'use strict';

var async = require('async'),
	nconf = require('nconf'),
	winston = require('winston'),

	user = require('./../user'),
	utils = require('./../../public/src/utils'),
	plugins = require('./../plugins'),
	db = require('./../database'),
	meta = require('./../meta'),
	emailer = require('./../emailer');

(function(UserEmail) {

	UserEmail.exists = function(email, callback) {
		user.getUidByEmail(email, function(err, exists) {
			callback(err, !!exists);
		});
	};

	UserEmail.available = function(email, callback) {
		db.isObjectField('email:uid', email, function(err, exists) {
			callback(err, !exists);
		});
	};

	UserEmail.verify = function(uid, email) {
		if (!plugins.hasListeners('action:email.send')) {
			return;
		}

		var confirm_code = utils.generateUUID(),
			confirm_link = nconf.get('url') + '/confirm/' + confirm_code;

		async.series([
			function(next) {
				db.setObject('confirm:' + confirm_code, {
					email: email,
					uid: uid
				}, next);
			},
			function(next) {
				db.expireAt('confirm:' + confirm_code, Math.floor(Date.now() / 1000 + 60 * 60 * 2), next);
			}
		], function(err) {
			// Send intro email w/ confirm code
			user.getUserField(uid, 'username', function(err, username) {
				if (err) {
					return winston.error(err.message);
				}

				emailer.send('welcome', uid, {
					site_title: (meta.config.title || 'NodeBB'),
					username: username,
					confirm_link: confirm_link,

					subject: 'Welcome to ' + (meta.config.title || 'NodeBB') + '!',
					template: 'welcome',
					uid: uid
				});
			});
		});
	};

	UserEmail.confirm = function(code, callback) {
		db.getObject('confirm:' + code, function(err, confirmObj) {
			if (err) {
				return callback({
					status:'error'
				});
			}

			if (confirmObj && confirmObj.uid && confirmObj.email) {
				db.setObjectField('email:confirmed', confirmObj.email, '1', function() {
					callback({
						status: 'ok'
					});
				});
			} else {
				callback({
					status: 'not_ok'
				});
			}
		});
	};

}(exports));