/**
 * sidebar.js — Shared sidebar matching the design system style
 * Replaces existing sidebar in each page with a consistent, themed version.
 */
(function() {
    'use strict';

    var u = window.POS_USER || {};
    var name = u.name || 'Usuario';
    var roleLabel = u.roleLabel || '';
    var initials = u.initials || '?';
    var currentPath = window.location.pathname;
    var currentTheme = localStorage.getItem('pos_theme') || 'industrial';

    var navSections = [
        { label: 'Principal', items: [
            { name: 'Dashboard', href: '/pos/dashboard', icon: '<rect x="3" y="3" width="7" height="7"/><rect x="14" y="3" width="7" height="7"/><rect x="14" y="14" width="7" height="7"/><rect x="3" y="14" width="7" height="7"/>' },
            { name: 'POS', href: '/pos/sale', icon: '<rect x="2" y="3" width="20" height="14" rx="2"/><path d="M8 21h8M12 17v4"/>' },
            { name: 'Catálogo', href: '/pos/catalog', icon: '<path d="M4 6h16M4 10h16M4 14h16M4 18h16"/>' },
            { name: 'Inventario', href: '/pos/inventory', icon: '<path d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z"/><polyline points="3.27 6.96 12 12.01 20.73 6.96"/><line x1="12" y1="22.08" x2="12" y2="12"/>' },
        ]},
        { label: 'Gestión', items: [
            { name: 'Clientes', href: '/pos/customers', icon: '<path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/><circle cx="9" cy="7" r="4"/><path d="M23 21v-2a4 4 0 0 0-3-3.87M16 3.13a4 4 0 0 1 0 7.75"/>' },
            { name: 'Facturación', href: '/pos/invoicing', icon: '<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><polyline points="14 2 14 8 20 8"/><line x1="16" y1="13" x2="8" y2="13"/><line x1="16" y1="17" x2="8" y2="17"/><polyline points="10 9 9 9 8 9"/>' },
            { name: 'Contabilidad', href: '/pos/accounting', icon: '<line x1="12" y1="1" x2="12" y2="23"/><path d="M17 5H9.5a3.5 3.5 0 0 0 0 7h5a3.5 3.5 0 0 1 0 7H6"/>' },
            { name: 'Reportes', href: '/pos/reports', icon: '<line x1="18" y1="20" x2="18" y2="10"/><line x1="12" y1="20" x2="12" y2="4"/><line x1="6" y1="20" x2="6" y2="14"/>' },
            { name: 'Flotillas', href: '/pos/fleet', icon: '<path d="M1 13h22M1 13l2-6h6l2 6M9 7h6l2 6M15 13l2-6M5 17a2 2 0 1 0 0-4 2 2 0 0 0 0 4zM19 17a2 2 0 1 0 0-4 2 2 0 0 0 0 4z"/>' },
            { name: 'WhatsApp', href: '/pos/whatsapp', icon: '<path d="M21 11.5a8.38 8.38 0 0 1-.9 3.8 8.5 8.5 0 0 1-7.6 4.7 8.38 8.38 0 0 1-3.8-.9L3 21l1.9-5.7a8.38 8.38 0 0 1-.9-3.8 8.5 8.5 0 0 1 4.7-7.6 8.38 8.38 0 0 1 3.8-.9h.5a8.48 8.48 0 0 1 8 8v.5z"/>' },
        ]},
        { label: 'Sistema', items: [
            { name: 'Configuración', href: '/pos/config', icon: '<circle cx="12" cy="12" r="3"/><path d="M19.07 4.93a10 10 0 0 1 0 14.14M4.93 4.93a10 10 0 0 0 0 14.14"/>' },
        ]},
    ];

    function svgIcon(paths) {
        return '<svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">' + paths + '</svg>';
    }

