fromis_9/backend/routes/albums.js

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

const router = express.Router();

// 앨범 상세 정보 조회 헬퍼 함수 (트랙, 티저, 컨셉포토 포함)
async function getAlbumDetails(album) {
  // 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/비디오 조회 (3개 해상도 URL + media_type 포함)
  const [teasers] = await pool.query(
    "SELECT original_url, medium_url, thumb_url, media_type FROM album_teasers WHERE album_id = ? ORDER BY sort_order",
    [album.id]
  );
  album.teasers = teasers;

  // 컨셉 포토 조회 (멤버 정보 + 3개 해상도 URL + 크기 정보 포함)
  const [photos] = await pool.query(
    `SELECT 
      p.id, p.original_url, p.medium_url, p.thumb_url, p.photo_type, p.concept_name, p.sort_order,
      p.width, p.height,
      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,
      original_url: photo.original_url,
      medium_url: photo.medium_url,
      thumb_url: photo.thumb_url,
      width: photo.width,
      height: photo.height,
      type: photo.photo_type,
      members: photo.members,
      sortOrder: photo.sort_order,
    });
  }
  album.conceptPhotos = conceptPhotos;

  return album;
}

// 전체 앨범 조회 (트랙 포함)
router.get("/", async (req, res) => {
  try {
    const [albums] = await pool.query(
      "SELECT id, title, folder_name, album_type, album_type_short, release_date, cover_original_url, cover_medium_url, cover_thumb_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." });
  }
});

// 앨범명으로 조회
router.get("/by-name/:name", async (req, res) => {
  try {
    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 = await getAlbumDetails(albums[0]);
    res.json(album);
  } catch (error) {
    console.error("앨범 조회 오류:", error);
    res.status(500).json({ error: "앨범 정보를 가져오는데 실패했습니다." });
  }
});

// ID로 앨범 조회
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 = await getAlbumDetails(albums[0]);
    res.json(album);
  } catch (error) {
    console.error("앨범 조회 오류:", error);
    res.status(500).json({ error: "앨범 정보를 가져오는데 실패했습니다." });
  }
});

export default router;