/* This file is part of the Notesnook project (https://notesnook.com/)
 *
 * Copyright (C) 2022 Streetwriters (Private) Limited
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import { CURRENT_DATABASE_VERSION } from "../common";
import Migrator from "../database/migrator";

class Migrations {
  /**
   *
   * @param {import("./index").default} db
   */
  constructor(db) {
    this._db = db;
    this._migrator = new Migrator();
    this._isMigrating = false;
  }

  async init() {
    this.dbVersion =
      (await this._db.storage.read("v")) || CURRENT_DATABASE_VERSION;
    this._db.storage.write("v", this.dbVersion);
  }

  required() {
    return this.dbVersion < CURRENT_DATABASE_VERSION;
  }

  async migrate() {
    if (!this.required() || this._isMigrating) return;
    this._isMigrating = true;

    await this._db.notes.init();
    const content = await this._db.content.all();

    const collections = [
      { index: this._db.attachments.all, dbCollection: this._db.attachments },
      {
        index: this._db.notebooks.raw,
        dbCollection: this._db.notebooks,
      },
      {
        index: this._db.tags.raw,
        dbCollection: this._db.tags,
      },
      {
        index: this._db.colors.raw,
        dbCollection: this._db.colors,
      },
      {
        index: this._db.trash.raw,
        dbCollection: this._db.trash,
      },
      {
        index: content,
        dbCollection: this._db.content,
      },
      {
        index: [this._db.settings.raw],
        dbCollection: this._db.settings,
        type: "settings",
      },
      {
        index: this._db.notes.raw,
        dbCollection: this._db.notes,
      },
    ];
    await this._migrator.migrate(collections, (item) => item, this.dbVersion);
    await this._db.storage.write("v", CURRENT_DATABASE_VERSION);
    this.dbVersion = CURRENT_DATABASE_VERSION;
  }
}
export default Migrations;