// Shared Authentication Utility for Admin Panel
// Include this file in all admin pages to handle authentication

// Global authentication state
window.adminAuth = {
  user: null,
  isAuthenticated: false,
};

// Check authentication and redirect if needed - attach to window
window.checkAuth = async function () {
  try {
    const response = await fetch("/api/admin/session", {
      credentials: "include",
      headers: {
        Accept: "application/json",
      },
    });

    if (!response.ok) {
      window.redirectToLogin();
      return false;
    }

    const data = await response.json();
    if (!data.authenticated) {
      window.redirectToLogin();
      return false;
    }

    // Store user data
    window.adminAuth.user = data.user;
    window.adminAuth.isAuthenticated = true;

    // Initialize mobile menu after auth check
    window.initMobileMenu();

    return true;
  } catch (error) {
    // Only log in development
    if (window.location.hostname === "localhost") {
      console.error("Authentication check failed:", error);
    }
    window.redirectToLogin();
    return false;
  }
};

// Redirect to login page
window.redirectToLogin = function () {
  if (window.location.pathname !== "/admin/login.html") {
    window.location.href = "/admin/login.html";
  }
};

// Initialize mobile menu toggle
window.initMobileMenu = function () {
  // Check if mobile menu button exists
  let menuToggle = document.getElementById("mobileMenuToggle");

  if (!menuToggle && window.innerWidth <= 768) {
    // Create mobile menu button
    menuToggle = document.createElement("button");
    menuToggle.id = "mobileMenuToggle";
    menuToggle.className = "mobile-menu-toggle";
    menuToggle.setAttribute("aria-label", "Toggle navigation menu");
    menuToggle.setAttribute("aria-expanded", "false");
    menuToggle.innerHTML = '<i class="bi bi-list"></i>';
    document.body.appendChild(menuToggle);
  }

  if (menuToggle) {
    menuToggle.addEventListener("click", function () {
      const sidebar = document.querySelector(".sidebar");
      if (sidebar) {
        const isActive = sidebar.classList.toggle("active");
        this.setAttribute("aria-expanded", isActive ? "true" : "false");
        this.innerHTML = isActive
          ? '<i class="bi bi-x"></i>'
          : '<i class="bi bi-list"></i>';
      }
    });

    // Close sidebar when clicking outside on mobile
    document.addEventListener("click", function (event) {
      const sidebar = document.querySelector(".sidebar");
      const menuToggle = document.getElementById("mobileMenuToggle");

      if (sidebar && menuToggle && window.innerWidth <= 768) {
        if (
          !sidebar.contains(event.target) &&
          event.target !== menuToggle &&
          !menuToggle.contains(event.target)
        ) {
          if (sidebar.classList.contains("active")) {
            sidebar.classList.remove("active");
            menuToggle.setAttribute("aria-expanded", "false");
            menuToggle.innerHTML = '<i class="bi bi-list"></i>';
          }
        }
      }
    });

    // Close menu on link click (mobile)
    const sidebarLinks = document.querySelectorAll(".sidebar-menu a");
    sidebarLinks.forEach((link) => {
      link.addEventListener("click", function () {
        if (window.innerWidth <= 768) {
          const sidebar = document.querySelector(".sidebar");
          if (sidebar && sidebar.classList.contains("active")) {
            sidebar.classList.remove("active");
            if (menuToggle) {
              menuToggle.setAttribute("aria-expanded", "false");
              menuToggle.innerHTML = '<i class="bi bi-list"></i>';
            }
          }
        }
      });
    });
  }

  // Handle window resize
  let resizeTimer;
  window.addEventListener("resize", function () {
    clearTimeout(resizeTimer);
    resizeTimer = setTimeout(function () {
      if (window.innerWidth > 768) {
        const sidebar = document.querySelector(".sidebar");
        if (sidebar) {
          sidebar.classList.remove("active");
        }
        if (menuToggle) {
          menuToggle.setAttribute("aria-expanded", "false");
          menuToggle.innerHTML = '<i class="bi bi-list"></i>';
        }
      }
    }, 250);
  });
};

// Custom logout confirmation modal
window.showLogoutConfirm = function (onConfirm) {
  // Create modal backdrop
  const backdrop = document.createElement("div");
  backdrop.style.cssText = `
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
  `;

