using SqlSugar;
using YD_Event.Application.Auth;
using YD_Event.Application.Points.Dtos;
using YD_Event.Core.Entities;
using YD_Event.Core.Enum;

namespace YD_Event.Application.Points;

/// <summary>
/// 积分记录管理
/// </summary>
public class PointsRecordService : BaseService<PointsRecord>, ITransient
{
    private readonly ISqlSugarRepository<PointsRecord> _repository;
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.AppUser> _appUserRepository;
    private readonly ISqlSugarRepository<PointsRule> _pointsRuleRepository;
    private readonly ISqlSugarClient _db;
    private readonly AuthManager _authManager;
    
    public PointsRecordService(
        ISqlSugarRepository<PointsRecord> repository,
        ISqlSugarRepository<YD_Event.Core.Entities.AppUser> appUserRepository,
        ISqlSugarRepository<PointsRule> pointsRuleRepository,
        ISqlSugarClient db,
        AuthManager authManager) : base(repository)
    {
        _repository = repository;
        _appUserRepository = appUserRepository;
        _pointsRuleRepository = pointsRuleRepository;
        _db = db;
        _authManager = authManager;
    }

    /// <summary>
    /// 获取用户当前积分余额 (PC用户)
    /// </summary>
    /// <returns></returns>
    [DisplayName("获取用户当前积分余额")]
    [HttpGet("balance")]
    public async Task<UserPointsOverviewDto> GetBalance()
    {
        var userId = _authManager.UserId;
        var certification = await _db.Queryable<MerchantCertification>()
            .FirstAsync(c => c.UserId == userId && c.AuditStatus == AuditStatus.Pass && !c.DeleteMark);

        decimal balance;
        if (certification != null)
        {
            // 单位认证用户：查询单位认证ID的积分
            balance = await _repository.AsQueryable()
                .Where(x => x.MerchantCertificationId == certification.Id)
                .SumAsync(x => x.Points);
        }
        else
        {
            // 个人用户：查询个人积分
            balance = await _repository.AsQueryable()
                .Where(x => x.UserId == userId && x.MerchantCertificationId == null)
                .SumAsync(x => x.Points);
        }

        return new UserPointsOverviewDto { CurrentBalance = balance };
    }

    /// <summary>
    /// 查询积分明细列表 (PC用户)
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [DisplayName("查询积分明细列表")]
    [HttpGet("logs")]
    public async Task<PageResult<UserPointsLogDto>> GetLogs([FromQuery] UserPointsQueryInput input)
    {
        var userId = _authManager.UserId;
        var certification = await _db.Queryable<MerchantCertification>()
            .FirstAsync(c => c.UserId == userId && c.AuditStatus == AuditStatus.Pass && !c.DeleteMark);

        var query = _repository.AsQueryable()
            .LeftJoin<EventInfo>((pr, e) => pr.EventId == e.Id)
            .LeftJoin<YD_Event.Core.Entities.Project>((pr, e, p) => pr.ProjectId == p.Id)
            .LeftJoin<ProjectGroup>((pr, e, p, pg) => pr.ProjectGroupId == pg.Id)
            .LeftJoin<YD_Event.Core.Entities.AppUser>((pr, e, p, pg, u) => pr.UserId == u.Id)
            .WhereIF(input.Type.HasValue, pr => pr.Type == input.Type)
            .WhereIF(!string.IsNullOrWhiteSpace(input.ActionKeyword), (pr, e) => e.EventName.Contains(input.ActionKeyword) || pr.Remark.Contains(input.ActionKeyword))
            .WhereIF(input.StartTime.HasValue, pr => pr.CreatedTime >= input.StartTime)
            .WhereIF(input.EndTime.HasValue, pr => pr.CreatedTime <= input.EndTime)
            .OrderByDescending(pr => pr.CreatedTime);

