import { IOS } from "cc/env";
import { native } from 'cc';

export interface IOSAuthResult {
    status: 'connected' | 'cancelled' | 'error';
    isCancel: boolean;
    identityToken?: string;
    authorizationCode?: string;
    userId?: string;
    name?: string;
    email?: string;
    nonce?: string;
    reason?: string;
}

class IOSAuth {
    private listening = false;
    private seed = 0;
    private pending: { id: string; resolve: (result: IOSAuthResult) => void; timer: ReturnType<typeof setTimeout> } | null = null;

    init(): void {
        if (this.listening) return;
        native.jsbBridgeWrapper.addNativeEventListener('appleauth.response', payload => {
            let response: { requestId: string; data: IOSAuthResult };
            try { response = JSON.parse(payload); } catch { return; }
            const pending = this.pending;
            if (!pending || response.requestId !== pending.id) return;
            clearTimeout(pending.timer);
            this.pending = null;
            pending.resolve(response.data);
        });
        this.listening = true;
    }

    /** nonce 原样传给 Apple；生产环境建议使用后端预先生成并绑定本次登录的随机挑战。 */
    async login(nonce?: string): Promise<IOSAuthResult> {
        const failure = (reason: string): IOSAuthResult => ({ status: 'error', isCancel: false, reason });
        if (this.pending) return failure('Apple 登录正在进行中。');
        if (nonce !== undefined && (!nonce.trim() || nonce.length > 512)) return failure('nonce 无效。');
        try { this.init(); } catch (error) { return failure(String(error)); }
        const id = `${Date.now()}-${++this.seed}`;
        return new Promise(resolve => {
            const timer = setTimeout(() => {
                this.pending = null;
                resolve(failure('Apple 授权等待超时，请关闭系统授权窗口后重试。'));
            }, 180000);
            this.pending = { id, resolve, timer };
            try {
                native.jsbBridgeWrapper.dispatchEventToNative('appleauth.request', JSON.stringify({ requestId: id, nonce }));
            } catch (error) {
                clearTimeout(timer); this.pending = null; resolve(failure(String(error)));
            }
        });
    }
}


const iosAuth = IOS ? new IOSAuth : null;
export default iosAuth;