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 ||
         !arr.hasOwnProperty("start") || !arr.hasOwnProperty("end")) {
             var result = {
                 start: {
                     expected: "number or string that can be cast to int",
                     got: arr.hasOwnProperty("start") ? typeof(arr.start) : undefined
                 },
                 end: {
                     expected: "number or string that can be cast to int",
                     got: arr.hasOwnProperty("end") ? typeof(arr.end) : undefined
                 }
             };
             socket.emit('update_required', result);
            return;
        }

        try {
            var start = parseInt(arr.start);
            var end = parseInt(arr.end);
            if(start < 0) {
                socket.emit("toast", "faulty_start_end");
                return;
            }
            if(end < 0) {
                socket.emit("toast", "faulty_start_end");
                return;
            }
            if(start >= end) {
                start = 0;
                arr.duration = end - start;
            }
        } catch(e) {
            return;
        }


        if(typeof(arr.id) != "string" || typeof(arr.start) != "number" ||
            typeof(arr.end) != "number" || typeof(arr.title) != "string" ||
            typeof(arr.list) != "string" || typeof(arr.duration) != "number" ||
            typeof(arr.playlist) != "boolean" || typeof(arr.num) != "number" ||
            typeof(arr.total) != "number") {
                var result = {
                    start: {
                        expected: "number or string that can be cast to int",
                        got: arr.hasOwnProperty("start") ? typeof(arr.start) : undefined
                    },
                    end: {
                        expected: "number or string that can be cast to int",
                        got: arr.hasOwnProperty("end") ? typeof(arr.end) : undefined
                    },
                    title: {
                        expected: "string",
                        got: arr.hasOwnProperty("title") ? typeof(arr.title) : undefined
                    },
                    list: {
                        expected: "string",
                        got: arr.hasOwnProperty("list") ? typeof(arr.list) : undefined
                    },
                    duration: {
                        expected: "number or string that can be cast to int",
                        got: arr.hasOwnProperty("duration") ? typeof(arr.duration) : undefined
                    },
                    playlist: {
                        expected: "boolean",
                        got: arr.hasOwnProperty("playlist") ? typeof(arr.playlist) : undefined
                    },
                    num: {
                        expected: "number or string that can be cast to int",
                        got: arr.hasOwnProperty("num") ? typeof(arr.num) : undefined
                    },
                    total: {
                        expected: "number or string that can be cast to int",
                        got: arr.hasOwnProperty("total") ? typeof(arr.total) : undefined
                    },
                    pass: {
                        expected: "string",
                        got: arr.hasOwnProperty("pass") ? typeof(arr.pass) : undefined
                    },
                    adminpass: {
                        expected: "string",
                        got: arr.hasOwnProperty("adminpass") ? typeof(arr.adminpass) : undefined
                    }
                };
                socket.emit('update_required', result);
                return;
            }
        coll = coll.replace(/ /g,'');
        Functions.getSessionAdminUser(Functions.getSession(socket), coll, function(userpass, adminpass) {
            arr.adminpass = adminpass;
            arr.userpass = userpass;
            db.collection(coll + "_settings").find(function(err, docs){
                if(docs.length > 0 && (docs[0].userpass == undefined || docs[0].userpass == "" || (arr.hasOwnProperty('pass') && docs[0].userpass == crypto.createHash('sha256').update(Functions.decrypt_string(socketid, arr.pass)).digest("base64")))) {

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

                    var id = arr.id;
                    var title = arr.title;
                    var hash = Functions.hash_pass(Functions.hash_pass(Functions.decrypt_string(socketid, arr.adminpass), true));
                    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 + "_settings").find(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;
                                        }
                                        var new_song = {"added": added,"guids":guids,"id":id,"now_playing":np,"title":title,"votes":votes, "duration":duration, "start": parseInt(start), "end": parseInt(end), "type": "video"};
                                        db.collection(coll).update({id: id}, new_song, {upsert: true}, function(err, docs){
                                            new_song._id = "asd";
                                            if(np) {
                                                List.send_list(coll, undefined, false, true, false);
                                                db.collection(coll + "_settings").update({ id: "config" }, {$set:{startTime: Functions.get_time()}});
                                                List.send_play(coll, undefined);
                                                Frontpage.update_frontpage(coll, id, title);
                                                if(!full_list) Search.get_correct_info(new_song, coll, false);
                                            } else {
                                                io.to(coll).emit("channel", {type: "added", value: new_song});
                                                if(!full_list) Search.get_correct_info(new_song, coll, true);
                                            }
                                            db.collection("frontpage_lists").update({_id:coll}, {$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,
                                        "start": start,
                                        "end": end,
                                        "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 {
        var result = {
            arr: {
                expected: "object",
                got: typeof(arr)
            },
            duration: {
                expected: "number or string that can be cast to int",
                got: arr.hasOwnProperty("duration") ? typeof(arr.duration) : undefined,
            }
        };
        socket.emit('update_required', result);
    }
}

