/**
 * Entity API Object (for storing / loading entities to and from API)
 * @param id
 * @param name
 * @param components GameLib.Component[]
 * @param parentEntity GameLib.Entity
 * @param parentEntityManager
 * @constructor
 */
GameLib.API.Entity = function(
    id,
    name,
    components,
    parentEntity,
    parentEntityManager
) {
    if (GameLib.Utils.UndefinedOrNull(parentEntity)) {
        parentEntity = null;
    }
    this.parentEntity = parentEntity;

	if (GameLib.Utils.UndefinedOrNull(parentEntityManager)) {
		parentEntityManager = null;
	}
	this.parentEntityManager = parentEntityManager;

	this.activeComponent = null;

    GameLib.Component.call(
        this,
        GameLib.Component.COMPONENT_ENTITY,
        {
            'components' : [GameLib.Component],
            'activeComponent' : GameLib.Component
        },
        parentEntity
    );

    if (GameLib.Utils.UndefinedOrNull(id)) {
        id = GameLib.Utils.RandomId();
    }
    this.id = id;

    if (GameLib.Utils.UndefinedOrNull(name)) {
        name = 'Entity (' + this.id + ')';
    }
    this.name = name;

    if (GameLib.Utils.UndefinedOrNull(components)) {
        components = [];
    }
    this.components = components;
};

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

/**
 * Returns an API entity from an Object entity
 * @param objectEntity
 * @constructor
 */
GameLib.API.Entity.FromObjectEntity = function(objectEntity) {

    var apiComponents = objectEntity.components.map(
        function (objectComponent) {
            return GameLib.API.Component.FromObjectComponent(objectComponent);
        }
    );

    return new GameLib.API.Entity(
        objectEntity.id,
        objectEntity.name,
        apiComponents,
        objectEntity.parentEntity,
        objectEntity.parentEntityManager
    )
};