// Console-based authentication
window.login = async (password) => {
  if (!password) {
    console.error('Usage: login("your-password")');
    return;
  }
  try {
    const res = await fetch("/api/auth/login", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ password }),
    });
    const data = await res.json();
    if (res.ok) {
      console.log(
        data.firstTime
          ? "Password set! Reloading..."
          : "Logged in! Reloading...",
      );
      setTimeout(() => location.reload(), 500);
    } else {
      console.error(data.error || "Login failed");
    }
  } catch (err) {
    console.error("Login error:", err);
  }
};

window.logout = async () => {
  try {
    await fetch("/api/auth/logout", { method: "POST" });
    console.log("Logged out! Reloading...");
    setTimeout(() => location.reload(), 500);
  } catch (err) {
    console.error("Logout error:", err);
  }
};

// Modal functions
function showAddModal() {
  document.getElementById("add-modal").classList.add("active");
}

function hideAddModal() {
  document.getElementById("add-modal").classList.remove("active");
}

function showEditModal() {
  document.getElementById("edit-modal").classList.add("active");
}

function hideEditModal() {
  document.getElementById("edit-modal").classList.remove("active");
}

// Tab switching
document.addEventListener("DOMContentLoaded", () => {
  const tabs = document.querySelectorAll(".modal-tabs .tab");
  tabs.forEach((tab) => {
    tab.addEventListener("click", () => {
      const tabId = tab.dataset.tab;

      // Update tab buttons
      tabs.forEach((t) => t.classList.remove("active"));
      tab.classList.add("active");

      // Update tab content
      document
        .querySelectorAll(".tab-content")
        .forEach((c) => c.classList.remove("active"));
      document.getElementById("tab-" + tabId).classList.add("active");
    });
  });

  // URL preview on input
  const urlInput = document.querySelector('#link-form input[name="url"]');
  if (urlInput) {
    let debounceTimer;
    urlInput.addEventListener("input", (e) => {
      clearTimeout(debounceTimer);
      debounceTimer = setTimeout(() => fetchPreview(e.target.value), 500);
    });
  }

  // Gallery hover cycling
  const galleries = document.querySelectorAll('.grid-item-images[data-gallery="true"]');
  galleries.forEach((gallery) => {
    const images = gallery.querySelectorAll('img');
    const indicator = gallery.parentElement.querySelector('.gallery-indicator');
    if (images.length < 2) return;

    let currentIndex = 0;
    let cycleInterval = null;

    const showImage = (index) => {
      images.forEach((img, i) => {
        img.classList.toggle('active', i === index);
      });
      if (indicator) {
        indicator.textContent = `${index + 1}/${images.length}`;
      }
    };

    const startCycling = () => {
      if (cycleInterval) return;
      cycleInterval = setInterval(() => {
        currentIndex = (currentIndex + 1) % images.length;
        showImage(currentIndex);
      }, 2000);
    };

    const stopCycling = () => {
      if (cycleInterval) {
        clearInterval(cycleInterval);
        cycleInterval = null;
      }
      // Reset to first image
      currentIndex = 0;
      showImage(0);
    };

    gallery.parentElement.addEventListener('mouseenter', startCycling);
    gallery.parentElement.addEventListener('mouseleave', stopCycling);
  });
});

// Fetch URL preview
async function fetchPreview(url) {
  const preview = document.getElementById("link-preview");
  if (!url) {
    preview.classList.remove("active");
    preview.innerHTML = "";
    return;
  }

  try {
    const res = await fetch("/api/preview", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ url }),
    });

    if (!res.ok) {
      const data = await res.json();
      preview.innerHTML = `<div class="preview-error">${data.error || "Failed to fetch preview"}</div>`;
      preview.classList.add("active");
      return;
    }

    const data = await res.json();
    preview.dataset.preview = JSON.stringify(data);

    let html = "";
    if (data.imageUrl) {
      html += `<img src="${escapeHtml(data.imageUrl)}" alt="Preview">`;
    }
    if (data.title) {
      html += `<div class="preview-title">${escapeHtml(data.title)}</div>`;
    }
    if (data.description) {
      html += `<div class="preview-description">${escapeHtml(data.description)}</div>`;
    }
    if (data.isEmbed) {
      html += `<div class="preview-badge">${escapeHtml(data.provider.toUpperCase())} VIDEO</div>`;
    }

    preview.innerHTML = html || "<div>No preview available</div>";
    preview.classList.add("active");

    // Auto-fill title if empty
    const titleInput = document.querySelector('#link-form input[name="title"]');
    if (titleInput && !titleInput.value && data.title) {
      titleInput.value = data.title;
    }

    // Auto-fill description if empty
    const descriptionInput = document.querySelector(
      '#link-form textarea[name="description"]',
    );
    if (descriptionInput && !descriptionInput.value && data.description) {
      descriptionInput.value = data.description;
    }
  } catch (err) {
    console.error("Preview error:", err);
    preview.innerHTML =
      '<div class="preview-error">Failed to fetch preview</div>';
    preview.classList.add("active");
  }
}

// Submit link form
async function submitLink(event) {
  event.preventDefault();
  const form = event.target;
  const url = form.url.value;
  const tags = form.tags.value
    ? form.tags.value
        .split(",")
        .map((t) => t.trim())
        .filter(Boolean)
    : [];

  // Get preview data
  const preview = document.getElementById("link-preview");
  const previewData = preview.dataset.preview
    ? JSON.parse(preview.dataset.preview)
    : {};

