var SetTileCollision = require('./SetTileCollision');
var CalculateFacesWithin = require('./CalculateFacesWithin');
var SetLayerCollisionIndex = require('./SetLayerCollisionIndex');

/**
 * Sets collision on a range of tiles in a layer whose index is between the specified `start` and
 * `stop` (inclusive). Calling this with a start value of 10 and a stop value of 14 would set
 * collision for tiles 10, 11, 12, 13 and 14. The `collides` parameter controls if collision will be
 * enabled (true) or disabled (false).
 *
 * @param {integer} start - The first index of the tile to be set for collision.
 * @param {integer} stop - The last index of the tile to be set for collision.
 * @param {boolean} [collides=true] - If true it will enable collision. If false it will clear
 * collision.
 * @param {boolean} [recalculateFaces=true] - Whether or not to recalculate the tile faces after the
 * update.
 * @param {LayerData} layer - [description]
 */
var SetCollisionBetween = function (start, stop, collides, recalculateFaces, layer)
{
    if (collides === undefined) { collides = true; }
    if (recalculateFaces === undefined) { recalculateFaces = true; }

    if (start > stop) { return; }

    // Update the array of colliding indexes
    for (var index = start; index <= stop; index++)
    {
        SetLayerCollisionIndex(index, collides, layer);
    }

    // Update the tiles
    for (var ty = 0; ty < layer.height; ty++)
    {
        for (var tx = 0; tx < layer.width; tx++)
        {
            var tile = layer.data[ty][tx];
            if (tile)
            {
                if (tile.index >= start && tile.index <= stop)
                {
                    SetTileCollision(tile, collides);
                }
            }
        }
    }

    if (recalculateFaces) { CalculateFacesWithin(0, 0, layer.width, layer.height, layer); }
};

module.exports = SetCollisionBetween;