#!/usr/bin/env node

/**
 * Module dependencies.
 */

var	mongoose = require('mongoose'),
	inquirer = require('inquirer'),
	envfile = require('envfile'),
	fs = require('fs-extra'),
	chalk = require('chalk'),
	constants = require('./setup_constants'),
	_ = require('lodash');

var exitSuccess = function(cb) {
	console.log(chalk.green('OhMyForm has been successfully setup'));
	console.log(chalk.green('Have fun using OhMyForm!'));

	if(require.main === module){
		process.exit(1);
	} else if(cb && typeof cb === 'function'){
		cb();
	}
}

var exitError = function(err, cb){
	console.error(chalk.red(err.message || err));
	if(require.main === module){
		process.exit(-1);
	} else if(cb && typeof cb === 'function'){
		cb();
	}
}

var removeENVFile = function() {
	fs.unlinkSync('./\.env')
}

var createOrUpdateAdminUser = function(username, email, password, cb){
	//Command Line Bootstrapping Code
	if (require.main === module) {
		var config = require('../config/config');

		// Bootstrap db connection
		var db = mongoose.connect(config.db.uri, config.db.options, function(err) {
			if (err) {
				console.error(chalk.red('Could not connect to MongoDB!'));
				return cb(new Error(err));
			}
		});
		mongoose.connection.on('error', function(err) {
			return cb(new Error('MongoDB connection error: ' + err));
		});

		// Init the express application
		require('../config/express')(db);

		// Bootstrap passport config
		require('../config/passport')();
	}

	var User = require('../app/models/user.server.model.js');

	var updateObj = {
		firstName: 'Admin',
		lastName: 'Account',
		username: username,
		email: email,
		provider: 'local',
		roles: ['admin', 'user']
	}

	var options = {
		upsert: true,
		new: true,
		setDefaultsOnInsert: true
	}

	User.findOneAndUpdate({ username: username }, updateObj, options, function (err, user) {
		if (err) {
			delete pass;
			delete email;
			delete username;
			return cb(err);
		}

		if(!user){
			delete pass;
			delete email;
			delete username;
			return cb(new Error('Admin User could not be created'));
		}

		user.password = password
		user.save(function(err) {
			if(err){
				delete pass;
				delete email;
				delete username;
				return cb(err);
			}

			delete pass;
			delete email;
			delete username;

			console.log(chalk.green('Successfully created user'));

			cb();
		});
	});

}

var createENVFile = function(cb) {
	inquirer.prompt(constants.questionsPart1).then(function (answersPart1) {
		var nextQuestions = constants.mailerWellKnownQuestions.concat(constants.questionsPart2);
		if(answersPart1['MAILER_SERVICE_PROVIDER'] === 'Custom Mailserver'){
			nextQuestions = constants.mailerCustomQuestions.concat(constants.questionsPart2);
		}

		inquirer.prompt(nextQuestions).then(function (answersPart2) {
			var answers = _.chain(anwsersPart1)._extend(answersPart2).mapValues(function(val){
				if(_.isBoolean(val)){
					return val ? 'TRUE' : 'FALSE';
				}
				return val;
			}).values();

			var email = answers['email'];
			var username = answers['username'];
			var pass = answers['password'];
			delete answers['email'];
		  	delete answers['username'];
			delete answers['password'];

			envfile.stringify(answers, function (err, str) {
		        try {
					fs.outputFileSync('./\.env', str);
		        } catch (fileErr) {
					console.error(chalk.red(fileErr));
					process.exit(-1);
				}

  				console.log(chalk.green('Successfully created .env file'));

				createOrUpdateAdminUser(username, email, pass, function(err){
					if(err) {
						return exitError(err, cb);
					}
					exitSuccess(cb);
				});

			});
		});
	});
}

var checkENVAndRunSetup = function(cb) {
	console.log(chalk.green(constants.asciiArt));
	if(require.main === module){
		console.log(chalk.green('Welcome to OhMyForm\'s Setup Tool'));
		console.log(chalk.green('Follow the prompts to begin.\n-------------------------------------------\n\n'));
	}

	if(fs.existsSync('./\.env') && require.main === module) {
		inquirer.prompt([constants.replaceENVQuestion]).then(function (envAnswer) {
			if (envAnswer['replaceENVFile']) {
				removeENVFile();
				createENVFile(cb);
			} else {
				exitSuccess(cb);
			}
		});
	} else {

		if(require.main !== module){
			console.log(chalk.green('Welcome to OhMyForm\'s Initial Setup\n'));
			console.log(chalk.green('The following prompts will help you properly configure your OhMyForm instance.'));
			console.log(chalk.green('If you want to run this tool after your inital setup, run `node scripts/setup.js`.\n---------------------------------------------------------------------\n\n'));
		}
		createENVFile();
	}
}

module.exports.checkENVAndRunSetup = checkENVAndRunSetup;

if(require.main === module) {
	checkENVAndRunSetup();
}