var noise = require('noisejs');
var express = require('express');

const gridSize = [18, 18];
const perlinScale = 3;
var world = generateWorld();

var app = express() //Static resources server
app.use(express.static(__dirname + '/www/'));var server = app.listen(8082, function () {
    var port = server.address().port;
    console.log('Server running at port %s', port);
});

var io = require('socket.io')(server);/* Connection events */
io.on('connection', function(client) {
    console.log('User connected');
    client.on('joinGame', function(tank){
        console.log(client.id + ' joined the game');

        // client.emit('addTank', { id: tank.id, type: tank.type, isLocal: true, x: initX, y: initY, hp: TANK_INIT_HP });
        // client.broadcast.emit('addTank', { id: tank.id, type: tank.type, isLocal: false, x: initX, y: initY, hp: TANK_INIT_HP} );
        // game.addTank({ id: tank.id, type: tank.type, hp: TANK_INIT_HP});
        client.emit('gameVars', {gridSize: gridSize, world: world})
    })

      client.on('clickCanvas', function(data){
        const xu = data.tilePosition[0]
        const yu = data.tilePosition[1]
        world[xu][yu].structure = data.structure
        client.broadcast.emit('sync',{world: world})
        client.emit('sync',{world: world})
      })


  });




  function randomNumber(min, max) {
      return Math.floor(Math.random() * (max - min) + min);
  }

  function generateWorld(){
    let x, y = 0

    let tempWorld = Array.from(Array(gridSize[0]), () => new Array(gridSize[1]));
    for (x = 0; x < gridSize[0]; x++){
      for (y = 0; y < gridSize[1]; y++){
        tempWorld[x][y] = {type: 0, structure: 0}
      }
    }

    noise.seed(Math.random())
    for(x = 0; x < gridSize[0]; x++){
      for(y = 0; y < gridSize[1]; y++){

        var value = (noise.perlin2(x/perlinScale, y/perlinScale))*10;
        if (value >= -3) {
          tempWorld[x][y].type = 0
        } else if (value < -3) {
          tempWorld[x][y].type = 1
        }
        if (value > 1.4) {
          tempWorld[x][y].type = 2
        }

      }
    }
    for (i = 0; i < gridSize[0]*gridSize[1]/15; i){
      x = randomNumber(0,gridSize[0]);
      y = randomNumber(0,gridSize[1]);
      if (tempWorld[x][y].type != 1) {
        i++;
        tempWorld[x][y].structure = 1
      }
    }
    return tempWorld;
  }