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

        if(!msg.hasOwnProperty("channel") || !msg.hasOwnProperty("id") ||
            !msg.hasOwnProperty("type") || typeof(msg.channel) != "string" ||
            typeof(msg.id) != "string" || typeof(msg.type) != "string") {
                var result = {
                    channel: {
                        expected: "string",
                        got: msg.hasOwnProperty("channel") ? typeof(msg.channel) : undefined,
                    },
                    id: {
                        expected: "string",
                        got: msg.hasOwnProperty("id") ? typeof(msg.id) : undefined,
                    },
                    type: {
                        expected: "string",
                        got: msg.hasOwnProperty("type") ? typeof(msg.type) : undefined,
                    },
                    adminpass: {
                        expected: "adminpass",
                        got: msg.hasOwnProperty("adminpass") ? typeof(msg.adminpass) : undefined,
                    },
                    pass: {
                        expected: "string",
                        got: msg.hasOwnProperty("pass") ? typeof(msg.pass) : undefined,
                    },
                };
                socket.emit('update_required', result);
                return;
            }
        coll = msg.channel.toLowerCase().replace(/ /g,'');
        Functions.getSessionAdminUser(Functions.getSession(socket), coll, function(userpass, adminpass) {
            msg.adminpass = adminpass;
            msg.pass = userpass;

            db.collection(coll + "_settings").find({id: "config"}, function(err, docs){
                if(docs.length > 0 && (docs[0].userpass == undefined || docs[0].userpass == "" || (msg.hasOwnProperty('pass') && docs[0].userpass == crypto.createHash('sha256').update(Functions.decrypt_string(socketid, msg.pass)).digest("base64")))) {

                    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.hash_pass(Functions.decrypt_string(socketid, msg.adminpass), true));
                        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 {
        var result = {
            msg: {
                expected: "object",
                got: typeof(msg)
            }
        };
        socket.emit('update_required', result);
    }
}

function shuffle(msg, coll, guid, offline, socket) {
    var socketid = socket.zoff_id;


    if(!msg.hasOwnProperty("channel") || typeof(msg.channel) != "string") {
            var result = {
                channel: {
                    expected: "string",
                    got: msg.hasOwnProperty("channel") ? typeof(msg.channel) : undefined,
                },
                adminpass: {
                    expected: "string",
                    got: msg.hasOwnProperty("adminpass") ? typeof(msg.adminpass) : undefined,
                },
                pass: {
                    expected: "string",
                    got: msg.hasOwnProperty("pass") ? typeof(msg.pass) : undefined,
                },
            };
            socket.emit('update_required', result);
            return;
        }
    coll = msg.channel.toLowerCase().replace(/ /g,'');

    Functions.getSessionAdminUser(Functions.getSession(socket), coll, function(userpass, adminpass) {
        msg.adminpass = adminpass;
        msg.pass = userpass;
        db.collection("timeout_api").find({
            type: "shuffle",
            guid: coll,
        }, function(err, docs) {
            if(docs.length > 0) {
                var date = new Date(docs[0].createdAt);
                date.setSeconds(date.getSeconds() + 5);
                var now = new Date();
                var retry_in = (date.getTime() - now.getTime()) / 1000;
                if(retry_in > 0) {
                    socket.emit("toast", "wait_longer");
                    return;
                }
            }
            var now_date = new Date();
            db.collection("timeout_api").update({type: "shuffle", guid: coll}, {
                $set: {
                    "createdAt": now_date,
                    type: "shuffle",
                    guid: coll,
                },
            }, {upsert: true}, function(err, docs) {
                Functions.check_inlist(coll, guid, socket, offline);
                var hash;
                if(msg.adminpass === "") hash = msg.adminpass;
                else hash = Functions.hash_pass(Functions.hash_pass(Functions.decrypt_string(socketid, msg.adminpass),true));
                db.collection(coll + "_settings").find(function(err, docs){
                    if(docs.length > 0 && (docs[0].userpass == undefined || docs[0].userpass == "" || (msg.hasOwnProperty('pass') && docs[0].userpass == crypto.createHash('sha256').update(Functions.decrypt_string(socketid, msg.pass)).digest("base64")))) {
                        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);
                    }
                };
            });
        });
    });
}

function del(params, socket, socketid) {
    if(params.id){
        var coll = emojiStrip(params.channel).toLowerCase();
        coll = coll.replace("_", "").replace(/ /g,'');
        coll = encodeURIComponent(coll).replace(/\W/g, '');
        coll = filter.clean(coll);
        db.collection(coll + "_settings").find(function(err, docs){
            if(docs !== null && docs.length !== 0 && docs[0].adminpass == Functions.hash_pass(Functions.hash_pass(Functions.decrypt_string(socketid, params.adminpass),true)))
            {
                db.collection(coll).find({id:params.id}, function(err, docs){
                    var dont_increment = false;
                    if(docs[0]){
                        if(docs[0].type == "suggested"){
                            dont_increment = true;
                        }
                        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, count: {$gt: 0}}, {$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' ) {
        if(!msg.hasOwnProperty('channel') || typeof(msg.channel) != "string") {
                var result = {
                    channel: {
                        expected: "string",
                        got: msg.hasOwnProperty("channel") ? typeof(msg.channel) : undefined,
                    },
                    adminpass: {
                        expected: "adminpass",
                        got: msg.hasOwnProperty("adminpass") ? typeof(msg.adminpass) : undefined,
                    },
                    pass: {
                        expected: "string",
                        got: msg.hasOwnProperty("pass") ? typeof(msg.pass) : undefined,
                    },
                };
                socket.emit('update_required', result);
                return;
            }
            coll = coll.replace(/ /g,'');
            Functions.getSessionAdminUser(Functions.getSession(socket), coll, function(userpass, adminpass, gotten) {
                msg.adminpass = adminpass;
                msg.pass = userpass;
                var hash = Functions.hash_pass(Functions.hash_pass(Functions.decrypt_string(socketid, msg.adminpass),true));
                var hash_userpass = crypto.createHash('sha256').update(Functions.decrypt_string(socketid, msg.pass)).digest("base64");
                db.collection(coll + "_settings").find(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 {
        var result = {
            msg: {
                expected: "object",
                got: typeof(msg)
            },
        };
        socket.emit('update_required', result);
        return;
    }
}

function vote(coll, id, guid, socket, full_list, last) {
    coll = coll.replace(/ /g,'');
    db.collection(coll).find({id:id, now_playing: false, type:"video"}, 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;