using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using YD_Event.Application.Event.Dtos;
using YD_Event.Core.Domain;
using YD_Event.Core.Domain.Pricing;
using YD_Event.Core.Domain.Pricing.Models;
using YD_Event.Core.Entities;
using YD_Event.Core.Enum;
using YD_Event.Core.Infrastructure.WeChat;
using YD_Event.Core.Infrastructure.WeChat.Dto;
using YD_Event.Core.Options;

namespace YD_Event.Application.Event;

/// <summary>
/// 统一报名处理服务
/// </summary>
public class UnifiedRegistrationService : ITransient
{
    private readonly ISqlSugarRepository<EventInfo> _eventRepository;
    private readonly ISqlSugarRepository<EventUnit> _unitRepository;
    private readonly ISqlSugarRepository<EventProject> _eventProjectRepository;
    private readonly ISqlSugarRepository<EventProjectGroup> _eventProjectGroupRepository;
    private readonly ISqlSugarRepository<ProjectGroup> _projectGroupRepository;
    private readonly ISqlSugarRepository<EventProjectRegistrationLimit> _projectLimitRepository;
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.Project> _projectRepository;
    private readonly ISqlSugarRepository<EventRegistration> _registrationRepository;
    private readonly ISqlSugarRepository<EventRegistrationItem> _registrationItemRepository;
    private readonly ISqlSugarRepository<EventRegistrationPerson> _registrationPersonRepository;
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.AppUser> _userRepository;
    private readonly ISqlSugarRepository<SysUser> _sysUserRepository;
    private readonly ISqlSugarRepository<EventFeeConfig> _feeConfigRepository;
    private readonly ISqlSugarRepository<EventRegistrationLimit> _limitRepository;
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.Order> _orderRepository;
    private readonly ISqlSugarRepository<WeChatPayConfig> _weChatPayConfigRepository;
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.Merchant> _merchantRepository;
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.Coupon> _couponRepository;
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.UserCoupon> _userCouponRepository;
    private readonly ISqlSugarRepository<EventRegistrationPayment> _paymentRepository;
    private readonly ISqlSugarRepository<MerchantCertification> _merchantCertificationRepository;
    private readonly ISqlSugarClient _db;
    private readonly IIdGenerator _idGenerator;
    private readonly WeChatPayService _weChatPayService;
    private readonly IOptionsMonitor<WechatTenpayClientOptions> _wechatTenpayClientOptionsMonitor;
    private readonly ILogger<UnifiedRegistrationService> _logger;
    private readonly OrderNoGeneratorService _orderNoGeneratorService;

    public UnifiedRegistrationService(
        ISqlSugarRepository<EventInfo> eventRepository,
        ISqlSugarRepository<EventUnit> unitRepository,
        ISqlSugarRepository<EventProject> eventProjectRepository,
        ISqlSugarRepository<EventProjectGroup> eventProjectGroupRepository,
        ISqlSugarRepository<ProjectGroup> projectGroupRepository,
        ISqlSugarRepository<EventProjectRegistrationLimit> projectLimitRepository,
        ISqlSugarRepository<YD_Event.Core.Entities.Project> projectRepository,
        ISqlSugarRepository<EventRegistration> registrationRepository,
        ISqlSugarRepository<EventRegistrationItem> registrationItemRepository,
        ISqlSugarRepository<EventRegistrationPerson> registrationPersonRepository,
        ISqlSugarRepository<YD_Event.Core.Entities.AppUser> userRepository,
        ISqlSugarRepository<SysUser> sysUserRepository,
        ISqlSugarRepository<EventFeeConfig> feeConfigRepository,
        ISqlSugarRepository<EventRegistrationLimit> limitRepository,
        ISqlSugarRepository<YD_Event.Core.Entities.Order> orderRepository,
        ISqlSugarRepository<WeChatPayConfig> weChatPayConfigRepository,
        ISqlSugarRepository<YD_Event.Core.Entities.Merchant> merchantRepository,
        ISqlSugarRepository<YD_Event.Core.Entities.Coupon> couponRepository,
        ISqlSugarRepository<YD_Event.Core.Entities.UserCoupon> userCouponRepository,
        ISqlSugarRepository<EventRegistrationPayment> paymentRepository,
        ISqlSugarRepository<MerchantCertification> merchantCertificationRepository,
        ISqlSugarClient db,
        IIdGenerator idGenerator,
        WeChatPayService weChatPayService,
        IOptionsMonitor<WechatTenpayClientOptions> wechatTenpayClientOptionsMonitor,
        ILogger<UnifiedRegistrationService> logger,
        OrderNoGeneratorService orderNoGeneratorService)
    {
        _eventRepository = eventRepository;
        _unitRepository = unitRepository;
        _eventProjectRepository = eventProjectRepository;
        _eventProjectGroupRepository = eventProjectGroupRepository;
        _projectGroupRepository = projectGroupRepository;
        _projectLimitRepository = projectLimitRepository;
        _projectRepository = projectRepository;
        _registrationRepository = registrationRepository;
        _registrationItemRepository = registrationItemRepository;
        _registrationPersonRepository = registrationPersonRepository;
        _userRepository = userRepository;
        _sysUserRepository = sysUserRepository;
        _feeConfigRepository = feeConfigRepository;
        _limitRepository = limitRepository;
        _orderRepository = orderRepository;
        _weChatPayConfigRepository = weChatPayConfigRepository;
        _merchantRepository = merchantRepository;
        _couponRepository = couponRepository;
        _userCouponRepository = userCouponRepository;
        _paymentRepository = paymentRepository;
        _merchantCertificationRepository = merchantCertificationRepository;
        _db = db;
        _idGenerator = idGenerator;
        _weChatPayService = weChatPayService;
        _wechatTenpayClientOptionsMonitor = wechatTenpayClientOptionsMonitor;
        _logger = logger;
        _orderNoGeneratorService = orderNoGeneratorService;
    }

    /// <summary>
    /// 统一报名方法A - 处理核心报名业务逻辑
    /// </summary>
    [UnitOfWork]
    public async Task<UnifiedRegistrationOutput> ProcessRegistrationAsync(UnifiedRegistrationInput input)
    {
        _logger.LogInformation("开始处理统一报名，赛事ID: {EventId}, 模式: {Mode}", input.EventId, input.RegistrationMode);

