/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2018 Photon Storm Ltd.
 * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
 */

var TileToWorldX = require('./TileToWorldX');
var TileToWorldY = require('./TileToWorldY');
var GetTilesWithin = require('./GetTilesWithin');
var ReplaceByIndex = require('./ReplaceByIndex');

/**
 * Creates a Sprite for every object matching the given tile indexes in the layer. You can
 * optionally specify if each tile will be replaced with a new tile after the Sprite has been
 * created. This is useful if you want to lay down special tiles in a level that are converted to
 * Sprites, but want to replace the tile itself with a floor tile or similar once converted.
 *
 * @function Phaser.Tilemaps.Components.CreateFromTiles
 * @since 3.0.0
 *
 * @param {integer|array} indexes - The tile index, or array of indexes, to create Sprites from.
 * @param {integer|array} replacements - The tile index, or array of indexes, to change a converted
 * tile to. Set to `null` to leave the tiles unchanged. If an array is given, it is assumed to be a
 * one-to-one mapping with the indexes array.
 * @param {object} spriteConfig - The config object to pass into the Sprite creator (i.e.
 * scene.make.sprite).
 * @param {Phaser.Scene} [scene=scene the map is within] - The Scene to create the Sprites within.
 * @param {Phaser.Cameras.Scene2D.Camera} [camera=main camera] - The Camera to use when determining the world XY
 * @param {Phaser.Tilemaps.LayerData} layer - The Tilemap Layer to act upon.
 * 
 * @return {Phaser.GameObjects.Sprite[]} An array of the Sprites that were created.
 */
var CreateFromTiles = function (indexes, replacements, spriteConfig, scene, camera, layer)
{
    if (spriteConfig === undefined) { spriteConfig = {}; }

    if (!Array.isArray(indexes)) { indexes = [ indexes ]; }

    var tilemapLayer = layer.tilemapLayer;
    if (scene === undefined) { scene = tilemapLayer.scene; }
    if (camera === undefined) { camera = scene.cameras.main; }

    var tiles = GetTilesWithin(0, 0, layer.width, layer.height, null, layer);
    var sprites = [];
    var i;

    for (i = 0; i < tiles.length; i++)
    {
        var tile = tiles[i];

        if (indexes.indexOf(tile.index) !== -1)
        {
            spriteConfig.x = TileToWorldX(tile.x, camera, layer);
            spriteConfig.y = TileToWorldY(tile.y, camera, layer);

            var sprite = scene.make.sprite(spriteConfig);
            sprites.push(sprite);
        }
    }

    if (typeof replacements === 'number')
    {
        //  Assume 1 replacement for all types of tile given
        for (i = 0; i < indexes.length; i++)
        {
            ReplaceByIndex(indexes[i], replacements, 0, 0, layer.width, layer.height, layer);
        }
    }
    else if (Array.isArray(replacements))
    {
        //  Assume 1 to 1 mapping with indexes array
        for (i = 0; i < indexes.length; i++)
        {
            ReplaceByIndex(indexes[i], replacements[i], 0, 0, layer.width, layer.height, layer);
        }
    }

    return sprites;
};

module.exports = CreateFromTiles;