using YD_Event.Application.AppUser.Dtos;
using YD_Event.Application.Auth;
using YD_Event.Core.Entities;
using AppUserEntity = YD_Event.Core.Entities.AppUser;
using YD_Event.Core.Enum;
using Mapster;
using EasyCaching.Core;

namespace YD_Event.Application.AppUser;

/// <summary>
/// 普通用户服务
/// </summary>
public class AppUserService : BaseService<AppUserEntity>, ITransient
{
    private readonly ISqlSugarRepository<AppUserEntity> _appUserRep;
    private readonly ISqlSugarClient _db;
    private readonly AuthManager _authManager;
    private readonly IEasyCachingProvider _cachingProvider;

    public AppUserService(ISqlSugarRepository<AppUserEntity> appUserRep, 
        ISqlSugarClient db,
        AuthManager authManager,
        IEasyCachingProvider cachingProvider) : base(appUserRep)
    {
        _appUserRep = appUserRep;
        _db = db;
        _authManager = authManager;
        _cachingProvider = cachingProvider;
    }

    /// <summary>
    /// 分页查询普通用户
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [DisplayName("分页查询普通用户")]
    [HttpGet("page")]
    public async Task<PageResult<AppUserOutput>> Page([FromQuery] AppUserPageInput input)
    {
        var query = _appUserRep.AsQueryable()
            .WhereIF(!string.IsNullOrWhiteSpace(input.Name), u => u.Name.Contains(input.Name))
            .WhereIF(input.Gender.HasValue, u => u.Gender == input.Gender)
            .WhereIF(!string.IsNullOrWhiteSpace(input.Mobile), u => u.Mobile.Contains(input.Mobile))
            .WhereIF(input.AuditStatus.HasValue, u => u.AuditStatus == input.AuditStatus)
            .WhereIF(input.StartTime.HasValue, u => u.CreatedTime >= input.StartTime)
            .WhereIF(input.EndTime.HasValue, u => u.CreatedTime <= input.EndTime)
            .OrderByDescending(u => u.CreatedTime);

        return await query.Select<AppUserOutput>().ToPagedListAsync(input);
    }

    /// <summary>
    /// 获取普通用户详情
    /// </summary>
    /// <param name="id"></param>
    /// <returns></returns>
    [DisplayName("获取普通用户详情")]
    [HttpGet("{id}")]
    public async Task<AppUserOutput> Detail([FromRoute] long id)
    {
        return await _appUserRep.AsQueryable()
            .Where(u => u.Id == id)
            .Select<AppUserOutput>()
            .FirstAsync();
    }

    /// <summary>
    /// 审核普通用户
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [DisplayName("审核普通用户")]
    [HttpPost("audit")]
    [UnitOfWork]
    public async Task Audit([FromBody] AuditInput input)
    {
        if (input.Ids == null || !input.Ids.Any()) return;

        // 更新状态
        await _appUserRep.UpdateAsync(u => new AppUserEntity 
        { 
            AuditStatus = input.Status, 
            AuditRemark = input.Remark,
            UpdatedTime = DateTime.Now,
            UpdatedUserId = _authManager.UserId
        }, u => input.Ids.Contains(u.Id));
    }

    #region 统一成员管理 (领队/教练/运动员)

    /// <summary>
    /// 统一分页查询成员
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [HttpGet("member/page")]
    [DisplayName("统一分页查询成员")]
    public async Task<PageResult<MemberOutput>> MemberPage([FromQuery] MemberQueryInput input)
    {
        var (userId, merchantCertificationId) = await GetCurrentUserAndMerchantCertificationId();

        var query = _appUserRep.AsQueryable()
            .Where(x => x.PersonType == input.PersonType && !x.DeleteMark)
            .WhereIF(!string.IsNullOrWhiteSpace(input.Name), x => x.Name.Contains(input.Name))
            .WhereIF(input.Gender.HasValue, x => x.Gender == input.Gender)
            .WhereIF(!string.IsNullOrWhiteSpace(input.Mobile), x => x.Mobile.Contains(input.Mobile))
            .WhereIF(!string.IsNullOrWhiteSpace(input.IdCardNumber), u => u.IdCardNumber.Contains(input.IdCardNumber))
            .WhereIF(input.PersonType == PersonType.Coach && !string.IsNullOrWhiteSpace(input.SkillLevel), x => x.SkillLevel == input.SkillLevel)
            .WhereIF(input.PersonType == PersonType.Coach && input.CertificationStatus.HasValue, x => x.CertificationStatus == input.CertificationStatus)
            .WhereIF(input.StartTime.HasValue, u => u.CreatedTime >= input.StartTime)
            .WhereIF(input.EndTime.HasValue, u => u.CreatedTime <= input.EndTime)
            .OrderByDescending(x => x.CreatedTime);

