function add_function(arr, coll, guid, offline, socket) {
    var socketid = socket.zoff_id;
    if(typeof(arr) === 'object' && arr !== undefined && arr !== null && arr !== "" && !isNaN(parseInt(arr.duration)))
    {

        if(coll == "" || coll == undefined || coll == null) {
            socket.emit("update_required");
            return;
        }

        db.collection(coll).find({views:{$exists:true}}, function(err, docs){
            if(docs.length > 0 && (docs[0].userpass == undefined || docs[0].userpass == "" || (arr.hasOwnProperty('pass') && docs[0].userpass == Functions.decrypt_string(socketid, arr.pass)))) {

                Functions.check_inlist(coll, guid, socket, offline);

                var id = arr.id;
                var title = arr.title;
                var hash = Functions.hash_pass(Functions.decrypt_string(socketid, arr.adminpass));
                var duration = parseInt(arr.duration);
                var full_list = arr.playlist;
                var last = arr.num == arr.total - 1;
                var num = arr.num;
                var total = arr.total;
                db.collection(coll).find({views:{$exists:true}}, function(err, docs)
                {
                    conf = docs;
                    if(docs !== null && docs.length !== 0 && ((docs[0].addsongs === true && (hash == docs[0].adminpass || docs[0].adminpass === "")) ||
                    docs[0].addsongs === false))
                    {
                        db.collection(coll).find({id:id, type:{$ne:"suggested"}}, function(err, docs){
                            if(docs !== null && docs.length === 0)
                            {
                                var guids = full_list === true ? [] : [guid];
                                var votes;
                                var added;
                                if(full_list) {
                                    var time = Functions.get_time()-total;
                                    time = time.toString();
                                    var total_len = total.toString().length;
                                    var now_len = num.toString().length;
                                    var to_add = num.toString();
                                    while(now_len < total_len) {
                                        to_add = "0" + to_add;
                                        now_len = to_add.length;
                                    }
                                    time = time.substring(0, time.length - total_len);
                                    time = time + to_add;
                                    time = parseInt(time);
                                    added = time;
                                    votes = 0;
                                } else {
                                    added = Functions.get_time();
                                    votes = 1;
                                }

                                db.collection(coll).find({now_playing:true}, function(err, docs){
                                    if((docs !== null && docs.length === 0)){
                                        np = true;
                                        if(full_list && num === 0){
                                            np = true;
                                            time = time.toString();
                                            total += 1;
                                            var total_len = total.toString().length;
                                            var now_len = total.toString().length;
                                            var to_add = total.toString();
                                            while(now_len < total_len) {
                                                to_add = "0" + to_add;
                                                now_len = to_add.length;
                                            }
                                            time = time.substring(0, time.length - total_len);
                                            time = parseInt(time).toString() + to_add;
                                            time = parseInt(time);
                                            added = time;
                                            votes = 0;
                                        } else if(full_list) {
                                            np = false;
                                        }
                                    } else {
                                        np = false;
                                    }
                                    db.collection(coll).update({id: id}, {"added": added,"guids":guids,"id":id,"now_playing":np,"title":title,"votes":votes, "duration":duration}, {upsert: true}, function(err, docs){
                                        if(np)
                                        {
                                            List.send_list(coll, undefined, false, true, false);
                                            db.collection(coll).update({views:{$exists:true}}, {$set:{startTime: Functions.get_time()}});
                                            List.send_play(coll, undefined);
                                            Frontpage.update_frontpage(coll, id, title);
                                        } else {
                                            io.to(coll).emit("channel", {type: "added", value: {"_id": "asd", "added":added,"guids":guids,"id":id,"now_playing":np,"title":title,"votes":votes, "duration":duration}});
                                        }
                                        db.collection("frontpage_lists").update({_id:coll}, {$inc:{count:1}, $set:{accessed: Functions.get_time()}}, {upsert:true}, function(err, docs){});
                                        List.getNextSong(coll);
                                    });
                                    if(!full_list) {
                                        socket.emit("toast", "addedsong");
                                    } else if(full_list && last) {
                                        socket.emit("toast", "addedplaylist");
                                    }
                                });
                            } else if(!full_list) {
                                ListChange.vote(coll, id, guid, socket, full_list, last);
                                if(full_list && last) {
                                    socket.emit("toast", "addedplaylist");
                                }
                            } else if(full_list && last) {
                                socket.emit("toast", "addedplaylist");
                            }
                        });
                    } else if(!full_list) {
                        db.collection(coll).find({id: id}, function(err, docs) {
                            if(docs.length === 0) {
                                db.collection(coll).update({id: id}, {$set:{
                                    "added":Functions.get_time(),
                                    "guids": [guid],
                                    "id":id,
                                    "now_playing": false,
                                    "title":title,
                                    "votes":1,
                                    "duration":duration,
                                    "type":"suggested"}
                                },
                                {upsert:true}, function(err, docs){
                                    socket.emit("toast", "suggested");
                                    io.to(coll).emit("suggested", {id: id, title: title, duration: duration});
                                });
                            } else if(docs[0].now_playing === true){
                                socket.emit("toast", "alreadyplay");
                            } else{
                                if(conf[0].vote === false) ListChange.vote(coll, id, guid, socket, full_list, last);
                                else socket.emit("toast", "listhaspass");
                            }
                        });
                    } else if (full_list){
                        if(arr.num == 0) {
                            socket.emit("toast", "listhaspass");
                        }
                    }
                });
            } else {
                socket.emit("auth_required");
            }
        });
    } else {
        socket.emit('update_required');
    }
}

