import express from "express";
import pool from "../lib/db.js";

const router = express.Router();

// 전체 앨범 조회 (트랙 포함)
router.get("/", async (req, res) => {
  try {
    // 앨범 목록 조회
    const [albums] = await pool.query(
      "SELECT id, title, album_type, album_type_short, release_date, cover_url FROM albums ORDER BY release_date DESC"
    );

    // 각 앨범에 트랙 정보 추가
    for (const album of albums) {
      const [tracks] = await pool.query(
        "SELECT id, track_number, title, is_title_track, duration, lyricist, composer, arranger FROM tracks WHERE album_id = ? ORDER BY track_number",
        [album.id]
      );
      album.tracks = tracks;
    }

    res.json(albums);
  } catch (error) {
    console.error("앨범 조회 오류:", error);
    res.status(500).json({ error: "앨범 정보를 가져오는데 실패했습니다." });
  }
});

// 앨범명(slug)으로 조회
router.get("/by-name/:name", async (req, res) => {
  try {
    // URL 디코딩된 앨범명으로 조회
    const albumName = decodeURIComponent(req.params.name);
    const [albums] = await pool.query("SELECT * FROM albums WHERE title = ?", [
      albumName,
    ]);

    if (albums.length === 0) {
      return res.status(404).json({ error: "앨범을 찾을 수 없습니다." });
    }

    const album = albums[0];

    // 트랙 정보 조회 (가사 포함)
    const [tracks] = await pool.query(
      "SELECT * FROM tracks WHERE album_id = ? ORDER BY track_number",
      [album.id]
    );
    album.tracks = tracks;

    // 티저 이미지 조회
    const [teasers] = await pool.query(
      "SELECT image_url FROM album_teasers WHERE album_id = ? ORDER BY sort_order",
      [album.id]
    );
    album.teasers = teasers.map((t) => t.image_url);

    // 컨셉 포토 조회 (멤버 정보 포함)
    const [photos] = await pool.query(
      `SELECT 
        p.id, p.photo_url, p.photo_type, p.concept_name, p.sort_order,
        GROUP_CONCAT(m.name ORDER BY m.id SEPARATOR ', ') as members
      FROM album_photos p
      LEFT JOIN album_photo_members pm ON p.id = pm.photo_id
      LEFT JOIN members m ON pm.member_id = m.id
      WHERE p.album_id = ?
      GROUP BY p.id
      ORDER BY p.sort_order`,
      [album.id]
    );

    // 컨셉별로 그룹화
    const conceptPhotos = {};
    for (const photo of photos) {
      const concept = photo.concept_name || "Default";
      if (!conceptPhotos[concept]) {
        conceptPhotos[concept] = [];
      }
      conceptPhotos[concept].push({
        id: photo.id,
        url: photo.photo_url,
        type: photo.photo_type,
        members: photo.members,
        sortOrder: photo.sort_order,
      });
    }
    album.conceptPhotos = conceptPhotos;

    res.json(album);
  } catch (error) {
    console.error("앨범 조회 오류:", error);
    res.status(500).json({ error: "앨범 정보를 가져오는데 실패했습니다." });
  }
});

// 특정 앨범 조회 (트랙 및 상세 정보 포함)
router.get("/:id", async (req, res) => {
  try {
    const [albums] = await pool.query("SELECT * FROM albums WHERE id = ?", [
      req.params.id,
    ]);

    if (albums.length === 0) {
      return res.status(404).json({ error: "앨범을 찾을 수 없습니다." });
    }

    const album = albums[0];

    // 트랙 정보 조회 (가사 포함)
    const [tracks] = await pool.query(
      "SELECT * FROM tracks WHERE album_id = ? ORDER BY track_number",
      [album.id]
    );
    album.tracks = tracks;

    // 티저 이미지 조회
    const [teasers] = await pool.query(
      "SELECT image_url FROM album_teasers WHERE album_id = ? ORDER BY sort_order",
      [album.id]
    );
    album.teasers = teasers.map((t) => t.image_url);

    // 컨셉 포토 조회 (멤버 정보 포함)
    const [photos] = await pool.query(
      `SELECT 
        p.id, p.photo_url, p.photo_type, p.concept_name, p.sort_order,
        GROUP_CONCAT(m.name ORDER BY m.id SEPARATOR ', ') as members
      FROM album_photos p
      LEFT JOIN album_photo_members pm ON p.id = pm.photo_id
      LEFT JOIN members m ON pm.member_id = m.id
      WHERE p.album_id = ?
      GROUP BY p.id
      ORDER BY p.sort_order`,
      [album.id]
    );

    // 컨셉별로 그룹화
    const conceptPhotos = {};
    for (const photo of photos) {
      const concept = photo.concept_name || "Default";
      if (!conceptPhotos[concept]) {
        conceptPhotos[concept] = [];
      }
      conceptPhotos[concept].push({
        id: photo.id,
        url: photo.photo_url,
        type: photo.photo_type,
        members: photo.members,
        sortOrder: photo.sort_order,
      });
    }
    album.conceptPhotos = conceptPhotos;

    res.json(album);
  } catch (error) {
    console.error("앨범 조회 오류:", error);
    res.status(500).json({ error: "앨범 정보를 가져오는데 실패했습니다." });
  }
});

export default router;