'use strict';

var bcrypt = require('bcryptjs'),
	async = require('async'),
	nconf = require('nconf'),
	winston = require('winston'),
	gravatar = require('gravatar'),
	S = require('string'),

	utils = require('./../public/src/utils'),
	plugins = require('./plugins'),
	db = require('./database'),
	meta = require('./meta'),
	groups = require('./groups'),
	topics = require('./topics'),
	events = require('./events'),
	emitter = require('./emitter'),
	Emailer = require('./emailer');

(function(User) {

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

	require('./user/create')(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);

	User.getUserField = function(uid, field, callback) {
		db.getObjectField('user:' + uid, field, callback);
	};

	User.getUserFields = function(uid, fields, callback) {
		db.getObjectFields('user:' + uid, fields, callback);
	};

	User.getMultipleUserFields = function(uids, fields, callback) {

		if (!Array.isArray(uids) || !uids.length) {
			return callback(null, []);
		}

		var keys = uids.map(function(uid) {
			return 'user:' + uid;
		});

		db.getObjectsFields(keys, fields, callback);
	};

	User.getUserData = function(uid, callback) {
		User.getUsersData([uid], function(err, users) {
			callback(err, users ? users[0] : null);
		});
	};

	User.getUsersData = function(uids, callback) {

		if (!Array.isArray(uids) || !uids.length) {
			return callback(null, []);
		}

		var keys = uids.map(function(uid) {
			return 'user:' + uid;
		});

		db.getObjects(keys, function(err, users) {
			if (err) {
				return callback(err);
			}

			users.forEach(function(user) {
				if (user) {
					if (user.password) {
						user.password = null;
						user.hasPassword = true;
					} else {
						user.hasPassword = false;
					}

					if (user.picture === user.uploadedpicture) {
						user.picture = nconf.get('relative_path') + user.picture;
					}
				}
			});

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

	User.updateLastOnlineTime = function(uid, callback) {
		User.getUserField(uid, 'status', function(err, status) {
			function cb(err) {
				if(typeof callback === 'function') {
					callback(err);
				}
			}

			if(err || status === 'offline') {
				return cb(err);
			}

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

	User.isReadyToPost = function(uid, callback) {
		async.parallel({
			banned: function(next) {
				User.getUserField(uid, 'banned',next);
			},
			exists: function(next) {
				db.exists('user:' + uid, next);
			},
			lastposttime: function(next) {
				User.getUserField(uid, 'lastposttime', next);
			}
		}, function(err, results) {
			if (err) {
				return callback(err);
			}

			if (parseInt(results.banned, 10) === 1) {
				return callback(new Error('user-banned'));
			}

			if (!results.exists) {
				return callback(new Error('user-deleted'));
			}
			var lastposttime = results.lastposttime;
			if (!lastposttime) {
				lastposttime = 0;
			}

			if (Date.now() - parseInt(lastposttime, 10) < parseInt(meta.config.postDelay, 10) * 1000) {
				return callback(new Error('too-many-posts'));
			}
			callback();
		});
	};

	User.setUserField = function(uid, field, value, callback) {
		db.setObjectField('user:' + uid, field, value, callback);
	};

	User.setUserFields = function(uid, data, callback) {
		db.setObject('user:' + uid, data, callback);
	};

	User.incrementUserFieldBy = function(uid, field, value, callback) {
		db.incrObjectFieldBy('user:' + uid, field, value, callback);
	};

	User.decrementUserFieldBy = function(uid, field, value, callback) {
		db.incrObjectFieldBy('user:' + uid, field, -value, callback);
	};

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

	User.getUsers = function(uids, callback) {
		function loadUserInfo(user, callback) {
			if (!user) {
				return callback(null, user);
			}

			async.waterfall([
				function(next) {
					User.isAdministrator(user.uid, next);
				},
				function(isAdmin, next) {
					user.status = !user.status ? 'online' : user.status;
					user.administrator = isAdmin ? '1':'0';
					db.isSortedSetMember('users:online', user.uid, next);
				},
				function(isMember, next) {
					if (!isMember) {
						user.status = 'offline';
					}
					next(null, user);
				}
			], callback);
		}

		User.getMultipleUserFields(uids, ['uid', 'username', 'userslug', 'picture', 'status', 'banned', 'postcount', 'reputation'], function(err, usersData) {
			if (err) {
				return callback(err);
			}

			async.map(usersData, loadUserInfo, callback);
		});
	};

	User.createGravatarURLFromEmail = function(email) {
		var options = {
			size: '128',
			default: 'identicon',
			rating: 'pg'
		};

		if (!email) {
			email = '';
			options.forcedefault = 'y';
		}

		return gravatar.url(email, options, true);
	};

	User.hashPassword = function(password, callback) {
		if (!password) {
			return callback(null, password);
		}

		bcrypt.genSalt(nconf.get('bcrypt_rounds'), function(err, salt) {
			if (err) {
				return callback(err);
			}
			bcrypt.hash(password, salt, callback);
		});
	};

	User.onNewPostMade = function(postData) {
		User.addPostIdToUser(postData.uid, postData.pid, postData.timestamp);

		User.incrementUserFieldBy(postData.uid, 'postcount', 1, function(err, newpostcount) {
			db.sortedSetAdd('users:postcount', newpostcount, postData.uid);
		});

		User.setUserField(postData.uid, 'lastposttime', postData.timestamp);
	};

	emitter.on('event:newpost', User.onNewPostMade);

	User.addPostIdToUser = function(uid, pid, timestamp) {
		db.sortedSetAdd('uid:' + uid + ':posts', timestamp, pid);
	};

	User.addTopicIdToUser = function(uid, tid, timestamp) {
		db.sortedSetAdd('uid:' + uid + ':topics', timestamp, tid);
	};

	User.getPostIds = function(uid, start, stop, callback) {
		db.getSortedSetRevRange('uid:' + uid + ':posts', start, stop, function(err, pids) {
			callback(err, Array.isArray(pids) ? pids : []);
		});
	};

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

	User.count = function(callback) {
		db.getObjectField('global', 'userCount', function(err, count) {
			callback(err, count ? count : 0);
		});
	};

	User.getUidByUsername = function(username, callback) {
		db.getObjectField('username:uid', username, callback);
	};

	User.getUidByUserslug = function(userslug, callback) {
		db.getObjectField('userslug:uid', userslug, callback);
	};

	User.getUsernamesByUids = function(uids, callback) {
		User.getMultipleUserFields(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.getObjectField('email:uid', email, callback);
	};

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

	User.isModerator = function(uid, cid, callback) {
		groups.isMember(uid, 'cid:' + cid + ':privileges:mods', callback);
	};

	User.isAdministrator = function(uid, callback) {
		groups.isMember(uid, 'administrators', callback);
	};

	User.isOnline = function(uid, callback) {
		User.getUserField(uid, 'status', function(err, status) {
			if(err) {
				return callback(err);
			}

			var online = require('./socket.io').isUserOnline(uid);

			status = online ? (status || 'online') : 'offline';

			if(status === 'offline') {
				online = false;
			}

			callback(null, {
				online: online,
				uid: uid,
				timestamp: Date.now(),
				status: status
			});
		});
	};


}(exports));