// =====================================================
// Admin Utilities - Shared Functions for Admin Panel
// =====================================================

/**
 * Show a custom confirmation dialog instead of browser confirm()
 * @param {string} message - The confirmation message
 * @param {Function} onConfirm - Callback when confirmed
 * @param {Object} options - Optional configuration
 */
function showDeleteConfirm(message, onConfirm, options = {}) {
  const {
    title = "Confirm Delete",
    confirmText = "Delete",
    cancelText = "Cancel",
    type = "danger",
  } = options;

  // Check if modal already exists, if not create it
  let modal = document.getElementById("adminConfirmModal");
  if (!modal) {
    modal = document.createElement("div");
    modal.id = "adminConfirmModal";
    modal.className = "admin-confirm-modal";
    modal.innerHTML = `
      <div class="admin-confirm-overlay"></div>
      <div class="admin-confirm-dialog">
        <div class="admin-confirm-header">
          <div class="admin-confirm-icon ${type}">
            <i class="bi bi-exclamation-triangle-fill"></i>
          </div>
          <h3 class="admin-confirm-title">${title}</h3>
        </div>
        <div class="admin-confirm-body">
          <p class="admin-confirm-message">${message}</p>
        </div>
        <div class="admin-confirm-footer">
          <button type="button" class="admin-confirm-btn cancel">${cancelText}</button>
          <button type="button" class="admin-confirm-btn confirm ${type}">${confirmText}</button>
        </div>
      </div>
    `;
    document.body.appendChild(modal);

    // Add styles if not already present
    if (!document.getElementById("adminConfirmStyles")) {
      const styles = document.createElement("style");
      styles.id = "adminConfirmStyles";
      styles.textContent = `
        .admin-confirm-modal {
          position: fixed;
          top: 0;
          left: 0;
          right: 0;
          bottom: 0;
          z-index: 10000;
          display: flex;
          align-items: center;
          justify-content: center;
          opacity: 0;
          visibility: hidden;
          transition: all 0.2s ease;
        }
        .admin-confirm-modal.show {
          opacity: 1;
          visibility: visible;
        }
        .admin-confirm-overlay {
          position: absolute;
          top: 0;
          left: 0;
          right: 0;
          bottom: 0;
          background: rgba(0, 0, 0, 0.5);
          backdrop-filter: blur(4px);
        }
        .admin-confirm-dialog {
          position: relative;
          background: white;
          border-radius: 16px;
          box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
          max-width: 400px;
          width: 90%;
          transform: scale(0.9) translateY(-20px);
          transition: transform 0.2s ease;
          overflow: hidden;
        }
        .admin-confirm-modal.show .admin-confirm-dialog {
          transform: scale(1) translateY(0);
        }
        .admin-confirm-header {
          padding: 24px 24px 16px;
          text-align: center;
        }
        .admin-confirm-icon {
          width: 60px;
          height: 60px;
          border-radius: 50%;
          display: flex;
          align-items: center;
          justify-content: center;
          margin: 0 auto 16px;
          font-size: 28px;
        }
        .admin-confirm-icon.danger {
          background: #fee2e2;
          color: #dc2626;
        }
        .admin-confirm-icon.warning {
          background: #fef3c7;
          color: #d97706;
        }
        .admin-confirm-icon.info {
          background: #dbeafe;
          color: #2563eb;
        }
        .admin-confirm-title {
          margin: 0;
          font-size: 1.25rem;
          font-weight: 600;
          color: #1a1a2e;
        }
        .admin-confirm-body {
          padding: 0 24px 20px;
          text-align: center;
        }
        .admin-confirm-message {
          margin: 0;
          color: #666;
          font-size: 0.95rem;
          line-height: 1.5;
        }
        .admin-confirm-footer {
          display: flex;
          gap: 12px;
          padding: 16px 24px 24px;
          justify-content: center;
        }
        .admin-confirm-btn {
          padding: 10px 24px;
          border-radius: 8px;
          font-weight: 500;
          font-size: 0.9rem;
          cursor: pointer;
          transition: all 0.2s ease;
          border: none;
        }
        .admin-confirm-btn.cancel {
          background: #f3f4f6;
          color: #374151;
        }
        .admin-confirm-btn.cancel:hover {
          background: #e5e7eb;
        }
        .admin-confirm-btn.confirm {
          color: white;
        }
        .admin-confirm-btn.confirm.danger {
          background: #dc2626;
        }
        .admin-confirm-btn.confirm.danger:hover {
          background: #b91c1c;
        }
        .admin-confirm-btn.confirm.warning {
          background: #d97706;
        }
        .admin-confirm-btn.confirm.warning:hover {
          background: #b45309;
        }
        .admin-confirm-btn.confirm.info {
          background: #2563eb;
        }
        .admin-confirm-btn.confirm.info:hover {
          background: #1d4ed8;
        }
      `;
      document.head.appendChild(styles);
    }
  } else {
    // Update existing modal content
    modal.querySelector(
      ".admin-confirm-icon"
    ).className = `admin-confirm-icon ${type}`;
    modal.querySelector(".admin-confirm-title").textContent = title;
    modal.querySelector(".admin-confirm-message").textContent = message;
    modal.querySelector(".admin-confirm-btn.confirm").textContent = confirmText;
    modal.querySelector(
      ".admin-confirm-btn.confirm"
    ).className = `admin-confirm-btn confirm ${type}`;
    modal.querySelector(".admin-confirm-btn.cancel").textContent = cancelText;
  }