        // 1. 验证报名
        var validationResult = await ValidateRegistrationAsync(input);
        if (!validationResult.IsValid)
        {
            throw Oops.Bah(validationResult.ErrorMessage ?? "报名验证失败");
        }

        // 2. 检查是否已有报名记录
        var existingRegistration = await _registrationRepository.GetFirstAsync(
            r => r.EventId == input.EventId && r.CreatedUserId == input.CreatedUserId && r.PaymentStatus != 4);

        EventRegistration registration;
        if (existingRegistration != null)
        {
            // 更新现有报名
            registration = existingRegistration;
            registration.RegistrationMode = input.RegistrationMode;
            registration.TeamName = input.RegistrationMode == 2 ? input.TeamName : null;
            registration.ContactName = input.ContactName;
            registration.ContactPhone = input.ContactPhone;
            registration.PaymentStatus = 0;
            registration.UpdatedTime = DateTime.Now;
            registration.UpdatedUserId = input.CreatedUserId;

            // 删除旧的明细和人员
            await _registrationItemRepository.DeleteAsync(x => x.RegistrationId == registration.Id);
            await _registrationPersonRepository.DeleteAsync(x => x.RegistrationId == registration.Id);
        }
        else
        {
            // 创建新报名
            registration = new EventRegistration
            {
                Id = _idGenerator.NewLong(),
                EventId = input.EventId,
                RegistrationMode = input.RegistrationMode,
                TeamName = input.RegistrationMode == 2 ? input.TeamName : null,
                ContactName = input.ContactName,
                ContactPhone = input.ContactPhone,
                PaymentStatus = 0,
                RegistrationTime = DateTime.Now,
                CreatedUserId = input.CreatedUserId,
                CreatedTime = DateTime.Now,
                Status = AvailabilityStatus.Enable,
                OrderNo = string.Empty
            };
            await _registrationRepository.InsertAsync(registration);
        }

        // 3. 创建报名明细和参赛人员
        var (totalAmount, totalPersonCount) = await CreateRegistrationDetailsAsync(registration, input);

        // 4. 更新报名信息
        registration.TotalAmount = totalAmount;
        registration.TotalPersonCount = totalPersonCount;
        await _registrationRepository.UpdateAsync(registration);

        _logger.LogInformation("统一报名处理完成，报名ID: {RegistrationId}", registration.Id);

        return new UnifiedRegistrationOutput
        {
            RegistrationId = registration.Id,
            OrderNo = registration.OrderNo,
            OriginalAmount = totalAmount,
            DiscountAmount = 0,
            ActualAmount = totalAmount,
            PaymentStatus = registration.PaymentStatus
        };
    }

    /// <summary>
    /// 统一支付处理方法 - 处理支付相关逻辑
    /// </summary>
    [UnitOfWork]
    public async Task<UnifiedPaymentOutput> ProcessPaymentAsync(UnifiedPaymentInput input)
    {
        _logger.LogInformation("开始处理统一支付，报名ID: {RegistrationId}, 支付方式: {PaymentMethod}", 
            input.RegistrationId, input.PaymentMethod);

        // 1. 获取报名信息
        var registration = await _registrationRepository.GetByIdAsync(input.RegistrationId);
        if (registration == null)
        {
            throw Oops.Bah("报名记录不存在");
        }

        // 2. 获取赛事信息
        var eventInfo = await _eventRepository.GetByIdAsync(registration.EventId);
        if (eventInfo == null)
        {
            throw Oops.Bah("赛事信息不存在");
        }

        // 3. 计算优惠后金额
        var (originalAmount, discountAmount, finalAmount, usedCoupon, usedUserCoupon) = 
            await CalculateFinalAmountAsync(registration.TotalAmount, input.CouponId, input.OperatorUserId);

        // 4. 构建支付输出对象
        var output = new UnifiedPaymentOutput
        {
            RegistrationId = registration.Id,
            OrderNo = registration.OrderNo,
            OriginalAmount = originalAmount,
            DiscountAmount = discountAmount,
            ActualAmount = finalAmount,
            PaymentStatus = 0,
            IsFree = finalAmount <= 0,
            CouponRuleNote = usedCoupon != null ? "优惠券使用后不予退还" : null
        };

        // 5. 处理免费情况
        if (finalAmount <= 0)
        {
            await HandleFreePaymentAsync(registration, usedUserCoupon, input.OperatorUserId);
            output.PaymentStatus = 1;
            return output;
        }

        // 6. 生成订单号
        if (string.IsNullOrEmpty(registration.OrderNo))
        {
            registration.OrderNo = await _orderNoGeneratorService.GenerateOrderNoAsync();
            output.OrderNo = registration.OrderNo;
        }
        registration.PaymentMethod = input.PaymentMethod;
        registration.PaymentStatus = 0;
        await _registrationRepository.UpdateAsync(registration);

        // 7. 创建订单记录
        await CreateOrderAsync(registration, eventInfo, originalAmount, discountAmount, finalAmount, 
            input.CouponId, input.OperatorUserId);

        // 8. 根据支付方式处理
        if (input.PaymentMethod == 2) // 线上支付
        {
            var onlinePaymentOutput = await HandleOnlinePaymentAsync(registration, eventInfo, finalAmount, input);
            output.WechatPayParams = onlinePaymentOutput.WechatPayParams;
            output.QrcodeUrl = onlinePaymentOutput.QrcodeUrl;
            output.TradeType = onlinePaymentOutput.TradeType;
        }
        else // 线下支付
        {
            var offlinePaymentOutput = await HandleOfflinePaymentAsync(registration, input);
            output.PaymentStatus = offlinePaymentOutput.PaymentStatus;
        }

        return output;
    }

    /// <summary>
    /// 验证报名
    /// </summary>
    private async Task<RegistrationValidationResult> ValidateRegistrationAsync(UnifiedRegistrationInput input)
    {
        var result = new RegistrationValidationResult
        {
            IsValid = true,
            Details = new List<ValidationDetail>()
        };

        // 1. 验证赛事是否存在且可报名
        var eventInfo = await _eventRepository.GetByIdAsync(input.EventId);
        if (eventInfo == null)
        {
            result.IsValid = false;
            result.ErrorMessage = "赛事不存在";
            result.Details.Add(new ValidationDetail { ItemName = "赛事验证", IsPassed = false, Message = "赛事不存在" });
            return result;
        }

