// Setup the canvas
const canvas = document.getElementById('gameCanvas');
const ctx = canvas.getContext('2d');
canvas.width = 512;
canvas.height = 512;




// Create the player
const player = {
    x: 0,
    y: 0,
    width: 8,
    height: 8,
    step: 8,
    color: 'blue',
    spriteUrl: "chickadee.svg"
};

// If you wanna have a sprite, you need to create an image object
const playerSprite = new Image();
playerSprite.src = player.spriteUrl;

// Empty player inventory
player.inventory = [];

// Ability to collect items
player.collectItem = function(item) {
  this.inventory.push(item);
}





// MAP
const TILE_SIZE = 64;
// Create the map
const map = [
    [{ walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }],
    [{ walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }],
    [{ walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }],
    [{ walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }],
    [{ walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }],
    [{ walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }],
    [{ walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }],
    [{ walkable: true, color: 'pink' }, { walkable: false, color: 'grey' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }, { walkable: true, color: 'pink' }]
];




// ITEMS
// Define the Item object
function Item(name, x, y, type, color) {
  this.name = name;
  this.x = x;
  this.y = y;
  this.type = type;
  this.color = color;
}

// Create some bespoke items
let items = [
  new Item('helmet', 16, 16, 'clothes', 'red'),
  new Item('banana', 24, 128, 'food', 'yellow'),
  new Item('bucket', 128, 256, 'object', 'green'),
  new Item('big key', 216, 216, 'key', 'cyan'),
];


// Pushable items
// Define the PushableItem class
function PushableItem(x, y, width, height, color) {
  this.x = x;
  this.y = y;
  this.width = width;
  this.height = height;
  this.color = color;
}

// Create some pushable items
let pushableItems = [
  new PushableItem(24, 48, player.width, player.height, 'green'),
  new PushableItem(48, 24, player.width, player.height, 'green'),
];





// Funtion to display the player's stats, useful for debugging
function displayStats() {
  document.getElementById("stats").innerHTML = "";
  for (let stat in player) {
    if (typeof player[stat] === "string" || typeof player[stat] === "number") {
      document.getElementById("stats").innerHTML += stat + ": " + player[stat] + "<br>";
    }
  }
  document.getElementById("stats").innerHTML += "Inventory: ";
  for (let i = 0; i < player.inventory.length; i++) {
    document.getElementById("stats").innerHTML += player.inventory[i].name + ", ";
  }
}









// Game loop
function gameLoop() {
    // Clear the canvas
    ctx.clearRect(0, 0, canvas.width, canvas.height);

    // Draw the map
    for (let y = 0; y < map.length; y++) {
        for (let x = 0; x < map[y].length; x++) {
        ctx.fillStyle = map[y][x].color;

        // Draw the tile
        ctx.fillRect(x * TILE_SIZE, y * TILE_SIZE, TILE_SIZE, TILE_SIZE);

        // Draw the grid
        ctx.strokeStyle = 'white';
        ctx.lineWidth = 1;
        ctx.strokeRect(x * TILE_SIZE, y * TILE_SIZE, TILE_SIZE, TILE_SIZE);
        }
    }

    // Draw the player
    ctx.fillStyle = player.color;
    ctx.fillRect(player.x, player.y, player.width, player.height);
    ctx.fillRect(player.x, player.y, player.width, player.height);  
    // context.drawImage(playerSprite, player.x, player.y, player.width, player.height);
  

    // Draw items
    items.forEach(item => {
      ctx.fillStyle = item.color;
      ctx.fillRect(item.x, item.y, 8, 8);
    });

    for (let i = 0; i < items.length; i++) {
      if (player.x === items[i].x && player.y === items[i].y) {
          player.collectItem(items[i]);
          items.splice(i, 1); // Remove the item from the map
          i--;
      }
    }



    // Draw pushable items
    pushableItems.forEach(item => {
      ctx.fillStyle = item.color;
      ctx.fillRect(item.x, item.y, item.width, item.height);
    });

    // Handle pushable items
    // FIXME: this doesn't work correctly
    for (let i = 0; i < pushableItems.length; i++) {
      if (player.x === pushableItems[i].x && player.y === pushableItems[i].y) {
        // Calculate the tile coordinates
        const tileX = Math.floor(pushableItems[i].x / TILE_SIZE);
        const tileY = Math.floor(pushableItems[i].y / TILE_SIZE);

        // Calculate the new position
        let newX = pushableItems[i].x + player.step;
        let newY = pushableItems[i].y + player.step;

        // Check if the new tile is walkable
        if (map[tileY] && map[tileY][tileX] && map[tileY][tileX].walkable) {
          // Update the item's position
          pushableItems[i].x = newX;
          pushableItems[i].y = newY;
        }
      }
    }
    
    


    


    // Call the game loop again next frame
    requestAnimationFrame(gameLoop);
    displayStats();
}

// Start the game loop
gameLoop();

// Handle user input
window.addEventListener('keydown', (e) => {
    let newX = player.x;
    let newY = player.y;
  
    switch (e.key) {
      case 'ArrowUp':
        newY -= player.step;
        break;
      case 'ArrowDown':
        newY += player.step;
        break;
      case 'ArrowLeft':
        newX -= player.step;
        break;
      case 'ArrowRight':
        newX += player.step;
        break;
    }
  
    // Calculate the tile coordinates
    const tileX = Math.floor(newX / TILE_SIZE);
    const tileY = Math.floor(newY / TILE_SIZE);
  
    // Check if the new tile is walkable
    if (map[tileY] && map[tileY][tileX] && map[tileY][tileX].walkable) {
      // Update the player's position
      player.x = newX;
      player.y = newY;
    }
});


canvas.addEventListener('click', function(event) {
  // Calculate the mouse position
  var rect = canvas.getBoundingClientRect();
  var mouseX = Math.round(event.clientX - rect.left);
  var mouseY = Math.round(event.clientY - rect.top);

  // Calculate the map coordinates
  var mapX = Math.floor(mouseX / TILE_SIZE);
  var mapY = Math.floor(mouseY / TILE_SIZE);

  // Write the map coordinates to the DOM element
  document.getElementById('coordinates').innerText = 'Map grid: x ' + mapX + ', y ' + mapY;

  // Write the canvas coordinates to the DOM element
  document.getElementById('canvasCoordinates').innerText = 'Canvas: x ' + mouseX + ', y ' + mouseY;
});