/**
 * UI Template - Design System Unificado BI-CCC
 * Header, Footer e estilos compartilhados
 */

// CSS Variables compartilhadas - Cores CambioReal
const cssVariables = `
  :root {
    --primary: #7600be;
    --primary-light: #9B2DE5;
    --primary-dark: #5A0091;
    --primary-bg: #F5EAFA;
    --admin-accent: #2E7D32;
    --admin-dark: #1B5E20;
    --admin-bg: #E8F5E9;
    --corporate-accent: #7600be;
    --corporate-dark: #5A0091;
    --corporate-bg: #F5EAFA;
    --bg: #F0F2F5;
    --card: #FFFFFF;
    --text: #1A1D23;
    --text-secondary: #5F6368;
    --text-muted: #9AA0A6;
    --border: #E8EAED;
    --green: #1E8E3E;
    --green-bg: #E6F4EA;
    --blue: #1A73E8;
    --blue-bg: #E8F0FE;
    --orange: #E8710A;
    --orange-bg: #FEF3E8;
    --red: #D93025;
    --red-bg: #FDE7E7;
    --purple: #7B1FA2;
    --purple-bg: #F3E5F5;
  }
`;

// CSS do Header unificado
const headerCSS = `
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg); color: var(--text); line-height: 1.5;
    -webkit-font-smoothing: antialiased;
  }

  /* Header Unificado */
  .app-header {
    background: linear-gradient(135deg, var(--header-color) 0%, var(--header-dark) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  }
  .app-header.admin {
    --header-color: var(--admin-accent);
    --header-dark: var(--admin-dark);
  }
  .app-header.corporate {
    --header-color: var(--corporate-accent);
    --header-dark: var(--corporate-dark);
  }
  .app-header.agent {
    --header-color: var(--primary);
    --header-dark: var(--primary-dark);
  }
  .header-inner {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
  }

  .header-brand {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    color: white;
  }
  .header-brand:hover {
    opacity: 0.95;
  }
  .header-brand .logo {
    height: 36px;
    width: auto;
    background: white;
    padding: 6px 12px;
    border-radius: 8px;
  }
  .header-brand .app-name {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .header-brand .app-name-badge {
    background: rgba(255,255,255,0.2);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.5px;
  }
  .header-brand .app-subtitle {
    font-size: 11px;
    opacity: 0.8;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
  }

  .header-nav {
    display: flex;
    align-items: center;
    gap: 4px;
  }
  .header-nav a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.15s;
    opacity: 0.85;
  }
  .header-nav a:hover {
    background: rgba(255,255,255,0.15);
    opacity: 1;
  }
  .header-nav a.active {
    background: rgba(255,255,255,0.2);
    opacity: 1;
  }

  .header-user {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .header-user .user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255,255,255,0.1);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
  }
  .header-user .user-avatar {
    width: 28px;
    height: 28px;
    background: rgba(255,255,255,0.25);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
  }
  .header-user .user-role {
    font-size: 10px;
    background: rgba(255,255,255,0.2);
    padding: 2px 8px;
    border-radius: 10px;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.5px;
  }
  .header-user .btn-logout {
    background: rgba(255,255,255,0.15);
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    font-family: inherit;
    transition: all 0.15s;
  }
  .header-user .btn-logout:hover {
    background: rgba(255,255,255,0.25);
  }

  /* Footer */
  .app-footer {
    text-align: center;
    padding: 20px;
    font-size: 12px;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    background: var(--card);
    margin-top: auto;
  }

  /* Container padrão */
  .app-container {
    padding: 28px 40px;
    max-width: 1600px;
    margin: 0 auto;
  }

  /* Responsive */
  @media (max-width: 768px) {
    .header-inner {
      padding: 12px 16px;
      height: auto;
      flex-direction: column;
      gap: 10px;
    }
    .header-brand {
      gap: 10px;
    }
    .header-brand .logo {
      height: 28px;
      padding: 4px 8px;
    }
    .header-brand .app-name-badge {
      font-size: 12px;
      padding: 5px 10px;
    }
    .header-brand .app-subtitle {
      display: none;
    }
    .header-nav {
      width: 100%;
      justify-content: center;
      gap: 6px;
    }
    .header-nav a {
      font-size: 12px;
      padding: 8px 12px;
    }
    .header-user {
      width: 100%;
      justify-content: center;
      gap: 10px;
    }
    .header-user .user-info {
      font-size: 12px;
    }
    .header-user .avatar {
      width: 32px;
      height: 32px;
      font-size: 11px;
    }
    .header-user .btn-logout {
      font-size: 11px;
      padding: 6px 12px;
    }
    .app-container {
      padding: 16px;
    }
  }

