/**
 * PostsList — Creator post management page.
 *
 * Shows all posts (draft + published) with edit, delete, and status controls.
 * Protected route at /creator/posts.
 */

import { useEffect, useState } from "react";
import { Link } from "react-router-dom";
import { useDocumentTitle } from "../hooks/useDocumentTitle";
import { listPosts, deletePost, type PostRead } from "../api/posts";
import { useAuth } from "../context/AuthContext";
import { SidebarNav } from "./CreatorDashboard";
import styles from "./PostsList.module.css";

function formatDate(iso: string): string {
  return new Date(iso).toLocaleDateString(undefined, {
    year: "numeric",
    month: "short",
    day: "numeric",
  });
}

export default function PostsList() {
  useDocumentTitle("My Posts — Chrysopedia");
  const { user } = useAuth();

  const [posts, setPosts] = useState<PostRead[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  // Delete confirmation
  const [confirmDelete, setConfirmDelete] = useState<PostRead | null>(null);
  const [deleting, setDeleting] = useState(false);

  useEffect(() => {
    if (!user?.creator_id) return;
    let cancelled = false;
    setLoading(true);
    setError(null);

    listPosts(String(user.creator_id), 1, 100)
      .then((res) => {
        if (!cancelled) setPosts(res.items);
      })
      .catch((err) => {
        if (!cancelled) setError(err instanceof Error ? err.message : "Failed to load posts");
      })
      .finally(() => {
        if (!cancelled) setLoading(false);
      });

    return () => { cancelled = true; };
  }, [user?.creator_id]);

  async function handleDelete() {
    if (!confirmDelete) return;
    setDeleting(true);
    try {
      await deletePost(String(confirmDelete.id));
      setPosts((prev) => prev.filter((p) => p.id !== confirmDelete.id));
      setConfirmDelete(null);
    } catch (err) {
      console.error("Delete failed:", err);
    } finally {
      setDeleting(false);
    }
  }

  return (
    <div className={styles.layout}>
      <SidebarNav />
      <div className={styles.content}>
        <div className={styles.header}>
          <h1 className={styles.pageTitle}>My Posts</h1>
          <Link to="/creator/posts/new" className={styles.newBtn}>
            + New Post
          </Link>
        </div>

        {loading && <div className={styles.loading}>Loading posts…</div>}

        {!loading && error && <div className={styles.error}>{error}</div>}

        {!loading && !error && posts.length === 0 && (
          <div className={styles.empty}>
            <p>No posts yet. Create your first post to share with followers.</p>
          </div>
        )}

        {!loading && !error && posts.length > 0 && (
          <>
            {/* Desktop table */}
            <div className={styles.tableWrap}>
              <table className={styles.table}>
                <thead>
                  <tr>
                    <th>Title</th>
                    <th>Status</th>
                    <th>Created</th>
                    <th>Actions</th>
                  </tr>
                </thead>
                <tbody>
                  {posts.map((post) => (
                    <tr key={post.id}>
                      <td className={styles.titleCell}>{post.title}</td>
                      <td>
                        <span className={`${styles.badge} ${post.is_published ? styles.badgePublished : styles.badgeDraft}`}>
                          {post.is_published ? "Published" : "Draft"}
                        </span>
                      </td>
                      <td>{formatDate(post.created_at)}</td>
                      <td>
                        <div className={styles.actions}>
                          <Link to={`/creator/posts/${post.id}/edit`} className={styles.editBtn}>
                            Edit
                          </Link>
                          <button
                            className={styles.deleteBtn}
                            onClick={() => setConfirmDelete(post)}
                          >
                            Delete
                          </button>
                        </div>
                      </td>
                    </tr>
                  ))}
                </tbody>
              </table>
            </div>

            {/* Mobile cards */}
            <div className={styles.mobileCards}>
              {posts.map((post) => (
                <div key={post.id} className={styles.mobileCard}>
                  <span className={styles.mobileCardTitle}>{post.title}</span>
                  <div className={styles.mobileCardMeta}>
                    <span className={`${styles.badge} ${post.is_published ? styles.badgePublished : styles.badgeDraft}`}>
                      {post.is_published ? "Published" : "Draft"}
                    </span>
                    <span>{formatDate(post.created_at)}</span>
                  </div>
                  <div className={styles.mobileCardActions}>
                    <Link to={`/creator/posts/${post.id}/edit`} className={styles.editBtn}>
                      Edit
                    </Link>
                    <button
                      className={styles.deleteBtn}
                      onClick={() => setConfirmDelete(post)}
                    >
                      Delete
                    </button>
                  </div>
                </div>
              ))}
            </div>
          </>
        )}

        {/* Delete confirmation dialog */}
        {confirmDelete && (
          <div className={styles.confirmOverlay} onClick={() => !deleting && setConfirmDelete(null)}>
            <div className={styles.confirmDialog} onClick={(e) => e.stopPropagation()}>
              <h3 className={styles.confirmTitle}>Delete Post</h3>
              <p className={styles.confirmText}>
                Are you sure you want to delete "{confirmDelete.title}"? This cannot be undone.
              </p>
              <div className={styles.confirmActions}>
                <button
                  className={styles.confirmCancel}
                  onClick={() => setConfirmDelete(null)}
                  disabled={deleting}
                >
                  Cancel
                </button>
                <button
                  className={styles.confirmDelete}
                  onClick={handleDelete}
                  disabled={deleting}
                >
                  {deleting ? "Deleting…" : "Delete"}
                </button>
              </div>
            </div>
          </div>
        )}
      </div>
    </div>
  );
}