        // 2. 验证报名时间
        var now = DateTime.Now;
        if (now < eventInfo.RegistrationStartTime || now > eventInfo.RegistrationEndTime)
        {
            result.IsValid = false;
            result.ErrorMessage = "不在报名时间内";
            result.Details.Add(new ValidationDetail { ItemName = "时间验证", IsPassed = false, Message = "不在报名时间内" });
            return result;
        }

        // 3. 验证项目选择（一阶段：单选机制，每个项目只能选择一个组别）
        var projectSelectionResult = await ValidateProjectSelectionAsync(input);
        if (!projectSelectionResult.IsValid)
        {
            result.IsValid = false;
            result.ErrorMessage = projectSelectionResult.ErrorMessage;
            result.Details.AddRange(projectSelectionResult.Details);
            return result;
        }
        result.Details.AddRange(projectSelectionResult.Details);

        // 4. 验证队员分配（二阶段：人数校验、资质验证、年龄跨组等）
        var teamAssignmentResult = await ValidateTeamAssignmentAsync(input);
        if (!teamAssignmentResult.IsValid)
        {
            result.IsValid = false;
            result.ErrorMessage = teamAssignmentResult.ErrorMessage;
            result.Details.AddRange(teamAssignmentResult.Details);
            return result;
        }
        result.Details.AddRange(teamAssignmentResult.Details);

        // 5. 验证报名限制
        var limitCheckResult = await CheckRegistrationLimitAsync(input);
        if (limitCheckResult.HasLimit)
        {
            result.IsValid = false;
            var firstLimit = limitCheckResult.LimitDetails.FirstOrDefault();
            result.ErrorMessage = firstLimit?.LimitMessage ?? "报名限制检查失败";
            result.Details.AddRange(limitCheckResult.LimitDetails.Select(l => new ValidationDetail
            {
                ItemName = l.LimitType,
                IsPassed = false,
                Message = l.LimitMessage
            }));
            return result;
        }

        result.Details.Add(new ValidationDetail { ItemName = "整体验证", IsPassed = true, Message = "验证通过" });
        return result;
    }

    /// <summary>
    /// 验证项目选择（一阶段：单选机制）
    /// </summary>
    private async Task<RegistrationValidationResult> ValidateProjectSelectionAsync(UnifiedRegistrationInput input)
    {
        var result = new RegistrationValidationResult
        {
            IsValid = true,
            Details = new List<ValidationDetail>()
        };

        // 1. 检查是否有重复选择的项目（每个项目只能选择一个组别）
        var duplicateProjects = input.Items
            .GroupBy(i => i.ProjectId)
            .Where(g => g.Count() > 1)
            .Select(g => g.Key)
            .ToList();

        if (duplicateProjects.Any())
        {
            var eventProjects = await _eventProjectRepository.GetListAsync(x => duplicateProjects.Contains(x.Id));
            var projectNames = eventProjects.Select(ep => $"{ep.ProjectId}").ToList();
            
            result.IsValid = false;
            result.ErrorMessage = $"以下项目被重复选择，请确保每个项目只选择一个组别：{string.Join(", ", projectNames)}";
            result.Details.Add(new ValidationDetail 
            { 
                ItemName = "项目选择", 
                IsPassed = false, 
                Message = result.ErrorMessage 
            });
            return result;
        }

        result.Details.Add(new ValidationDetail 
        { 
            ItemName = "项目单选机制", 
            IsPassed = true, 
            Message = "每个项目仅选择一个组别，符合要求" 
        });

        return result;
    }

    /// <summary>
    /// 验证队员分配（二阶段）
    /// </summary>
    private async Task<RegistrationValidationResult> ValidateTeamAssignmentAsync(UnifiedRegistrationInput input)
    {
        var result = new RegistrationValidationResult
        {
            IsValid = true,
            Details = new List<ValidationDetail>()
        };

        var eventProjectIds = input.Items.Select(i => i.ProjectId).Distinct().ToList();
        var eventProjects = await _eventProjectRepository.GetListAsync(x => eventProjectIds.Contains(x.Id));
        var eventProjectGroups = await _eventProjectGroupRepository.GetListAsync(x => eventProjectIds.Contains(x.EventProjectId));

        foreach (var item in input.Items)
        {
            var eventProject = eventProjects.FirstOrDefault(ep => ep.Id == item.ProjectId);
            if (eventProject == null) continue;

            var eventProjectGroup = eventProjectGroups.FirstOrDefault(epg => epg.Id == item.GroupId);
            if (eventProjectGroup == null)
            {
                result.IsValid = false;
                result.ErrorMessage = $"项目组别不存在";
                result.Details.Add(new ValidationDetail 
                { 
                    ItemName = "组别验证", 
                    IsPassed = false, 
                    Message = result.ErrorMessage 
                });
                return result;
            }

            // 2.1 验证队员资质（年龄和性别）
            var qualificationResult = ValidatePersonQualifications(item.Persons, eventProjectGroup);
            if (!qualificationResult.IsValid)
            {
                result.IsValid = false;
                result.ErrorMessage = qualificationResult.ErrorMessage;
                result.Details.AddRange(qualificationResult.Details);
                return result;
            }
            result.Details.AddRange(qualificationResult.Details);

            // 2.2 验证年龄跨组
            var ageGroupResult = ValidateAgeCrossGroup(item.Persons, eventProjectGroup);
            if (!ageGroupResult.IsValid)
            {
                result.IsValid = false;
                result.ErrorMessage = ageGroupResult.ErrorMessage;
                result.Details.AddRange(ageGroupResult.Details);
                return result;
            }
            result.Details.AddRange(ageGroupResult.Details);
        }

        return result;
    }

    /// <summary>
    /// 验证队员资质（年龄和性别）
    /// </summary>
    private RegistrationValidationResult ValidatePersonQualifications(List<UnifiedPersonInput> persons, EventProjectGroup group)
    {
        var result = new RegistrationValidationResult
        {
            IsValid = true,
            Details = new List<ValidationDetail>()
        };

        foreach (var person in persons)
        {
            // 验证性别
            if (person.Gender != group.Gender)
            {
                result.IsValid = false;
                result.ErrorMessage = $"队员{person.Name}的性别不符合组别要求。要求：{group.Gender.Description()}，实际：{person.Gender.Description()}";
                result.Details.Add(new ValidationDetail 
                { 
                    ItemName = "性别验证", 
                    IsPassed = false, 
                    Message = result.ErrorMessage 
                });
                return result;
            }

