package com.gs.xiaomi.service;

import cn.hutool.crypto.digest.DigestUtil;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.gs.xiaomi.config.DataAcquisitionConfiguration;
import com.gs.xiaomi.dto.BCS101Request;
import com.gs.xiaomi.dto.X5Header;
import com.gs.xiaomi.dto.X5Request;
import com.gs.xiaomi.dto.X5Response;
import com.gs.xiaomi.util.X5StringUtils;
import okhttp3.*;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.concurrent.TimeUnit;

@Service
public class BCS101ApiService {

    private final OkHttpClient client;
    private final ObjectMapper objectMapper;

    public BCS101ApiService() {
        this.client = new OkHttpClient.Builder()
                .connectTimeout(3000, TimeUnit.SECONDS)
                .readTimeout(90, TimeUnit.SECONDS)
                .build();
        this.objectMapper = new ObjectMapper();
    }

    /**
     * 获取BCS101数据 - 严格按照C# X5协议实现
     * <p>
     * 基于C# Helper102.POSTResponseData方法的Java实现
     * X5协议流程:
     * 1. 序列化Body为JSON字符串
     * 2. MD5签名: MD5(appid+bodyStr+appkey)
     * 3. 构建X5Request {header: {appid, sign}, body: bodyStr}
     * 4. Base64编码整个X5Request
     * 5. URL编码
     * 6. 发送 data=url编码(base64编码)的数据
     *
     * @param request BCS101请求参数
     * @return API响应
     * @throws IOException 网络异常
     */
    public String getBCS101Data(BCS101Request request) throws IOException {
        try {
            System.out.println("=== BCS101 X5协议实现 (基于C#代码) ===");

            // 1. 序列化Body为JSON字符串
            String bodyStr = objectMapper.writeValueAsString(request);
            System.out.println("1. Body JSON: " + bodyStr);

            // 2. MD5签名: sign = MD5(appid + bodyStr + appkey)
            String appId = DataAcquisitionConfiguration.BCS_APP_ID;
            String appKey = DataAcquisitionConfiguration.BCS_APP_Key;
            String signString = appId + bodyStr + appKey;
            String sign = DigestUtil.md5Hex(signString).toUpperCase();
            System.out.println("2. 签名字符串: " + signString);
            System.out.println("3. MD5签名: " + sign);

            // 3. 构建X5Header
            X5Header header = new X5Header(appId, sign);

            // 4. 构建X5Request
            X5Request x5Request = new X5Request(header, bodyStr);
            String x5RequestJson = objectMapper.writeValueAsString(x5Request);
            System.out.println("4. X5Request JSON: " + x5RequestJson);

            // 5. Base64编码整个X5Request
            String base64Data = X5StringUtils.encodeBase64(x5RequestJson);
            System.out.println("5. Base64编码: " + base64Data);

            // 6. URL编码
            String urlEncodedData = URLEncoder.encode(base64Data, "UTF-8");
            System.out.println("6. URL编码: " + urlEncodedData);

            // 7. 构建form表单数据: data=url编码(base64编码)的数据
            String formData = "data=" + urlEncodedData;
            System.out.println("7. Form数据: " + formData);

            // 8. Basic Auth认证
            String credentials = DataAcquisitionConfiguration.BCS_USER_NAME + ":" + DataAcquisitionConfiguration.BCS_PWD;
            String auth = X5StringUtils.encodeBase64(credentials);
            System.out.println("8. Basic Auth: Basic " + auth);

            // 9. 构建HTTP请求 - 严格按照C#代码的请求格式
            RequestBody body = RequestBody.create(formData, MediaType.parse("application/x-www-form-urlencoded"));
            Request httpRequest = new Request.Builder()
                    .url(DataAcquisitionConfiguration.BCS_101_URL)
                    .method("POST", body)
                    .addHeader("Content-Type", "application/x-www-form-urlencoded")
                    .addHeader("Authorization", "Basic " + auth)
                    .addHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8")
                    .addHeader("Cache-Control", "no-cache")
                    .addHeader("Pragma", "no-cache")
                    .build();

            System.out.println("9. 发送X5协议请求到: " + DataAcquisitionConfiguration.BCS_101_URL);

            // 10. 执行请求
            try (Response response = client.newCall(httpRequest).execute()) {
                System.out.println("10. HTTP状态码: " + response.code());
                System.out.println("11. 响应头: " + response.headers());

                if (response.body() != null) {
                    String responseBody = response.body().string();
                    System.out.println("12. 原始响应: " + responseBody);

                    // 11. 尝试解析为X5Response格式
                    try {
                        X5Response x5Response = objectMapper.readValue(responseBody, X5Response.class);
                        System.out.println("13. X5响应解析成功: " + x5Response);

                        // 检查响应状态
                        if (x5Response.getHeader() != null && "200".equals(x5Response.getHeader().getCode())) {
                            System.out.println("14. X5协议调用成功");
                        } else {
                            System.out.println("14. X5协议调用失败: " +
                                    (x5Response.getHeader() != null ? x5Response.getHeader().getDesc() : "未知错误"));
                        }
                    } catch (Exception e) {
                        System.out.println("13. 非X5格式响应，直接返回原始内容");
                    }

                    return responseBody;
                }

                throw new IOException("Empty response body");
            }

        } catch (Exception ex) {
            System.err.println("BCS101 X5协议调用异常: " + ex.getMessage());
            ex.printStackTrace();
            throw new IOException("BCS101 X5协议调用失败", ex);
        }
    }

}