class Game {
  constructor() {
    this.mapInstance = null;
    this.level = 0;
    this.lives = 10;
    this.points = 0;
    this.totalMoves = 0;
    this.levelMoves = {};
  }

  initializeLevel() {
    this.mapInstance = new Map();
    this.mapInstance.generateMapArray();
    this.loop();
  }

  loop() {
    this.mapInstance.display();
    this.mapInstance.getKeystroke();
    // this.mapInstance.waitForInput();
    // this.mapInstance.checkWinCondition();
  }

  handlePoints() { }
}

class Map {
  constructor() {
    this.level = g.level;
    this.levelMap = levels[this.level][0];
    this.levelPar = levels[this.level][1];
    this.mapArray = [];
    this.storageLocations = [];

    this.playerX = null;
    this.playerY = null;
    this.playerDir = 'f'
    this.previousElement = " ";

    this.win = false;
    this.lose = false;
    this.breakCondition = true;

    this.totalWin = g.level + 1 == levels.length;
    this.finalPointsGiven = false;
  }

  generateMapArray() {
    g.levelMoves[this.level] = 0;
    let levelArray = this.levelMap.split("\n");

    for (let i = 0; i < levelArray.length; i++) {
      if (i === 0 || i === levelArray.length - 1) {
        continue;
      }

      let rowElements = levelArray[i].split("");

      if (rowElements.includes("@")) {
        this.playerY = i - 1;
        this.playerX = rowElements.indexOf("@");
      }

      let storageTypes = [".", "*"];
      for (let j = 0; j < storageTypes.length; j++) {
        if (rowElements.includes(storageTypes[j])) {
          for (let k = 0; k < rowElements.length; k++) {
            if (rowElements[k] === storageTypes[j]) {
              this.storageLocations.push([i - 1, k]);
            }
          }
        }
      }
      this.mapArray.push(rowElements);
    }
  }

  getKeystroke() {
    var self = this;
    document.addEventListener('keydown', function(event) {
      if (event.key === 'h') {
        self.playerDir = 'l';
        self.move('left');
        self.display();
      } else if (event.key === 'j') {
        self.playerDir = 'f';
        self.move('down');
        self.display();
      } else if (event.key === 'k') {
        self.playerDir = 'b';
        self.move('up');
        self.display();
      } else if (event.key === 'l') {
        self.playerDir = 'r';
        self.move('right');
        self.display();
      }
    });
  }

  display() {
    for (let i = 0; i < this.storageLocations.length; i++) {
      if (this.mapArray[this.storageLocations[i][0]][this.storageLocations[i][1]] === ' ') {
        this.mapArray[this.storageLocations[i][0]][this.storageLocations[i][1]] = '.';
      }
    }

    let map = "";
    for (let i = 0; i < this.mapArray.length; i++) {
      for (let j = 0; j < this.mapArray[i].length; j++) {
        if (this.mapArray[i][j] === "#") {
          map += '<img src="assets/img/sprites/wall.png">';
        } else if (this.mapArray[i][j] === " ") {
          map += '<img src="assets/img/sprites/floor.png">';
        } else if (this.mapArray[i][j] === "0") {
          map += '<img src="assets/img/sprites/coal.png">';
        } else if (this.mapArray[i][j] === "*") {
          map += '<img src="assets/img/sprites/fire_coal.png">';
        } else if (this.mapArray[i][j] === "@") {
          map += `<img src="assets/img/sprites/char${this.playerDir}.png">`;
        } else if (this.mapArray[i][j] === ".") {
          map += '<img src="assets/img/sprites/grill.png">';
        }
      }
      map += "<br>";
    }

    let mapDiv = document.getElementById("map");
    mapDiv.innerHTML = '';
    mapDiv.innerHTML = map;
  }

  move(direction) {
    g.levelMoves[this.level] += 1;
    g.totalMoves += 1;

    let tmpPos = this.calculateFuturePosition(this.playerX, this.playerY, direction)

    let tmpX = tmpPos[0];
    let tmpY = tmpPos[1];

    let futurePosition = this.mapArray[tmpY][tmpX];

    if (!['#'].includes(futurePosition)) {
      let canMove = true;
      if (['0', '*'].includes(futurePosition)) {
        futurePosition = ' ';
        canMove = this.pushBoulder(tmpY, tmpX, direction);

      }

      if (canMove) {
        this.mapArray[this.playerY][this.playerX] = this.previousElement;
        this.previousElement = futurePosition;
        this.mapArray[tmpY][tmpX] = '@';
        this.playerX = tmpX;
        this.playerY = tmpY;
      }
    }
  }

  calculateFuturePosition(x, y, direction) {
    let dirList = direction.split(' ');

    if (dirList.includes('right')) {
      x += 1
    } else if (dirList.includes('left')) {
      x -= 1
    }

    if (dirList.includes('down')) {
      y += 1
    } else if (dirList.includes('up')) {
      y -= 1
    }

    return [x, y]

  }

  pushBoulder(tmpY, tmpX, direction) {
    if (direction.split(' ').length > 1) {
      return false
    }

    let tmpBoulderPos = this.calculateFuturePosition(tmpX, tmpY, direction);
    let tmpBoulderX = tmpBoulderPos[0];
    let tmpBoulderY = tmpBoulderPos[1];

    let futurePosition = this.mapArray[tmpBoulderY][tmpBoulderX];

    if (!['#', '0', '*'].includes(futurePosition)) {
      if (futurePosition == '.') {
        this.mapArray[tmpBoulderY][tmpBoulderX] = '*'
      } else {
        this.mapArray[tmpBoulderY][tmpBoulderX] = '0'
      }

      return true
    } else {
      return false
    }


  }
}

let levels = microban_levels;
let g = new Game();
g.initializeLevel();