"use client";

import Link from "next/link";
import { useRouter } from "next/navigation";
import { useEffect, useState } from "react";
import CategoryTreeSelect from "@/components/CategoryTreeSelect";
import {
  FeaturedImageField,
  TagsField,
  type LocalImage,
} from "@/components/catalog/CatalogFormFields";
import RichTextArea from "@/components/RichTextArea";
import type { MeshkeeCategory } from "@/services/meshkee-categories";
import { uploadWebsiteMedia } from "@/services/website-media";
import {
  createWebsiteBlogPost,
  listWebsiteBlogCategories,
  type WebsiteBlogCategory,
} from "@/services/website-blog";
import styles from "@/components/catalog/CatalogForm.module.css";
import local from "./WebsiteBlogForm.module.css";

export default function WebsiteBlogForm() {
  const router = useRouter();
  const [categories, setCategories] = useState<WebsiteBlogCategory[]>([]);
  const [categoryId, setCategoryId] = useState("");
  const [title, setTitle] = useState("");
  const [abstract, setAbstract] = useState("");
  const [mainTextHtml, setMainTextHtml] = useState("");
  const [image, setImage] = useState<LocalImage | null>(null);
  const [tags, setTags] = useState<string[]>([]);
  const [saving, setSaving] = useState(false);
  const [error, setError] = useState("");

  useEffect(() => {
    let cancelled = false;
    void (async () => {
      try {
        const items = await listWebsiteBlogCategories();
        if (!cancelled) setCategories(items);
      } catch (err) {
        if (!cancelled) {
          setError(
            err instanceof Error ? err.message : "Could not load categories.",
          );
        }
      }
    })();
    return () => {
      cancelled = true;
    };
  }, []);

  async function onSubmit(event?: React.FormEvent) {
    event?.preventDefault();
    if (!title.trim()) {
      setError("Enter a title.");
      return;
    }

    setSaving(true);
    setError("");
    try {
      if (!categoryId) {
        setError("Choose a category.");
        setSaving(false);
        return;
      }

      let imageUrl: string | undefined;
      if (image?.file) {
        imageUrl = await uploadWebsiteMedia(image.file);
      }

      await createWebsiteBlogPost({
        title: title.trim(),
        categoryId,
        abstract: abstract.trim() || undefined,
        mainTextHtml: mainTextHtml || undefined,
        imageUrl,
        tags,
      });
      router.push("/website/blog");
      router.refresh();
    } catch (err) {
      setError(err instanceof Error ? err.message : "Could not create post.");
    } finally {
      setSaving(false);
    }
  }

  const busy = saving;
  const treeCategories: MeshkeeCategory[] = categories.map((item) => ({
    id: item.id,
    parentId: item.parentId,
    name: item.name,
    nameFa: null,
    slug: "",
    description: null,
    icon: null,
    sortOrder: 0,
    tags: [],
  }));

  return (
    <form className={styles.page} onSubmit={onSubmit}>
      <header className={styles.head}>
        <div>
          <nav className={styles.breadcrumb} aria-label="Breadcrumb">
            <Link href="/">Home</Link>
            <span className={styles.breadcrumbSep} aria-hidden>
              /
            </span>
            <Link href="/website/blog">Blog</Link>
            <span className={styles.breadcrumbSep} aria-hidden>
              /
            </span>
            <span className={styles.breadcrumbCurrent}>Add</span>
          </nav>
          <h1 className={styles.title}>Add blog post</h1>
          <p className={styles.lead}>
            Publish a story on the IranBay website.
          </p>
        </div>
        <div className={styles.headActions}>
          <Link href="/website/blog" className={`outline-btn ${styles.ghostBtn}`}>
            Back
          </Link>
          <button
            type="submit"
            className={`outline-btn ${styles.saveBtn}`}
            disabled={busy}
          >
            {saving ? "Saving…" : "Save"}
          </button>
        </div>
      </header>

      {error ? (
        <div className={styles.errorBox} role="alert">
          {error}
        </div>
      ) : null}

      <div className={styles.layout}>
        <section className={styles.card}>
          <h2 className={styles.sectionTitle}>Post</h2>
          <div className={local.beside}>
            <FeaturedImageField
              label="Image"
              value={image}
              aspect={3 / 2}
              disabled={busy}
              onChange={setImage}
            />
            <div className={styles.stack}>
              <CategoryTreeSelect
                categories={treeCategories}
                value={categoryId ? [categoryId] : []}
                selection="single"
                label="Category"
                placeholder="Select category"
                disabled={busy}
                onChange={(ids) => setCategoryId(ids[0] ?? "")}
              />

              <label className={styles.field}>
                <span>Title</span>
                <input
                  value={title}
                  disabled={busy}
                  required
                  onChange={(event) => setTitle(event.target.value)}
                />
              </label>

              <label className={styles.field}>
                <span>Abstract</span>
                <textarea
                  rows={3}
                  value={abstract}
                  disabled={busy}
                  onChange={(event) => setAbstract(event.target.value)}
                />
              </label>
            </div>
          </div>
        </section>

        <section className={styles.card}>
          <h2 className={styles.sectionTitle}>Content</h2>
          <div className={styles.stack}>
            <div className={styles.richField}>
              <RichTextArea
                label="Main text"
                value={mainTextHtml}
                onChange={setMainTextHtml}
                disabled={busy}
                minHeight={280}
                onUploadImage={uploadWebsiteMedia}
              />
            </div>
            <TagsField tags={tags} disabled={busy} onChange={setTags} />
          </div>
        </section>

        <div className={styles.footerActions}>
          <Link href="/website/blog" className={`outline-btn ${styles.ghostBtn}`}>
            Cancel
          </Link>
          <button
            type="submit"
            className={`outline-btn ${styles.saveBtn}`}
            disabled={busy}
          >
            {saving ? "Saving…" : "Save"}
          </button>
        </div>
      </div>
    </form>
  );
}