package cc.mrbird.febs.pay.util;

import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.security.MessageDigest;
import java.util.LinkedHashMap;
import java.util.Map;

@Slf4j
@Service(value="FiuuUtil")
public class FiuuUtil {

	private static final String API_URL = "https://api.fiuu.com/RMS/API/refundAPI/index.php";
	private static final String MERCHANT_ID = "e2umart01";
	private static final String SECRET_KEY = "59c709fc18978a6a83b87f05d37cecbf";

	@Transactional
	public void comRefund(String outTradeNo, String outRefundNo,String amount){
			// 退款请求参数
			Map<String, String> params = new LinkedHashMap<>();
			params.put("RefundType", "P"); // P: Partial Refund, F: Full Refund
			params.put("MerchantID", MERCHANT_ID);
			params.put("RefID", outRefundNo); // 商户唯一退款ID
			params.put("TxnID", outTradeNo); // Fiuu原始交易ID
			params.put("Amount", amount); // 退款金额

			// 生成签名
		String signature = null;
		try {
			signature = generateSignature(params);
		} catch (Exception e) {
			e.printStackTrace();
		}
		params.put("Signature", signature);

			// 发送GET请求
		String response = null;
		try {
			response = sendRefundRequest(params);
		} catch (Exception e) {
			e.printStackTrace();
		}
		System.out.println("退款响应: " + response);

//		JSONObject jsonObject = JSONUtil.parseObj(response);
//
//		String status = jsonObject.getStr("status");
//		if ("00".equals(status)) {
//			return true;
//		}else{
//			return false;
//		}

	}
	public static void main(String[] args) {
		try {
			// 退款请求参数
			Map<String, String> params = new LinkedHashMap<>();
			params.put("RefundType", "P"); // P: Partial Refund, F: Full Refund
			params.put("MerchantID", MERCHANT_ID);
			params.put("RefID", "2025020611124868512_RITEM42432121"); // 商户唯一退款ID
			params.put("TxnID", "2685352601"); // Fiuu原始交易ID
			params.put("Amount", "1.00"); // 退款金额

			// 生成签名
			String signature = generateSignature(params);
			params.put("Signature", signature);

			// 发送GET请求
			String response = sendRefundRequest(params);
			System.out.println("退款响应: " + response);

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 生成MD5签名
	 */
	private static String generateSignature(Map<String, String> params) throws Exception {
		// 按顺序拼接参数：RefundType + MerchantID + RefID + TxnID + Amount + SecretKey
		String rawData = params.get("RefundType") +
				params.get("MerchantID") +
				params.get("RefID") +
				params.get("TxnID") +
				params.get("Amount") +
				SECRET_KEY;

		MessageDigest md = MessageDigest.getInstance("MD5");
		byte[] hashBytes = md.digest(rawData.getBytes("UTF-8"));

		// 转换为十六进制字符串
		StringBuilder hexString = new StringBuilder();
		for (byte b : hashBytes) {
			String hex = Integer.toHexString(0xff & b);
			if (hex.length() == 1) hexString.append('0');
			hexString.append(hex);
		}

		return hexString.toString();
	}

	/**
	 * 发送退款请求（GET方式）
	 */
	private static String sendRefundRequest(Map<String, String> params) throws Exception {
		StringBuilder urlBuilder = new StringBuilder(API_URL);
		urlBuilder.append("?");

		// 拼接查询参数
		for (Map.Entry<String, String> entry : params.entrySet()) {
			urlBuilder.append(entry.getKey())
					.append("=")
					.append(entry.getValue())
					.append("&");
		}
		String url = urlBuilder.toString().replaceAll("&$", ""); // 去除末尾的&

		// 使用HttpClient发送请求
		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
			HttpGet httpGet = new HttpGet(url);
			try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
				HttpEntity entity = response.getEntity();
				return EntityUtils.toString(entity);
			}
		}
	}
	
	
}