  @media (max-width: 480px) {
    .header-inner {
      padding: 10px 12px;
    }
    .header-nav {
      flex-wrap: wrap;
    }
    .header-nav a {
      font-size: 11px;
      padding: 6px 10px;
    }
    .header-user .user-info {
      display: none;
    }
    .app-container {
      padding: 12px;
    }
  }
`;

/**
 * Gera o header HTML
 * @param {Object} options
 * @param {string} options.role - 'admin', 'corporate' ou 'agente'
 * @param {string} options.userName - Nome do usuário
 * @param {string} options.activePage - Página ativa para nav
 * @param {boolean} options.showNav - Mostrar navegação
 */
function buildHeader(options = {}) {
  const { role = 'agente', userName = '', activePage = '', showNav = true } = options;
  const isAdmin = role === 'admin';
  const isCorporate = role === 'corporate';

  // Determine header class: admin (green), corporate (purple), agent (purple)
  let headerClass = 'agent';
  if (isAdmin) headerClass = 'admin';
  else if (isCorporate) headerClass = 'corporate';

  const initials = userName
    .split(' ')
    .map(n => n[0])
    .slice(0, 2)
    .join('')
    .toUpperCase();

  // Admin navigation: Corporate Dashboard + Users (admin on the right)
  const adminNav = `
    <nav class="header-nav">
      <a href="/corporate" class="${activePage === 'dashboard' ? 'active' : ''}">Corporate</a>
      <a href="/admin" class="${activePage === 'users' ? 'active' : ''}">Usuarios</a>
    </nav>
  `;

  // Corporate navigation: Dashboard only
  const corporateNav = `
    <nav class="header-nav">
      <a href="/corporate" class="${activePage === 'dashboard' ? 'active' : ''}">Dashboard</a>
    </nav>
  `;

  // Agent navigation: Just their dashboard
  const agentNav = `
    <nav class="header-nav">
      <a href="/dashboard" class="active">Meu Dashboard</a>
    </nav>
  `;

  // Select navigation based on role
  let nav = agentNav;
  if (isAdmin) nav = adminNav;
  else if (isCorporate) nav = corporateNav;

  // Home URL based on role
  let homeUrl = '/dashboard';
  if (isAdmin) homeUrl = '/corporate'; // Admin home is Corporate Dashboard
  else if (isCorporate) homeUrl = '/corporate';

  // Role label for display
  let roleLabel = 'Agente';
  if (isAdmin) roleLabel = 'Admin';
  else if (isCorporate) roleLabel = 'Corporate';

  return `
    <header class="app-header ${headerClass}">
      <div class="header-inner">
        <a href="${homeUrl}" class="header-brand">
          <img src="/public/logo.png" alt="CambioReal" class="logo">
          <div class="app-name">
            <span class="app-name-badge">BI - CCC</span>
            <span class="app-subtitle">Central Command Center</span>
          </div>
        </a>
        ${showNav ? nav : ''}
        <div class="header-user">
          <div class="user-info">
            <span class="user-avatar">${initials}</span>
            <span>${userName}</span>
            <span class="user-role">${roleLabel}</span>
          </div>
          <a href="/logout" class="btn-logout">Sair</a>
        </div>
      </div>
    </header>
  `;
}

/**
 * Gera o footer HTML
 */
function buildFooter() {
  const year = new Date().getFullYear();
  return `
    <footer class="app-footer">
      CambioReal &copy; ${year} &mdash; BI - CCC (Central Command Center)
    </footer>
  `;
}

/**
 * Gera o head HTML com estilos base
 * @param {string} title - Título da página
 * @param {string} additionalCSS - CSS adicional
 * @param {string} scripts - Scripts externos (opcional)
 */
function buildHead(title, additionalCSS = '', scripts = '') {
  return `
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>${title} | BI - CCC</title>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap" rel="stylesheet">
    ${scripts}
    <style>
      ${cssVariables}
      ${headerCSS}
      ${additionalCSS}
    </style>
  `;
}

module.exports = {
  buildHeader,
  buildFooter,
  buildHead,
  cssVariables,
  headerCSS
};