/**
 * Runtime Entity
 * @param graphics GameLib.D3.Graphics
 * @param apiEntity GameLib.D3.API.Entity
 * @constructor
 */
GameLib.Entity = function (
    graphics,
    apiEntity
) {

    this.graphics = graphics;
    this.graphics.isNotThreeThrow();

    GameLib.API.Entity.call(
        this,
        apiEntity.id,
        apiEntity.name,
        apiEntity.components
    );

    this.components = this.components.map(

        function (apiComponent) {

            if (apiComponent instanceof GameLib.D3.API.PathFollowing) {
                return new GameLib.D3.PathFollowing(this.graphics, apiComponent);
            }

            if (apiComponent instanceof GameLib.D3.API.Renderer) {
                return new GameLib.D3.Renderer(this.graphics, apiComponent);
            }

            if (apiComponent instanceof GameLib.D3.API.LookAt) {
                return new GameLib.D3.LookAt(this.graphics, apiComponent);
            }

            if (apiComponent instanceof GameLib.D3.API.Follow) {
                return new GameLib.D3.Follow(this.graphics, apiComponent);
            }

            if (apiComponent instanceof GameLib.D3.API.Input.Drive) {
                return new GameLib.D3.Input.Drive(this.graphics, apiComponent);
            }

            if (apiComponent instanceof GameLib.D3.API.Spline) {
                return new GameLib.D3.Spline(this.graphics, apiComponent);
            }

            return apiComponent;

        }.bind(this)
    );

    this.instance = this.createInstance();
};

GameLib.Entity.prototype = Object.create(GameLib.API.Entity.prototype);
GameLib.Entity.prototype.constructor = GameLib.Entity;

/**
 * Creates an entity instance
 */
GameLib.Entity.prototype.createInstance = function() {
    /**
     * FUCK ecsjs and tiny-ecs - no client-side support and shitty code (only takes constructors as args)
     */
    return null;
};

/**
 * Adds a component to this entity through the instance (should notify the entity manager instance)
 * @param component
 */
GameLib.Entity.prototype.addComponent = function(component) {
    this.components.push(component);
    component.parentEntity = this;
};

/**
 *
 * @param component
 */
GameLib.Entity.prototype.removeComponent = function(component) {

    component.parentEntity = null;

    var index = this.components.indexOf(component);

    if (index == -1) {
        console.log('failed to remove component : ', component);
        return false;
    }

    this.components.splice(index, 1);
    return true;
};

/**
 * Updates an entity instance
 */
GameLib.Entity.prototype.updateInstance = function() {
    this.instance = this.createInstance(true);
};

/**
 * Converts a GameLib.Entity to GameLib.API.Entity
 * @returns {GameLib.API.Entity}
 */
GameLib.Entity.prototype.toApiEntity = function() {

    var apiComponents = this.components.map(
        function(component) {
            return component.toApiComponent();
        }
    );

    return new GameLib.API.Entity(
        this.id,
        this.name,
        apiComponents
    );

};

/**
 *
 * @param graphics GameLib.D3.Graphics
 * @param objectEntity Object
 * @constructor
 */
GameLib.Entity.FromObjectEntity = function(graphics, objectEntity) {

    var apiEntity = GameLib.API.Entity.FromObjectEntity(objectEntity);

    return new GameLib.Entity(
        graphics,
        apiEntity
    );
};