'use strict';

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

	user = require('./../user'),
	utils = require('./../../public/src/utils'),

	db = require('./../database'),
	meta = require('./../meta'),
	events = require('./../events'),
	emailer = require('./../emailer');

(function(UserReset) {

	UserReset.validate = function(socket, code, callback) {
		db.getObjectField('reset:uid', code, function(err, uid) {
			if (err || !uid) {
				return callback(err, false);
			}

			db.getObjectField('reset:expiry', code, function(err, expiry) {
				if (err) {
					return callback(err);
				}

				if (parseInt(expiry, 10) >= Date.now() / 1000) {
					callback(null, true);
				} else {
					// Expired, delete from db
					db.deleteObjectField('reset:uid', code);
					db.deleteObjectField('reset:expiry', code);
					callback(null, false);
				}
			});
		});
	};

	UserReset.send = function(socket, email, callback) {
		user.getUidByEmail(email, function(err, uid) {
			if(err || !uid) {
				return callback(err || new Error('invalid-email'));
			}

			// Generate a new reset code
			var reset_code = utils.generateUUID();
			db.setObjectField('reset:uid', reset_code, uid);
			db.setObjectField('reset:expiry', reset_code, (60 * 60) + Math.floor(Date.now() / 1000));

			var reset_link = nconf.get('url') + '/reset/' + reset_code;

			emailer.send('reset', uid, {
				site_title: (meta.config.title || 'NodeBB'),
				reset_link: reset_link,

				subject: 'Password Reset Requested - ' + (meta.config.title || 'NodeBB') + '!',
				template: 'reset',
				uid: uid
			});

			callback();
		});
	};

	UserReset.commit = function(socket, code, password, callback) {
		UserReset.validate(socket, code, function(err, validated) {
			if(err) {
				return callback(err);
			}

			if (validated) {
				db.getObjectField('reset:uid', code, function(err, uid) {
					if (err) {
						return callback(err);
					}

					user.hashPassword(password, function(err, hash) {
						user.setUserField(uid, 'password', hash);
						events.logPasswordReset(uid);
					});

					db.deleteObjectField('reset:uid', code);
					db.deleteObjectField('reset:expiry', code);

					callback(null);
				});
			}
		});
	};

}(exports));