const { Sequelize } = require('sequelize');
const Op = Sequelize.Op;

const DATABASE_URI = process.env.DATABASE_URI;

const database = new Sequelize(DATABASE_URI, { logging: false });

const Torrent = database.define('torrent',
    {
      infoHash: { type: Sequelize.STRING(64), primaryKey: true },
      provider: { type: Sequelize.STRING(32), allowNull: false },
      torrentId: { type: Sequelize.STRING(128) },
      title: { type: Sequelize.STRING(256), allowNull: false },
      size: { type: Sequelize.BIGINT },
      type: { type: Sequelize.STRING(16), allowNull: false },
      uploadDate: { type: Sequelize.DATE, allowNull: false },
      seeders: { type: Sequelize.SMALLINT },
      trackers: { type: Sequelize.STRING(4096) },
      languages: { type: Sequelize.STRING(4096) },
      resolution: { type: Sequelize.STRING(16) }
    }
);

const File = database.define('file',
    {
      id: { type: Sequelize.BIGINT, autoIncrement: true, primaryKey: true },
      infoHash: {
        type: Sequelize.STRING(64),
        allowNull: false,
        references: { model: Torrent, key: 'infoHash' },
        onDelete: 'CASCADE'
      },
      fileIndex: { type: Sequelize.INTEGER },
      title: { type: Sequelize.STRING(256), allowNull: false },
      size: { type: Sequelize.BIGINT },
      imdbId: { type: Sequelize.STRING(32) },
      imdbSeason: { type: Sequelize.INTEGER },
      imdbEpisode: { type: Sequelize.INTEGER },
      kitsuId: { type: Sequelize.INTEGER },
      kitsuEpisode: { type: Sequelize.INTEGER }
    },
);

const Subtitle = database.define('subtitle',
    {
      infoHash: {
        type: Sequelize.STRING(64),
        allowNull: false,
        references: { model: Torrent, key: 'infoHash' },
        onDelete: 'CASCADE'
      },
      fileIndex: { type: Sequelize.INTEGER, allowNull: false },
      fileId: {
        type: Sequelize.BIGINT,
        allowNull: true,
        references: { model: File, key: 'id' },
        onDelete: 'SET NULL'
      },
      title: { type: Sequelize.STRING(512), allowNull: false },
      size: { type: Sequelize.BIGINT, allowNull: false },
    },
    { timestamps: false }
);

Torrent.hasMany(File, { foreignKey: 'infoHash', constraints: false });
File.belongsTo(Torrent, { foreignKey: 'infoHash', constraints: false });
File.hasMany(Subtitle, { foreignKey: 'fileId', constraints: false });
Subtitle.belongsTo(File, { foreignKey: 'fileId', constraints: false });

function getTorrent(infoHash) {
  return Torrent.findOne({ where: { infoHash: infoHash } });
}

function getFiles(infoHashes) {
  return File.findAll({ where: { infoHash: { [Op.in]: infoHashes} } });
}

function getImdbIdMovieEntries(imdbId) {
  return File.findAll({
    where: {
      imdbId: { [Op.eq]: imdbId }
    },
    include: [Torrent],
    limit: 500,
    order: [
      [Torrent, 'seeders', 'DESC']
    ]
  });
}

function getImdbIdSeriesEntries(imdbId, season, episode) {
  return File.findAll({
    where: {
      imdbId: { [Op.eq]: imdbId },
      imdbSeason: { [Op.eq]: season },
      imdbEpisode: { [Op.eq]: episode }
    },
    include: [Torrent],
    limit: 500,
    order: [
      [Torrent, 'seeders', 'DESC']
    ]
  });
}

function getKitsuIdMovieEntries(kitsuId) {
  return File.findAll({
    where: {
      kitsuId: { [Op.eq]: kitsuId }
    },
    include: [Torrent],
    limit: 500,
    order: [
      [Torrent, 'seeders', 'DESC']
    ]
  });
}

function getKitsuIdSeriesEntries(kitsuId, episode) {
  return File.findAll({
    where: {
      kitsuId: { [Op.eq]: kitsuId },
      kitsuEpisode: { [Op.eq]: episode }
    },
    include: [Torrent],
    limit: 500,
    order: [
      [Torrent, 'seeders', 'DESC']
    ]
  });
}

module.exports = {
  getTorrent,
  getFiles,
  getImdbIdMovieEntries,
  getImdbIdSeriesEntries,
  getKitsuIdMovieEntries,
  getKitsuIdSeriesEntries
};