    // Build nav HTML
    var navHtml = '';
    navSections.forEach(function(sec) {
        navHtml += '<div class="nav-section-label">' + sec.label + '</div>';
        sec.items.forEach(function(item) {
            var active = currentPath === item.href;
            navHtml += '<a class="nav-item' + (active ? ' is-active' : '') + '" href="' + item.href + '"'
                + (active ? ' aria-current="page"' : '') + '>'
                + svgIcon(item.icon)
                + '<span>' + item.name + '</span></a>';
        });
    });

    // Theme toggle buttons
    var themeHtml = '<div class="sidebar__theme-toggle">'
        + '<button class="theme-toggle-btn' + (currentTheme === 'industrial' ? ' is-active' : '') + '" onclick="posSetTheme(\'industrial\');updateThemeButtons()" title="Tema oscuro">'
        + '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/></svg>'
        + '</button>'
        + '<button class="theme-toggle-btn' + (currentTheme === 'modern' ? ' is-active' : '') + '" onclick="posSetTheme(\'modern\');updateThemeButtons()" title="Tema claro">'
        + '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg>'
        + '</button>'
        + '</div>';

    window.updateThemeButtons = function() {
        var t = localStorage.getItem('pos_theme') || 'industrial';
        document.querySelectorAll('.theme-toggle-btn').forEach(function(b, i) {
            b.classList.toggle('is-active', i === 0 ? t === 'industrial' : t === 'modern');
        });
    };

    var sidebarHtml = ''
        + '<div class="sidebar__brand">'
        + '  <div class="brand-logo">NA</div>'
        + '  <div class="brand-name">'
        + '    <span class="brand-name__primary">Nexus</span>'
        + '    <span class="brand-name__sub">Autoparts POS</span>'
        + '  </div>'
        + '</div>'
        + '<nav class="sidebar__nav">' + navHtml + '</nav>'
        + themeHtml
        + '<div class="sidebar__footer">'
        + '  <div class="sidebar__user-avatar">' + initials + '</div>'
        + '  <div class="sidebar__user-info">'
        + '    <div class="sidebar__user-name">' + name + '</div>'
        + '    <div class="sidebar__user-role">' + roleLabel + '</div>'
        + '  </div>'
        + '  <button class="sidebar__logout-btn" onclick="posLogout()" title="Cerrar sesión">'
        + '    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"/><polyline points="16 17 21 12 16 7"/><line x1="21" y1="12" x2="9" y2="12"/></svg>'
        + '  </button>'
        + '</div>';

    // CSS matching the design system
    var css = document.createElement('style');
    css.textContent = [
        '.pos-sidebar{position:fixed;top:0;left:0;bottom:0;width:260px;display:flex;flex-direction:column;background:var(--color-bg-elevated);border-right:1px solid var(--color-border);z-index:100;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb,#444) var(--scrollbar-track,#222);font-family:var(--font-body)}',
        '.pos-sidebar::-webkit-scrollbar{width:4px}',
        '.pos-sidebar::-webkit-scrollbar-track{background:var(--scrollbar-track,#222)}',
        '.pos-sidebar::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb,#444);border-radius:99px}',

        '.sidebar__brand{display:flex;align-items:center;gap:var(--space-3,12px);padding:var(--space-4,16px) var(--space-4,16px) var(--space-3,12px);border-bottom:1px solid var(--color-border);flex-shrink:0}',
        '.brand-logo{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:var(--color-primary);color:var(--color-text-inverse,#fff);font-family:var(--font-heading);font-weight:800;font-size:1rem;letter-spacing:-0.04em;flex-shrink:0}',
        '[data-theme="industrial"] .brand-logo{clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,0 100%)}',
        '[data-theme="modern"] .brand-logo{border-radius:var(--radius-md,8px)}',
        '.brand-name__primary{font-family:var(--font-heading);font-weight:800;font-size:0.9375rem;letter-spacing:var(--tracking-wide,0.02em);text-transform:uppercase;color:var(--color-text-primary);line-height:1}',
        '.brand-name__sub{font-size:var(--text-caption,0.75rem);color:var(--color-text-muted);letter-spacing:var(--tracking-wider,0.04em);text-transform:uppercase;margin-top:2px}',