        // 权限过滤 (管理员可看全部，这里简化的商户隔离逻辑)
        if (merchantCertificationId.HasValue)
        {
            query = query.Where(x => x.MerchantCertificationId == merchantCertificationId.Value);
        }
        else
        {
            // 这里根据实际业务，如果普通用户只能看自己创建的，需要这个过滤
            query = query.Where(x => x.CreatedUserId == userId && x.MerchantCertificationId == null);
        }

        var list = await query.ToPagedListAsync(input);
        var result = list.Adapt<PageResult<MemberOutput>>();
        
        // 设置Age字段：优先使用数据库中的Age，如果没有则根据BirthDate计算
        foreach (var item in result.Rows)
        {
            if (item.Age.HasValue)
            {
                // 数据库中已有Age，直接使用
                continue;
            }
            // 数据库中没有Age，根据BirthDate动态计算
            if (item.BirthDate.HasValue)
            {
                item.Age = MemberOutput.CalculateAgeFromBirthDate(item.BirthDate);
            }
        }
        
        return result;
    }

    /// <summary>
    /// 统一新增/编辑成员
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [HttpPost("member/save")]
    [DisplayName("统一新增/编辑成员")]
    [UnitOfWork]
    public async Task SaveUnifiedMember(CreateOrUpdateMemberInput input)
    {
        var (userId, merchantCertificationId) = await GetCurrentUserAndMerchantCertificationId();

        // 检查是否有跨单位操作权限
        if (!merchantCertificationId.HasValue)
        {
            throw Oops.Bah("当前用户未关联单位，无法进行操作");
        }

        // 先检查是否存在相同手机号且相同类型的运动员在其他单位
        var existingInOtherUnit = await _appUserRep.AsQueryable()
            .Where(x => x.Mobile == input.Mobile 
                && x.PersonType == input.PersonType 
                && x.MerchantCertificationId != merchantCertificationId 
                && x.MerchantCertificationId != null
                && !x.DeleteMark)
            .FirstAsync();

        AppUserEntity? entity = null;
        bool isUnitTransfer = false;
        bool isNewRecord = false;
        long? originalMerchantId = null;

        if (existingInOtherUnit != null)
        {
            // 单位更换流程
            isUnitTransfer = true;
            entity = existingInOtherUnit;
            originalMerchantId = entity.MerchantCertificationId;
        }
        else
        {
            // 检查是否存在相同手机号但还未加入任何单位的记录（小程序注册的用户）
            var existingWithoutUnit = await _appUserRep.AsQueryable()
                .Where(x => x.Mobile == input.Mobile 
                    && x.PersonType == input.PersonType 
                    && x.MerchantCertificationId == null 
                    && !x.DeleteMark)
                .FirstAsync();
                
            if (existingWithoutUnit != null)
            {
                // 找到已存在但未加入任何单位的记录，复用该记录
                entity = existingWithoutUnit;
                entity.UpdatedUserId = _authManager.UserId;
                entity.UpdatedTime = DateTime.Now;
            }
            else
            {
                // 没有找到任何记录，标记为新增
                isNewRecord = true;
            }
        }

        if (input.Id.HasValue)
        {
            // 编辑模式
            entity = await _appUserRep.GetByIdAsync(input.Id.Value);
            if (entity == null || entity.DeleteMark) throw Oops.Bah("成员不存在");
            
            // 检查手机号是否被本单位内同类型的其他记录占用
            var duplicateInSameUnit = await _appUserRep.AsQueryable()
                .Where(x => x.Mobile == input.Mobile 
                    && x.PersonType == input.PersonType 
                    && x.MerchantCertificationId == merchantCertificationId 
                    && !x.DeleteMark 
                    && x.Id != input.Id.Value)
                .FirstAsync();
            
            if (duplicateInSameUnit != null)
            {
                throw Oops.Bah($"该手机号在本单位已存在相同类型的成员");
            }

            entity.UpdatedUserId = _authManager.UserId;
            entity.UpdatedTime = DateTime.Now;
        }
        else if (isNewRecord)
        {
            // 新增模式：检查本单位内是否有相同手机号且相同类型的记录
            var existingInSameUnit = await _appUserRep.AsQueryable()
                .Where(x => x.Mobile == input.Mobile 
                    && x.PersonType == input.PersonType 
                    && x.MerchantCertificationId == merchantCertificationId 
                    && !x.DeleteMark)
                .FirstAsync();

            if (existingInSameUnit != null)
            {
                // 本单位内已有相同手机号且相同类型的记录，不允许重复添加
                throw Oops.Bah($"该手机号在本单位已存在相同类型的成员");
            }

