package com.dtb.portal.util;

import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

@Slf4j
public class WxPhoneNumberUtils {

    /**
     * 获取微信手机号和openId
     */
    public static JSONObject getPhoneNumberAndOpenId(String appId, String appSecret, String phoneCode, String loginCode) {
        try {
            // 1. 通过登录code获取session_key和openid
            String url = String.format(
                "https://api.weixin.qq.com/sns/jscode2session?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code",
                appId, appSecret, loginCode);
            
            JSONObject sessionResult = httpGet(url);
            String sessionKey = sessionResult.getString("session_key");
            String openId = sessionResult.getString("openid");
            String unionId = sessionResult.getString("unionid");
            
            if (StringUtils.isBlank(sessionKey)) {
                throw new RuntimeException("获取session_key失败");
            }
            
            // 2. 通过手机号code获取手机号
            url = "https://api.weixin.qq.com/wxa/business/getuserphonenumber";
            String accessToken = getAccessToken(appId, appSecret);
            url = url + "?access_token=" + accessToken;
            
            // 构建请求体
            JSONObject requestBody = new JSONObject();
            requestBody.put("code", phoneCode);
            
            // 发送POST请求
            JSONObject phoneResult = httpPost(url, requestBody);
            log.info("获取手机号结果: {}", phoneResult);
            
            if (phoneResult.getInteger("errcode") != 0) {
                throw new RuntimeException("获取手机号失败: " + phoneResult.getString("errmsg"));
            }
            
            String phoneNumber = phoneResult.getJSONObject("phone_info").getString("phoneNumber");
            
            // 3. 返回结果
            JSONObject result = new JSONObject();
            result.put("phoneNumber", phoneNumber);
            result.put("openId", openId);
            result.put("unionId", unionId);
            return result;
            
        } catch (Exception e) {
            log.error("获取微信手机号失败", e);
            throw new RuntimeException("获取微信手机号失败: " + e.getMessage());
        }
    }
    
    /**
     * 获取APP微信登录的openId
     */
    public static JSONObject getOpenIdByCode(String appId, String appSecret, String code) {
        try {
            // 通过code获取access_token和openid
            String url = String.format(
                "https://api.weixin.qq.com/sns/oauth2/access_token?appid=%s&secret=%s&code=%s&grant_type=authorization_code",
                appId, appSecret, code);
            
            log.info("请求微信OAuth2接口URL: {}", url);
            JSONObject result = httpGet(url);
            log.info("微信OAuth2接口返回: {}", result);
            
            // 如果返回错误，尝试使用替代接口
            if (result.containsKey("errcode") && result.getIntValue("errcode") != 0) {
                // 尝试使用替代接口
                url = String.format(
                    "https://api.weixin.qq.com/sns/jscode2session?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code",
                    appId, appSecret, code);
                    
                log.info("尝试替代接口URL: {}", url);
                result = httpGet(url);
                log.info("替代接口返回: {}", result);
            }
            
            // 检查错误码
            if (result.containsKey("errcode") && result.getIntValue("errcode") != 0) {
                throw new RuntimeException("微信接口返回错误: " + result.getString("errmsg"));
            }
            
            String accessToken = result.getString("access_token");
            String openId = result.getString("openid");
            String unionId = result.getString("unionid");
            
            if (StringUtils.isBlank(openId)) {
                throw new RuntimeException("获取openid失败，微信接口返回: " + result.toJSONString());
            }
            
            // 返回结果
            JSONObject response = new JSONObject();
            response.put("openid", openId);
            response.put("unionid", unionId);
            response.put("access_token", accessToken);
            return response;
            
        } catch (Exception e) {
            log.error("获取APP微信openId失败", e);
            throw new RuntimeException("获取APP微信openId失败: " + e.getMessage());
        }
    }
    
    /**
     * 获取access_token
     */
    private static String getAccessToken(String appId, String appSecret) {
        String url = String.format(
            "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s",
            appId, appSecret);
            
        JSONObject result = httpGet(url);
        return result.getString("access_token");
    }
    
    /**
     * 发送GET请求
     */
    public static JSONObject httpGet(String url) {
        try {
            CloseableHttpClient client = HttpClients.createDefault();
            HttpGet httpGet = new HttpGet(url);
            CloseableHttpResponse response = client.execute(httpGet);
            HttpEntity entity = response.getEntity();
            String result = EntityUtils.toString(entity);
            JSONObject jsonResult = JSONObject.parseObject(result);
            log.debug("HTTP GET Response: {}", jsonResult);
            return jsonResult;
        } catch (Exception e) {
            log.error("HTTP GET请求失败: {}", e.getMessage());
            throw new RuntimeException("HTTP请求失败: " + e.getMessage());
        }
    }
    
    private static JSONObject httpPost(String url, JSONObject body) {
        try {
            CloseableHttpClient client = HttpClients.createDefault();
            HttpPost httpPost = new HttpPost(url);
            
            // 设置请求头
            httpPost.setHeader("Content-Type", "application/json");
            
            // 设置请求体
            StringEntity entity = new StringEntity(body.toString(), "UTF-8");
            httpPost.setEntity(entity);
            
            // 发送请求
            CloseableHttpResponse response = client.execute(httpPost);
            HttpEntity responseEntity = response.getEntity();
            String result = EntityUtils.toString(responseEntity);
            
            JSONObject jsonResult = JSONObject.parseObject(result);
            log.debug("HTTP POST Response: {}", jsonResult);
            return jsonResult;
        } catch (Exception e) {
            log.error("HTTP POST请求失败: {}", e.getMessage());
            throw new RuntimeException("HTTP请求失败: " + e.getMessage());
        }
    }
    
    /**
     * 调试微信code
     */
    public static JSONObject debugCode(String appId, String appSecret, String code) {
        JSONObject debug = new JSONObject();
        try {
            // 获取session_key和openid
            String url = String.format(
                "https://api.weixin.qq.com/sns/jscode2session?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code",
                appId, appSecret, code);
            
            JSONObject sessionResult = httpGet(url);
            debug.put("jscode2session", sessionResult);
            
            // 获取access_token
            String accessToken = getAccessToken(appId, appSecret);
            debug.put("access_token", accessToken);
            
            // 获取手机号
            url = String.format(
                "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=%s",
                accessToken);
                
            JSONObject phoneResult = httpGet(url);
            debug.put("phone_result", phoneResult);
            
            return debug;
        } catch (Exception e) {
            debug.put("error", e.getMessage());
            return debug;
        }
    }
}