  // Create modal
  const modal = document.createElement("div");
  modal.style.cssText = `
    background: white;
    border-radius: 12px;
    padding: 30px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease;
  `;

  modal.innerHTML = `
    <style>
      @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
      }
      @keyframes slideIn {
        from { transform: translateY(-20px); opacity: 0; }
        to { transform: translateY(0); opacity: 1; }
      }
    </style>
    <div style="text-align: center;">
      <div style="font-size: 48px; margin-bottom: 15px;">
        <i class="bi bi-box-arrow-right" style="color: #dc3545;"></i>
      </div>
      <h3 style="margin: 0 0 10px 0; color: #2c3e50; font-weight: 600;">Confirm Logout</h3>
      <p style="color: #6c757d; margin: 0 0 25px 0;">Are you sure you want to logout?</p>
      <div style="display: flex; gap: 10px; justify-content: center;">
        <button id="cancelLogout" style="
          padding: 10px 24px;
          border: 2px solid #6c757d;
          background: white;
          color: #6c757d;
          border-radius: 8px;
          cursor: pointer;
          font-size: 14px;
          font-weight: 600;
          transition: all 0.2s;
        ">Cancel</button>
        <button id="confirmLogout" style="
          padding: 10px 24px;
          border: none;
          background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
          color: white;
          border-radius: 8px;
          cursor: pointer;
          font-size: 14px;
          font-weight: 600;
          transition: all 0.2s;
          box-shadow: 0 2px 8px rgba(220, 53, 69, 0.3);
        ">Logout</button>
      </div>
    </div>
  `;

  backdrop.appendChild(modal);
  document.body.appendChild(backdrop);

  // Add hover effects
  const cancelBtn = modal.querySelector("#cancelLogout");
  const confirmBtn = modal.querySelector("#confirmLogout");

  cancelBtn.addEventListener("mouseenter", function () {
    this.style.background = "#6c757d";
    this.style.color = "white";
  });
  cancelBtn.addEventListener("mouseleave", function () {
    this.style.background = "white";
    this.style.color = "#6c757d";
  });

  confirmBtn.addEventListener("mouseenter", function () {
    this.style.transform = "translateY(-2px)";
    this.style.boxShadow = "0 4px 12px rgba(220, 53, 69, 0.4)";
  });
  confirmBtn.addEventListener("mouseleave", function () {
    this.style.transform = "translateY(0)";
    this.style.boxShadow = "0 2px 8px rgba(220, 53, 69, 0.3)";
  });

  // Handle buttons
  const closeModal = () => {
    backdrop.style.animation = "fadeIn 0.2s ease reverse";
    setTimeout(() => backdrop.remove(), 200);
  };

  cancelBtn.addEventListener("click", closeModal);
  backdrop.addEventListener("click", function (e) {
    if (e.target === backdrop) closeModal();
  });

  confirmBtn.addEventListener("click", function () {
    closeModal();
    onConfirm();
  });

  // ESC key to close
  const escHandler = (e) => {
    if (e.key === "Escape") {
      closeModal();
      document.removeEventListener("keydown", escHandler);
    }
  };
  document.addEventListener("keydown", escHandler);
};

// Logout function - explicitly attach to window for onclick handlers
window.logout = async function (skipConfirm = false) {
  if (!skipConfirm) {
    window.showLogoutConfirm(async () => {
      await performLogout();
    });
    return;
  }

  await performLogout();
};

// CRITICAL: Global function for inline onclick="logout()" handlers
// This must be at global scope so inline onclick can find it
function logout(skipConfirm = false) {
  window.logout(skipConfirm);
}

// Actual logout logic
async function performLogout() {
  try {
    const response = await fetch("/api/admin/logout", {
      method: "POST",
      credentials: "include",
    });

    if (response.ok) {
      window.adminAuth.user = null;
      window.adminAuth.isAuthenticated = false;
      window.location.href = "/admin/login.html";
    } else {
      console.error("Logout failed with status:", response.status);
      // Still redirect to login even if logout fails
      window.location.href = "/admin/login.html";
    }
  } catch (error) {
    console.error("Logout error:", error);
    // Still redirect to login even if logout fails
    window.location.href = "/admin/login.html";
  }
}

// Show success notification
window.showSuccess = function (message) {
  const alert = document.createElement("div");
  alert.className =
    "alert alert-success alert-dismissible fade show position-fixed";
  alert.style.cssText =
    "top: 20px; right: 20px; z-index: 9999; min-width: 300px;";
  alert.innerHTML = `
    ${message}
    <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
  `;
  document.body.appendChild(alert);
  setTimeout(() => alert.remove(), 5000);
};

// Show error notification
window.showError = function (message) {
  const alert = document.createElement("div");
  alert.className =
    "alert alert-danger alert-dismissible fade show position-fixed";
  alert.style.cssText =
    "top: 20px; right: 20px; z-index: 9999; min-width: 300px;";
  alert.innerHTML = `
    ${message}
    <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
  `;
  document.body.appendChild(alert);
  setTimeout(() => alert.remove(), 5000);
};

// Auto-check authentication when this script loads
// Only run if we're not on the login page
if (window.location.pathname !== "/admin/login.html") {
  document.addEventListener("DOMContentLoaded", function () {
    window.checkAuth();

    // Attach logout event listeners to all logout buttons
    const logoutButtons = document.querySelectorAll(
      '.btn-logout, [data-logout], [onclick*="logout"]'
    );
    logoutButtons.forEach((button) => {
      // Remove inline onclick if it exists
      button.removeAttribute("onclick");

      // Add proper event listener
      button.addEventListener("click", function (e) {
        e.preventDefault();
        e.stopPropagation();

        window.logout();
      });
    });
  });
}