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 retainedEffect: cc.EffectAsset = null;
    private delayRemaining: number = 0.15;
    private elapsed: number = 0;

    protected onLoad(): void {
        let sprite = this.getComponent(cc.Sprite);
        if (!sprite) return;
        if (this.isEffectReady(this.effectAsset)) {
            this.createMaterial(sprite, this.effectAsset);
        } else {
            // 旧预制体可能仍持有已释放的 EffectAsset，非空不代表可用。
            cc.assetManager.loadBundle("publicUI", (error, bundle) => {
                if (!cc.isValid(this, true)) return;
                if (error) {
                    cc.error("[JungleShine] 加载 publicUI 失败", error);
                    return;
                }
                bundle.load("jungle_shine", cc.EffectAsset, (error, effect: cc.EffectAsset) => {
                    if (!cc.isValid(this, true)) return;
                    if (error || !this.isEffectReady(effect)) {
                        cc.error("[JungleShine] 加载扫光特效失败", error || "EffectAsset 数据无效");
                        return;
                    }
                    this.effectAsset = effect;
                    this.createMaterial(sprite, effect);
                });
            });
        }
    }

    private isEffectReady(effect: cc.EffectAsset): boolean {
        if (!cc.isValid(effect, true)) return false;
        // Creator 2.4 的类型声明未包含 techniques。
        const techniques = (effect as any).techniques;
        return Array.isArray(techniques) && techniques.length > 0
            && techniques.every(technique => technique && Array.isArray(technique.passes) && technique.passes.length > 0);
    }

    private createMaterial(sprite: cc.Sprite, effect: cc.EffectAsset): void {
        // 运行时创建的材质由本组件持有，同时保留其特效资源。
        this.retainedEffect = effect.addRef();
        let material = new cc.Material();
        // @ts-ignore Cocos Creator 2.4 通过 effectAsset 创建运行时材质。
        material.effectAsset = effect;
        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;
        if (cc.isValid(this.retainedEffect, true)) {
            this.retainedEffect.decRef();
        }
        this.retainedEffect = null;
    }
}