            // 验证年龄
            var age = CalculateAge(person.BirthDate);
            if (person.BirthDate < group.BirthDateStart || person.BirthDate > group.BirthDateEnd)
            {
                result.IsValid = false;
                result.ErrorMessage = $"队员{person.Name}的年龄不符合组别要求。要求出生日期范围：{group.BirthDateStart:yyyy-MM-dd} 至 {group.BirthDateEnd:yyyy-MM-dd}，实际：{person.BirthDate:yyyy-MM-dd}";
                result.Details.Add(new ValidationDetail 
                { 
                    ItemName = "年龄验证", 
                    IsPassed = false, 
                    Message = result.ErrorMessage 
                });
                return result;
            }
        }

        result.Details.Add(new ValidationDetail 
        { 
            ItemName = "队员资质", 
            IsPassed = true, 
            Message = "所有队员的年龄和性别均符合组别要求" 
        });

        return result;
    }

    /// <summary>
    /// 验证年龄跨组
    /// 支持小年龄段向大年龄段跨组报名，需满足两个条件：
    /// ①团队中至少有一名成员属于目标年龄段；
    /// ②仅允许跨一个年龄段
    /// </summary>
    private RegistrationValidationResult ValidateAgeCrossGroup(List<UnifiedPersonInput> persons, EventProjectGroup targetGroup)
    {
        var result = new RegistrationValidationResult
        {
            IsValid = true,
            Details = new List<ValidationDetail>()
        };

        bool hasAtLeastOneInTargetAge = false;
        bool hasAnyBelowTargetAge = false;

        foreach (var person in persons)
        {
            if (person.BirthDate >= targetGroup.BirthDateStart && person.BirthDate <= targetGroup.BirthDateEnd)
            {
                hasAtLeastOneInTargetAge = true;
            }
            else if (person.BirthDate < targetGroup.BirthDateStart)
            {
                hasAnyBelowTargetAge = true;
            }
        }

        // 如果有队员年龄低于目标年龄段（小年龄跨大年龄）
        if (hasAnyBelowTargetAge)
        {
            // 检查是否至少有一名队员在目标年龄段
            if (!hasAtLeastOneInTargetAge)
            {
                result.IsValid = false;
                result.ErrorMessage = "跨组报名时，团队中至少需要有一名成员属于目标年龄段";
                result.Details.Add(new ValidationDetail 
                { 
                    ItemName = "年龄跨组验证", 
                    IsPassed = false, 
                    Message = result.ErrorMessage 
                });
                return result;
            }

            result.Details.Add(new ValidationDetail 
            { 
                ItemName = "年龄跨组", 
                IsPassed = true, 
                Message = "符合年龄跨组报名要求" 
            });
        }
        else
        {
            result.Details.Add(new ValidationDetail 
            { 
                ItemName = "年龄跨组", 
                IsPassed = true, 
                Message = "无需跨组，所有队员均在目标年龄段内" 
            });
        }

        return result;
    }

    /// <summary>
    /// 创建报名明细和参赛人员
    /// </summary>
    private async Task<(decimal totalAmount, int totalPersonCount)> CreateRegistrationDetailsAsync(
        EventRegistration registration, UnifiedRegistrationInput input)
    {
        // 获取相关数据
        var eventProjectIds = input.Items.Select(i => i.ProjectId).Distinct().ToList();
        var eventProjects = await _eventProjectRepository.GetListAsync(x => eventProjectIds.Contains(x.Id));
        var projectIds = eventProjects.Select(x => x.ProjectId).Distinct().ToList();
        var baseProjects = await _projectRepository.GetListAsync(x => projectIds.Contains(x.Id));
        var eventProjectGroups = await _eventProjectGroupRepository.GetListAsync(x => eventProjectIds.Contains(x.EventProjectId));
        var feeConfig = await _feeConfigRepository.GetFirstAsync(x => x.EventId == input.EventId && !x.DeleteMark);

        var regItems = new List<EventRegistrationItem>();
        var persons = new List<EventRegistrationPerson>();
        int totalPersonCount = 0;

        foreach (var item in input.Items)
        {
            var eventProject = eventProjects.FirstOrDefault(p => p.Id == item.ProjectId);
            if (eventProject == null) continue;

            var baseProject = baseProjects.FirstOrDefault(p => p.Id == eventProject.ProjectId);
            var groupName = GetGroupName(item, eventProjectGroups);

            // 计算费用
            var (unitPrice, totalPrice) = CalculateItemPrice(feeConfig, eventProject, item.Persons.Count);

            var regItemId = _idGenerator.NewLong();
            var regItem = new EventRegistrationItem
            {
                Id = regItemId,
                RegistrationId = registration.Id,
                ProjectId = item.ProjectId,
                EventProjectGroupId = item.GroupId,
                ProjectName = baseProject?.Name ?? "",
                GroupName = groupName,
                ProjectTypeName = baseProject?.ProjectType.Description() ?? "",
                UnitPrice = unitPrice,
                PersonCount = item.Persons.Count,
                TotalPrice = totalPrice,
                CreatedUserId = input.CreatedUserId,
                CreatedTime = DateTime.Now
            };
            regItems.Add(regItem);

            totalPersonCount += item.Persons.Count;

            // 添加参赛人员
            foreach (var pInput in item.Persons)
            {
                persons.Add(new EventRegistrationPerson
                {
                    Id = _idGenerator.NewLong(),
                    RegistrationId = registration.Id,
                    RegistrationItemId = regItemId,
                    ProjectId = item.ProjectId,
                    EventProjectGroupId = item.GroupId,
                    GroupName = groupName,
                    ProjectName = baseProject?.Name ?? "",
                    Name = pInput.Name,
                    Gender = pInput.Gender,
                    IdCard = pInput.IdCardNumber,
                    BirthDate = pInput.BirthDate,
                    Phone = pInput.Mobile,
                    Age = CalculateAge(pInput.BirthDate),
                    PersonType = PersonType.Athlete,
                    CreatedUserId = input.CreatedUserId,
                    CreatedTime = DateTime.Now
                });
            }
        }

        await _registrationItemRepository.InsertRangeAsync(regItems);
        await _registrationPersonRepository.InsertRangeAsync(persons);

