const test = require('node:test');
const assert = require('node:assert');
const mangaEpub = require('../library/manga-epub');
const zip = require('../zip');

function img(byte, ext) {
  return { ext: ext || 'jpg', data: Buffer.from([byte, byte, byte]) };
}

test('createMangaEpub: 产出的 zip 含标准 EPUB 骨架与章节旁路索引', () => {
  const { bytes, chapterCount, pageCount } = mangaEpub.createMangaEpub({
    title: '测试漫画',
    mangaId: 'manga-1',
    originalLanguage: 'ja',
    chapterId: 'ch-1',
    label: '第 1 话',
    volume: '1',
    chapter: '1',
    translatedLanguage: 'zh',
    group: '汉化组',
    images: [img(1), img(2), img(3)]
  });
  assert.strictEqual(chapterCount, 1);
  assert.strictEqual(pageCount, 3);

  const entries = zip.readZip(bytes);
  assert.ok(entries.has('mimetype'));
  assert.strictEqual(entries.get('mimetype').toString('utf8'), 'application/epub+zip');
  assert.ok(entries.has('META-INF/container.xml'));
  assert.ok(entries.has('content.opf'));
  assert.ok(entries.has('nav.xhtml'));
  assert.ok(entries.has('images/ch-1/0001.jpg'));
  assert.ok(entries.has('chapters/ch-1/p0001.xhtml'));

  const meta = JSON.parse(entries.get('peoplelib/chapters.json').toString('utf8'));
  assert.strictEqual(meta.mangaId, 'manga-1');
  assert.strictEqual(meta.chapters.length, 1);
  assert.strictEqual(meta.chapters[0].chapterId, 'ch-1');
  assert.strictEqual(meta.chapters[0].pageCount, 3);
});

test('appendMangaChapter: 合并新章节，保留旧章节图片字节不变，按卷/话排序', () => {
  const first = mangaEpub.createMangaEpub({
    title: '测试漫画',
    mangaId: 'manga-1',
    originalLanguage: 'ja',
    chapterId: 'ch-2',
    label: '第 2 话',
    volume: '1',
    chapter: '2',
    images: [img(10)]
  });
  const { bytes } = mangaEpub.appendMangaChapter(first.bytes, {
    title: '测试漫画',
    mangaId: 'manga-1',
    originalLanguage: 'ja',
    chapterId: 'ch-1',
    label: '第 1 话',
    volume: '1',
    chapter: '1',
    images: [img(20), img(21)]
  });

  const entries = zip.readZip(bytes);
  assert.ok(entries.has('images/ch-1/0001.jpg'));
  assert.ok(entries.has('images/ch-2/0001.jpg'));
  // 旧章节图片字节原样保留，未被重新编码
  assert.deepStrictEqual([...entries.get('images/ch-2/0001.jpg')], [10, 10, 10]);

  const list = mangaEpub.listChapters(bytes);
  assert.strictEqual(list.length, 2);
  // 按 volume/chapter 排序：话 1 应排在话 2 前面，尽管是后追加的
  assert.strictEqual(list[0].chapterId, 'ch-1');
  assert.strictEqual(list[1].chapterId, 'ch-2');
});

test('appendMangaChapter: 追加同一章节 ID 时抛出可读错误', () => {
  const first = mangaEpub.createMangaEpub({
    title: '测试漫画', mangaId: 'manga-1', originalLanguage: 'ja',
    chapterId: 'ch-1', label: '第 1 话', images: [img(1)]
  });
  assert.throws(
    () => mangaEpub.appendMangaChapter(first.bytes, {
      title: '测试漫画', mangaId: 'manga-1', originalLanguage: 'ja',
      chapterId: 'ch-1', label: '重复章节', images: [img(2)]
    }),
    /该章节已存在/
  );
});

test('appendMangaChapter: 追加到不同漫画的 EPUB 会被拒绝', () => {
  const first = mangaEpub.createMangaEpub({
    title: '测试漫画', mangaId: 'manga-1', originalLanguage: 'ja',
    chapterId: 'ch-1', label: '第 1 话', images: [img(1)]
  });
  assert.throws(
    () => mangaEpub.appendMangaChapter(first.bytes, {
      title: '另一部漫画', mangaId: 'manga-2', originalLanguage: 'ja',
      chapterId: 'ch-9', label: '第 9 话', images: [img(2)]
    }),
    /不是同一部漫画/
  );
});

test('appendMangaChapter: 目标不是漫画 EPUB（缺少旁路索引）时给出可操作提示', () => {
  const plain = zip.writeZip([{ name: 'mimetype', data: Buffer.from('application/epub+zip') }]);
  assert.throws(
    () => mangaEpub.appendMangaChapter(plain, {
      title: '测试漫画', mangaId: 'manga-1', originalLanguage: 'ja',
      chapterId: 'ch-1', label: '第 1 话', images: [img(1)]
    }),
    /请改为新建条目/
  );
});

test('hasChapter: 命中已收录章节，未收录或非法数据都返回 false', () => {
  const { bytes } = mangaEpub.createMangaEpub({
    title: '测试漫画', mangaId: 'manga-1', originalLanguage: 'ja',
    chapterId: 'ch-1', label: '第 1 话', images: [img(1)]
  });
  assert.strictEqual(mangaEpub.hasChapter(bytes, 'ch-1'), true);
  assert.strictEqual(mangaEpub.hasChapter(bytes, 'ch-missing'), false);
  assert.strictEqual(mangaEpub.hasChapter(Buffer.from('not a zip'), 'ch-1'), false);
});

test('compareChapters: 缺省卷号/话号排到最后', () => {
  const withNum = { volume: '1', chapter: '1' };
  const withoutNum = { volume: '', chapter: '' };
  assert.ok(mangaEpub.compareChapters(withNum, withoutNum) < 0);
  assert.ok(mangaEpub.compareChapters(withoutNum, withNum) > 0);
});

test('漫画 EPUB 用 sourceId 隔离不同站点的同名 ID', () => {
  const created = mangaEpub.createMangaEpub({
    title: '中文漫画',
    sourceId: 'copymanga',
    mangaId: 'same-id',
    originalLanguage: 'zh',
    chapterId: 'chapter-1',
    label: '第 1 话',
    images: [img(1)]
  });
  const parsed = mangaEpub.parseMangaEpub(created.bytes);
  assert.strictEqual(parsed.sourceId, 'copymanga');
  assert.strictEqual(mangaEpub.isMangaEpub(created.bytes, 'same-id', 'copymanga'), true);
  assert.strictEqual(mangaEpub.isMangaEpub(created.bytes, 'same-id', 'mangadex'), false);
  assert.throws(() => mangaEpub.appendMangaChapter(parsed, {
    title: '另一来源',
    sourceId: 'mangadex',
    mangaId: 'same-id',
    chapterId: 'chapter-2',
    label: '第 2 话',
    images: [img(2)]
  }), /不是同一部漫画/);
});