        '.sidebar__nav{flex:1;padding:var(--space-3,12px) 0}',
        '.nav-section-label{padding:var(--space-3,12px) var(--space-4,16px) var(--space-1,4px);font-size:0.6875rem;font-weight:600;letter-spacing:var(--tracking-widest,0.08em);text-transform:uppercase;color:var(--color-text-muted)}',
        '.nav-item{display:flex;align-items:center;gap:var(--space-3,12px);padding:var(--space-2,8px) var(--space-4,16px);color:var(--color-text-secondary);text-decoration:none;font-size:var(--text-body-sm,0.875rem);font-weight:400;border-left:3px solid transparent;transition:all 0.15s;cursor:pointer}',
        '.nav-item:hover{background:var(--color-surface-2,rgba(255,255,255,0.04));color:var(--color-text-primary)}',
        '.nav-item.is-active{background:var(--color-primary-muted,rgba(245,166,35,0.12));color:var(--color-primary);border-left-color:var(--color-primary);font-weight:600}',
        '.nav-item__icon{width:18px;height:18px;flex-shrink:0;opacity:0.7}',
        '.nav-item.is-active .nav-item__icon{opacity:1}',

        '.sidebar__theme-toggle{display:flex;gap:4px;padding:8px 16px;border-top:1px solid var(--color-border)}',
        '.theme-toggle-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:6px;border:1px solid var(--color-border);border-radius:var(--radius-sm,4px);background:none;color:var(--color-text-muted);cursor:pointer;transition:all 0.15s;font-size:0.75rem}',
        '.theme-toggle-btn:hover{color:var(--color-text-primary);background:var(--color-surface-2,rgba(255,255,255,0.04))}',
        '.theme-toggle-btn.is-active{background:var(--color-primary-muted,rgba(245,166,35,0.12));color:var(--color-primary);border-color:var(--color-primary)}',

        '.sidebar__footer{padding:var(--space-3,12px) var(--space-4,16px);border-top:1px solid var(--color-border);display:flex;align-items:center;gap:var(--space-2,8px)}',
        '.sidebar__user-avatar{width:28px;height:28px;border-radius:50%;background:var(--color-primary);color:var(--color-text-inverse,#fff);display:flex;align-items:center;justify-content:center;font-size:0.6875rem;font-weight:700;flex-shrink:0}',
        '.sidebar__user-info{flex:1;overflow:hidden}',
        '.sidebar__user-name{font-size:var(--text-body-sm,0.875rem);font-weight:600;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}',
        '.sidebar__user-role{font-size:var(--text-caption,0.75rem);color:var(--color-text-muted)}',
        '.sidebar__logout-btn{background:none;border:1px solid var(--color-border);border-radius:var(--radius-sm,4px);padding:4px 6px;cursor:pointer;color:var(--color-text-muted);transition:all 0.15s;display:flex;align-items:center}',
        '.sidebar__logout-btn:hover{color:var(--color-error,#F85149);border-color:var(--color-error,#F85149)}',

        '.pos-main-offset{margin-left:260px}',
        '@media(max-width:768px){.pos-sidebar{width:56px}.brand-name,.nav-item span,.sidebar__user-info,.nav-section-label,.sidebar__theme-toggle{display:none}.sidebar__brand{justify-content:center;padding:12px 8px}.sidebar__footer{flex-direction:column;padding:8px}.pos-main-offset{margin-left:56px}}',
    ].join('\n');
    document.head.appendChild(css);

    // Replace existing sidebar
    var existing = document.querySelector('aside.sidebar, .sidebar, #sidebar');
    if (existing) {
        existing.className = 'pos-sidebar';
        existing.innerHTML = sidebarHtml;
        existing.removeAttribute('style');
    } else {
        var el = document.createElement('aside');
        el.className = 'pos-sidebar';
        el.innerHTML = sidebarHtml;
        document.body.insertBefore(el, document.body.firstChild);
    }

    // Offset main content
    var main = document.querySelector('main, .main-content, #mainContent, .main, .page-content');
    if (main) main.classList.add('pos-main-offset');

})();