        // 计算总费用
        var totalAmount = CalculateTotalAmount(feeConfig, eventProjects, input.Items, totalPersonCount);

        return (totalAmount, totalPersonCount);
    }

    /// <summary>
    /// 计算最终金额（含优惠券）
    /// </summary>
    private async Task<(decimal originalAmount, decimal discountAmount, decimal finalAmount, YD_Event.Core.Entities.Coupon? coupon, YD_Event.Core.Entities.UserCoupon? userCoupon)> 
        CalculateFinalAmountAsync(decimal originalAmount, long? couponId, long userId)
    {
        decimal discountAmount = 0;
        decimal finalAmount = originalAmount;
        YD_Event.Core.Entities.Coupon? coupon = null;
        YD_Event.Core.Entities.UserCoupon? userCoupon = null;

        if (couponId.HasValue)
        {
            coupon = await _couponRepository.GetFirstAsync(c => 
                c.Id == couponId.Value && c.Status == AvailabilityStatus.Enable && !c.DeleteMark);
            
            if (coupon != null)
            {
                userCoupon = await _userCouponRepository.GetFirstAsync(uc => 
                    uc.CouponId == coupon.Id && uc.UserId == userId && uc.Status == 0 && !uc.DeleteMark);
                
                if (userCoupon != null)
                {
                    if (coupon.Type == 0) // 折扣
                    {
                        discountAmount = originalAmount * (1 - coupon.Value / 100);
                    }
                    else if (coupon.Type == 1) // 定额
                    {
                        discountAmount = Math.Min(coupon.Value, originalAmount);
                    }
                    
                    finalAmount = originalAmount - discountAmount;
                    finalAmount = Math.Max(0, finalAmount);
                }
            }
        }

        return (originalAmount, discountAmount, finalAmount, coupon, userCoupon);
    }

    /// <summary>
    /// 处理免费支付
    /// </summary>
    private async Task HandleFreePaymentAsync(EventRegistration registration, YD_Event.Core.Entities.UserCoupon? userCoupon, long operatorUserId)
    {
        if (userCoupon != null)
        {
            userCoupon.Status = 1;
            userCoupon.UseTime = DateTime.Now;
            await _userCouponRepository.UpdateAsync(userCoupon);
        }

        registration.PaymentStatus = 1;
        registration.PaymentTime = DateTime.Now;
        registration.UpdatedTime = DateTime.Now;
        registration.UpdatedUserId = operatorUserId;
        await _registrationRepository.UpdateAsync(registration);
    }

    /// <summary>
    /// 创建订单记录
    /// </summary>
    private async Task<YD_Event.Core.Entities.Order> CreateOrderAsync(EventRegistration registration, EventInfo eventInfo, 
        decimal originalAmount, decimal discountAmount, decimal finalAmount, long? couponId, long operatorUserId)
    {
        var certification = await _merchantCertificationRepository.GetFirstAsync(c => 
            c.UserId == registration.CreatedUserId && c.AuditStatus == AuditStatus.Pass && !c.DeleteMark);

        var order = new YD_Event.Core.Entities.Order
        {
            Id = _idGenerator.NewLong(),
            OrderNo = registration.OrderNo,
            OrderType = 1,
            MerchantId = eventInfo.MerchantId,
            MerchantCertificationId = certification?.Id,
            EventId = registration.EventId,
            RegistrationId = registration.Id,
            OriginalAmount = originalAmount,
            ActualAmount = finalAmount,
            DiscountAmount = discountAmount,
            CouponId = couponId,
            OrderStatus = OrderStatus.Pending,
            CreatedTime = DateTime.Now,
            CreatedUserId = operatorUserId,
            Status = AvailabilityStatus.Enable
        };
        await _orderRepository.InsertAsync(order);
        return order;
    }

    /// <summary>
    /// 处理线上支付
    /// </summary>
    private async Task<UnifiedPaymentOutput> HandleOnlinePaymentAsync(EventRegistration registration, 
        EventInfo eventInfo, decimal finalAmount, UnifiedPaymentInput input)
    {
        WeChatPayConfig? payConfig = null;
        if (eventInfo.MerchantId.HasValue)
        {
            payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
                x.MerchantId == eventInfo.MerchantId.Value && x.Status == AvailabilityStatus.Enable && !x.DeleteMark);
        }

        if (payConfig == null)
        {
            throw Oops.Bah("商户微信支付配置不存在");
        }

        var configOptions = _wechatTenpayClientOptionsMonitor.CurrentValue;
        var output = new UnifiedPaymentOutput
        {
            RegistrationId = registration.Id,
            OrderNo = registration.OrderNo,
            PaymentStatus = 0,
            IsFree = false
        };

        if (!string.IsNullOrEmpty(input.OpenId))
        {
            // JSAPI支付
            var jsapiRequest = new CreateJsApiPayRequest
            {
                OutTradeNo = registration.OrderNo,
                AppId = configOptions.AppId,
                Description = $"{eventInfo.EventName} - 报名费",
                NotifyUrl = configOptions.NotifyUrl,
                TotalAmount = AmountHelper.YuanToFen(finalAmount),
                ExpireTime = DateTimeOffset.Now.AddMinutes(30),
                OpenId = input.OpenId
            };

            var payResult = await _weChatPayService.CreateJsApiPayAsync(payConfig, jsapiRequest);
            if (payResult.Success && payResult.JsApiParameters != null)
            {
                output.WechatPayParams = new
                {
                    appId = payResult.JsApiParameters.AppId,
                    timeStamp = payResult.JsApiParameters.TimeStamp,
                    nonceStr = payResult.JsApiParameters.NonceStr,
                    package = payResult.JsApiParameters.Package,
                    signType = payResult.JsApiParameters.SignType,
                    paySign = payResult.JsApiParameters.PaySign
                };
                output.TradeType = payResult.TradeType;
                _logger.LogInformation("微信JSAPI支付下单成功，订单号：{OrderNo}", registration.OrderNo);
            }
            else
            {
                _logger.LogError("微信JSAPI支付下单失败，订单号：{OrderNo}，错误：{Error}", registration.OrderNo, payResult.Message);
                throw Oops.Bah($"微信统一下单失败：{payResult.Message}");
            }
        }
        else
        {
            // Native支付
            var nativeRequest = new CreateNativePayRequest
            {
                OutTradeNo = registration.OrderNo,
                AppId = configOptions.AppId,
                Description = $"{eventInfo.EventName} - 报名费",
                NotifyUrl = configOptions.NotifyUrl,
                TotalAmount = AmountHelper.YuanToFen(finalAmount),
                ExpireTime = DateTimeOffset.Now.AddMinutes(5)
            };

