'use strict';

var Missile = require('../prefabs/missile');
var Obstacle = require('../prefabs/obstacle');
var Protagonist = require('../prefabs/protagonist');

function Play() {}
Play.prototype = {
    create: function() {

      this.score = 0;
      this.scoreText = this.game.add.text(
          20, 20, '', { font: '20px Arial', fill: '#ffffff' }
      );
      this.scoreText.setText('0');

      //The hero of our game
      this.protagonist = new Protagonist(this.game, 20, 20);
      this.game.add.existing(this.protagonist);

      //Collect all missiles in this group
      this.missileGroup = this.game.add.group();

      //Create an obstacle that missiles can crash against
      this.obstacle = new Obstacle(this.game, this.game.width/2, this.game.height/2);
      this.game.add.existing(this.obstacle);

      // Simulate a pointer click/tap input at the center of the stage
      // when the example begins running.
      this.game.input.activePointer.x = this.game.width/2;
      this.game.input.activePointer.y = this.game.height/2 - 100;
    },
    update: function()
    {
      // If there are fewer than MAX_MISSILES, launch a new one
      if ((this.missileGroup.countLiving() < (this.score + 1)/4) && this.protagonist.alive == true)
      {
        // Set the launch point to a random location below the bottom edge of the stage
        this.launchMissile(this.game.rnd.integerInRange(50, this.game.width-50),this.game.height + 50);
      }

      // If any missile is within a certain distance of the mouse pointer, blow it up
      this.missileGroup.forEachAlive(function(m)
      {
        this.game.physics.arcade.collide(m, this.obstacle, this.missileDeathHandler, null, this);
        this.game.physics.arcade.collide(m, this.protagonist, this.protagonistDeathHandler, null, this);
        this.game.physics.arcade.collide(this.obstacle, this.protagonist, null, null, this);

        /* Expload when close to something e.g. the pointer
        var distance = this.game.math.distance(m.x, m.y,
            this.game.input.activePointer.x, this.game.input.activePointer.y);
        if (distance < 50) {
            m.kill();
            this.getExplosion(m.x, m.y);
        }
        */

      }, this);
    },
    protagonistDeathHandler: function(missile, protagonist)
    {
      missile.kill();
      protagonist.kill();
      //this.missileGroup.destroy();

      //TODO: Scoreboard
      //this.scoreboard = new Scoreboard(this.game);
      //this.game.add.existing(this.scoreboard);
      //this.scoreboard.show(this.score);
    },
    missileDeathHandler: function(missile)
    {
      if(missile.alive == true)
      {
        missile.kill();
        this.score++;
        this.scoreText.setText(this.score.toString());
      }
    },
    launchMissile: function(x, y)
    {
      // // Get the first dead missile from the missileGroup
      var missile = this.missileGroup.getFirstDead();

      // If there aren't any available, create a new one
      if (missile === null)
      {
          missile = new Missile(this.game);
          this.missileGroup.add(missile);
      }

      // Revive the missile (set it's alive property to true)
      // You can also define a onRevived event handler in your explosion objects
      // to do stuff when they are revived.
      missile.revive();

      // Move the missile to the given coordinates
      missile.x = x;
      missile.y = y;

      return missile;
    }
  };

  module.exports = Play;