const path = require("path");
require("dotenv").config({ path: path.join(__dirname, "../.env") });

const { dropDatabase, createDatabase } = require("pg-god");
const { createConnection } = require("typeorm");

const DB_USERNAME = process.env.DB_USERNAME || "postgres";
const DB_PASSWORD = process.env.DB_PASSWORD || "";
const DB_URL = `postgres://${DB_USERNAME}:${DB_PASSWORD}@localhost/medusa-integration`;

const pgGodCredentials = {
  user: DB_USERNAME,
  password: DB_PASSWORD,
};

const keepTables = [
  "staged_job",
  "shipping_profile",
  "fulfillment_provider",
  "payment_provider",
  "country",
  "currency",
];

let connectionType = "postgresql";

const DbTestUtil = {
  db_: null,

  setDb: function (connection) {
    this.db_ = connection;
  },

  clear: async function () {
    this.db_.synchronize(true);
  },

  teardown: async function () {
    const entities = this.db_.entityMetadatas;
    const manager = this.db_.manager;

    if (connectionType === "sqlite") {
      await manager.query(`PRAGMA foreign_keys = OFF`);
    } else {
      await manager.query(`SET session_replication_role = 'replica';`);
    }

    for (const entity of entities) {
      if (keepTables.includes(entity.tableName)) {
        continue;
      }

      await manager.query(`DELETE FROM "${entity.tableName}";`);
    }
    if (connectionType === "sqlite") {
      await manager.query(`PRAGMA foreign_keys = ON`);
    } else {
      await manager.query(`SET session_replication_role = 'origin';`);
    }
  },

  shutdown: async function () {
    await this.db_.close();
    const databaseName = "medusa-integration";
    return await dropDatabase({ databaseName }, pgGodCredentials);
  },
};

const instance = DbTestUtil;

module.exports = {
  initDb: async function ({ cwd }) {
    const configPath = path.resolve(path.join(cwd, `medusa-config.js`));

    const modelsLoader = require(path.join(
      cwd,
      `node_modules`,
      `@medusajs`,
      `medusa`,
      `dist`,
      `loaders`,
      `models`
    )).default;
    const entities = modelsLoader({}, { register: false });

    const { projectConfig } = require(configPath);
    if (projectConfig.database_type === "sqlite") {
      connectionType = "sqlite";
      const dbConnection = await createConnection({
        type: "sqlite",
        database: projectConfig.database_database,
        synchronize: true,
        entities,
      });

      instance.setDb(dbConnection);
      return dbConnection;
    } else {
      const migrationDir = path.resolve(
        path.join(
          cwd,
          `node_modules`,
          `@medusajs`,
          `medusa`,
          `dist`,
          `migrations`
        )
      );

      const databaseName = "medusa-integration";
      await createDatabase({ databaseName }, pgGodCredentials);

      const connection = await createConnection({
        type: "postgres",
        url: DB_URL,
        migrations: [`${migrationDir}/*.js`],
      });

      await connection.runMigrations();
      await connection.close();

      const dbConnection = await createConnection({
        type: "postgres",
        url: DB_URL,
        entities,
      });

      instance.setDb(dbConnection);
      return dbConnection;
    }
  },
  useDb: function () {
    return instance;
  },
};