function voteUndecided(msg, coll, guid, offline, socket) {
    var socketid = socket.zoff_id;
    if(typeof(msg) === 'object' && msg !== undefined && msg !== null){

        if(coll == "" || coll == undefined || coll == null || !msg.hasOwnProperty("adminpass") || !msg.hasOwnProperty("pass") || !msg.hasOwnProperty("id")) {
            socket.emit("update_required");
            return;
        }

        db.collection(coll).find({views:{$exists:true}}, function(err, docs){
            if(docs.length > 0 && (docs[0].userpass == undefined || docs[0].userpass == "" || (msg.hasOwnProperty('pass') && docs[0].userpass == Functions.decrypt_string(socketid, msg.pass)))) {

                Functions.check_inlist(coll, guid, socket, offline);

                if(msg.type == "del")
                ListChange.del(msg, socket, socketid);
                else
                {
                    var id = msg.id;
                    var hash = Functions.hash_pass(Functions.decrypt_string(socketid, msg.adminpass));
                    db.collection(coll).find({views:{$exists:true}}, function(err, docs){
                        if(docs !== null && docs.length !== 0 && ((docs[0].vote === true && (hash == docs[0].adminpass || docs[0].adminpass === "")) ||
                        docs[0].vote === false))
                        {
                            ListChange.vote(coll, id, guid, socket, false, false);
                        }else{
                            socket.emit("toast", "listhaspass");
                        }
                    });
                }
            } else {
                socket.emit("auth_required");
            }
        });
    } else {
        socket.emit('update_required');
    }
}

function shuffle(msg, coll, guid, offline, socket) {
    var socketid = socket.zoff_id;
    if(msg.hasOwnProperty('adminpass') && msg.adminpass !== undefined && msg.adminpass !== null)
    {
        if(coll == "" || coll == undefined || coll == null) {
            socket.emit("update_required");
            return;
        }

        Functions.check_inlist(coll, guid, socket, offline);
        var hash;
        if(msg.adminpass === "") hash = msg.adminpass;
        else hash = Functions.hash_pass(Functions.decrypt_string(socketid, msg.adminpass));
        db.collection(coll).find({views:{$exists:true}}, function(err, docs){
            if(docs.length > 0 && (docs[0].userpass == undefined || docs[0].userpass == "" || (msg.hasOwnProperty('pass') && docs[0].userpass == Functions.decrypt_string(socketid, msg.pass)))) {
                if(docs !== null && docs.length !== 0 && ((docs[0].adminpass == hash || docs[0].adminpass === "") || docs[0].shuffle === false))
                {
                    db.collection(coll).find({now_playing:false}).forEach(function(err, docs){
                        if(!docs){
                            List.send_list(coll, undefined, false, true, false, true);
                            socket.emit("toast", "shuffled");

