'use strict';

const fs = require('fs');
const path = require('path');
const mongoose = require('mongoose');
const Logger = require('./logger');

const basename = path.basename(module.filename);
const modelPath = path.join(__dirname, 'models');

class DataFactory {
	constructor(options) {
		this.logger = new Logger(options.logger || {});
		this._models = {};

		this.logger.info('Connecting to mongodb...');

		mongoose.Promise = global.Promise;

		const connectOpts = {
			poolSize: 5,
			autoReconnect: true,
			reconnectTries: Number.MAX_VALUE,
			reconnectInterval: 5000,
			keepAlive: 120,
			connectTimeoutMS: 30000,
			promiseLibrary: global.Promise,
		};

		if (!options.disableReplica) {
			connectOpts.replicaSet = 'dyno';
		}

		mongoose.connect(options.dbString, connectOpts);

		const connection = mongoose.connection;

		connection.on('error', this.logger.error);
		connection.once('open', () => this.logger.info('Connected to mongo.'));

		fs
			.readdirSync(modelPath)
			.filter(file => (file.indexOf('.') !== 0) && (file !== basename) && (file.slice(-3) === '.js'))
			.forEach(file => {
				const model = require(path.join(modelPath, file));
				this.registerModel(model);
			});
	}

	get models() {
		return this._models;
	}

	get mongoose() {
		return mongoose;
	}

	get connection() {
		return mongoose.connection;
	}

	collection(...args) {
		return mongoose.connection.collection(...args);
	}

	get Schema() {
		return mongoose.Schema;
	}

	registerModel({name, schema}) {
		const model = mongoose.model(name, schema);
		this._models[model.modelName] = model;
	}
}

module.exports = DataFactory;