using System;
using System.Net.Http;
using System.Threading.Tasks;
using System.Text.Json;
using Newtonsoft.Json;

namespace ZR.Common;
/// <summary>
/// 
/// </summary>
public class GeoCodeService
{
    public static string ApiKey = "938a85a1cc3114b200522fb7ee579b27";
    public const string BaseUrl = "https://restapi.amap.com/v3/geocode/regeo";

    private readonly HttpClient _httpClient;

    public GeoCodeService(HttpClient httpClient)
    {
        _httpClient = httpClient ?? throw new ArgumentNullException(nameof(httpClient));
    }

    public async Task<(string, string)?> GetReGeoCodeAsync(string location, string coordsys = "gcj02")
    {
        if (string.IsNullOrWhiteSpace(location))
        {
            throw new ArgumentException("Location cannot be null or empty.", nameof(location));
        }

        var requestUrl = $"{BaseUrl}?key={ApiKey}&location={location}&coordsys={coordsys}";

        try
        {
            var response = await _httpClient.GetAsync(requestUrl);
            response.EnsureSuccessStatusCode();
            var content = await response.Content.ReadAsStringAsync();
            var json = JsonDocument.Parse(content);

            // 直接提取 formatted_address
            var j = json.RootElement
                .GetProperty("regeocode")
                .GetProperty("formatted_address")
                .GetString();
            return new(j, content);
        }
        catch (HttpRequestException ex)
        {
            //throw new ApplicationException("Error calling AMap API", ex);

        }
        return new("", "");
    }
}
/// <summary>
/// 高德地图逆地理编码API返回结果
/// </summary>
public class ReGeoCodeResult
{
    /// <summary>
    /// 返回结果状态值
    /// 0：请求失败；1：请求成功
    /// </summary>
    public int Status { get; set; }

    /// <summary>
    /// 返回状态说明
    /// 当status为0时，info返回错误原因；否则返回"OK"
    /// </summary>
    public string Info { get; set; }

    /// <summary>
    /// 返回状态码
    /// </summary>
    public string Infocode { get; set; }

    /// <summary>
    /// 逆地理编码结果
    /// </summary>
    public Regeocode Regeocode { get; set; }
}

/// <summary>
/// 逆地理编码详细信息
/// </summary>
public class Regeocode
{
    /// <summary>
    /// 结构化地址信息
    /// 例如："广东省广州市天河区体育西路189号"
    /// </summary>
    public string Formatted_Address { get; set; }

    /// <summary>
    /// 地址组成元素
    /// 包含国家、省份、城市等信息
    /// </summary>
    public AddressComponent AddressComponent { get; set; }
    // 可以根据需要添加其他字段
}

/// <summary>
/// 地址组成元素
/// </summary>
public class AddressComponent
{
    /// <summary>
    /// 国家名称
    /// 例如："中国"
    /// </summary>
    public string Country { get; set; }

    /// <summary>
    /// 省份名称
    /// 例如："广东省"
    /// </summary>
    public string Province { get; set; }

    /// <summary>
    /// 城市名称
    /// 例如："广州市"
    /// </summary>
    public string City { get; set; }

    /// <summary>
    /// 区县名称
    /// 例如："天河区"
    /// </summary>
    public string District { get; set; }

    /// <summary>
    /// 乡镇/街道名称
    /// 例如："天园街道"
    /// </summary>
    public string Township { get; set; }
    // 可以根据需要添加其他字段
}