(function() {
"use strict";

var CollisionSystem = function() {
    this.initialize();
}
var p = CollisionSystem.prototype = new creatine.System();

    p.initialize = function() {

    }

    p.process = function(boids, fdelta) {
        for (var i=0; i<boids.length; i++) {
            this._boidsAgainstMap(boids[i], fdelta);
        }
    }

    p._boidsAgainstMap = function(b, fdelta) {
        var vx = 0;
        var vy = 0;
        var flock = b.getComponent('Flock');

        var px = b.display.x;
        var py = b.display.y;
        var px2 = b.display.x+flock.velocityX*fdelta;
        var py2 = b.display.y+flock.velocityY*fdelta;

        var tx = toCoordX(px);
        var ty = toCoordY(py);
        var tx2 = toCoordX(px2);
        var ty2 = toCoordY(py2);

        var hardBlocks = registry.map.getLayerByName('area_hardblock');

        if (getTile(hardBlocks, tx, ty)) {
            var cx = tx*registry.map.tileWidth+registry.map.tileWidth/2;
            var cy = ty*registry.map.tileHeight+registry.map.tileHeight/2;
            
            if (dist(px2, py2, cx, cy) > dist(px, py, cx, cy)) {
                return;
            }
        }

        if (getTile(hardBlocks, tx, ty2)) {
            flock.velocityY = 0;
        }
        if (getTile(hardBlocks, tx2, ty)) {
            flock.velocityX = 0;
        }
    }
    

window.CollisionSystem = CollisionSystem;

})();