            var payResult = await _weChatPayService.CreateNativePayAsync(payConfig, nativeRequest);
            if (payResult.Success)
            {
                output.QrcodeUrl = payResult.QrcodeUrl;
                output.TradeType = payResult.TradeType;
                _logger.LogInformation("微信Native支付下单成功，订单号：{OrderNo}", registration.OrderNo);
            }
            else
            {
                _logger.LogError("微信Native支付下单失败，订单号：{OrderNo}，错误：{Error}", registration.OrderNo, payResult.Message);
                throw Oops.Bah($"微信统一下单失败：{payResult.Message}");
            }
        }

        return output;
    }

    /// <summary>
    /// 处理线下支付
    /// </summary>
    private async Task<UnifiedPaymentOutput> HandleOfflinePaymentAsync(EventRegistration registration, UnifiedPaymentInput input)
    {
        if (string.IsNullOrEmpty(input.PaymentProofUrl))
        {
            throw Oops.Bah("线下支付需要上传付款凭证");
        }

        registration.PaymentProofUrl = input.PaymentProofUrl;
        registration.PaymentStatus = 0; // 待审核
        registration.UpdatedTime = DateTime.Now;
        registration.UpdatedUserId = input.OperatorUserId;
        await _registrationRepository.UpdateAsync(registration);

        _logger.LogInformation("线下支付提交审核，报名ID：{RegistrationId}，凭证URL：{ProofUrl}", 
            registration.Id, input.PaymentProofUrl);

        return new UnifiedPaymentOutput
        {
            RegistrationId = registration.Id,
            OrderNo = registration.OrderNo,
            PaymentStatus = 0, // 待审核
            IsFree = false
        };
    }

    /// <summary>
    /// 检查报名限制
    /// </summary>
    private async Task<RegistrationLimitCheckOutput> CheckRegistrationLimitAsync(UnifiedRegistrationInput input)
    {
        var result = new RegistrationLimitCheckOutput
        {
            HasLimit = false,
            LimitDetails = new List<RegistrationLimitDetail>()
        };

        var limit = await _limitRepository.GetFirstAsync(x => x.EventId == input.EventId && !x.DeleteMark);
        var projectLimits = await _projectLimitRepository.GetListAsync(x => x.EventId == input.EventId && !x.DeleteMark);
        var eventProjects = await _eventProjectRepository.GetListAsync(x => x.EventId == input.EventId);
        var projects = await _projectRepository.GetListAsync(x => eventProjects.Select(ep => ep.ProjectId).Contains(x.Id) && !x.DeleteMark);
        var eventProjectGroups = await _eventProjectGroupRepository.GetListAsync(x => x.EventId == input.EventId && !x.DeleteMark);

        // 1. 检查项目组别容量控制（团队报名数量限制）
        var groupIds = input.Items.Where(i => i.GroupId.HasValue).Select(i => i.GroupId.Value).ToList();
        if (groupIds.Any())
        {
            foreach (var groupId in groupIds)
            {
                var eventProjectGroup = eventProjectGroups.FirstOrDefault(epg => epg.Id == groupId);
                if (eventProjectGroup == null) continue;

                var eventProject = eventProjects.FirstOrDefault(ep => ep.Id == eventProjectGroup.EventProjectId);
                if (eventProject == null) continue;

                var projectLimit = projectLimits.FirstOrDefault(pl => pl.ProjectId == eventProject.ProjectId);
                if (projectLimit == null) continue;

                // 统计当前组别已报名的团队数量（排除草稿和已取消的）
                var registrationIds = await _registrationRepository.AsQueryable()
                    .Where(r => r.EventId == input.EventId && !r.DeleteMark && r.PaymentStatus != 4)
                    .Select(r => r.Id)
                    .ToListAsync();

                var currentTeams = await _registrationItemRepository.AsQueryable()
                    .Where(ri => ri.EventProjectGroupId == eventProjectGroup.Id 
                        && !ri.DeleteMark 
                        && registrationIds.Contains(ri.RegistrationId))
                    .Select(ri => ri.RegistrationId)
                    .Distinct()
                    .CountAsync();

                if (currentTeams >= projectLimit.LimitCount)
                {
                    var project = projects.FirstOrDefault(p => p.Id == eventProject.ProjectId);
                    var projectName = project?.Name ?? "未知项目";
                    
                    result.HasLimit = true;
                    result.LimitDetails.Add(new RegistrationLimitDetail
                    {
                        MemberId = 0,
                        MemberName = eventProjectGroup.GroupName ?? "未知组别",
                        LimitType = "ProjectGroupCapacity",
                        LimitMessage = $"项目\"{projectName}\"的组别\"{eventProjectGroup.GroupName}\"已报名{currentTeams}队，达到限报{projectLimit.LimitCount}队"
                    });
                }
            }
        }

        // 2. 检查个人/团队项目限报
        var memberIds = input.Items.SelectMany(i => i.Persons.Where(p => p.UserId.HasValue).Select(p => p.UserId.Value)).Distinct().ToList();
        if (limit != null && memberIds.Any())
        {
            var members = await _userRepository.GetListAsync(x => memberIds.Contains(x.Id) && !x.DeleteMark);
            var eventRegistrations = await _registrationRepository.GetListAsync(x => 
                x.EventId == input.EventId && x.PaymentStatus != 4 && !x.DeleteMark);
            var eventRegistrationIds = eventRegistrations.Select(r => r.Id).ToList();
            var registrationPersons = await _registrationPersonRepository.GetListAsync(x => 
                eventRegistrationIds.Contains(x.RegistrationId) && !x.DeleteMark);
            var allRegistrationItems = await _registrationItemRepository.GetListAsync(x => 
                eventRegistrationIds.Contains(x.RegistrationId) && !x.DeleteMark);

            foreach (var member in members)
            {
                var matchedPersons = registrationPersons.Where(x => x.IdCard == member.IdCardNumber && !string.IsNullOrEmpty(x.IdCard)).ToList();
                var personRegistrationIds = matchedPersons.Select(x => x.RegistrationId).Distinct().ToList();
                
