'use strict';

var	async = require('async'),

	plugins = require('./plugins'),
	db = require('./database'),
	topics = require('./topics'),
	privileges = require('./privileges'),
	utils = require('../public/src/utils');

(function(User) {

	User.email = require('./user/email');
	User.notifications = require('./user/notifications');
	User.reset = require('./user/reset');
	User.digest = require('./user/digest');

	require('./user/data')(User);
	require('./user/auth')(User);
	require('./user/create')(User);
	require('./user/posts')(User);
	require('./user/categories')(User);
	require('./user/follow')(User);
	require('./user/profile')(User);
	require('./user/admin')(User);
	require('./user/delete')(User);
	require('./user/settings')(User);
	require('./user/search')(User);
	require('./user/jobs')(User);
	require('./user/picture')(User);
	require('./user/approval')(User);
	require('./user/invite')(User);
	require('./user/password')(User);

	User.updateLastOnlineTime = function(uid, callback) {
		callback = callback || function() {};
		User.getUserFields(uid, ['status', 'lastonline'], function(err, userData) {
			var now = Date.now();
			if (err || userData.status === 'offline' || now - parseInt(userData.lastonline, 10) < 300000) {
				return callback(err);
			}

			User.setUserField(uid, 'lastonline', now, callback);
		});
	};

	User.updateOnlineUsers = function(uid, callback) {
		callback = callback || function() {};

		var now = Date.now();
		async.waterfall([
			function(next) {
				db.sortedSetScore('users:online', uid, next);
			},
			function(userOnlineTime, next) {
				if (now - parseInt(userOnlineTime, 10) < 300000) {
					return callback();
				}
				db.sortedSetAdd('users:online', now, uid, next);
			},
			function(next) {
				topics.pushUnreadCount(uid);
				plugins.fireHook('action:user.online', {uid: uid, timestamp: now});
				next();
			}
		], callback);
	};

	User.getUidsFromSet = function(set, start, stop, callback) {
		if (set === 'users:online') {
			var count = parseInt(stop, 10) === -1 ? stop : stop - start + 1;
			var now = Date.now();
			db.getSortedSetRevRangeByScore(set, start, count, now, now - 300000, callback);
		} else {
			db.getSortedSetRevRange(set, start, stop, callback);
		}
	};

	User.getUsersFromSet = function(set, uid, start, stop, callback) {
		async.waterfall([
			function(next) {
				User.getUidsFromSet(set, start, stop, next);
			},
			function(uids, next) {
				User.getUsers(uids, uid, next);
			}
		], callback);
	};

	User.getUsers = function(uids, uid, callback) {
		var fields = ['uid', 'username', 'userslug', 'picture', 'status', 'banned', 'joindate', 'postcount', 'reputation', 'email:confirmed', 'lastonline'];

		async.waterfall([
			function (next) {
				plugins.fireHook('filter:users.addFields', {fields: fields}, next);
			},
			function (data, next) {
				data.fields = data.fields.filter(function(field, index, array) {
					return array.indexOf(field) === index;
				});

				async.parallel({
					userData: function(next) {
						User.getUsersFields(uids, data.fields, next);
					},
					isAdmin: function(next) {
						User.isAdministrator(uids, next);
					}
				}, next);
			},
			function (results, next) {
				results.userData.forEach(function(user, index) {
					if (user) {
						user.status = User.getStatus(user);
						user.joindateISO = utils.toISOString(user.joindate);
						user.administrator = results.isAdmin[index];
						user.banned = parseInt(user.banned, 10) === 1;
						user['email:confirmed'] = parseInt(user['email:confirmed'], 10) === 1;
					}
				});
				plugins.fireHook('filter:userlist.get', {users: results.userData, uid: uid}, next);
			},
			function (data, next) {
				next(null, data.users);
			}
		], callback);
	};

	User.getStatus = function(userData) {
		var isOnline = Date.now() - parseInt(userData.lastonline, 10) < 300000;
		return isOnline ? (userData.status || 'online') : 'offline';
	};

	User.isOnline = function(uid, callback) {
		db.sortedSetScore('users:online', uid, function(err, lastonline) {
			if (err) {
				return callback(err);
			}
			var isOnline = Date.now() - parseInt(lastonline, 10) < 300000;
			callback(null, isOnline);
		});
	};

	User.exists = function(uid, callback) {
		db.isSortedSetMember('users:joindate', uid, callback);
	};

	User.existsBySlug = function(userslug, callback) {
		User.getUidByUserslug(userslug, function(err, exists) {
			callback(err, !! exists);
		});
	};

	User.getUidByUsername = function(username, callback) {
		if (!username) {
			return callback(null, 0);
		}
		db.sortedSetScore('username:uid', username, callback);
	};

	User.getUidsByUsernames = function(usernames, callback) {
		db.sortedSetScores('username:uid', usernames, callback);
	};

	User.getUidByUserslug = function(userslug, callback) {
		if (!userslug) {
			return callback(null, 0);
		}
		db.sortedSetScore('userslug:uid', userslug, callback);
	};

	User.getUsernamesByUids = function(uids, callback) {
		User.getUsersFields(uids, ['username'], function(err, users) {
			if (err) {
				return callback(err);
			}

			users = users.map(function(user) {
				return user.username;
			});

			callback(null, users);
		});
	};

	User.getUsernameByUserslug = function(slug, callback) {
		async.waterfall([
			function(next) {
				User.getUidByUserslug(slug, next);
			},
			function(uid, next) {
				User.getUserField(uid, 'username', next);
			}
		], callback);
	};

	User.getUidByEmail = function(email, callback) {
		db.sortedSetScore('email:uid', email.toLowerCase(), callback);
	};

	User.getUsernameByEmail = function(email, callback) {
		db.sortedSetScore('email:uid', email.toLowerCase(), function(err, uid) {
			if (err) {
				return callback(err);
			}
			User.getUserField(uid, 'username', callback);
		});
	};

	User.isModerator = function(uid, cid, callback) {
		privileges.users.isModerator(uid, cid, callback);
	};

	User.isAdministrator = function(uid, callback) {
		privileges.users.isAdministrator(uid, callback);
	};

	User.isAdminOrSelf = function(callerUid, uid, callback) {
		if (parseInt(callerUid, 10) === parseInt(uid, 10)) {
			return callback();
		}
		User.isAdministrator(callerUid, function(err, isAdmin) {
			if (err || !isAdmin) {
				return callback(err || new Error('[[error:no-privileges]]'));
			}
			callback();
		});
	};


}(exports));