import {
  getAlbumDetails,
  getAlbumsWithTracks,
  createAlbum,
  updateAlbum,
  deleteAlbum,
} from '../../services/album.js';
import photosRoutes from './photos.js';
import teasersRoutes from './teasers.js';

/**
 * 앨범 라우트
 * GET: 공개, POST/PUT/DELETE: 인증 필요
 */
export default async function albumsRoutes(fastify) {
  const { db } = fastify;

  // 하위 라우트 등록
  fastify.register(photosRoutes);
  fastify.register(teasersRoutes);

  // ==================== GET (공개) ====================

  /**
   * GET /api/albums
   */
  fastify.get('/', {
    schema: {
      tags: ['albums'],
      summary: '전체 앨범 목록 조회',
    },
  }, async () => {
    return await getAlbumsWithTracks(db);
  });

  /**
   * GET /api/albums/by-name/:albumName/track/:trackTitle
   */
  fastify.get('/by-name/:albumName/track/:trackTitle', {
    schema: {
      tags: ['albums'],
      summary: '앨범명과 트랙명으로 트랙 조회',
    },
  }, async (request, reply) => {
    const albumName = decodeURIComponent(request.params.albumName);
    const trackTitle = decodeURIComponent(request.params.trackTitle);

    const [albums] = await db.query(
      'SELECT * FROM albums WHERE folder_name = ? OR title = ?',
      [albumName, albumName]
    );

    if (albums.length === 0) {
      return reply.code(404).send({ error: '앨범을 찾을 수 없습니다.' });
    }

    const album = albums[0];

    const [tracks] = await db.query(
      'SELECT * FROM album_tracks WHERE album_id = ? AND title = ?',
      [album.id, trackTitle]
    );

    if (tracks.length === 0) {
      return reply.code(404).send({ error: '트랙을 찾을 수 없습니다.' });
    }

    const track = tracks[0];

    const [otherTracks] = await db.query(
      'SELECT id, track_number, title, is_title_track, duration FROM album_tracks WHERE album_id = ? ORDER BY track_number',
      [album.id]
    );

    return {
      ...track,
      album: {
        id: album.id,
        title: album.title,
        folder_name: album.folder_name,
        cover_thumb_url: album.cover_thumb_url,
        cover_medium_url: album.cover_medium_url,
        release_date: album.release_date,
        album_type: album.album_type,
      },
      otherTracks,
    };
  });

  /**
   * GET /api/albums/by-name/:name
   */
  fastify.get('/by-name/:name', {
    schema: {
      tags: ['albums'],
      summary: '앨범명으로 앨범 조회',
    },
  }, async (request, reply) => {
    const name = decodeURIComponent(request.params.name);

    const [albums] = await db.query(
      'SELECT * FROM albums WHERE folder_name = ? OR title = ?',
      [name, name]
    );

    if (albums.length === 0) {
      return reply.code(404).send({ error: '앨범을 찾을 수 없습니다.' });
    }

    return getAlbumDetails(db, albums[0]);
  });

  /**
   * GET /api/albums/:id
   */
  fastify.get('/:id', {
    schema: {
      tags: ['albums'],
      summary: 'ID로 앨범 조회',
    },
  }, async (request, reply) => {
    const [albums] = await db.query('SELECT * FROM albums WHERE id = ?', [
      request.params.id,
    ]);

    if (albums.length === 0) {
      return reply.code(404).send({ error: '앨범을 찾을 수 없습니다.' });
    }

    return getAlbumDetails(db, albums[0]);
  });

  // ==================== POST/PUT/DELETE (인증 필요) ====================

  /**
   * POST /api/albums
   */
  fastify.post('/', {
    schema: {
      tags: ['albums'],
      summary: '앨범 생성',
      security: [{ bearerAuth: [] }],
    },
    preHandler: [fastify.authenticate],
  }, async (request, reply) => {
    const parts = request.parts();
    let data = null;
    let coverBuffer = null;

    for await (const part of parts) {
      if (part.type === 'file' && part.fieldname === 'cover') {
        coverBuffer = await part.toBuffer();
      } else if (part.fieldname === 'data') {
        data = JSON.parse(part.value);
      }
    }

    if (!data) {
      return reply.code(400).send({ error: '데이터가 필요합니다.' });
    }

    const { title, album_type, release_date, folder_name } = data;

    if (!title || !album_type || !release_date || !folder_name) {
      return reply.code(400).send({ error: '필수 필드를 모두 입력해주세요.' });
    }

    return await createAlbum(db, data, coverBuffer);
  });

  /**
   * PUT /api/albums/:id
   */
  fastify.put('/:id', {
    schema: {
      tags: ['albums'],
      summary: '앨범 수정',
      security: [{ bearerAuth: [] }],
    },
    preHandler: [fastify.authenticate],
  }, async (request, reply) => {
    const { id } = request.params;
    const parts = request.parts();
    let data = null;
    let coverBuffer = null;

    for await (const part of parts) {
      if (part.type === 'file' && part.fieldname === 'cover') {
        coverBuffer = await part.toBuffer();
      } else if (part.fieldname === 'data') {
        data = JSON.parse(part.value);
      }
    }

    if (!data) {
      return reply.code(400).send({ error: '데이터가 필요합니다.' });
    }

    const result = await updateAlbum(db, id, data, coverBuffer);
    if (!result) {
      return reply.code(404).send({ error: '앨범을 찾을 수 없습니다.' });
    }
    return result;
  });

  /**
   * DELETE /api/albums/:id
   */
  fastify.delete('/:id', {
    schema: {
      tags: ['albums'],
      summary: '앨범 삭제',
      security: [{ bearerAuth: [] }],
    },
    preHandler: [fastify.authenticate],
  }, async (request, reply) => {
    const { id } = request.params;
    const result = await deleteAlbum(db, id);
    if (!result) {
      return reply.code(404).send({ error: '앨범을 찾을 수 없습니다.' });
    }
    return result;
  });
}