const { ObjectId } = require('mongodb');
const bcrypt = require("bcryptjs");
const ffmpeg = require("fluent-ffmpeg");
const fs = require("fs");

const notifier = require("../notifier");

const server = require("../../server");
const config = server.config;

const connector = require("./CONNECTOR");
var dbo;
connector.connect().then((ret) => {
  dbo = ret;
});

notifier.on("metadata_excluded", item => {
  insert_artist_if_not_exists(item, artist => {
    insert_album_if_not_exists(item, artist, album => {
      insert_track_if_not_exists(item, album);
    });
  });
});

notifier.on("pathdata_excluded", item => {
  insert_box_if_not_exists(item, box => {
    insert_video_if_not_exists(item, box);
  });
});

notifier.on("check_video_details", item => {
  if (!item.tracks) {
    get_video_tracks(item, tracks => {
      item.tracks = tracks;
      update_video(item);
    });
  }
  if (!item.thumbnail) {
    get_video_thumbnail(item, thumbnail => {
      item.thumbnail = thumbnail;
      update_video(item);
    });
  }
});

/*
  MODULES
*/

const albums = require("./albums");
exports.albums = albums;

const radios = require("./radios");
exports.radios = radios;

const tracks = require("./tracks");
exports.tracks = tracks;

const artists = require("./artists");
exports.artists = artists;

const boxes = require("./boxes");
exports.boxes = boxes;

const videos = require("./videos");
exports.videos = videos;

const users = require("./users");
exports.users = users;

const system = require("./system");
exports.system = system;

const share = require("./share");
exports.share = share;

exports.artist_count = function (callback) {
  return dbo.collection("artists").countDocuments(callback);
};

exports.album_count = function (callback) {
  return dbo.collection("albums").countDocuments(callback);
};

exports.track_count = function (callback) {
  return dbo.collection("tracks").countDocuments(callback);
};

exports.box_count = function (callback) {
  return dbo.collection("boxes").countDocuments(callback);
};

exports.video_count = function (callback) {
  return dbo.collection("videos").countDocuments(callback);
};

exports.users_count = function (callback) {
  return dbo.collection("users").countDocuments(callback);
};

/*
  USER
*/

exports.addUser = function (user, callback) {
  bcrypt.genSalt(10, function (err, salt) {
    bcrypt.hash(user.password, salt, function (err, hash) {
      user.password = hash;
      if (!user.roles) {
        user.roles = ["user"];
      }
      user.name = user.name.toLowerCase();
      user.player = {};
      user.fullname = user.name;
      dbo.collection("users").insertOne(user, err => {
        if (err) throw err;
        dbo.collection("users").findOne({ name: user.name }, (err, result) => {
          if (err) throw err;
          delete result.password;
          callback(result);
        });
      });
    });
  });
};

exports.deleteUser = function (id, callback) {
  dbo
    .collection("users")
    .deleteOne({ _id: ObjectId(id) }, (err, result) => {
      if (err) throw err;
      callback(result);
    });
};

exports.updateUserRole = function (user, callback) {
  dbo
    .collection("users")
    .updateOne({ name: user.name }, { $set: { roles: user.roles } }, err => {
      if (err) throw err;
      callback();
    });
};

exports.updateUserAccess = function (name) {
  dbo
    .collection("users")
    .updateOne(
      { name: name },
      { $set: { last_access: new Date().toLocaleString() } }
    );
};

exports.updateUserPassword = function (user, newPassowrd) {
  bcrypt.genSalt(10, function (err, salt) {
    bcrypt.hash(newPassowrd, salt, function (err, hash) {
      dbo
        .collection("users")
        .updateOne({ name: user }, { $set: { password: hash } },
          err => { if (err) throw err; });
    });
  });
};

exports.updateUserConfig = function (user, body, callback) {
  dbo.collection("users").updateOne(
    { name: user.name },
    {
      $set: {
        mobile_bpm: body.mobile_bpm,
        desktop_bpm: body.desktop_bpm,
        video_lang: body.video_lang,
        video_quality: body.video_quality,
        fullname: body.fullname
      }
    },
    err => {
      if (err) throw err;
      if (callback) {
        callback();
      }
    }
  );
};

exports.updateUserSettings = function (user, callback) {
  dbo
    .collection("users")
    .updateOne(
      { _id: user._id },
      { $set: { player: user.player } },
      err => {
        if (err) throw err;
        if (callback) {
          callback();
        }
      }
    );
};

exports.userByName = function (name, callback) {
  dbo.collection("users").findOne({ name: name.toLowerCase() }, (err, result) => {
    if (err) throw err;
    callback(result);
  });
};

exports.userById = function (id, callback) {
  dbo
    .collection("users")
    .findOne({ _id: ObjectId(id) }, (err, result) => {
      if (err) throw err;
      callback(result);
    });
};

