package com.ruoyi.system.service.impl;

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONArray;
import com.alibaba.fastjson2.JSONObject;
import com.ruoyi.system.domain.dto.GeocodeResult;
import com.ruoyi.system.service.IGeocodeService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import java.net.URLEncoder;

/**
 * 地理编码服务实现类
 * 使用腾讯地图WebService API
 */
@Service
public class GeocodeServiceImpl implements IGeocodeService {

    private static final Logger log = LoggerFactory.getLogger(GeocodeServiceImpl.class);

    /**
     * 腾讯地图API密钥，从配置文件读取
     * 需要在application.yml中配置：tencent.map.key
     */
    @Value("${tencent.map.key:}")
    private String tencentMapKey;

    /**
     * 腾讯地图地理编码API地址
     */
    private static final String GEOCODE_API_URL = "https://apis.map.qq.com/ws/geocoder/v1/";

    private final RestTemplate restTemplate = new RestTemplate();

    @Override
    public GeocodeResult getCoordinatesByAddress(String address) {
        return getCoordinatesByAddress(address, null);
    }

    @Override
    public GeocodeResult getCoordinatesByAddress(String address, String city) {
        if (address == null || address.trim().isEmpty()) {
            return new GeocodeResult(false, "地址不能为空");
        }

        // 检查API密钥是否配置
        if (tencentMapKey == null || tencentMapKey.trim().isEmpty()) {
            log.error("腾讯地图API密钥未配置，请在application.yml中配置tencent.map.key");
            return new GeocodeResult(false, "地图API密钥未配置");
        }

        try {
            // 构建请求URL
            StringBuilder urlBuilder = new StringBuilder(GEOCODE_API_URL);
            urlBuilder.append("?address=").append(URLEncoder.encode(address, "UTF-8"));
            urlBuilder.append("&key=").append(tencentMapKey);
            
            // 如果指定了城市，添加region参数提高准确度
            if (city != null && !city.trim().isEmpty()) {
                urlBuilder.append("&region=").append(URLEncoder.encode(city, "UTF-8"));
            }

            String url = urlBuilder.toString();
            log.info("调用腾讯地图地理编码API: {}", url);

            // 发送HTTP GET请求
            String response = restTemplate.getForObject(url, String.class);
            log.info("腾讯地图API响应: {}", response);

            // 解析JSON响应
            JSONObject jsonResponse = JSON.parseObject(response);
            Integer status = jsonResponse.getInteger("status");

            if (status == null || status != 0) {
                String message = jsonResponse.getString("message");
                log.error("地理编码失败: status={}, message={}", status, message);
                return new GeocodeResult(false, "地理编码失败: " + message);
            }

            // 提取坐标信息
            JSONObject result = jsonResponse.getJSONObject("result");
            if (result == null) {
                return new GeocodeResult(false, "未找到地理编码结果");
            }

            JSONObject location = result.getJSONObject("location");
            if (location == null) {
                return new GeocodeResult(false, "未找到坐标信息");
            }

            Double lat = location.getDouble("lat");
            Double lng = location.getDouble("lng");

            if (lat == null || lng == null) {
                return new GeocodeResult(false, "坐标数据格式错误");
            }

            // 获取标准化地址
            String standardAddress = result.getString("address");

            GeocodeResult geocodeResult = new GeocodeResult(lat, lng, standardAddress);
            log.info("地理编码成功: {}", geocodeResult);

            return geocodeResult;

        } catch (Exception e) {
            log.error("地理编码服务异常", e);
            return new GeocodeResult(false, "地理编码服务异常: " + e.getMessage());
        }
    }
}