout(renderCatalog, 200);
        }).catch(function(e) { alert('Error: ' + e.message); });
    }

    function deleteCatalogItem(id) {
        if (!confirm('¿Desactivar este concepto?')) return;
        api('DELETE', '/service-catalog/' + id, {})
            .then(function() {
                loadCatalog();
                setTimeout(renderCatalog, 200);
            })
            .catch(function(e) { alert('Error: ' + e.message); });
    }

    // ─── Reference data ───

    function loadReferenceData() {
        // Customers
        fetch('/pos/api/customers?per_page=500', {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(d) { customers = (d.data || d.customers || []); })
            .catch(function() {});
        // Employees
        fetch('/pos/api/config/employees?per_page=500', {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(d) { employees = (d.data || d.employees || []); })
            .catch(function() { employees = []; });
        // Couriers
        fetch('/pos/api/logistics/couriers?per_page=500', {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(d) {
                couriers = (d.data || d.couriers || []);
                populateSelect('noCourier', couriers, function(c) { return {value: c.id, text: c.name}; });
            })
            .catch(function() { couriers = []; });
        // Branches
        fetch('/pos/api/config/branches', {headers: headers()})
            .then(function(r) { return r.json(); })
            .then(function(d) {
                branches = (d.data || []);
                populateBranchFilter();
                var noBranch = document.getElementById('noBranch');
                var userBranch = (window.POS_USER || {}).branch_id;
                if (noBranch && userBranch && branches.some(function(b) { return b.id == userBranch; })) {
                    noBranch.value = userBranch;
                }
            })
            .catch(function() { branches = []; });
    }

    function populateBranchFilter() {
        var sel = document.getElementById('filterBranch');
        if (!sel) return;
        var current = sel.value;
        sel.innerHTML = '<option value="">Todas las sucursales</option>';
        branches.forEach(function(b) {
            var opt = document.createElement('option');
            opt.value = b.id;
            opt.textContent = b.name;
            sel.appendChild(opt);
        });
        sel.value = current;
    }

    function populateSelect(id, items, mapper) {
        var sel = document.getElementById(id);
        if (!sel) return;
        sel.innerHTML = id === 'noCustomer' || id === 'noCourier' ? '' : '<option value="">—</option>';
        items.forEach(function(it) {
            var opt = mapper(it);
            var el = document.createElement('option');
            el.value = opt.value;
            el.textContent = opt.text;
            sel.appendChild(el);
        });
    }

    // ─── Public API ───

    return {
        init: init,
        setView: setView,
        goPage: goPage,
        openDetail: openDetail,
        closeDetailModal: closeDetailModal,
        switchTab: switchTab,
        changeStatus: changeStatus,
        reserveItem: reserveItem,
        saveNotes: saveNotes,
        saveMechanicName: saveMechanicName,
        searchItemsForSO: searchItemsForSO,
        selectInventoryItem: selectInventoryItem,
        addSelectedItem: addSelectedItem,
        editItemInline: editItemInline,
        addLabor: addLabor,
        convertToSale: convertToSale,
        convertToRemission: convertToRemission,
        deleteOrder: deleteOrder,
        printOrder: printOrder,
        openNewOrderModal: openNewOrderModal,
        closeNewOrderModal: closeNewOrderModal,
        submitNewOrder: submitNewOrder,
        openCatalogModal: openCatalogModal,
        closeCatalogModal: closeCatalogModal,
        addCatalogItem: addCatalogItem,
        deleteCatalogItem: deleteCatalogItem,
        openEditOrderModal: openEditOrderModal,
        closeEditOrderModal: closeEditOrderModal,
        saveOrderChanges: saveOrderChanges,
        selectEditCustomer: selectEditCustomer,
        selectEditVehicle: selectEditVehicle,
        searchCustomersForSO: searchCustomersForSO,
        searchVehiclesForSO: searchVehiclesForSO,
        openNewVehicleModal: openNewVehicleModal,
        openNewVehicleModalFromNewOrder: openNewVehicleModalFromNewOrder,
        closeNewVehicleModal: closeNewVehicleModal,
        saveNewVehicle: saveNewVehicle,
        openNewCustomerModal: openNewCustomerModal,
        openNewCustomerModalFromNewOrder: openNewCustomerModalFromNewOrder,
        closeNewCustomerModal: closeNewCustomerModal,
        saveNewCustomer: saveNewCustomer,
    };
})();

document.addEventListener('DOMContentLoaded', Workshop.init);