// Dependencies.
var express = require('express');
var http = require('http');
var path = require('path');
var socketIO = require('socket.io');
const Crypto = require('crypto')

var app = express();
var server = http.Server(app);
var io = socketIO(server);

app.set('port', 5000);
app.use('/static', express.static(__dirname + '/static'));

// Routing
app.get('/', function(request, response) {
  response.sendFile(path.join(__dirname, 'index.html'));
});
app.get('/register', function(request, response) {
  response.sendFile(path.join(__dirname, 'register.html'));
});

server.listen(5000, function() {
  console.log('Starting server on port 5000');
});

var gameState = {
    "words" : GetWords(),
    "players" : GetPlayers(),
    "turn" : 0,
    "side" : "red"
};

io.on('connection', function(socket) {
  socket.on('register', function(data) {
    AddPlayer(socket, data)
  });

  socket.on('validate session', function(data)
  {
    ValidateSession(socket, data)
  });

  socket.on('chose word', SelectWord);
});

setInterval(function() {
  io.sockets.emit('state', gameState);
}, 1000 / 5);

function SelectWord(data)
{
    // TODO: add check that it is the correct user turn
    correctPlayer = false;
    for (var i = 0; i < gameState.players[gameState.side].length; i++)
    {
        if (gameState.players[gameState.side][i].session_id == data.player)
        {
            correctPlayer = true;
            break;
        }
    }

    if (!correctPlayer)
    {
        return;
    }

    // Change selected word to visible
    for (var i = 0; i < gameState.words.length; i++)
    {
        if (players.words[i].text == data.word)
        {
            gameState.words[i].state = "visible";
            gameState.turn += 1

            // Logic for turn sides
            if (players.side == "red")
            {
                gameState.side = "blue";
            }
            else
            {
                gameState.side = "red";
            }
            return;
        }
    }

    console.log("Error in selecting word");
}

function GetWords()
{
    // colors taken from https://materializecss.com/color.html
    wordList = [
        {text:"a", state: "hidden", color:"red"},
        {text:"b", state: "hidden", color:"blue"},
        {text:"c", state: "hidden", color:"brown lighten-3"},
        {text:"d", state: "hidden", color:"red"},
        {text:"e", state: "hidden", color:"blue"},
        {text:"f", state: "hidden", color:"brown lighten-3"},
        {text:"g", state: "hidden", color:"red"},
        {text:"h", state: "hidden", color:"blue"},
        {text:"i", state: "hidden", color:"brown lighten-3"},
        {text:"j", state: "hidden", color:"red"},
        {text:"k", state: "hidden", color:"blue"},
        {text:"l", state: "hidden", color:"brown lighten-3"},
        {text:"m", state: "hidden", color:"red"},
        {text:"n", state: "hidden", color:"blue"},
        {text:"o", state: "hidden", color:"brown lighten-3"},
        {text:"p", state: "hidden", color:"red"},
        {text:"q", state: "hidden", color:"blue"},
        {text:"r", state: "hidden", color:"brown lighten-3"},
        {text:"s", state: "hidden", color:"red"},
        {text:"t", state: "hidden", color:"blue"},
        {text:"u", state: "hidden", color:"brown lighten-3"},
        {text:"v", state: "hidden", color:"red"},
        {text:"q", state: "hidden", color:"blue"},
        {text:"x", state: "hidden", color:"brown lighten-3"},
        {text:"y", state: "hidden", color:"blue-grey darken-4"},
    ]
    return wordList;
}

function GetPlayers()
{
    players = {
        "red" : [
            {"name" : "zohar", "ismaster" : true},
            {"name" : "zohar", "ismaster" : false},
            {"name" : "zohar", "ismaster" : false},
            {"name" : "zohar", "ismaster" : false},
        ],
        "blue" : [
            {"name" : "roee", "ismaster" : true},
            {"name" : "roee", "ismaster" : false},
            {"name" : "roee", "ismaster" : false},
            {"name" : "roee", "ismaster" : false},
        ]
    }

    return players
}

function AddPlayer(socket, name)
{
    var session_id = randomString(); //generating the sessions_id and then binding that socket to that sessions
    gameState.players.red.push({"name": name, "ismaster" : false, "session_id": session_id})

    socket.room = session_id;
    socket.join(socket.room, function(res)
    {
        console.log("joined successfully")
        socket.emit("set-session-acknowledgement", { sessionId: session_id })
    });

}

function randomString(size = 21) {
  return Crypto
    .randomBytes(size)
    .toString('base64')
    .slice(0, size)
}

function ValidateSession(socket, data)
{
    for (var i = 0; i < gameState.players["red"].length; i++)
    {
        if (gameState.players["red"][i].session_id == data.player)
        {
            correctPlayer = true;
            break;
        }
    }
    for (var i = 0; i < gameState.players["blue"].length; i++)
    {
        if (gameState.players["blue"][i].session_id == data.player)
        {
            correctPlayer = true;
            break;
        }
    }
}