'use strict';

var fs = require('fs');
var path = require('path');
var basename = path.basename(__filename);
var Sequelize = require('sequelize');
var sync = require('../sync.js');

module.exports = function (config) {
  var db = {};

  db.Sequelize = Sequelize;

  if (!config) {
    config = {
      dialect: "sqlite",
      storage: "./db.sqlite"
    };
  }

  if (config.use_env_variable) {
    db.sequelize = new db.Sequelize(process.env[config.use_env_variable], config);
  }
  else {
    db.sequelize = new db.Sequelize(config.database, config.username, config.password, config);
  }

  fs.readdirSync(__dirname).filter(function (file) {
    return ('.' !== file[0]) && (file !== basename) && (file.slice(-3) === '.js');
  }).forEach(function (file) {
    var model = db.sequelize['import'](path.join(__dirname, file));
    db[model.name] = model;
  });

  Object.keys(db).forEach(function (modelName) {
    if (db[modelName].associate) {
      db[modelName].associate(db);
    }
  });

  var synced = false;
  if (!synced) {
    return sync(db).then(function () {
      synced = true;
      return db;
    });
  }
  return Promise.resolve(db);
};