            // 新增记录
            entity = new AppUserEntity
            {
                Id = YitIdHelper.NextId(),
                PersonType = input.PersonType,
                MerchantCertificationId = merchantCertificationId,
                CreatedUserId = userId,
                CreatedTime = DateTime.Now,
                Status = AvailabilityStatus.Enable,
                AuditStatus = AuditStatus.PendingSubmission
            };

            // 仅在真正新增运动员时验证验证码
            if (input.PersonType == PersonType.Athlete)
            {
                if (string.IsNullOrWhiteSpace(input.VerificationCode))
                {
                    throw Oops.Bah("验证码不能为空");
                }

                var cacheKey = $"sms:code:{input.Mobile}";
                var cachedCodeResult = _cachingProvider.Get<string>(cacheKey);
                string? cachedCode = cachedCodeResult.Value;
                if (!cachedCodeResult.HasValue || cachedCode != input.VerificationCode)
                {
                    throw Oops.Bah("验证码错误或已过期");
                }
            }

            if (isUnitTransfer)
            {
                existingInOtherUnit.DeleteMark = true;
                await _appUserRep.UpdateAsync(existingInOtherUnit);
            }
        }

        // 更新用户信息字段
        entity.Name = input.Name;
        entity.Gender = input.Gender;
        entity.IdCardNumber = input.IdCardNumber;
        entity.IdCardImageUrl = input.IdCardImageUrl;
        entity.PassportPhotoUrl = input.PassportPhotoUrl;
        entity.Mobile = input.Mobile;
        entity.Remark = input.Remark;
        entity.AuditRemark = isUnitTransfer ? "单位更换" : "";
        entity.BirthDate = input.BirthDate;
        entity.Age = input.Age;
        
        // 更新认证单位信息
        var oldMerchantId = entity.MerchantCertificationId;
        if (entity.MerchantCertificationId != merchantCertificationId)
        {
            entity.MerchantCertificationId = merchantCertificationId;
            entity.UpdatedUserId = _authManager.UserId;
            entity.UpdatedTime = DateTime.Now;
        }
        
        if (input.PersonType == PersonType.Coach)
        {
            entity.SkillLevel = input.SkillLevel;
            entity.CertificationStatus = input.CertificationStatus;
        }

        // 保存用户信息
        await _appUserRep.InsertOrUpdateAsync(entity);

        // 如果是单位更换，处理团队关系
        if (isUnitTransfer && oldMerchantId.HasValue)
        {
            await HandleTeamTransfer(entity.Id, oldMerchantId.Value, merchantCertificationId.Value);
        }
    }

    /// <summary>
    /// 处理单位更换时的团队成员关系
    /// </summary>
    /// <param name="userId">用户ID</param>
    /// <param name="oldMerchantId">原单位ID</param>
    /// <param name="newMerchantId">新单位ID</param>
    /// <returns></returns>
    private async Task HandleTeamTransfer(long userId, long oldMerchantId, long newMerchantId)
    {
        // 从原单位的所有团队中移除该成员
        var oldTeamIds = await _db.Queryable<YD_Event.Core.Entities.Team>()
            .Where(t => t.MerchantCertificationId == oldMerchantId && !t.DeleteMark)
            .Select(t => t.Id)
            .ToListAsync();

        if (oldTeamIds.Any())
        {
            await _db.Updateable<TeamMember>()
                .SetColumns(tm => new TeamMember 
                { 
                    DeleteMark = true, 
                    UpdatedTime = DateTime.Now,
                    UpdatedUserId = _authManager.UserId
                })
                .Where(tm => tm.UserId == userId 
                    && oldTeamIds.Contains(tm.TeamId) 
                    && !tm.DeleteMark)
                .ExecuteCommandAsync();
        }
    }

    #endregion

    #region 领队/教练管理 (向下兼容)

    private async Task<(long userId, long? merchantCertificationId)> GetCurrentUserAndMerchantCertificationId()
    {
        var userId = _authManager.UserId;
        
        // 直接查询单位认证表，检查是否有审核通过的认证记录
        var certification = await _db.Queryable<MerchantCertification>()
            .FirstAsync(c => c.UserId == userId && !c.DeleteMark);
        
        // 有审核通过的认证就返回认证ID，否则返回null
        return (userId, certification?.Id);
    }

    private async Task CheckPermission(AppUserEntity entity)
    {
        var (userId, merchantCertificationId) = await GetCurrentUserAndMerchantCertificationId();
        
        if (merchantCertificationId.HasValue)
        {
            if (entity.MerchantCertificationId != merchantCertificationId.Value) throw Oops.Bah("无权操作该成员");
        }
        else
        {
            if (entity.CreatedUserId != userId || entity.MerchantCertificationId != null) throw Oops.Bah("无权操作该成员");
        }
    }