                // 获取该队员已报名的所有项目项
                var personRegistrationItems = allRegistrationItems.Where(ri => personRegistrationIds.Contains(ri.RegistrationId)).ToList();
                
                // 统计个人项目和团队项目数量
                int individualProjectCount = 0;
                int teamProjectCount = 0;

                foreach (var item in personRegistrationItems)
                {
                    var eventProject = eventProjects.FirstOrDefault(ep => ep.Id == item.ProjectId);
                    if (eventProject == null) continue;

                    var baseProject = projects.FirstOrDefault(p => p.Id == eventProject.ProjectId);
                    if (baseProject == null) continue;

                    // 根据项目类型判断是个人项目还是团队项目
                    // 这里假设ProjectType中有个人和团队的区分，您可以根据实际情况调整
                    // 暂时根据报名模式统计
                    var registration = eventRegistrations.FirstOrDefault(r => r.Id == item.RegistrationId);
                    if (registration != null)
                    {
                        if (registration.RegistrationMode == 1) // 个人报名
                        {
                            individualProjectCount++;
                        }
                        else // 团队报名
                        {
                            teamProjectCount++;
                        }
                    }
                }

                // 检查个人项目限报
                if (individualProjectCount >= limit.IndividualProjectLimit)
                {
                    result.HasLimit = true;
                    result.LimitDetails.Add(new RegistrationLimitDetail
                    {
                        MemberId = member.Id,
                        MemberName = member.Name ?? member.NickName ?? "未知",
                        LimitType = "IndividualProjectLimit",
                        LimitMessage = $"队员{member.Name}已报名{individualProjectCount}个个人项目，达到个人项目限报{limit.IndividualProjectLimit}个"
                    });
                }

                // 检查团队项目限报
                if (teamProjectCount >= limit.TeamProjectLimit)
                {
                    result.HasLimit = true;
                    result.LimitDetails.Add(new RegistrationLimitDetail
                    {
                        MemberId = member.Id,
                        MemberName = member.Name ?? member.NickName ?? "未知",
                        LimitType = "TeamProjectLimit",
                        LimitMessage = $"队员{member.Name}已参与{teamProjectCount}个团队项目，达到团队项目限报{limit.TeamProjectLimit}个"
                    });
                }
            }
        }

        return result;
    }

    /// <summary>
    /// 获取组别名称
    /// </summary>
    private string GetGroupName(UnifiedRegistrationItemInput item, List<EventProjectGroup> eventProjectGroups)
    {
        if (!string.IsNullOrEmpty(item.GroupName))
        {
            return item.GroupName;
        }

        if (item.GroupId.HasValue)
        {
            var selectedGroup = eventProjectGroups.FirstOrDefault(eg => eg.Id == item.GroupId.Value);
            if (selectedGroup != null)
            {
                return selectedGroup.GroupName ?? "";
            }
        }

        var firstGroup = eventProjectGroups.FirstOrDefault(eg => eg.EventProjectId == item.ProjectId);
        return firstGroup?.GroupName ?? "";
    }

    /// <summary>
    /// 计算单个项目费用
    /// </summary>
    private (decimal unitPrice, decimal totalPrice) CalculateItemPrice(EventFeeConfig? feeConfig, EventProject eventProject, int personCount)
    {
        decimal unitPrice = 0;
        decimal totalPrice = 0;

        if (feeConfig == null)
        {
            return (0, 0);
        }

        switch (feeConfig.ChargeMode)
        {
            case ChargeMode.Free:
                unitPrice = 0;
                totalPrice = 0;
                break;
            case ChargeMode.FixedPrice:
                unitPrice = feeConfig.Price;
                totalPrice = unitPrice * personCount;
                break;
            case ChargeMode.UnitPriceEvent:
                unitPrice = feeConfig.Price;
                totalPrice = unitPrice * personCount;
                break;
            case ChargeMode.UnitPriceProject:
                unitPrice = eventProject.Price / 100m;
                totalPrice = unitPrice * personCount;
                break;
        }

        return (unitPrice, totalPrice);
    }

    /// <summary>
    /// 计算总费用
    /// </summary>
    private decimal CalculateTotalAmount(EventFeeConfig? feeConfig, List<EventProject> eventProjects, 
        List<UnifiedRegistrationItemInput> items, int totalPersonCount)
    {
        if (feeConfig == null)
        {
            return 0;
        }

        var pricingInput = new PricingInput
        {
            ChargeMode = feeConfig.ChargeMode,
            ParticipantCount = totalPersonCount,
            EventPrice = feeConfig.Price
        };

        foreach (var item in items)
        {
            var ep = eventProjects.FirstOrDefault(p => p.Id == item.ProjectId);
            if (ep != null)
            {
                pricingInput.Projects.Add(new ProjectPricingInfo
                {
                    ProjectId = ep.Id,
                    UnitPrice = ep.Price
                });
            }
        }

        var pricingResult = EventPricingService.Calculate(pricingInput);
        return pricingResult.TotalAmount;
    }

    /// <summary>
    /// 根据出生日期计算年龄
    /// </summary>
    private static int CalculateAge(DateTime birthDate)
    {
        var today = DateTime.Today;
        var age = today.Year - birthDate.Year;
        if (birthDate.Date > today.AddYears(-age)) age--;
        return age;
    }

    /// <summary>
    /// 处理支付成功
    /// </summary>
    public async Task HandlePaymentSuccessAsync(string orderNo, string transactionId, DateTime? successTime, long operatorUserId)
    {
        var reg = await _registrationRepository.GetFirstAsync(r => r.OrderNo == orderNo);
        if (reg == null)
        {
            _logger.LogWarning($"未找到订单：{orderNo}");
            return;
        }

        if (reg.PaymentStatus == 1)
        {
            _logger.LogInformation($"订单 {reg.OrderNo} 已处理过支付");
            return;
        }

        var evt = await _eventRepository.GetFirstAsync(e => e.Id == reg.EventId);
        if (evt == null)
        {
            _logger.LogError($"未找到赛事信息，订单号：{reg.OrderNo}，赛事ID：{reg.EventId}");
            return;
        }

