import { Engine, engine } from '../../engine';
import { EntityBackdrop } from '../entity/entityBackdrop';
import { Stage } from '../stage';
import { StageBackdrop } from '../stage/stageBackdrop';
import type { IImage } from '../../../type/image';
import type { ISpriteLooksBackdrop } from '../../../type/entity/sprite/ISpriteLooksBackdrop';
import type { ISprite } from '../../../type/entity/sprite';
import { StageLooksBackdrop } from '../stage/stageLooksBackdrop';

/** 
 * 背景 
 **/
export class SpriteLooksBackdrop extends EntityBackdrop implements ISpriteLooksBackdrop {

    /**
     * @internal
     * @param entity {ISprite}
     */
    constructor(entity:ISprite){
        super(entity);
    }
    /**
     * 背景名の配列
     */
    get names() : string[] {
        const _entity = (engine as Engine).getStage() as Stage
        if( _entity ) {
            return _entity.Backdrop.names;
        }
        return [];
    }
    /**
     * 背景番号
     * ```ts
     *  // 背景番号
     *  const no = this.Looks.Backdrop.no;
     * ```
     */
    get no(): number {
        const _entity = (engine as Engine).getStage() as Stage
        if(_entity) {
            return (_entity.Backdrop as StageBackdrop).no;    
        }
        return -1;
    }
    /**
     * 背景番号
     * ```ts
     *  // 背景番号
     *  this.Looks.Backdrop.no = 1;
     * ```
     */
    set no(no:number) {
        const _entity = (engine as Engine).getStage() as Stage
        if( _entity ) {
            (_entity.Backdrop as StageBackdrop).no = no;
        }
    }
    /**
     * 背景名
     * ```ts
     *  // 背景名
     *  const name = this.Looks.Backdrop.name;
     * ```
     */
    get name(): string {
        const _entity = (engine as Engine).getStage() as Stage;
        if(_entity){
            return (_entity.Backdrop as StageBackdrop).name;
        }
        return '';
    }
    /**
     * 背景名
     * ```ts
     *  // 背景名
     *  this.Looks.Backdrop.name = "backdrop";
     * ```
     */
    set name(name:string) {
        const _entity = (engine as Engine).getStage() as Stage;
        if(_entity){
            (_entity.Backdrop as StageBackdrop).name = name;
        }
    }
    /**
     * 次の背景にする
     * ```ts
     *  this.Looks.Backdrop.nextBackdrop();
     * ```
     */
    next() : void {
        const _entity = (engine as Engine).getStage() as Stage;
        if(_entity){
            (_entity.Backdrop as StageBackdrop).next();
        }
    }

    switch( backdrop: IImage): void {
        const _entity = (engine as Engine).getStage() as Stage;
        if(_entity){
            (_entity.Backdrop as StageLooksBackdrop).switch( backdrop );
        }
    }
    /**
     * 前の背景にする
     */
    previous() : void {
        const _entity = (engine as Engine).getStage() as Stage;
        if(_entity) {
            (_entity.Backdrop as StageBackdrop).previous();
        }
    }

    /**
     * どれかの背景にする
     */
    switchRandom(): void {
        const _entity = (engine as Engine).getStage() as Stage;
        if(_entity) {
            (_entity.Backdrop as StageBackdrop).switchRandom();
        }
        
    }

}