    /// <summary>
    /// 删除成员（解除与单位的关联，而非删除用户）
    /// </summary>
    /// <param name="id"></param>
    /// <returns></returns>
    [DisplayName("删除成员")]
    [HttpPost("member/delete")]
    [UnitOfWork]
    public async Task DeleteMember([FromBody] long id)
    {
        var entity = await _appUserRep.GetByIdAsync(id);
        if (entity == null || entity.DeleteMark) throw Oops.Bah("成员不存在");
        
        await CheckPermission(entity);

        // 1. 先保存原来的 MerchantCertificationId 用于后续处理
        var originalMerchantId = entity.MerchantCertificationId;
        
        // 2. 解除用户与单位的关联
        entity.MerchantCertificationId = null;
        entity.UpdatedUserId = _authManager.UserId;
        entity.UpdatedTime = DateTime.Now;
        await _appUserRep.UpdateAsync(entity);
        
        // 3. 如果原来有关联单位，需要从该单位的所有团队中移除该成员
        if (originalMerchantId.HasValue)
        {
            // 查找该单位的所有团队
            var teamIds = await _db.Queryable<YD_Event.Core.Entities.Team>()
                .Where(t => t.MerchantCertificationId == originalMerchantId.Value && !t.DeleteMark)
                .Select(t => t.Id)
                .ToListAsync();

            if (teamIds.Any())
            {
                // 从所有相关团队中移除该成员
                await _db.Updateable<TeamMember>()
                    .SetColumns(tm => new TeamMember 
                    { 
                        DeleteMark = true, 
                        UpdatedTime = DateTime.Now,
                        UpdatedUserId = _authManager.UserId
                    })
                    .Where(tm => tm.UserId == id 
                        && teamIds.Contains(tm.TeamId) 
                        && !tm.DeleteMark)
                    .ExecuteCommandAsync();
            }
        }
    }

    /// <summary>
    /// 批量删除成员（解除与单位的关联，而非删除用户）
    /// </summary>
    /// <param name="ids"></param>
    /// <returns></returns>
    [HttpPost("member/batchDelete")]
    [DisplayName("批量删除成员")]
    [UnitOfWork]
    public async Task BatchDeleteMember([FromBody] List<long> ids)
    {
        if (ids == null || !ids.Any()) throw Oops.Bah("请选择要删除的记录");

        // 获取当前用户的单位ID
        var (_, merchantCertificationId) = await GetCurrentUserAndMerchantCertificationId();
        
        // 1. 解除所有选中用户与当前单位的关联
        await _appUserRep.UpdateAsync(x => new AppUserEntity 
        { 
            MerchantCertificationId = null,
            UpdatedUserId = _authManager.UserId,
            UpdatedTime = DateTime.Now 
        }, x => ids.Contains(x.Id));
        
        // 2. 如果有单位ID，从该单位的所有团队中移除这些成员
        if (merchantCertificationId.HasValue)
        {
            // 查找该单位的所有团队
            var teamIds = await _db.Queryable<YD_Event.Core.Entities.Team>()
                .Where(t => t.MerchantCertificationId == merchantCertificationId.Value && !t.DeleteMark)
                .Select(t => t.Id)
                .ToListAsync();

            if (teamIds.Any())
            {
                // 从所有相关团队中移除这些成员
                await _db.Updateable<TeamMember>()
                    .SetColumns(tm => new TeamMember 
                    { 
                        DeleteMark = true, 
                        UpdatedTime = DateTime.Now,
                        UpdatedUserId = _authManager.UserId
                    })
                    .Where(tm => ids.Contains(tm.UserId) 
                        && teamIds.Contains(tm.TeamId) 
                        && !tm.DeleteMark)
                    .ExecuteCommandAsync();
            }
        }
    }

    /// <summary>
    /// 变更成员状态
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [DisplayName("变更成员状态")]
    [HttpPost("member/status")]
    public async Task ChangeMemberStatus(ChangeMemberStatusInput input)
    {
        var entity = await _appUserRep.GetByIdAsync(input.Id);
        if (entity == null || entity.DeleteMark) throw Oops.Bah("成员不存在");
        
        await CheckPermission(entity);

        entity.Status = input.Status;
        entity.UpdatedUserId = _authManager.UserId;
        entity.UpdatedTime = DateTime.Now;

        await _appUserRep.UpdateAsync(entity);
    }

    #endregion
}