/*
  HISTORY
*/
exports.historyList = function (id, callback) {
  dbo
    .collection("history")
    .find(
      { userId: id, type: { $in: ['album', 'artist', 'box', 'radio'] } },
      { projection: { _id: false, userId: false } }
    )
    .sort({ _id: -1 })
    .limit(12)
    .toArray((err, result) => {
      if (err) throw err;
      callback(result);
    });
};

exports.clearHistory = function (id, callback) {
  dbo
    .collection("history")
    .deleteMany({ userId: id }, (err, result) => {
      if (err) throw err;
      callback(result);
    });
};

exports.updateHistory = function (item, callback) {
  dbo
    .collection("history")
    .deleteMany({ userId: item.userId, id: item.id, type: { $in: ['album', 'artist', 'box', 'radio'] } }, err => {
      if (err) throw err;
      dbo
        .collection("history")
        .insertOne(item, err => {
          if (err) throw err;
          callback();
        }
        );
    });
};

exports.search = function (term, callback) {
  let r = [];
  dbo
    .collection("artists")
    .find(
      { name: { $regex: term, $options: "i" } },
      { projection: { _id: true, name: true, "covers.cover256": true } }
    )
    .toArray((err, result) => {
      if (result && result.length > 0) {
        result.forEach(item => {
          item.type = "artist";
          item.search_rank = item.name.toLowerCase().indexOf(term);
        });
        r = r.concat(result);
      }
      dbo
        .collection("albums")
        .find(
          { title: { $regex: term, $options: "i" } },
          { projection: { _id: true, title: true, "covers.cover128": true } }
        )
        .toArray((err, result) => {

          if (result && result.length > 0) {
            result.forEach(item => {
              item.type = "album";
              item.parent = {};
              item.search_rank = item.title.toLowerCase().indexOf(term);
            });
            r = r.concat(result);
          }
          dbo
            .collection("tracks")
            .aggregate([
              {
                $lookup: {
                  from: "albums",
                  localField: "album_id",
                  foreignField: "_id",
                  as: "parent"
                }
              }, {
                $unwind: "$parent"
              }, {
                $project: {
                  album_id: false,
                  bitrate: false,
                  disk: false,
                  duration: false,
                  mime: false,
                  path: false,
                  genre: false,
                  track: false,
                  "parent.artist_id": false,
                  "parent.year": false,
                  "parent.covers.cover32": false,
                  "parent.covers.cover128": false,
                  "parent.covers.cover256": false,
                  "parent.covers.cover512": false
                }
              }, {
                $match: { title: { $regex: term, $options: "i" } }
              }])
            .toArray((err, result) => {
              if (result && result.length > 0) {
                result.forEach(item => {
                  item.type = "track";
                  item.search_rank = item.title.toLowerCase().indexOf(term);
                });
                r = r.concat(result);
              }
              dbo
                .collection("boxes")
                .find(
                  { title: { $regex: term, $options: "i" } },
                  { projection: { _id: true, title: true, "covers.cover128": true } }
                )
                .toArray((err, result) => {
                  if (result && result.length > 0) {
                    result.forEach(item => {
                      item.type = "box";
                      item.search_rank = item.title.toLowerCase().indexOf(term);
                    });
                    r = r.concat(result);
                  }

