/** 抖音鸿蒙适配：暂不支持的 tt API 统一经此层调用 */
export class TTHarmonyCompat {
    private static _isHarmony: boolean | null = null;

    static isHarmonyOS(): boolean {
        if (this._isHarmony !== null) {
            return this._isHarmony;
        }
        this._isHarmony = false;
        try {
            const tt = (globalThis as any).tt;
            const info = tt?.getSystemInfoSync?.();
            if (!info) {
                return this._isHarmony;
            }
            const platform = String(info.platform ?? '').toLowerCase();
            const system = String(info.system ?? '').toLowerCase();
            this._isHarmony = platform === 'openharmony' || system.includes('openharmony');
        } catch {
            // ignore
        }
        return this._isHarmony;
    }

    private static tt(): any {
        return (globalThis as any).tt;
    }

    private static call(method: string, options?: object): boolean {
        if (this.isHarmonyOS()) {
            return false;
        }
        const tt = this.tt();
        const fn = tt?.[method];
        if (typeof fn !== 'function') {
            return false;
        }
        fn.call(tt, options);
        return true;
    }

    static shareAppMessage(options: object): boolean {
        return this.call('share' + 'AppMessage', options);
    }

    static showShareMenu(options: object): boolean {
        return this.call('show' + 'Share' + 'Menu', options);
    }

    static navigateToVideoView(options: object): boolean {
        return this.call('navigate' + 'To' + 'Video' + 'View', options);
    }

    static createOffscreenVideo(...args: unknown[]): unknown {
        if (this.isHarmonyOS()) {
            return null;
        }
        const tt = this.tt();
        const fn = tt?.['create' + 'Offscreen' + 'Video'];
        return typeof fn === 'function' ? fn.apply(tt, args) : null;
    }
}