var models = require('../models'),
	Message = models.Message;

var user_ctrl = require('./user');
var mail_ctrl = require('./mail');
var topic_ctrl = require('./topic'); 

var EventProxy = require('eventproxy').EventProxy;

exports.index = function(req,res,next){
	if(!req.session.user){
		res.redirect('home');
		return;
	}

	var message_ids = [];
	var user_id = req.session.user._id;
	Message.find({master_id:user_id},[],{sort:[['create_at','desc']]},function(err,docs){
		if(err) return next(err);
		for(var i=0; i<docs.length; i++){
			message_ids.push(docs[i]._id);
		}
		var messages = [];
		if(message_ids.length == 0){
			res.render('message/index',{has_read_messages:[],hasnot_read_messages:[]});
			return;
		}
		var proxy = new EventProxy();
		var render = function(){
			var has_read_messages = [];
			var hasnot_read_messages = [];
			for(var i=0; i<messages.length; i++){
				if(messages[i].is_invalid){
					messages[i].remove();
				}else{
					if(messages[i].has_read){
						has_read_messages.push(messages[i]);
					}else{
						hasnot_read_messages.push(messages[i]);
					}
				}
			}
			res.render('message/index',{has_read_messages:has_read_messages,hasnot_read_messages:hasnot_read_messages});
			return;
		};
		proxy.after('message_ready',message_ids.length,render);
		for(var i=0; i<message_ids.length; i++){
			(function(i){
				get_message_by_id(message_ids[i],function(err,message){
					if(err) return next(err);
					messages[i] = message;
					proxy.trigger('message_ready');
				});
			})(i);
		}
	});
};

exports.mark_read = function(req,res,next){
	if(!req.session || !req.session.user){
		res.send('forbidden!');
		return;
	}

	var message_id = req.body.message_id;
	Message.findOne({_id:message_id},function(err,message){
		if(err) return next(err);
		if(!message){
			res.json({status:'failed'});
			return;
		}
		if(message.master_id.toString() != req.session.user._id.toString()){
			res.json({status:'failed'});
			return;
		}
		message.has_read = true;
		message.save(function(err){
			if(err) return next(err);
			res.json({status:'success'});
		});
	});	
};

exports.mark_all_read = function(req,res,next){
	if(!req.session || !req.session.user){
		res.send('forbidden!');
		return;
	}

	Message.find({master_id:req.session.user._id,has_read:false},function(err,messages){
		if(messages.length == 0){
			res.json({'status':'success'});	
			return;
		}
		var proxy = new EventProxy();
		var done = function(){
			res.json({'status':'success'});	
		}
		proxy.after('marked',messages.length,done);
		for(var i=0; i<messages.length; i++){
			var message = messages[i];	
			message.has_read = true;
			message.save(function(err){
				proxy.trigger('marked');
			});
		}
	});	
};

function send_reply_message(master_id,author_id,topic_id){
	var message = new Message();
	message.type = 'reply';
	message.master_id = master_id;
	message.author_id = author_id;
	message.topic_id = topic_id;
	message.save(function(err){
		user_ctrl.get_user_by_id(master_id,function(err,master){
			if(master && master.receive_reply_mail){
				message.has_read = true;
				message.save();
				get_message_by_id(message._id,function(err,msg){
					mail_ctrl.send_reply_mail(master.email,msg);
				});
			}
		});
	});
}

function send_reply2_message(master_id,author_id,topic_id){
	var message = new Message();
	message.type = 'reply2';
	message.master_id = master_id;
	message.author_id = author_id;
	message.topic_id = topic_id;
	message.save(function(err){
		user_ctrl.get_user_by_id(master_id,function(err,master){
			if(master && master.receive_reply_mail){
				message.has_read = true;
				message.save();
				get_message_by_id(message._id,function(err,msg){
					mail_ctrl.send_reply_mail(master.email,msg);
				});
			}
		});
	});
}

function send_at_message(master_id,author_id,topic_id){
	var message = new Message();
	message.type = 'at';
	message.master_id = master_id;
	message.author_id = author_id;
	message.topic_id = topic_id;
	message.save(function(err){
		user_ctrl.get_user_by_id(master_id,function(err,master){
			if(master && master.receive_at_mail){
				message.has_read = true;
				message.save();
				get_message_by_id(message._id,function(err,msg){
					mail_ctrl.send_at_mail(master.email,msg);
				});
			}
		});
	});
}

function send_follow_message(follow_id,author_id){
	var message = new Message();
	message.type = 'follow';
	message.master_id = follow_id;
	message.author_id = author_id;
	message.save();
}

function get_message_by_id(id,cb){
	Message.findOne({_id:id},function(err,message){
		if(err) return cb(err);
		if(message.type == 'reply' || message.type == 'reply2' || message.type == 'at'){
			var proxy = new EventProxy();
			var done = function(author,topic){
				message.author = author;
				message.topic = topic;
				if( !author || !topic){
					message.is_invalid =true;
				}
				return cb(err,message);	
			}
			proxy.assign('author_found','topic_found',done);
			user_ctrl.get_user_by_id(message.author_id,function(err,author){
				if(err) return cb(err);
				proxy.trigger('author_found',author);
			});
			topic_ctrl.get_topic_by_id(message.topic_id,function(err,topic,tags,author){
				if(err) return cb(err);
				proxy.trigger('topic_found',topic);
			});
		}
		if(message.type == 'follow'){
			user_ctrl.get_user_by_id(message.author_id,function(err,author){
				if(err) return cb(err);
				message.author = author;
				if(!author){
					message.is_invalid =true;
				}
				return cb(err,message);
			});
		}
	});
}

function get_messages_count(master_id,cb){
	Message.count({master_id:master_id,has_read:false},function(err,messages_count){
		if(err) return cb(err);
		return cb(err,messages_count);
	});
};
exports.get_messages_count = get_messages_count;
exports.send_reply_message = send_reply_message;
exports.send_reply2_message = send_reply2_message;
exports.send_follow_message = send_follow_message;
exports.send_at_message = send_at_message;