import Track from '../models/Track.js';

export const artistController = {
  async getProfile(req, res, next) {
    try {
      const artistName = req.params.artistName;

      if (!artistName) {
        return res.status(400).json({ success: false, message: 'Artist name is required' });
      }

      const decodedName = decodeURIComponent(artistName);

      const tracks = await Track.find({ artist: decodedName })
        .select('-__v')
        .sort({ createdAt: -1 })
        .lean();

      if (!tracks.length) {
        return res.status(404).json({ success: false, message: 'Artist not found' });
      }

      const totalTracks = tracks.length;
      const genres = [...new Set(tracks.map(t => t.genre).filter(Boolean))];
      const albums = [...new Set(tracks.map(t => t.album).filter(Boolean))];

      const data = {
        name: decodedName,
        trackCount: totalTracks,
        genres,
        albums,
        imageUrl: tracks.find(t => t.coverUrl)?.coverUrl || null,
        topTracks: tracks.slice(0, 10),
      };

      return res.json({ success: true, data });
    } catch (error) {
      return next(error);
    }
  },

  async getTracks(req, res, next) {
    try {
      const artistName = req.params.artistName;

      if (!artistName) {
        return res.status(400).json({ success: false, message: 'Artist name is required' });
      }

      const decodedName = decodeURIComponent(artistName);

      const tracks = await Track.find({ artist: decodedName })
        .select('-__v')
        .sort({ createdAt: -1 })
        .lean();

      return res.json({ success: true, data: tracks });
    } catch (error) {
      return next(error);
    }
  },
};