using AlibabaCloud.OpenApiClient.Models;
using AlibabaCloud.SDK.Dysmsapi20170525;
using AlibabaCloud.SDK.Dysmsapi20170525.Models;
using Furion.DependencyInjection;
using Furion.FriendlyException;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Newtonsoft.Json;
using SqlSugar;
using Tea;
using YD_Event.Core.Entities;
using YD_Event.Core.Options;

namespace YD_Event.Application.Sms;

/// <summary>
/// 阿里云短信服务实现
/// </summary>
public class AliyunSmsService : ITransient
{
    private readonly SmsOptions _options;
    private readonly ILogger<AliyunSmsService> _logger;
    private readonly ISqlSugarRepository<SysSmsLog> _smsLogRepository;
    private AlibabaCloud.SDK.Dysmsapi20170525.Client _client;

    public AliyunSmsService(IOptions<SmsOptions> options, 
        ILogger<AliyunSmsService> logger,
        ISqlSugarRepository<SysSmsLog> smsLogRepository)
    {
        _options = options.Value;
        _logger = logger;
        _smsLogRepository = smsLogRepository;
        InitClient();
    }

    /// <summary>
    /// 初始化阿里云短信客户端
    /// </summary>
    private void InitClient()
    {
        if (string.IsNullOrWhiteSpace(_options.AccessKeyId) || string.IsNullOrWhiteSpace(_options.AccessKeySecret))
        {
            _logger.LogWarning("阿里云短信配置缺失：AccessKeyId或AccessKeySecret为空");
            return;
        }

        var config = new Config
        {
            AccessKeyId = _options.AccessKeyId,
            AccessKeySecret = _options.AccessKeySecret,
            Endpoint = _options.Endpoint
        };

        try
        {
            _client = new AlibabaCloud.SDK.Dysmsapi20170525.Client(config);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "阿里云短信客户端初始化失败");
        }
    }

    /// <summary>
    /// 发送验证码短信
    /// </summary>
    public async Task SendVerificationCode(string phone, string code)
    {
        // 校验配置
        ValidateConfig();

        if (string.IsNullOrWhiteSpace(_options.VerificationCodeTemplateCode))
            throw Oops.Bah("短信验证码模板未配置");

        var param = JsonConvert.SerializeObject(new { code = code });
        await SendSms(phone, _options.VerificationCodeTemplateCode, param);
    }

    /// <summary>
    /// 发送检录通知短信；未配置检录模板时返回 false 由调用方降级处理。
    /// 模板示例：您报名的${event}正在检录，当前检录至${current}，您所在第${order}场次，请提前前往检录区做好准备。
    /// current 参数格式：{项目名称}第{x}场次。
    /// </summary>
    public async Task<bool> SendCheckinNotice(string phone, string eventName, string currentSession, int sessionOrder)
    {
        if (string.IsNullOrWhiteSpace(_options.CheckinNoticeTemplateCode))
        {
            _logger.LogInformation("检录通知模板未配置，跳过短信发送：{Phone}", phone);
            return false;
        }

        var param = JsonConvert.SerializeObject(new
        {
            @event = eventName,
            current = currentSession,
            order = sessionOrder.ToString()
        });
        await SendSms(phone, _options.CheckinNoticeTemplateCode, param);
        return true;
    }

    /// <summary>
    /// 发送短信核心方法
    /// </summary>
    public async Task SendSms(string phone, string templateCode, string templateParam)
    {
        // 1. 参数校验
        if (string.IsNullOrWhiteSpace(phone)) throw Oops.Bah("手机号不能为空");
        if (string.IsNullOrWhiteSpace(templateCode)) throw Oops.Bah("短信模板不能为空");
        
        ValidateConfig();

        // 2. 构造请求
        var request = new SendSmsRequest
        {
            PhoneNumbers = phone,
            SignName = _options.SignName,
            TemplateCode = templateCode,
            TemplateParam = templateParam
        };

        // 3. 准备运行时配置 (包括重试机制)
        var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions
        {
            Autoretry = true,
            MaxAttempts = 3 // 异常重试最多3次
        };

        // 4. 准备日志实体
        var log = new SysSmsLog
        {
            Phone = phone,
            TemplateCode = templateCode,
            TemplateParam = templateParam,
            CreatedTime = DateTime.Now
        };

        try
        {
            // 5. 发送请求
            var response = await _client.SendSmsWithOptionsAsync(request, runtime);

            // 6. 处理响应
            log.ResponseCode = response.Body.Code;
            log.ResponseMessage = response.Body.Message;
            log.RequestId = response.Body.RequestId;
            log.Success = response.Body.Code == "OK";

            if (!log.Success)
            {
                _logger.LogWarning($"短信发送失败：{phone}, Code: {response.Body.Code}, Message: {response.Body.Message}");
                throw Oops.Bah($"短信发送失败：{response.Body.Message}");
            }
        }
        catch (TeaException error)
        {
            // 阿里云SDK异常
            log.Success = false;
            log.Exception = $"Code: {error.Code}, Message: {error.Message}, Data: {JsonConvert.SerializeObject(error.Data)}";
            _logger.LogError(error, "阿里云短信发送异常: {Message}, Recommend: {Recommend}", error.Message, error.Data != null && error.Data.Contains("Recommend") ? error.Data["Recommend"] : "");
            throw Oops.Bah("短信服务异常，请稍后重试");
        }
        catch (Exception ex)
        {
            // 其他异常（网络等）
            log.Success = false;
            log.Exception = ex.Message;
            _logger.LogError(ex, "短信发送未知异常");
            throw Oops.Bah("短信发送失败，请检查网络或联系管理员");
        }
        finally
        {
            // 7. 日志持久化
            if (_smsLogRepository != null)
            {
                await _smsLogRepository.InsertAsync(log);
            }
        }
    }

    /// <summary>
    /// 校验配置是否有效
    /// </summary>
    public void ValidateConfig()
    {
        if (_client == null)
        {
            InitClient();
            if (_client == null)
                throw Oops.Bah("短信服务未初始化，请检查AccessKeyId和AccessKeySecret配置");
        }

        if (string.IsNullOrWhiteSpace(_options.SignName))
            throw Oops.Bah("短信签名(SignName)未配置");
            
        if (string.IsNullOrWhiteSpace(_options.VerificationCodeTemplateCode))
            throw Oops.Bah("验证码模板(VerificationCodeTemplateCode)未配置");
    }
}