// Blog Management JavaScript

let postsData = [];
let postModal;
let quillEditor;
let isModalExpanded = false;

document.addEventListener("DOMContentLoaded", function () {
  postModal = new bootstrap.Modal(document.getElementById("postModal"));
  initializeQuillEditor();
  checkAuth().then((authenticated) => {
    if (authenticated) {
      loadPosts();
    }
  });

  const urlParams = new URLSearchParams(window.location.search);
  if (urlParams.get("action") === "create") {
    showCreatePost();
  }

  // Auto-generate slug from title
  document.getElementById("postTitle")?.addEventListener("input", function () {
    if (!document.getElementById("postId").value) {
      document.getElementById("postSlug").value = slugify(this.value);
    }
  });
});

function resetModalSize() {
  const modalDialog = document.querySelector("#postModal .modal-dialog");
  const expandIcon = document.getElementById("expandIcon");
  const expandText = document.querySelector("#btnExpandModal span");
  const editor = document.getElementById("postContentEditor");

  if (modalDialog && expandIcon && expandText && editor) {
    modalDialog.classList.remove("modal-fullscreen");
    modalDialog.classList.add("modal-xl");
    expandIcon.className = "bi bi-arrows-fullscreen";
    expandText.textContent = "Expand";
    editor.style.height = "400px";
    const container = editor.querySelector(".ql-container");
    if (container) {
      container.style.height = "calc(400px - 42px)";
    }
    isModalExpanded = false;
  }
}

function toggleModalSize() {
  const modalDialog = document.querySelector("#postModal .modal-dialog");
  const expandIcon = document.getElementById("expandIcon");
  const expandText = document.querySelector("#btnExpandModal span");
  const editor = document.getElementById("postContentEditor");

  if (!modalDialog || !expandIcon || !expandText || !editor) {
    console.error("Modal elements not found");
    return;
  }

  if (isModalExpanded) {
    // Collapse to normal size
    modalDialog.classList.remove("modal-fullscreen");
    modalDialog.classList.add("modal-xl");
    expandIcon.className = "bi bi-arrows-fullscreen";
    expandText.textContent = "Expand";
    editor.style.height = "400px";
    const container = editor.querySelector(".ql-container");
    if (container) {
      container.style.height = "calc(400px - 42px)";
    }
    isModalExpanded = false;
  } else {
    // Expand to fullscreen
    modalDialog.classList.remove("modal-xl");
    modalDialog.classList.add("modal-fullscreen");
    expandIcon.className = "bi bi-fullscreen-exit";
    expandText.textContent = "Collapse";
    editor.style.height = "60vh";
    const container = editor.querySelector(".ql-container");
    if (container) {
      container.style.height = "calc(60vh - 42px)";
    }
    isModalExpanded = true;
  }
}

function initializeQuillEditor() {
  quillEditor = new Quill("#postContentEditor", {
    theme: "snow",
    placeholder: "Write your blog post content here...",
    modules: {
      toolbar: [
        [{ header: [1, 2, 3, false] }],
        ["bold", "italic", "underline", "strike"],
        [{ list: "ordered" }, { list: "bullet" }],
        [{ color: [] }, { background: [] }],
        ["link", "image"],
        ["blockquote", "code-block"],
        ["clean"],
      ],
    },
  });
}

function openMediaLibraryForFeaturedImage() {
  // Create modal backdrop
  const backdrop = document.createElement("div");
  backdrop.id = "mediaLibraryBackdrop";
  backdrop.style.cssText = `
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
  `;

  // Create modal container
  const modal = document.createElement("div");
  modal.id = "mediaLibraryModal";
  modal.style.cssText = `
    position: relative;
    width: 90%;
    max-width: 1200px;
    height: 85vh;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
  `;

  // Create close button
  const closeBtn = document.createElement("button");
  closeBtn.innerHTML = '<i class="bi bi-x-lg"></i>';
  closeBtn.style.cssText = `
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 10000;
    background: #dc3545;
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
  `;
  closeBtn.onclick = closeMediaLibrary;

  // Create iframe
  const iframe = document.createElement("iframe");
  iframe.id = "mediaLibraryFrame";
  iframe.src = "/admin/media-library.html?selectMode=true";
  iframe.style.cssText = `
    width: 100%;
    height: 100%;
    border: none;
  `;

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

  // Close on backdrop click
  backdrop.onclick = function (e) {
    if (e.target === backdrop) {
      closeMediaLibrary();
    }
  };

