console.log("loading collision system");

const collisionShape = {
    CIRCLE: {},
    CAPSULE: {},
    RECTANGLE: {}
};

const collision = (engine) => (
    entity,
    collisionData = {
        layers: new Set(),
        mask: new Set(),
        shape: collisionShape.RECTANGLE
    }) => {
        const {layers, mask, shape} = collisionData;
        // masking
        return (message, ...messageArgs) => {
            switch (message) {
            case "checkCollision": {
                console.log("checkingCollision");
                Object.values(engine("components")
                              .collision
                              .instances)
                    .filter(collider => collider("mask", layers))
                    .forEach(toCheck => console.log(toCheck));

                break;
            }
            case "mask": {
                let [layersToCheck] = messageArgs;
                let masking = false;
                // console.log(entity);
                // console.log("mask: ", mask);
                // console.log("layersToCheck: ",layersToCheck);
                for (layer in layersToCheck.values()) {
                    if (mask.has(layer)) {
                        masking = true;
                        break;
                    }
                }
                return masking;
            }

            };
        };

    };

const initCollisionSystem = (engine) => {
    engine("registerComponentType", "collision", collision);
    //
};