const { ccclass, requireComponent } = cc._decorator;

/** Jungle title 专用的左至右高亮扫光。 */
@ccclass
@requireComponent(cc.Sprite)
export default class JungleTitleShine extends cc.Component {
    private sprite: cc.Sprite = null;
    private material: cc.Material = null;
    private moveDuration: number = 0.85;
    private repeatDelay: number = 1.5;
    private startDelay: number = 0.25;
    private elapsed: number = 0;
    private delayRemaining: number = 0;
    private startPosition: number = -0.35;
    private endPosition: number = 1.35;

    protected onLoad(): void {
        this.sprite = this.getComponent(cc.Sprite);
        this.delayRemaining = this.startDelay;
        this.loadMaterial();
    }

    protected update(dt: number): void {
        if (!this.material) {
            return;
        }
        if (this.delayRemaining > 0) {
            this.delayRemaining = Math.max(0, this.delayRemaining - dt);
            return;
        }

        this.elapsed += dt;
        let progress = Math.min(1, this.elapsed / this.moveDuration);
        let position = this.startPosition
            + (this.endPosition - this.startPosition) * progress;
        this.material.setProperty("shinePosition", position);
        if (progress >= 1) {
            this.elapsed = 0;
            this.delayRemaining = this.repeatDelay;
            this.material.setProperty("shinePosition", this.startPosition);
        }
    }

    protected onDestroy(): void {
        if (this.material && cc.isValid(this.material)) {
            this.material.destroy();
        }
        this.material = null;
        this.sprite = null;
    }

    private loadMaterial(): void {
        let bundle = cc.assetManager.getBundle("jungle_treasure");
        if (!bundle || !this.sprite) {
            cc.warn("[JungleTreasure] title 扫光材质所在分包未加载");
            return;
        }

        bundle.load("effect/title_shine", cc.EffectAsset, (error: Error, effect: cc.EffectAsset) => {
            if (error || !effect || !cc.isValid(this.node) || !this.sprite) {
                if (error) {
                    cc.warn("[JungleTreasure] title 扫光 Shader 加载失败", error);
                }
                return;
            }

            let material = new cc.Material();
            // Cocos Creator 2.4 使用 effectAsset 为运行时材质指定 Shader。
            // @ts-ignore
            material.effectAsset = effect;
            material.setProperty("shinePosition", this.startPosition);
            material.setProperty("shineWidth", 0.13);
            material.setProperty("shineStrength", 1.8);
            material.setProperty("shineAngle", 0.2);
            material.setProperty("shineColor", [1.0, 0.95, 0.68, 1.0]);
            this.material = material;
            this.sprite.setMaterial(0, material);
        });
    }
}