import { resolveLoginPlatform } from '@/api/auth';

export interface WxPayParams {
	timeStamp: string;
	nonceStr: string;
	package: string;
	signType: string;
	paySign: string;
}

export const extractWxPayParams = (data: Record<string, any> = {}): WxPayParams => ({
	timeStamp: String(data.timeStamp || data.time_stamp || data.timestamp || ''),
	nonceStr: data.nonceStr || data.nonce_str || '',
	package: data.package || data.pack || '',
	signType: data.signType || data.sign_type || 'RSA',
	paySign: data.paySign || data.pay_sign || ''
});

/** 支付宝小程序 tradeNO，后端 jspay 通常放在 prepay_id 字段 */
export const extractAlipayTradeNo = (data: Record<string, any> = {}) =>
	String(data.prepay_id || data.tradeNO || '');

const ALIPAY_RESULT_MESSAGES: Record<string, string> = {
	'4000': '订单处理失败，请确认 tradeNO 与 buyer_id 是否正确',
	'6001': '已取消支付',
	'6002': '网络连接出错，请稍后重试',
	'6004': '支付结果未知，请在订单页查询',
	'8000': '支付处理中，请在订单页查询'
};

export const formatPaymentError = (error: unknown) => {
	const err = error as any;
	if (err?.message && !/^支付失败$/.test(String(err.message))) {
		return String(err.message);
	}

	const memo = err?.memo || err?.errMsg || err?.errorMessage || '';
	if (memo && !/^requestPayment:fail/.test(String(memo))) {
		return String(memo);
	}

	const resultCode = String(err?.resultCode || '');
	if (resultCode && ALIPAY_RESULT_MESSAGES[resultCode]) {
		return ALIPAY_RESULT_MESSAGES[resultCode];
	}

	if (memo) return String(memo);

	return '支付失败';
};

export const requestWxPayment = (params: WxPayParams) => {
	return new Promise<void>((resolve, reject) => {
		uni.requestPayment({
			provider: 'wxpay',
			timeStamp: params.timeStamp,
			nonceStr: params.nonceStr,
			package: params.package,
			signType: params.signType,
			paySign: params.paySign,
			success: () => resolve(),
			fail: (error) => reject(error)
		});
	});
};

export const requestAlipayPayment = (tradeNO: string) => {
	console.log('[收银台][支付宝支付] 调起 tradeNO', tradeNO);

	return new Promise<void>((resolve, reject) => {
		// #ifdef MP-ALIPAY
		if (typeof my !== 'undefined' && typeof my.tradePay === 'function') {
			my.tradePay({
				tradeNO,
				success: (res: any) => {
					console.log('[收银台][支付宝支付] success', res);
					const resultCode = String(res?.resultCode || '');
					if (resultCode === '9000' || resultCode === '8000' || resultCode === '6004') {
						resolve();
						return;
					}
					if (resultCode === '6001') {
						reject({ resultCode, errMsg: 'requestPayment:cancel', memo: '用户取消支付' });
						return;
					}
					reject({
						resultCode,
						memo: res?.memo || ALIPAY_RESULT_MESSAGES[resultCode] || '支付失败'
					});
				},
				fail: (error: any) => {
					console.log('[收银台][支付宝支付] fail', error);
					reject(error);
				}
			});
			return;
		}
		// #endif

		uni.requestPayment({
			provider: 'alipay',
			orderInfo: tradeNO,
			success: (res) => {
				console.log('[收银台][支付宝支付] uni.requestPayment success', res);
				resolve();
			},
			fail: (error) => {
				console.log('[收银台][支付宝支付] uni.requestPayment fail', error);
				reject(error);
			}
		});
	});
};

/** 按当前端解析 jspay / cash.trade 返回并调起支付 */
export const requestPlatformPayment = async (data: Record<string, any> = {}) => {
	if (resolveLoginPlatform() === 'mp-alipay') {
		const tradeNO = extractAlipayTradeNo(data);
		if (!tradeNO) {
			throw new Error('支付参数不完整');
		}
		await requestAlipayPayment(tradeNO);
		return;
	}

	const params = extractWxPayParams(data);
	if (!params.paySign) {
		throw new Error('支付参数不完整');
	}
	await requestWxPayment(params);
};

export const isPaymentCancelled = (error: unknown) => {
	const message = String((error as any)?.errMsg || '');
	const resultCode = String((error as any)?.resultCode || '');
	return message.includes('cancel') || resultCode === '6001';
};