                            return;
                        }else{
                            num = Math.floor(Math.random()*1000000);
                            db.collection(coll).update({id:docs.id}, {$set:{added:num}});
                        }
                    });
                }else
                socket.emit("toast", "wrongpass");
            } else {
                socket.emit("auth_required");
            }
        });

        var complete = function(tot, curr){
            if(tot == curr)
            {
                List.send_list(coll, undefined, false, true, false);
                List.getNextSong(coll);
            }
        };

    }else
    socket.emit("toast", "wrongpass");
}

function del(params, socket, socketid) {
    if(params.id){
        var coll = emojiStrip(params.channel).toLowerCase();
        coll = coll.replace("_", "");
        coll = encodeURIComponent(coll).replace(/\W/g, '');
        coll = filter.clean(coll);
        db.collection(coll).find({views:{$exists:true}}, function(err, docs){
            if(docs !== null && docs.length !== 0 && docs[0].adminpass == Functions.hash_pass(Functions.decrypt_string(socketid, params.adminpass)))
            {
                db.collection(coll).find({id:params.id}, function(err, docs){
                    dont_increment = true;
                    if(docs[0]){
                        if(docs[0].type == "suggested"){
                            dont_increment = false;
                        }
                        db.collection(coll).remove({id:params.id}, function(err, docs){
                            socket.emit("toast", "deletesong");
                            io.to(coll).emit("channel", {type:"deleted", value: params.id});
                            if(dont_increment) db.collection("frontpage_lists").update({_id: coll}, {$inc: {count: -1}, $set:{accessed: Functions.get_time()}}, {upsert: true}, function(err, docs){});
                        });
                    }
                });

            }
        });
    }
}

function delete_all(msg, coll, guid, offline, socket) {
    var socketid = socket.zoff_id;
    if(typeof(msg) == 'object' && msg.hasOwnProperty('channel') && msg.hasOwnProperty('adminpass') && msg.hasOwnProperty('pass')) {
        var hash = Functions.hash_pass(Functions.decrypt_string(socketid, msg.adminpass));
        var hash_userpass = Functions.decrypt_string(socketid, msg.pass);

        db.collection(coll).find({views: {$exists: true}}, function(err, conf) {
            if(conf.length == 1 && conf) {
                conf = conf[0];
                if(conf.adminpass == hash && conf.adminpass != "" && (conf.userpass == "" || conf.userpass == undefined || (conf.userpass != "" && conf.userpass != undefined && conf.pass == hash_userpass))) {
                    db.collection(coll).remove({views: {$exists: false}}, {multi: true}, function(err, succ) {
                        List.send_list(coll, false, true, true, true);
                        db.collection("frontpage_lists").update({_id: coll}, {$set: {count: 0, accessed: Functions.get_time()}}, {upsert: true}, function(err, docs) {});
                        socket.emit("toast", "deleted_songs");
                    });
                } else {
                    socket.emit("toast", "listhaspass");
                }
            }
        });
    } else {
        socket.emit("update_required");
        return;
    }
}

function vote(coll, id, guid, socket, full_list, last) {
    db.collection(coll).find({id:id, now_playing: false}, function(err, docs){
        if(docs !== null && docs.length > 0 && !Functions.contains(docs[0].guids, guid))
        {
            db.collection(coll).update({id:id}, {$inc:{votes:1}, $set:{added:Functions.get_time()}, $push :{guids: guid}}, function(err, docs)
            {
                if((full_list && last) || (!full_list))
                socket.emit("toast", "voted");
                io.to(coll).emit("channel", {type: "vote", value: id, time: Functions.get_time()});

                List.getNextSong(coll);
            });
        }else
        {
            socket.emit("toast", "alreadyvoted");
        }
    });
}

module.exports.add_function = add_function;
module.exports.voteUndecided = voteUndecided;
module.exports.shuffle = shuffle;
module.exports.del = del;
module.exports.delete_all = delete_all;
module.exports.vote = vote;