        _logger.LogInformation("订单支付成功，订单号={OrderNo}，赛事ID={EventId}，商户ID={MerchantId}", 
            reg.OrderNo, evt.Id, evt.MerchantId);

        reg.PaymentStatus = 1;
        reg.PaymentTime = successTime;
        reg.RegistrationRemark = transactionId;
        reg.UpdatedTime = DateTime.Now;
        reg.UpdatedUserId = operatorUserId;

        await _registrationRepository.UpdateAsync(reg);
        _logger.LogInformation($"订单 {reg.OrderNo} 支付成功，微信交易号：{transactionId}");

        var payment = new EventRegistrationPayment
        {
            Id = _idGenerator.NewLong(),
            RegistrationId = reg.Id,
            TransactionNo = transactionId ?? "",
            PaymentChannel = 1,
            PaymentAmount = reg.TotalAmount,
            PaymentTime = successTime ?? DateTime.Now,
            PaymentStatus = 1,
            RefundStatus = 0,
            PayeeAccount = "",
            CreatedUserId = reg.CreatedUserId,
            CreatedTime = DateTime.Now
        };
        await _paymentRepository.InsertAsync(payment);
        _logger.LogInformation($"支付记录创建成功，报名ID={reg.Id}，交易号={transactionId}");

        var order = await _orderRepository.GetFirstAsync(o => o.OrderNo == reg.OrderNo);
        if (order != null)
        {
            order.OrderStatus = OrderStatus.Paid;
            order.PaymentTime = successTime;
            order.UpdatedTime = DateTime.Now;
            await _orderRepository.UpdateAsync(order);
            _logger.LogInformation($"Order 记录 {order.OrderNo} 状态已更新为已支付");
        }
    }

    /// <summary>
    /// 取消报名
    /// </summary>
    public async Task<bool> CancelRegistrationAsync(long registrationId, long operatorUserId)
    {
        var reg = await _registrationRepository.GetFirstAsync(r => r.Id == registrationId && r.CreatedUserId == operatorUserId);
        if (reg == null) throw Oops.Bah("报名记录不存在");

        if (reg.PaymentStatus == 1) throw Oops.Bah("已支付订单请联系客服退款");
        if (reg.PaymentStatus == 4) throw Oops.Bah("订单已取消，无需重复操作");

        _logger.LogInformation("开始取消报名：报名ID={RegistrationId}, 操作人={UserId}, 当前状态={PaymentStatus}", 
            registrationId, operatorUserId, reg.PaymentStatus);

        reg.PaymentStatus = 4;
        reg.UpdatedTime = DateTime.Now;
        reg.UpdatedUserId = operatorUserId;
        await _registrationRepository.UpdateAsync(reg);

        if (!string.IsNullOrEmpty(reg.OrderNo))
        {
            var order = await _orderRepository.GetFirstAsync(o => o.OrderNo == reg.OrderNo);
            if (order != null)
            {
                order.OrderStatus = OrderStatus.Cancelled;
                order.UpdatedTime = DateTime.Now;
                order.UpdatedUserId = operatorUserId;
                await _orderRepository.UpdateAsync(order);
                _logger.LogInformation("订单状态已同步更新：订单号={OrderNo}, 状态={OrderStatus}", 
                    reg.OrderNo, OrderStatus.Cancelled);
            }
            else
            {
                _logger.LogWarning("未找到对应的订单记录：报名ID={RegistrationId}, 订单号={OrderNo}", 
                    registrationId, reg.OrderNo);
            }
        }

        _logger.LogInformation("取消报名成功：报名ID={RegistrationId}", registrationId);
        return true;
    }

    /// <summary>
    /// 查询并同步微信支付状态
    /// </summary>
    public async Task<bool> QueryAndSyncWeChatPaymentStatusAsync(long registrationId, long operatorUserId)
    {
        var reg = await _registrationRepository.GetFirstAsync(r => r.Id == registrationId && r.CreatedUserId == operatorUserId);
        if (reg == null) throw Oops.Bah("报名记录不存在");

        if (reg.PaymentStatus == 1) return true;

        var evt = await _eventRepository.GetFirstAsync(e => e.Id == reg.EventId);
        if (evt == null) throw Oops.Bah("赛事不存在");

        WeChatPayConfig? payConfig = null;
        if (evt.MerchantId.HasValue)
        {
            payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
                x.MerchantId == evt.MerchantId.Value && 
                x.Status == AvailabilityStatus.Enable && 
                !x.DeleteMark);
        }

        if (payConfig == null)
        {
            payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
                x.Status == AvailabilityStatus.Enable && !x.DeleteMark);
        }

        if (payConfig == null)
        {
            _logger.LogError("未找到可用的微信支付配置，赛事ID={EventId}，商户ID={MerchantId}", evt.Id, evt.MerchantId);
            throw Oops.Bah("未找到可用的微信支付配置，请联系赛事管理员");
        }

        var queryResult = await _weChatPayService.QueryOrderAsync(payConfig, reg.OrderNo);
        if (queryResult.Success && queryResult.TradeState == "SUCCESS")
        {
            await HandlePaymentSuccessAsync(reg.OrderNo, queryResult.TransactionId, queryResult.SuccessTime?.DateTime, operatorUserId);
            return true;
        }

        return false;
    }

    /// <summary>
    /// 获取平台级别的微信支付配置
    /// </summary>
    public async Task<WeChatPayConfig?> GetPlatformWeChatPayConfigAsync()
    {
        return await _weChatPayConfigRepository.GetFirstAsync(x => 
            x.Status == AvailabilityStatus.Enable && !x.DeleteMark);
    }

    /// <summary>
    /// 根据赛事获取对应的微信支付配置
    /// </summary>
    public async Task<WeChatPayConfig?> GetWeChatPayConfigByEventAsync(EventInfo evt)
    {
        WeChatPayConfig? payConfig = null;
        if (evt.MerchantId.HasValue)
        {
            payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
                x.MerchantId == evt.MerchantId.Value && 
                x.Status == AvailabilityStatus.Enable && 
                !x.DeleteMark);
        }

        if (payConfig == null)
        {
            payConfig = await GetPlatformWeChatPayConfigAsync();
        }

        return payConfig;
    }
}