let addButton = document.getElementById("a");
let deleteButton = document.getElementById("b");
let changeTickButton = document.getElementById("c");
let changeIdButton = document.getElementById("d");
let reloadButton = document.getElementById("e");
var players = [];
let Id = Math.floor(Math.random()*10000000000000000).toString(16)
var ws = new WebSocket("ws:10.9.1.129:8080/" + Id);
document.getElementById("p4").innerHTML = "" + Id;


/* Handles Events from Server */
ws.onmessage = function(evt){
        var msg = evt.data;
        var obj = JSON.parse(msg);
        var valid = false;

        /*Changes Tick of one Player in players. Updates the Playerlist and current Player.*/
        if (obj.eventType == "SetPlayerTickE") {
            valid = true;
            for (i = 0; i < players.length; i++){
                if (players[i].UUID == obj.playerUUID){
                    players[i].Tick = obj.tick;
                }
            }
            PlayerList();
            CurrentPlayer();
        }
        /*Adds Player and their Tick to players. Updates the Playerlist and current Player.*/
        if (obj.eventType == "AddPlayerTickE") {
            valid = true;
            var newPlayer = new Object ();
            newPlayer.Name = obj.playerName;
            newPlayer.UUID = obj.playerUUID;
            if (obj.tick.tickType == "Tick"){
            newPlayer.Tick = obj.tick.tickValue;
            }
            else {
            newPlayer.Tick = tickType;
            }
            players.push(newPlayer);
            PlayerList();
            CurrentPlayer();
        }
        /*Adds players an their Ticks to players. Updates the Playerlist and current Player.*/
        if (obj.eventType == "InitializeTickLeisteE") {
            valid = true;
            var newPlayer = new Object();
            for (i = 0; i<obj.tickLeiste.length;i++){
                newPlayer.Tick = obj.tickLeiste[i][0];
                newPlayer.UUID = obj.tickLeiste[i][0][0];
                newPlayer.Name = obj.tickLeiste[i][0][1];
            }
            players.push(newPlayer);
            PlayerList();
            CurrentPlayer();

        }
        /*Changes the Name of a Player in players. Updates the Playerlist and current Player*/
        if (obj.eventType == "ChangeNameE") {
            valid = true;
            for (i = 0; i < players.length; i++){
                if (players[i].UUID == obj.playerUUID){
                    players[i].Name = obj.playerName;
                }
            }
        }
        /*Removes one Player from players. Updates the Playerlist and current Player*/
        if (obj.eventType == "RemovePlayerE") {
            valid = true;
            for (i = 0; i < players.length; i++){
                if (players[i].UUID == obj.playerUUID){
                    players.splice(i,1);
                }
            }
            PlayerList();
            CurrentPlayer();
        }
        /*If no eventType was recognized, an error is thrown.*/
        if (valid == false) {
            console.error('Invalid Event received');
        }
}



/*When the Button is clicked, a AddPlayerTickR request is send to the server.*/
addButton.onclick = function() {
                        var type = "";
                        if (document.getElementById("A2").value == "Abwarten") {
                            type = "Abwarten";
                        }
                        if (document.getElementById("A2").value == "Bereithalten") {
                            type = "Bereithalten";
                        }
                        else {
                            type = "Tick";
                        }
                        ws.send('{"requestType" : "AddPlayerTickR", "playerName" : "' + document.getElementById("A").value + '"  , "tick" : {"tickType" : "' + type + '", "tickValue" : ' + document.getElementById("A2").value + '}}');
}

/*When the Button is clicked, a RemovePlayerR request is send to the server.*/
deleteButton.onclick = function() {
                        var UUID = "";
                        for (i = 0; i < players.length; i++){
                            if (players[i].Name == document.getElementById("B").value){
                                UUID = players[i].UUID;
                            }
                        }
                        ws.send('{"requestType" : "RemovePlayerR", "playerUUID" : "' + UUID + '"}');
                    }

/*When the Button is clicked, a SetPlayerTickR request is send to the server*/
changeTickButton.onclick = function() {
                        var UUID = "";
                        var Tick = document.getElementById("C2").value;
                        for (i = 0; i < players.length; i++){
                            if (players[i].Name == document.getElementById("C1")){
                                UUID = players[i].UUID;
                            }
                        }
                        ws.send('{"requestType" : "SetPlayerTickR", "playerUUID" : "' + UUID + '", "tick" : "' + Tick + '"}');
                     }

/*When the Button is clicked, a new WebSocket connection is opened with the new ID*/
changeIdButton.onclick = function() {
                        Id = document.getElementById("D").value;
                        ws.close();
                        ws = new WebSocket("ws:10.9.1.129:8080/" + Id);
                        document.getElementById("p4").innerHTML = "" + Id;
                    }

/*When the Button is clicked, a TickLeisteR request is send to the server.*/
reloadButton.onclick = function() {
                        ws.send('{"requestType" : "TickLeisteR"}');
                    }


/*Updates the Playerlist according to the content of players.*/
function PlayerList(){
                        var content = "";
                        for (i = 0; i < players.length; i++){
                            content = content + players[i].Name + "  " + players[i].Tick + "<br>";
                        }
                        document.getElementById("p3").innerHTML = content;
                    }

/*Updates the current Player according to the Player with the smallest Tick in players.*/                        
function CurrentPlayer(){
                        var curr = "-";
                        var smallest = Infinity;
                        for (i = 0; i < players.length; i++){
                            if (parseInt(players[i].Tick) < smallest){
                                smallest = parseInt(players[i].Tick);
                                curr = players[i].Name;
                            }
                        }
                        if (smallest != Infinity){
                            document.getElementById("p2").innerHTML = curr;
                            document.getElementById("p1").innerHTML = "" + smallest;
                        }
                    }