using LiveForum.IService.Others;
using LiveForum.Model.Dto.Wechat;

using Microsoft.Extensions.Logging;

using SKIT.FlurlHttpClient.Wechat.Api;
using SKIT.FlurlHttpClient.Wechat.Api.Models;

using System;
using System.Threading.Tasks;

namespace LiveForum.Service.Others
{
    /// <summary>
    /// 微信小程序服务实现
    /// 使用 SKIT.FlurlHttpClient.Wechat.Api 实现
    /// </summary>
    public class WechatMiniProgramService : IWechatMiniProgramService
    {
        private readonly IWechatApiClientManager _clientManager;
        private readonly ILogger<WechatMiniProgramService> _logger;

        public WechatMiniProgramService(
            IWechatApiClientManager clientManager,
            ILogger<WechatMiniProgramService> logger)
        {
            _clientManager = clientManager ?? throw new ArgumentNullException(nameof(clientManager));
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
        }

        /// <summary>
        /// 通过 code 获取用户的 openId 和 sessionKey
        /// </summary>
        public async Task<WechatLoginInfoDto> GetLoginInfoByCodeAsync(string jsCode)
        {
            if (string.IsNullOrWhiteSpace(jsCode))
            {
                throw new ArgumentException("jsCode 不能为空", nameof(jsCode));
            }

            try
            {
                // 从 Manager 获取最新客户端实例（支持动态配置更新）
                var client = _clientManager.GetClient();
                if (client == null)
                {
                    _logger.LogError("微信 API 客户端不可用");
                    return new WechatLoginInfoDto
                    {
                        IsSuccessful = false,
                        ErrorMessage = "微信 API 客户端不可用，请检查配置"
                    };
                }

                // 调用微信 API
                var request = new SnsJsCode2SessionRequest
                {
                    JsCode = jsCode
                };

                var response = await client.ExecuteSnsJsCode2SessionAsync(request);

                // 转换为业务 DTO
                return new WechatLoginInfoDto
                {
                    OpenId = response.OpenId,
                    SessionKey = response.SessionKey,
                    UnionId = response.UnionId,
                    IsSuccessful = response.IsSuccessful(),
                    ErrorCode = response.ErrorCode,
                    ErrorMessage = response.ErrorMessage
                };
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "获取微信登录信息失败，jsCode: {JsCode}", jsCode?.Substring(0, Math.Min(10, jsCode?.Length ?? 0)));
                return new WechatLoginInfoDto
                {
                    IsSuccessful = false,
                    ErrorMessage = $"获取微信登录信息失败：{ex.Message}"
                };
            }
        }

        /// <summary>
        /// 通过手机号 code 获取用户手机号
        /// </summary>
        public async Task<string?> GetPhoneNumberByCodeAsync(string phoneCode)
        {
            if (string.IsNullOrWhiteSpace(phoneCode))
            {
                throw new ArgumentException("phoneCode 不能为空", nameof(phoneCode));
            }

            try
            {
                var client = _clientManager.GetClient();
                if (client == null)
                {
                    _logger.LogError("微信 API 客户端不可用");
                    return null;
                }

                // 获取手机号接口需要 access_token，先获取它
                var accessTokenRequest = new CgibinTokenRequest();
                var accessTokenResponse = await client.ExecuteCgibinTokenAsync(accessTokenRequest);

                if (!accessTokenResponse.IsSuccessful())
                {
                    _logger.LogError("获取 access_token 失败: ErrorCode={ErrorCode}, ErrorMessage={ErrorMessage}",
                        accessTokenResponse.ErrorCode, accessTokenResponse.ErrorMessage);
                    return null;
                }

                _logger.LogInformation("获取 access_token 成功, token前10位: {TokenPrefix}...",
                    accessTokenResponse.AccessToken?.Substring(0, Math.Min(10, accessTokenResponse.AccessToken?.Length ?? 0)));

                var request = new WxaBusinessGetUserPhoneNumberRequest
                {
                    Code = phoneCode,
                    AccessToken = accessTokenResponse.AccessToken
                };

                _logger.LogInformation("开始获取手机号, phoneCode前10位: {PhoneCodePrefix}..., AccessToken是否存在: {HasToken}",
                    phoneCode?.Substring(0, Math.Min(10, phoneCode?.Length ?? 0)),
                    !string.IsNullOrEmpty(request.AccessToken));

                var response = await client.ExecuteWxaBusinessGetUserPhoneNumberAsync(request);

                if (response.IsSuccessful() && response.PhoneInfo != null)
                {
                    _logger.LogInformation("获取手机号成功: {Phone}", response.PhoneInfo.PurePhoneNumber ?? response.PhoneInfo.PhoneNumber);
                    return response.PhoneInfo.PurePhoneNumber ?? response.PhoneInfo.PhoneNumber;
                }

                _logger.LogWarning("获取手机号失败: ErrorCode={ErrorCode}, ErrorMessage={ErrorMessage}",
                    response.ErrorCode, response.ErrorMessage);
                return null;
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "获取微信手机号异常");
                return null;
            }
        }
    }
}