/**
 * sidebar.js — Shared sidebar component for all POS pages
 *
 * Injects a consistent sidebar into any page that has a <aside class="sidebar"> or
 * <div id="pos-sidebar-container">. Overrides the page's own sidebar content
 * with a standardized navigation.
 */
(function() {
    'use strict';

    var employee = window.POS_USER || {};
    var name = employee.name || 'Usuario';
    var roleLabel = employee.roleLabel || '';
    var initials = employee.initials || '?';
    var currentPath = window.location.pathname;

    var navItems = [
        { label: 'Dashboard',     icon: '📊', href: '/pos/dashboard' },
        { label: 'Punto de Venta', icon: '💰', href: '/pos/sale' },
        { label: 'Catálogo',      icon: '📦', href: '/pos/catalog' },
        { label: 'Inventario',    icon: '📋', href: '/pos/inventory' },
        { label: 'Clientes',      icon: '👥', href: '/pos/customers' },
        { label: 'Facturación',   icon: '🧾', href: '/pos/invoicing' },
        { label: 'Contabilidad',  icon: '📒', href: '/pos/accounting' },
        { label: 'Reportes',      icon: '📈', href: '/pos/reports' },
        { label: 'Configuración', icon: '⚙️', href: '/pos/config' },
    ];

    // Build sidebar HTML
    var linksHtml = navItems.map(function(item) {
        var isActive = currentPath === item.href;
        var cls = 'pos-nav__item' + (isActive ? ' is-active' : '');
        return '<a class="' + cls + '" href="' + item.href + '">'
            + '<span class="pos-nav__icon">' + item.icon + '</span>'
            + '<span class="pos-nav__label">' + item.label + '</span>'
            + '</a>';
    }).join('');

    var sidebarHtml = ''
        + '<div class="pos-sidebar__brand">'
        + '  <div class="pos-sidebar__logo">N</div>'
        + '  <div class="pos-sidebar__title">Nexus POS</div>'
        + '</div>'
        + '<nav class="pos-sidebar__nav">' + linksHtml + '</nav>'
        + '<div class="pos-sidebar__footer">'
        + '  <div class="pos-sidebar__user">'
        + '    <div class="pos-sidebar__avatar">' + initials + '</div>'
        + '    <div class="pos-sidebar__user-info">'
        + '      <div class="pos-sidebar__user-name">' + name + '</div>'
        + '      <div class="pos-sidebar__user-role">' + roleLabel + '</div>'
        + '    </div>'
        + '  </div>'
        + '  <button class="pos-sidebar__logout" onclick="posLogout()" title="Cerrar sesión">⏻</button>'
        + '</div>';

    // Inject CSS
    var css = document.createElement('style');
    css.textContent = ''
        + '.pos-sidebar {'
        + '  position: fixed; top: 0; left: 0; bottom: 0; width: 220px;'
        + '  background: var(--color-bg-elevated, #161B22);'
        + '  border-right: 1px solid var(--color-border, #30363D);'
        + '  display: flex; flex-direction: column;'
        + '  z-index: 100; overflow-y: auto;'
        + '  font-family: var(--font-body, sans-serif);'
        + '  transition: background-color 0.3s;'
        + '}'
        + '.pos-sidebar__brand {'
        + '  display: flex; align-items: center; gap: 10px;'
        + '  padding: 16px 16px 12px; border-bottom: 1px solid var(--color-border, #30363D);'
        + '}'
        + '.pos-sidebar__logo {'
        + '  width: 36px; height: 36px; border-radius: 8px;'
        + '  background: var(--color-primary, #F5A623); color: #fff;'
        + '  display: flex; align-items: center; justify-content: center;'
        + '  font-weight: 800; font-size: 1.1rem;'
        + '}'
        + '.pos-sidebar__title {'
        + '  font-weight: 700; font-size: 1rem;'
        + '  color: var(--color-text-primary, #E6EDF3);'
        + '}'
        + '.pos-sidebar__nav {'
        + '  flex: 1; padding: 8px 8px; display: flex; flex-direction: column; gap: 2px;'
        + '}'
        + '.pos-nav__item {'
        + '  display: flex; align-items: center; gap: 10px;'
        + '  padding: 9px 12px; border-radius: 6px;'
        + '  color: var(--color-text-secondary, #8B949E);'
        + '  text-decoration: none; font-size: 0.88rem; font-weight: 500;'
        + '  transition: all 0.15s;'
        + '}'
        + '.pos-nav__item:hover {'
        + '  background: var(--color-bg-base, rgba(255,255,255,0.05));'
        + '  color: var(--color-text-primary, #E6EDF3);'
        + '}'
        + '.pos-nav__item.is-active {'
        + '  background: var(--color-primary, #F5A623);'
        + '  color: #fff; font-weight: 600;'
        + '}'
        + '.pos-nav__icon { font-size: 1rem; width: 20px; text-align: center; }'
        + '.pos-nav__label { white-space: nowrap; }'
        + '.pos-sidebar__footer {'
        + '  padding: 12px; border-top: 1px solid var(--color-border, #30363D);'
        + '  display: flex; align-items: center; justify-content: space-between;'
        + '}'
        + '.pos-sidebar__user {'
        + '  display: flex; align-items: center; gap: 8px;'
        + '}'
        + '.pos-sidebar__avatar {'
        + '  width: 32px; height: 32px; border-radius: 50%;'
        + '  background: var(--color-primary, #F5A623); color: #fff;'
        + '  display: flex; align-items: center; justify-content: center;'
        + '  font-size: 0.75rem; font-weight: 700;'
        + '}'
        + '.pos-sidebar__user-name {'
        + '  font-size: 0.82rem; font-weight: 600;'
        + '  color: var(--color-text-primary, #E6EDF3);'
        + '}'
        + '.pos-sidebar__user-role {'
        + '  font-size: 0.7rem; color: var(--color-text-muted, #6a6a7a);'
        + '}'
        + '.pos-sidebar__logout {'
        + '  background: none; border: 1px solid var(--color-border, #30363D);'
        + '  color: var(--color-text-muted, #6a6a7a); border-radius: 6px;'
        + '  padding: 6px 8px; cursor: pointer; font-size: 1rem;'
        + '  transition: all 0.15s;'
        + '}'
        + '.pos-sidebar__logout:hover {'
        + '  color: var(--color-error, #F85149);'
        + '  border-color: var(--color-error, #F85149);'
        + '}'
        + '/* Push main content right */'
        + '.pos-main-offset { margin-left: 220px; }'
        + '@media (max-width: 768px) {'
        + '  .pos-sidebar { width: 60px; }'
        + '  .pos-nav__label, .pos-sidebar__title,'
        + '  .pos-sidebar__user-info { display: none; }'
        + '  .pos-sidebar__footer { justify-content: center; }'
        + '  .pos-sidebar__user { justify-content: center; }'
        + '  .pos-main-offset { margin-left: 60px; }'
        + '}';
    document.head.appendChild(css);

    // Find or create sidebar container
    // Strategy: replace existing sidebar content or create new one
    var existingSidebar = document.querySelector('aside.sidebar, .sidebar, #sidebar');

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

    // Add offset class to main content
    var mainContent = document.querySelector('main, .main-content, #mainContent, .page-content');
    if (mainContent) {
        mainContent.classList.add('pos-main-offset');
    }

})();