const { ccclass, property, requireComponent } = cc._decorator;

/** 挂到带 Sprite 的节点上，并在 Inspector 中指定 jungle_shine.effect。 */
@ccclass
@requireComponent(cc.Sprite)
export default class JungleShine extends cc.Component {
    @property(cc.EffectAsset)
    effectAsset: cc.EffectAsset = null;

    private material: cc.Material = null;
    private delayRemaining: number = 0.15;
    private elapsed: number = 0;

    protected onLoad(): void {
        let sprite = this.getComponent(cc.Sprite);
        if (!sprite || !this.effectAsset) {
            cc.warn("[JungleShine] 请在 Inspector 中绑定 jungle_shine.effect");
            return;
        }

        let material = new cc.Material();
        // @ts-ignore Cocos Creator 2.4 通过 effectAsset 创建运行时材质。
        material.effectAsset = this.effectAsset;
        material.setProperty("shinePosition", -0.35);
        material.setProperty("shineWidth", 0.075);
        material.setProperty("shineStrength", 1.8);
        material.setProperty("shineAngle", 0.2);
        material.setProperty("shineColor", [1.0, 0.95, 0.68, 1.0]);
        this.material = material;
        sprite.setMaterial(0, material);
    }

    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 / 0.72);
        this.material.setProperty("shinePosition", -0.35 + 1.7 * progress);
        if (progress >= 1) {
            this.elapsed = 0;
            this.delayRemaining = 1.25;
            this.material.setProperty("shinePosition", -0.35);
        }
    }

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