  // Use form values, falling back to preview data
  const title = form.title.value || previewData.title || null;
  const description = form.description.value || previewData.description || null;

  try {
    const body = {
      url,
      title,
      description,
      tags,
      imageUrl: previewData.imageUrl || null,
    };

    if (previewData.isEmbed) {
      body.provider = previewData.provider;
      body.videoId = previewData.videoId;
      body.embedHtml = previewData.embedHtml;
    }

    const res = await fetch("/api/items/from-link", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(body),
    });

    if (res.ok) {
      location.reload();
    } else {
      const data = await res.json();
      alert(data.error || "Failed to add item");
    }
  } catch (err) {
    console.error("Submit error:", err);
    alert("Failed to add item");
  }

  return false;
}

// Submit upload form
async function submitUpload(event) {
  event.preventDefault();
  const form = event.target;
  const formData = new FormData(form);

  try {
    const res = await fetch("/api/items/upload", {
      method: "POST",
      body: formData,
    });

    if (res.ok) {
      location.reload();
    } else {
      const data = await res.json();
      alert(data.error || "Failed to upload");
    }
  } catch (err) {
    console.error("Upload error:", err);
    alert("Failed to upload");
  }

  return false;
}

// Submit quote form
async function submitQuote(event) {
  event.preventDefault();
  const form = event.target;
  const text = form.text.value;
  const source = form.source.value || null;
  const sourceUrl = form.sourceUrl.value || null;
  const tags = form.tags.value
    ? form.tags.value
        .split(",")
        .map((t) => t.trim())
        .filter(Boolean)
    : [];

  try {
    const res = await fetch("/api/items/quote", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ text, source, sourceUrl, tags }),
    });

    if (res.ok) {
      location.reload();
    } else {
      const data = await res.json();
      alert(data.error || "Failed to add quote");
    }
  } catch (err) {
    console.error("Submit error:", err);
    alert("Failed to add quote");
  }

  return false;
}

// Edit item
function editItem(id) {
  showEditModal();
}

// Submit edit form
async function submitEdit(event) {
  event.preventDefault();
  const form = event.target;
  const id = form.id.value;
  const title = form.title.value || null;
  const description = form.description.value || null;
  const linkUrl = form.linkUrl.value || null;
  const tags = form.tags.value
    ? form.tags.value
        .split(",")
        .map((t) => t.trim())
        .filter(Boolean)
    : [];

  try {
    const res = await fetch(`/api/items/${id}`, {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ title, description, linkUrl, tags }),
    });

    if (res.ok) {
      location.reload();
    } else {
      const data = await res.json();
      alert(data.error || "Failed to update");
    }
  } catch (err) {
    console.error("Update error:", err);
    alert("Failed to update");
  }

  return false;
}

// Refresh metadata
async function refreshMetadata(id) {
  try {
    // Fetch current item data
    const itemRes = await fetch(`/api/items/${id}`);
    if (!itemRes.ok) {
      alert("Failed to fetch item");
      return;
    }
    const item = await itemRes.json();

    if (!item.linkUrl) {
      alert("Item has no link URL");
      return;
    }

    // Fetch fresh metadata
    const previewRes = await fetch("/api/preview", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ url: item.linkUrl }),
    });
    if (!previewRes.ok) {
      const data = await previewRes.json();
      alert(data.error || "Failed to fetch metadata");
      return;
    }
    const preview = await previewRes.json();

    // Check if user has made manual edits
    const titleChanged =
      item.title && preview.title && item.title !== preview.title;
    const descChanged =
      item.description &&
      preview.description &&
      item.description !== preview.description;
    const imageChanged =
      item.thumbnailSourceUrl &&
      preview.imageUrl &&
      item.thumbnailSourceUrl !== preview.imageUrl;

    if (titleChanged || descChanged || imageChanged) {
      let msg = "This will overwrite your changes:\n";
      if (titleChanged) msg += `\nTitle: "${item.title}" → "${preview.title}"`;
      if (descChanged) msg += `\nDescription will be replaced`;
      if (imageChanged) msg += `\nImage will be replaced`;
      msg += "\n\nContinue?";

      if (!confirm(msg)) return;
    }

    // Proceed with refresh
    const res = await fetch(`/api/items/${id}/refresh`, { method: "POST" });

    if (res.ok) {
      location.reload();
    } else {
      const data = await res.json();
      alert(data.error || "Failed to refresh");
    }
  } catch (err) {
    console.error("Refresh error:", err);
    alert("Failed to refresh");
  }
}

// Replace media
async function submitReplaceMedia(event, id) {
  event.preventDefault();
  const form = event.target;
  const formData = new FormData(form);

  try {
    const res = await fetch(`/api/items/${id}/media`, {
      method: "POST",
      body: formData,
    });

    if (res.ok) {
      location.reload();
    } else {
      const data = await res.json();
      alert(data.error || "Failed to replace media");
    }
  } catch (err) {
    console.error("Replace media error:", err);
    alert("Failed to replace media");
  }

  return false;
}

// Delete item
async function deleteItem(id) {
  if (!confirm("Delete this item?")) return;

  try {
    const res = await fetch(`/api/items/${id}`, { method: "DELETE" });

    if (res.ok) {
      location.href = "/";
    } else {
      const data = await res.json();
      alert(data.error || "Failed to delete");
    }
  } catch (err) {
    console.error("Delete error:", err);
    alert("Failed to delete");
  }
}

// Play video (initial click to start)
function playVideo(overlay) {
  const container = overlay.parentElement;
  const video = container.querySelector("video");
  if (video) {
    video.play();
    overlay.remove();
    // Show controls on hover
    video.addEventListener("mouseenter", () => (video.controls = true));
    video.addEventListener("mouseleave", () => (video.controls = false));
  }
}

// Utility
function escapeHtml(str) {
  const div = document.createElement("div");
  div.textContent = str;
  return div.innerHTML;
}