  // Setup media selection handler
  window.handleMediaSelection = function (media) {
    const mediaItem = Array.isArray(media) ? media[0] : media;
    if (mediaItem && mediaItem.url) {
      document.getElementById("postFeaturedImage").value = mediaItem.url;
      updateFeaturedImagePreview(mediaItem.url);
      showToast("Featured image selected", "success");
    }
    closeMediaLibrary();
  };
}

function closeMediaLibrary() {
  const backdrop = document.getElementById("mediaLibraryBackdrop");
  if (backdrop) {
    backdrop.remove();
  }
}

function updateFeaturedImagePreview(url) {
  const preview = document.getElementById("featuredImagePreview");
  if (url) {
    preview.innerHTML = `
      <div style="position: relative; display: inline-block;">
        <img src="${url}" style="max-width: 200px; max-height: 150px; border-radius: 8px; border: 2px solid #e0e0e0;" />
        <button type="button" onclick="removeFeaturedImage()" style="position: absolute; top: -8px; right: -8px; background: #dc3545; color: white; border: none; border-radius: 50%; width: 24px; height: 24px; cursor: pointer; font-size: 14px;">&times;</button>
      </div>
    `;
  } else {
    preview.innerHTML = "";
  }
}

function removeFeaturedImage() {
  document.getElementById("postFeaturedImage").value = "";
  updateFeaturedImagePreview("");
  showToast("Featured image removed", "info");
}

async function loadPosts() {
  try {
    const response = await fetch("/api/admin/blog", { credentials: "include" });
    const data = await response.json();
    console.log("Blog API Response:", data);
    if (data.success) {
      postsData = data.posts;
      console.log("Loaded posts:", postsData);
      renderPosts(postsData);
    } else {
      console.error("API returned success=false:", data);
      const tbody = document.getElementById("postsTableBody");
      tbody.innerHTML = `
        <tr><td colspan="7" class="text-center p-4 text-danger">
          <i class="bi bi-exclamation-triangle" style="font-size: 3rem;"></i>
          <p class="mt-3">Failed to load posts: ${
            data.message || "Unknown error"
          }</p>
        </td></tr>`;
    }
  } catch (error) {
    console.error("Failed to load posts:", error);
    const tbody = document.getElementById("postsTableBody");
    tbody.innerHTML = `
      <tr><td colspan="7" class="text-center p-4 text-danger">
        <i class="bi bi-exclamation-triangle" style="font-size: 3rem;"></i>
        <p class="mt-3">Error loading posts. Please refresh the page.</p>
      </td></tr>`;
  }
}

function renderPosts(posts) {
  const tbody = document.getElementById("postsTableBody");
  if (posts.length === 0) {
    tbody.innerHTML = `
      <tr><td colspan="7" class="text-center p-4">
        <i class="bi bi-inbox" style="font-size: 3rem; color: #ccc;"></i>
        <p class="mt-3 text-muted">No blog posts found</p>
        <button class="btn btn-primary" onclick="showCreatePost()">
          <i class="bi bi-plus-circle"></i> Create Your First Post
        </button>
      </td></tr>`;
    return;
  }

  tbody.innerHTML = posts
    .map(
      (p) => `
    <tr>
      <td>${escapeHtml(String(p.id))}</td>
      <td><strong>${escapeHtml(p.title)}</strong></td>
      <td><code>${escapeHtml(p.slug)}</code></td>
      <td>${escapeHtml((p.excerpt || "").substring(0, 40))}...</td>
      <td><span class="badge ${
        p.ispublished ? "bg-success text-white" : "bg-warning text-dark"
      }">
        ${p.ispublished ? "Published" : "Draft"}</span></td>
      <td>${formatDate(p.createdat)}</td>
      <td>
        <button class="btn btn-sm btn-info" onclick="editPost('${escapeHtml(
          String(p.id)
        )}')">
          <i class="bi bi-pencil"></i>
        </button>
        <button class="btn btn-sm btn-danger" onclick="deletePost('${escapeHtml(
          String(p.id)
        )}', '${escapeHtml(p.title).replace(/'/g, "&#39;")}')">
          <i class="bi bi-trash"></i>
        </button>
      </td>
    </tr>`
    )
    .join("");
}

function filterPosts() {
  const searchTerm = document.getElementById("searchInput").value.toLowerCase();
  const filtered = postsData.filter(
    (p) =>
      p.title.toLowerCase().includes(searchTerm) ||
      p.slug.toLowerCase().includes(searchTerm)
  );
  renderPosts(filtered);
}

function showCreatePost() {
  document.getElementById("modalTitle").textContent = "Create Blog Post";
  document.getElementById("postForm").reset();
  document.getElementById("postId").value = "";
  document.getElementById("postPublished").checked = false;
  document.getElementById("postFeaturedImage").value = "";
  updateFeaturedImagePreview("");
  if (quillEditor) {
    quillEditor.setContents([]);
  }
  resetModalSize();
  postModal.show();
}

async function editPost(id) {
  try {
    const response = await fetch(`/api/admin/blog/${id}`, {
      credentials: "include",
    });
    const data = await response.json();
    if (data.success) {
      const post = data.post;
      document.getElementById("modalTitle").textContent = "Edit Blog Post";
      document.getElementById("postId").value = post.id;
      document.getElementById("postTitle").value = post.title;
      document.getElementById("postSlug").value = post.slug;
      document.getElementById("postExcerpt").value = post.excerpt || "";

