using Infrastructure;

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

using ZR.Common.Model;

namespace ZR.Common
{
    /// <summary>
    /// 腾讯地图服务
    /// </summary>
    public class TencentMapService
    {
        private readonly HttpClient _httpClient;
        private readonly string _apiKey = AppSettings.GetConfig("TencentMap:KEY");
        private const string BaseUrl = "https://apis.map.qq.com/";

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

        }

        /// <summary>
        /// 转换 GPS 经纬度到腾讯地图坐标
        /// </summary>
        /// <param name="locations">坐标点，格式：lat,lng;lat,lng</param>
        /// <param name="type">转换类型，默认1表示GPS坐标转腾讯坐标</param>
        /// <returns>转换后的坐标</returns>
        public async Task<MapLocation> GetLocationTranslateAsync(string locations, int type = 1)
        {
            if (string.IsNullOrWhiteSpace(locations))
            {
                throw new ArgumentException("坐标点不能为空", nameof(locations));
            }

            var url = $"{BaseUrl}ws/coord/v1/translate?locations={locations}&type={type}&key={_apiKey}";

            try
            {
                var response = await _httpClient.GetAsync(url);
                response.EnsureSuccessStatusCode();

                var content = await response.Content.ReadAsStringAsync();
                var mapResponse = JsonSerializer.Deserialize<MapApiResponse>(content, new JsonSerializerOptions
                {
                    PropertyNameCaseInsensitive = true
                });

                if (mapResponse?.Status == 0 && mapResponse.Locations?.Count > 0)
                {
                    return mapResponse.Locations[0];
                }
                else
                {
                    throw new Exception($"坐标转换失败: {mapResponse?.Message}");
                }
            }
            catch (HttpRequestException ex)
            {
                throw new Exception("请求腾讯地图API失败", ex);
            }
            catch (JsonException ex)
            {
                throw new Exception("解析腾讯地图API响应失败", ex);
            }
        }

        /// <summary>
        /// 根据转换后的经纬度获取地址
        /// </summary>
        /// <param name="location">坐标点，格式：lat,lng</param>
        /// <returns>地址信息</returns>
        public async Task<string> GetLocationGeocoderAsync(string location)
        {
            if (string.IsNullOrWhiteSpace(location))
            {
                throw new ArgumentException("坐标点不能为空", nameof(location));
            }

            var url = $"{BaseUrl}ws/geocoder/v1/?location={location}&key={_apiKey}";

            try
            {
                var response = await _httpClient.GetAsync(url);
                response.EnsureSuccessStatusCode();

                var content = await response.Content.ReadAsStringAsync();
                var geocoderResponse = JsonSerializer.Deserialize<MapGeocoderApiResponse>(content, new JsonSerializerOptions
                {
                    PropertyNameCaseInsensitive = true
                });

                if (geocoderResponse?.Status == 0 && geocoderResponse.Result != null)
                {
                    return geocoderResponse.Result.Address;
                }
                else
                {
                    throw new Exception($"地理编码失败: {geocoderResponse?.Message}");
                }
            }
            catch (HttpRequestException ex)
            {
                throw new Exception("请求腾讯地图API失败", ex);
            }
            catch (JsonException ex)
            {
                throw new Exception("解析腾讯地图API响应失败", ex);
            }
        }

        /// <summary>
        /// 批量转换GPS坐标并获取地址
        /// </summary>
        /// <param name="locations">坐标点，格式：lat,lng;lat,lng</param>
        /// <returns>转换后的坐标和地址信息</returns>
        public async Task<(MapLocation Location, string Address)> GetLocationTranslateAndGeocoderAsync(string locations)
        {
            var translatedLocation = await GetLocationTranslateAsync(locations);
            var locationString = $"{translatedLocation.Lat},{translatedLocation.Lng}";
            var address = await GetLocationGeocoderAsync(locationString);

            return (translatedLocation, address);
        }
    }
}