define(function(require, exports, module) {

  module.exports = Player;

  var Key = require("./key")

    , Direction = require("./direction")

    , Image = require("./image");

  function Player(game) {

    this.game = game;

    this.image = new Image("./assets/fighter.png");

    this.game.resources.add(this.image);

    this.x = 0;

    this.y = 0;

    this.pixelX = 0;

    this.pixelY = 0;

    this.animationStep = 0;

  }

  Player.prototype.update = function() {

    if (!this.isWalking()) {

      this.handleInput();

    }

    if (this.isWalking()) {

      // Increase the animation step.

      this.animationStep = ++this.animationStep % 60;

      if (this.x * 32 > this.pixelX) {

        this.pixelX++;

      } else if (this.x * 32 < this.pixelX) {

        this.pixelX--;

      }

      if (this.y * 32 > this.pixelY) {

        this.pixelY++;

      } else if (this.y * 32 < this.pixelY) {

        this.pixelY--;

      }

    } else {

      // Reset the animation step.

      this.animationStep = 0;

    }

  };

  Player.prototype.handleInput = function() {

    var keyboard = this.game.keyboard, finalAction, action, inputs = {

      'moveDown': keyboard.isDown(Key.DOWN),

      'moveUp': keyboard.isDown(Key.UP),

      'moveLeft': keyboard.isDown(Key.LEFT),

      'moveRight': keyboard.isDown(Key.RIGHT)

    };

    for (action in inputs) {

      if (inputs[action]) {

        if (!finalAction || inputs[finalAction] < inputs[action]) {

          finalAction = action;

        }

      }

    }

    this[finalAction] && this[finalAction]();

  };

  Player.prototype.isWalking = function() {

    return this.x * 32 != this.pixelX || this.y * 32 != this.pixelY;

  };

  Player.prototype.moveDown = function() {

    this.y += 1;

    this.direction = Direction.DOWN;

  };

  Player.prototype.moveUp = function() {

    this.y -= 1;

    this.direction = Direction.UP;

  };

  Player.prototype.moveLeft = function() {

    this.x -= 1;

    this.direction = Direction.LEFT;

  };

  Player.prototype.moveRight = function() {

    this.x += 1;

    this.direction = Direction.RIGHT;

  };

  Player.prototype.draw = function(context) {

    var offsetX = Math.floor(this.animationStep / 15) * 32, offsetY = 0;

    switch(this.direction) {

      case Direction.UP:

        offsetY = 48 * 3;

        break;

      case Direction.RIGHT:

        offsetY = 48 * 2;

        break;

      case Direction.LEFT:

        offsetY = 48;

        break;

    }

    context.drawImage(this.image.data, offsetX, offsetY, 32, 48, this.pixelX, this.pixelY - 16, 32, 48);

  };

});