                  dbo
                    .collection("videos")
                    .aggregate([
                      {
                        $lookup: {
                          from: "boxes",
                          localField: "box_id",
                          foreignField: "_id",
                          as: "parent"
                        }
                      }, {
                        $unwind: "$parent"
                      }, {
                        $project: {
                          path: false,
                          mime: false,
                          tracks: false,
                          box_id: false,
                          "parent.box_id": false,
                          "parent.year": false,
                          "parent.path": false,
                          "parent.title": false,
                          "parent.covers.cover32": false,
                          "parent.covers.cover64": false,
                          "parent.covers.cover128": false,
                          "parent.covers.cover256": false,
                          "parent.covers.cover512": false
                        }
                      }, {
                        $match: { title: { $regex: term, $options: "i" } }
                      }]
                    )
                    .toArray((err, result) => {
                      if (result && result.length > 0) {
                        result.forEach(item => {
                          item.type = "video";
                          item.search_rank = item.title
                            .toLowerCase()
                            .indexOf(term);
                        });
                        r = r.concat(result);
                      }
                      dbo
                        .collection("radios")
                        .find(
                          { name: { $regex: term, $options: "i" } },
                          { projection: { _id: true, name: true } }
                        )
                        .toArray((err, result) => {
                          if (result && result.length > 0) {
                            result.forEach(item => {
                              item.type = "radio";
                              item.search_rank = item.name
                                .toLowerCase()
                                .indexOf(term);
                            });
                            r = r.concat(result);
                          }
                          callback(
                            r
                              .sort((a, b) => {
                                return a.search_rank - b.search_rank;
                              })
                              .splice(0, 50)
                          );
                        });
                    });
                });
            });
        });
    });
};

/*
  CHAT
*/
exports.messageList = function (callback) {
  dbo
    .collection("chat")
    .aggregate([
      {
        $lookup: {
          from: "users",
          localField: "user_id",
          foreignField: "_id",
          as: "user"
        }
      },
      {
        $project: {
          "user.password": false,
          "user.player": false
        }
      },
      { $unwind: "$user" },
      { $sort: { _id: 1 } }
    ])
    .toArray((err, result) => {
      if (err) throw err;
      callback(result.splice(0, 100));
    });
};

exports.writeMessage = function (user, message, callback) {
  dbo
    .collection("chat")
    .insertOne(
      { user_id: user._id, message: message, timestamp: Date.now() },
      (err, result) => {
        if (err) throw err;
        callback(result.ops);
      }
    );
};

exports.deleteMessage = function (id, user, callback) {
  dbo.collection("chat").deleteOne({ _id: ObjectId(id), user_id: user._id }, err => {
    if (err) throw err;
    callback();
  });
};

/*
  FUNCTIONS
*/
function insert_artist_if_not_exists(item, callback) {
  dbo.collection("artists").findOne({ name: item.artist }, (err, result) => {
    if (err) throw err;
    if (result) {
      callback(result);
    } else {
      let artist = {
        name: item.artist,
        insert_on: Date.now()
      }
      if (item.owner) {
        artist.owner_id = item.owner._id;
      }
      dbo
        .collection("artists")
        .updateOne(
          { name: item.artist },
          { $set: artist },
          { upsert: true },
          err => {
            if (err) throw err;
            insert_artist_if_not_exists(item, callback);
          }
        );
    }
  });
}

function insert_album_if_not_exists(item, artist, callback) {
  dbo
    .collection("albums")
    .findOne({ artist_id: artist._id, title: item.album }, (err, result) => {
      if (err) throw err;
      if (result) {
        callback(result);
      } else {
        let album = {
          artist_id: artist._id,
          artist_name: artist.name,
          title: item.album.trim(),
          year: item.year,
          insert_on: Date.now()
        }
        if (item.covers) {
          album.cover32 = item.covers.cover32;
          album.cover64 = item.covers.cover64;
          album.cover128 = item.covers.cover128;
          album.cover256 = item.covers.cover256;
        }
        if (item.owner) {
          album.owner_id = item.owner._id;
        }
        dbo.collection("albums").updateOne(
          { artist_id: artist._id, title: item.album },
          { $set: album },
          { upsert: true },
          err => {
            if (err) throw err;
            insert_album_if_not_exists(item, artist, callback);
          }
        );
      }
    });
}

function insert_track_if_not_exists(item, album, callback) {
  let short_path = ""
  if (item.path.indexOf(config.upload_folder) == 0) {
    short_path = item.path.replace(config.upload_folder, "");
  } else {
    short_path = item.path.replace(config.music_folder, "");
  }