      // Set Quill content
      if (quillEditor) {
        quillEditor.root.innerHTML = post.content || "";
      }

      // Set featured image
      const featuredImage = post.featuredimage || post.imageurl || "";
      document.getElementById("postFeaturedImage").value = featuredImage;
      updateFeaturedImagePreview(featuredImage);

      document.getElementById("postMetaTitle").value = post.metatitle || "";
      document.getElementById("postMetaDescription").value =
        post.metadescription || "";
      document.getElementById("postPublished").checked = post.ispublished;
      resetModalSize();
      postModal.show();
    }
  } catch (error) {
    console.error("Failed to load post:", error);
    showToast("Failed to load post details", "error");
  }
}

async function savePost() {
  const id = document.getElementById("postId").value;

  // Get content from Quill editor
  const content = quillEditor ? quillEditor.root.innerHTML : "";

  const formData = {
    title: document.getElementById("postTitle").value,
    slug: document.getElementById("postSlug").value,
    excerpt: document.getElementById("postExcerpt").value,
    content: content,
    featuredimage: document.getElementById("postFeaturedImage").value,
    metatitle: document.getElementById("postMetaTitle").value,
    metadescription: document.getElementById("postMetaDescription").value,
    ispublished: document.getElementById("postPublished").checked,
  };

  if (!formData.title || !formData.slug || !formData.content) {
    showToast("Please fill in all required fields", "error");
    return;
  }

  try {
    const url = id ? `/api/admin/blog/${id}` : "/api/admin/blog";
    const method = id ? "PUT" : "POST";
    const response = await fetch(url, {
      method: method,
      headers: { "Content-Type": "application/json" },
      credentials: "include",
      body: JSON.stringify(formData),
    });

    const data = await response.json();
    if (data.success) {
      showToast(
        id ? "Post updated successfully" : "Post created successfully",
        "success"
      );
      postModal.hide();
      loadPosts();
    } else {
      showToast(data.message || "Failed to save post", "error");
    }
  } catch (error) {
    console.error("Failed to save post:", error);
    showToast("Failed to save post", "error");
  }
}

async function deletePost(id, title) {
  if (!confirm(`Are you sure you want to delete "${title}"?`)) return;
  try {
    const response = await fetch(`/api/admin/blog/${id}`, {
      method: "DELETE",
      credentials: "include",
    });
    const data = await response.json();
    if (data.success) {
      showToast("Post deleted successfully", "success");
      loadPosts();
    } else {
      showToast(data.message || "Failed to delete post", "error");
    }
  } catch (error) {
    console.error("Failed to delete post:", error);
    showToast("Failed to delete post", "error");
  }
}

function showToast(message, type = "info") {
  const toastContainer =
    document.getElementById("toastContainer") || createToastContainer();
  const toast = document.createElement("div");
  toast.className = `toast toast-${type}`;

  const icons = {
    success: "check-circle-fill",
    error: "exclamation-triangle-fill",
    warning: "exclamation-circle-fill",
    info: "info-circle-fill",
  };

  toast.innerHTML = `
    <i class="bi bi-${icons[type] || icons.info}"></i>
    <span>${message}</span>
  `;

  toastContainer.appendChild(toast);

  setTimeout(() => toast.classList.add("show"), 10);
  setTimeout(() => {
    toast.classList.remove("show");
    setTimeout(() => toast.remove(), 300);
  }, 3000);
}

function createToastContainer() {
  const container = document.createElement("div");
  container.id = "toastContainer";
  container.style.cssText =
    "position: fixed; top: 80px; right: 20px; z-index: 9999;";
  document.body.appendChild(container);
  return container;
}

function slugify(text) {
  return text
    .toLowerCase()
    .replace(/[^\w\s-]/g, "")
    .replace(/[\s_-]+/g, "-")
    .replace(/^-+|-+$/g, "");
}

function escapeHtml(text) {
  const map = {
    "&": "&amp;",
    "<": "&lt;",
    ">": "&gt;",
    '"': "&quot;",
    "'": "&#039;",
  };
  return text.replace(/[&<>"']/g, (m) => map[m]);
}

function formatDate(dateString) {
  return new Date(dateString).toLocaleDateString("en-US", {
    year: "numeric",
    month: "short",
    day: "numeric",
  });
}