  // Show modal
  requestAnimationFrame(() => {
    modal.classList.add("show");
  });

  // Get buttons
  const confirmBtn = modal.querySelector(".admin-confirm-btn.confirm");
  const cancelBtn = modal.querySelector(".admin-confirm-btn.cancel");
  const overlay = modal.querySelector(".admin-confirm-overlay");

  // Close function
  const closeModal = () => {
    modal.classList.remove("show");
  };

  // Remove old listeners by cloning
  const newConfirmBtn = confirmBtn.cloneNode(true);
  const newCancelBtn = cancelBtn.cloneNode(true);
  confirmBtn.parentNode.replaceChild(newConfirmBtn, confirmBtn);
  cancelBtn.parentNode.replaceChild(newCancelBtn, cancelBtn);

  // Add new listeners
  newConfirmBtn.addEventListener("click", () => {
    closeModal();
    onConfirm();
  });

  newCancelBtn.addEventListener("click", closeModal);
  overlay.addEventListener("click", closeModal);

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

/**
 * Show a success notification toast
 * @param {string} message - The success message
 */
function showAdminToast(message, type = "success") {
  // Create toast container if it doesn't exist
  let container = document.getElementById("adminToastContainer");
  if (!container) {
    container = document.createElement("div");
    container.id = "adminToastContainer";
    container.style.cssText = `
      position: fixed;
      top: 20px;
      right: 20px;
      z-index: 10001;
      display: flex;
      flex-direction: column;
      gap: 10px;
    `;
    document.body.appendChild(container);
  }

  const toast = document.createElement("div");
  toast.style.cssText = `
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    transform: translateX(120%);
    transition: transform 0.3s ease;
    min-width: 280px;
    border-left: 4px solid ${
      type === "success" ? "#10b981" : type === "error" ? "#ef4444" : "#3b82f6"
    };
  `;

  const icons = {
    success:
      '<i class="bi bi-check-circle-fill" style="color: #10b981; font-size: 1.25rem;"></i>',
    error:
      '<i class="bi bi-x-circle-fill" style="color: #ef4444; font-size: 1.25rem;"></i>',
    info: '<i class="bi bi-info-circle-fill" style="color: #3b82f6; font-size: 1.25rem;"></i>',
  };

  toast.innerHTML = `
    ${icons[type] || icons.info}
    <span style="flex: 1; color: #374151; font-size: 0.9rem;">${message}</span>
  `;

  container.appendChild(toast);

  // Animate in
  requestAnimationFrame(() => {
    toast.style.transform = "translateX(0)";
  });

  // Auto remove after 4 seconds
  setTimeout(() => {
    toast.style.transform = "translateX(120%)";
    setTimeout(() => {
      toast.remove();
    }, 300);
  }, 4000);
}

/**
 * Notify frontend that data has changed
 * This updates a timestamp in localStorage that frontend pages check
 * @param {string} dataType - Type of data changed (products, pages, settings, etc.)
 */
function notifyFrontendChange(dataType = "all") {
  const timestamp = Date.now();
  const changeKey = `skyartshop_change_${dataType}`;

  // Store in localStorage for cross-tab communication
  localStorage.setItem(changeKey, timestamp.toString());
  localStorage.setItem("skyartshop_last_change", timestamp.toString());

  // Also broadcast to any open frontend tabs via BroadcastChannel
  try {
    const channel = new BroadcastChannel("skyartshop_updates");
    channel.postMessage({ type: dataType, timestamp });
    channel.close();
  } catch (e) {
    // BroadcastChannel not supported in some browsers
  }

  console.log(`[Admin] Notified frontend of ${dataType} change`);
}

// Export for use in other files
window.showDeleteConfirm = showDeleteConfirm;
window.showAdminToast = showAdminToast;
window.notifyFrontendChange = notifyFrontendChange;