  dbo.collection("tracks").updateOne(
    { path: short_path },
    {
      $set: {
        title: item.title,
        path: short_path,
        album_id: album._id,
        duration: item.duration,
        bitrate: item.bitrate,
        mime: item.mime,
        disk: item.disk,
        track: item.track,
        genre: item.genre,
        insert_on: Date.now()
      }
    },
    { upsert: true },
    err => {
      if (err) throw err;
      dbo.collection("tracks").findOne({ path: short_path }, (err, result) => {
        if (err) throw err;
        if (callback) {
          callback(result);
        }
      });
    }
  );
}

function insert_box_if_not_exists(item, callback) {
  let short_path = item.box_path.replace(config.video_folder, "");
  dbo
    .collection("boxes")
    .findOne({ title: item.box, year: item.year }, (err, result) => {
      if (err) throw err;
      if (result) {
        callback(result);
      } else {
        let box = {
          title: item.box,
          path: short_path,
          year: item.year,
          cover64: item.cover64,
          cover128: item.cover128,
          cover256: item.cover256,
          cover512: item.cover512,
          insert_on: Date.now()
        }
        if (item.owner) {
          box.owner_id = item.owner._id;
        }
        dbo
          .collection("boxes")
          .updateOne(
            { title: item.box },
            { $set: box },
            { upsert: true },
            err => {
              if (err) throw err;
              insert_box_if_not_exists(item, callback);
            }
          );
      }
    });
}

function insert_video_if_not_exists(item, box, callback) {
  item.path = item.path.replace(config.video_folder, "");
  dbo.collection("videos").updateOne(
    { path: item.path },
    {
      $set: {
        title: item.title,
        path: item.path,
        box_id: box._id,
        mime: item.mime,
        insert_on: Date.now()
      }
    },
    { upsert: true },
    err => {
      if (err) throw err;
      dbo.collection("videos").findOne({ path: item.path }, (err, result) => {
        if (err) throw err;
        if (callback) {
          callback(result);
        }
        if (!result.tracks) {
          get_video_tracks(item, tracks => {
            result.tracks = tracks;
            update_video(result);
          });
        }
        if (!result.thumbnail) {
          get_video_thumbnail(result, thumbnail => {
            result.thumbnail = thumbnail;
            update_video(result);
          });
        }
      });
    }
  );
}

function update_video(video, callback) {
  process.stdout.write("updating video: " + video.title + "\n");
  let val = {};
  if (video.tracks) {
    val.tracks = video.tracks;
  }
  if (video.thumbnail) {
    val.thumbnail = video.thumbnail;
  }

  if (!val) {
    if (callback) {
      callback();
    }
    return;
  }

  dbo
    .collection("videos")
    .updateOne({ _id: video._id }, { $set: val }, { upsert: false }, err => {
      if (err) throw err;
      if (callback) {
        callback();
      }
    });
}

function get_video_thumbnail(video, callback) {
  let path = config.video_folder + video.path;
  if (!fs.existsSync(path)) {
    path = config.upload_folder + video.path;
  }
  ffmpeg(path)
    .on("end", () => {
      process.stdout.write("Thumbnail for '" + video.title + "' created\n");
      let thumbnail =
        config.cache_folder + "/video_covers/" + video._id.toString() + ".png";
      if (!fs.existsSync(thumbnail)) {
        callback(null);
        return;
      }
      let bitmap = fs.readFileSync(thumbnail);
      callback("data:image/png;base64, " + bitmap.toString("base64"));
      fs.unlinkSync(thumbnail);
    })
    .on("error", err => {
      process.stdout.write(
        "Thumbnail error for " + video.title + ": " + err.message + "\n"
      );
      callback(null);
    })
    .screenshot({
      timestamps: ["20%"],
      filename: video._id.toString(),
      folder: config.cache_folder + "/video_covers",
      size: "346x180"
    });
}

function get_video_tracks(video, callback) {
  let path = config.video_folder + video.path;
  if (!fs.existsSync(path)) {
    path = config.upload_folder + video.path;
  }
  ffmpeg(path).ffprobe((err, data) => {
    if (!data) {
      return callback([]);
    }
    let audio_streams = data.streams.filter(f => f.codec_type == "audio");
    let return_value = audio_streams.map(m => {
      return {
        index: m.index,
        lang: (m.tags && m.tags.language
          ? m.tags.language
          : m.index
            ? m.index
            : ""
        ).toString(),
        title: (m.tags && m.tags.title
          ? m.tags.title
          : m.index
            ? m.index
            : ""
        ).toString()
      };
    });
    callback(return_value);
  });
}