var	posts = require('../posts'),
	meta = require('../meta'),
	topics = require('../topics'),
	favourites = require('../favourites'),
	postTools = require('../postTools'),
	user = require('../user'),
	index = require('./index'),

	SocketPosts = {};

SocketPosts.reply = function(socket, data, callback) {
	if (!socket.uid && !parseInt(meta.config.allowGuestPosting, 10)) {
		socket.emit('event:alert', {
			title: 'Reply Unsuccessful',
			message: 'You don't seem to be logged in, so you cannot reply.',
			type: 'danger',
			timeout: 2000
		});
		return;
	}

	if(!data || !data.topic_id || !data.content) {
		return callback(new Error('invalid data'));
	}

	topics.reply(data.topic_id, socket.uid, data.content, function(err, postData) {
		if(err) {
			if (err.message === 'content-too-short') {
				module.parent.exports.emitContentTooShortAlert(socket);
			} else if (err.message === 'too-many-posts') {
				module.parent.exports.emitTooManyPostsAlert(socket);
			} else if (err.message === 'reply-error') {
				socket.emit('event:alert', {
					title: 'Reply Unsuccessful',
					message: 'Your reply could not be posted at this time. Please try again later.',
					type: 'warning',
					timeout: 2000
				});
			} else if (err.message === 'no-privileges') {
				socket.emit('event:alert', {
					title: 'Unable to post',
					message: 'You do not have posting privileges in this category.',
					type: 'danger',
					timeout: 7500
				});
			}
			return callback(err);
		}

		if (postData) {

			module.parent.exports.emitTopicPostStats();

			socket.emit('event:alert', {
				title: 'Reply Successful',
				message: 'You have successfully replied. Click here to view your reply.',
				type: 'success',
				timeout: 2000
			});
			var socketData = {
				posts: [postData]
			};
			index.server.sockets.in('topic_' + postData.tid).emit('event:new_post', socketData);
			index.server.sockets.in('recent_posts').emit('event:new_post', socketData);
			index.server.sockets.in('user/' + postData.uid).emit('event:new_post', socketData);
			callback();
		}
	});
};

SocketPosts.favourite = function(socket, data) {
	if(data && data.pid && data.room_id) {
		favourites.favourite(data.pid, data.room_id, socket.uid, socket);
	}
};

SocketPosts.unfavourite = function(socket, data) {
	if(data && data.pid && data.room_id) {
		favourites.unfavourite(data.pid, data.room_id, socket.uid, socket);
	}
};

SocketPosts.uploadImage = function(socket, data, callback) {
	if(data) {
		posts.uploadPostImage(data, callback);
	}
};

SocketPosts.uploadFile = function(socket, data, callback) {
	if(data) {
		posts.uploadPostFile(data, callback);
	}
};

SocketPosts.getRawPost = function(socket, pid, callback) {
	posts.getPostFields(pid, ['content', 'deleted'], function(err, data) {
		if(err) {
			return callback(err);
		}

		if(data.deleted === '1') {
			return callback(new Error('This post no longer exists'));
		}

		callback(null, data.content);
	});
};

SocketPosts.edit = function(socket, data, callback) {
	if(!socket.uid) {
		socket.emit('event:alert', {
			title: 'Can't edit',
			message: 'Guests can't edit posts!',
			type: 'warning',
			timeout: 2000
		});
		return callback(new Error('not-logged-in'));
	} else if(!data || !data.pid || !data.title || !data.content) {
		return callback(new Error('invalid data'));
	} else if (!data.title || data.title.length < parseInt(meta.config.minimumTitleLength, 10)) {
		topics.emitTitleTooShortAlert(socket);
		return callback(new Error('title-too-short'));
	} else if (!data.content || data.content.length < parseInt(meta.config.minimumPostLength, 10)) {
		module.parent.exports.emitContentTooShortAlert(socket);
		return callback(new Error('content-too-short'));
	}

	postTools.edit(socket.uid, data.pid, data.title, data.content);
	callback();
};

SocketPosts.delete = function(socket, data, callback) {
	if(!data) {
		return callback(new Error('invalid data'));
	}

	postTools.delete(socket.uid, data.pid, function(err) {

		if(err) {
			return callback(err);
		}

		module.parent.exports.emitTopicPostStats();

		index.server.sockets.in('topic_' + data.tid).emit('event:post_deleted', {
			pid: data.pid
		});
		callback();
	});
};

SocketPosts.restore = function(socket, data, callback) {
	if(!data) {
		return callback(new Error('invalid data'));
	}

	postTools.restore(socket.uid, data.pid, function(err) {
		if(err) {
			return callback(err);
		}

		module.parent.exports.emitTopicPostStats();

		index.server.sockets.in('topic_' + data.tid).emit('event:post_restored', {
			pid: data.pid
		});

		callback();
	});
};

SocketPosts.getPrivileges = function(socket, pid, callback) {
	postTools.privileges(pid, socket.uid, function(err, privileges) {
		if(err) {
			return callback(err);
		}
		privileges.pid = parseInt(pid);
		callback(null, privileges);
	});
};

SocketPosts.getFavouritedUsers = function(socket, pid, callback) {

	favourites.getFavouritedUidsByPids([pid], function(data) {
		var max = 5; //hardcoded
		var usernames = "";

		var pid_uids = data[pid];
		var rest_amount = 0;
		if (data.hasOwnProperty(pid) && pid_uids.length > 0) {
			if (pid_uids.length > max) {
				rest_amount = pid_uids.length - max;
				pid_uids = pid_uids.slice(0, max);
			}
			user.getUsernamesByUids(pid_uids, function(result) {
				usernames = result.join(', ') + (rest_amount > 0
					? " and " + rest_amount + (rest_amount > 1 ? " others" : " other")
					: "");
				callback(null, usernames);
			});
		} else {
			callback(null, "");
		}
	});
};

SocketPosts.getPidPage = function(socket, pid, callback) {
	posts.getPidPage(pid, callback);
}

module.exports = SocketPosts;