var _listener;

class Game {
  constructor() {
    this.mapInstance = null;
    this.level = 1;
    this.lives = 10;
    this.points = 0;
    this.totalMoves = 0;
    this.levelMoves = {};
  }

  initializeLevel() {
    document.removeEventListener("keydown", _listener);
    this.mapInstance = new Map();
    this.mapInstance.getKeystroke();
    this.mapInstance.generateMapArray();
    this.mapInstance.display();
  }

  reset() {
    document.removeEventListener("keydown", _listener);
    g.levelMoves[this.level] = 0;
    this.lives -= 1;
    // handle points
    this.initializeLevel();
  }

  continue() {}

  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;
    _listener = function (event) {
      var dontLoop = false;
      if (event.key === "h" || event.key === "a" || event.key === "ArrowLeft") {
        self.move("left");
      } else if (
        event.key === "j" ||
        event.key === "s" ||
        event.key === "ArrowDown"
      ) {
        self.move("down");
      } else if (
        event.key === "k" ||
        event.key === "w" ||
        event.key === "ArrowUp"
      ) {
        self.move("up");
      } else if (
        event.key === "l" ||
        event.key === "d" ||
        event.key === "ArrowRight"
      ) {
        self.move("right");
      } else if (event.key === "r") {
        dontLoop = true;
        g.reset();
      } else if (event.key === "c" && self.win) {
        dontLoop = true;
        self.continue();
      }
      if (!dontLoop) {
        self.loop();
      }
    };
    document.addEventListener("keydown", _listener);
  }

  loop() {
    this.display();
    this.checkWin();
    document.removeEventListener("keydown", _listener);
    this.getKeystroke();
  }

  display() {
    let grillChar = false;
    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]
        ] = ".";
      }

      if (
        this.mapArray[this.storageLocations[i][0]][
          this.storageLocations[i][1]
        ] === "@"
      ) {
        grillChar = true;
      }
    }

    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] === "@") {
          if (!grillChar) {
            map += `<img src="assets/img/sprites/char${this.playerDir}.png">`;
          } else {
            map += `<img src="assets/img/sprites/grill-char${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;

    let statsDiv = document.getElementById("stats");
    statsDiv.innerHTML = `LEVEL: ${this.level}/155 | MOVES: ${g.levelMoves[this.level]}`;
  }

  move(direction) {
    if (direction === "left") {
      this.playerDir = "l";
    } else if (direction === "right") {
      this.playerDir = "r";
    } else if (direction === "down") {
      this.playerDir = "f";
    } else {
      this.playerDir = "b";
    }
    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;
    }
  }

  checkWin() {
    this.win = true;
    for (let y = 0; y < this.mapArray.length; y++) {
      for (let x = 0; x < this.mapArray[y].length; x++) {
        if (this.mapArray[y][x] === "0") {
          if (!this.storageLocations.includes([x, y])) {
            this.win = false;
          }
        }
      }
    }
    let continueLink = document.getElementById("continueLink");
    if (this.win) {
      continueLink.classList.remove("disabled");
    } else {
      continueLink.classList.add("disabled");
    }
  }

  continue() {
    g.level += 1;
    g.initializeLevel();
    let continueLink = document.getElementById("continueLink");
    continueLink.classList.add("disabled");
  }
}

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