/*
 *      Copyright (c) 2018-2028, Chill Zhuang All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  Redistributions of source code must retain the above copyright notice,
 *  this list of conditions and the following disclaimer.
 *  Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in the
 *  documentation and/or other materials provided with the distribution.
 *  Neither the name of the dreamlu.net developer nor the names of its
 *  contributors may be used to endorse or promote products derived from
 *  this software without specific prior written permission.
 *  Author: Chill 庄骞 (smallchill@163.com)
 */
package org.sxkj.gd.utils;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springblade.core.tool.utils.StringUtil;
import org.springframework.web.client.RestTemplate;

import java.net.URI;
import java.nio.charset.StandardCharsets;
import org.springframework.web.util.UriUtils;

public class GdGeoAddressUtil {
	private static final Logger logger = LoggerFactory.getLogger(GdGeoAddressUtil.class);
	private static final String TIAN_DI_TU_KEY = "9171789c872b8cfee7bba45c35a6b955";
	private static final String TIAN_DI_TU_URL = "https://api.tianditu.gov.cn/geocoder";
	private static final RestTemplate REST_TEMPLATE = new RestTemplate();
	private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

	public static String getFormattedAddress(Double longitude, Double latitude) {
		if (longitude == null || latitude == null) {
			return null;
		}
		try {
			String postStr = String.format("{'lon':%s,'lat':%s,'ver':1}", longitude, latitude);
			String address = requestAddress(postStr);
			return StringUtil.isBlank(address) ? null : address;
		} catch (Exception e) {
			logger.warn("天地图逆地理编码调用失败", e);
			return null;
		}
	}

	private static String requestAddress(String postStr) {
		String encodedPostStr = UriUtils.encodeQueryParam(postStr, StandardCharsets.UTF_8);
		String url = TIAN_DI_TU_URL + "?postStr=" + encodedPostStr + "&type=geocode&tk=" + TIAN_DI_TU_KEY;
		URI uri = URI.create(url);
		String response = REST_TEMPLATE.getForObject(uri, String.class);
		if (StringUtil.isBlank(response)) {
			return null;
		}
		try {
			JsonNode root = OBJECT_MAPPER.readTree(response);
			String address = root.path("result").path("formatted_address").asText();
			return StringUtil.isBlank(address) ? null : address;
		} catch (Exception e) {
			logger.warn("解析天地图逆地理编码结果失败", e);
			return null;
		}
	}
}