using Admin.NET.Core.Service;

namespace Admin.NET.Plugin.ApprovalFlow.Service;

/// <summary>
/// 短信推送（P4-16）
/// 由于 Admin.NET 内置的 SysSmsService.SendSms 依赖运营商预注册模板（阿里云/腾讯云/自定义），
/// 动态内容不可塞入；本渠道作用限于通知触达（类似"您有新审批待办，请登录系统处理"），
/// 依赖 NotifyChannelConfig.SmsTemplateId 对应的模板在运营商侧已发布。
/// 未配置 SmsTemplateId / 用户无手机号时静默跳过。
/// </summary>
public class SmsNotifyPusher : INotifyPusher, ITransient
{
    public string Channel => "Sms";

    private readonly SysSmsService _smsService;
    private readonly SqlSugarRepository<SysUser> _userRep;

    public SmsNotifyPusher(SysSmsService smsService, SqlSugarRepository<SysUser> userRep)
    {
        _smsService = smsService;
        _userRep = userRep;
    }

    public bool IsEnabled(NotifyChannelConfig cfg) => cfg?.Sms == true && !string.IsNullOrWhiteSpace(cfg.SmsTemplateId);

    public async Task<FlowNotifyPushResult> PushAsync(List<long> userIds, FlowNotification notification)
    {
        if (userIds.Count == 0) return FlowNotifyPushResult.Ok(0);

        var cfg = App.GetConfig<NotifyChannelConfig>("ApprovalFlow:Notify");
        var tplId = cfg?.SmsTemplateId;
        if (string.IsNullOrWhiteSpace(tplId)) return FlowNotifyPushResult.Ok(0);

        var users = await _userRep.AsQueryable()
            .Where(u => userIds.Contains(u.Id) && !string.IsNullOrEmpty(u.Phone))
            .Select(u => new { u.Id, u.Phone })
            .ToListAsync();

        if (users.Count == 0) return FlowNotifyPushResult.Ok(0);

        var errors = new List<string>();
        var successCount = 0;
        foreach (var user in users)
        {
            try
            {
                await _smsService.SendSms(user.Phone, tplId);
                successCount++;
            }
            catch (Exception ex)
            {
                errors.Add($"[{user.Id}]{ex.Message}");
            }
        }

        if (successCount > 0 && errors.Count == 0)
            return FlowNotifyPushResult.Ok(successCount);
        if (successCount > 0)
            return new FlowNotifyPushResult
            {
                Success = true,
                ActualTargetCount = successCount,
                ErrorMessage = $"部分失败: {string.Join("; ", errors)}"
            };
        return FlowNotifyPushResult.Fail(string.Join("; ", errors));
    }
}