        if (certification != null)
        {
            // 单位认证用户：查询单位认证ID的积分记录
            query = query.Where(pr => pr.MerchantCertificationId == certification.Id);
        }
        else
        {
            // 个人查询：按 UserId 过滤，且排除单位认证记录
            query = query.Where(pr => pr.UserId == userId && pr.MerchantCertificationId == null);
        }

        var result = await query.Select((pr, e, p, pg, u) => new UserPointsLogDto
            {
                Id = pr.Id,
                Type = pr.Type,
                Action = e.EventName ?? pr.Remark ?? "未知动作",
                ProjectName = p.Name,
                GroupName = pg.GroupName,
                ParticipantName = u.Name, // 显示关联用户的姓名
                Rank = 0, // 暂无法直接关联到名次，需业务侧在写入PointsRecord时记录
                Points = pr.Points,
                CreatedTime = pr.CreatedTime
            })
            .ToPagedListAsync(input);

        return result;
    }

    /// <summary>
    /// 积分规则说明接口 (PC用户)
    /// </summary>
    /// <returns></returns>
    [DisplayName("积分规则说明接口")]
    [HttpGet("rules")]
    [AllowAnonymous] 
    public async Task<List<PointsRule>> GetRules()
    {
        // 返回所有启用的积分规则
        return await _pointsRuleRepository.AsQueryable()
            .Where(x => x.Status == AvailabilityStatus.Enable)
            .Includes(x => x.Details) // 包含明细
            .OrderBy(x => x.CreatedTime)
            .ToListAsync();
    }

    /// <summary>
    /// 积分记录分页查询
    /// </summary>
    [DisplayName("积分记录分页查询")]
    [HttpGet("list")]
    public async Task<PageResult<PointsRecordListOutput>> List([FromQuery] PointsRecordQueryInput input)
    {
        if (input.UserType == 0) // 普通用户
        {
            var query = _appUserRepository.AsQueryable()
                .WhereIF(!string.IsNullOrWhiteSpace(input.Keyword), u => 
                    u.Name.Contains(input.Keyword) || 
                    u.Mobile.Contains(input.Keyword));
            
            // 关联查询积分
            // 注意：这里需要根据时间范围筛选积分记录，还是筛选最后有积分变动的用户？
            // 需求：时间范围筛选。通常指筛选在该时间范围内有积分变动的记录，或者只统计该时间范围内的积分。
            // 但“积分额度”通常指总积分。
            // 如果时间范围筛选是指“只看某段时间的积分情况”，那么积分额度应该是该段时间内的总和。
            // 如果是指“筛选某段时间有活动的用户”，积分额度可能是总积分。
            // 考虑到“积分额度排序”，通常是总积分。
            // 让我们假设：时间范围筛选是指筛选在该时间范围内有积分变动的用户，积分额度为当前总积分。
            // 或者：积分额度 = 该时间范围内的积分总和。
            // 根据管理后台惯例，如果有时间筛选，通常列表显示的是该时间段的数据统计。
            // 让我们采用：积分额度 = 该时间范围内的积分总和（如果没有时间筛选，就是所有时间）。
            
            // 使用子查询或 LeftJoin 计算积分
            var result = await query
                .Select(u => new PointsRecordListOutput
                {
                    UserId = u.Id,
                    UserType = 0,
                    Name = u.Name,
                    Phone = u.Mobile,
                    IdentityInfo = u.IdCardImageUrl, // 身份证图片
                    TotalPoints = SqlFunc.Subqueryable<PointsRecord>()
                        .Where(p => p.UserId == u.Id && !p.DeleteMark)
                        .WhereIF(input.StartTime.HasValue, p => p.CreatedTime >= input.StartTime)
                        .WhereIF(input.EndTime.HasValue, p => p.CreatedTime <= input.EndTime)
                        .Sum(p => p.Points), // 实时计算
                    LastUpdateTime = SqlFunc.Subqueryable<PointsRecord>()
                        .Where(p => p.UserId == u.Id && !p.DeleteMark)
                        .WhereIF(input.StartTime.HasValue, p => p.CreatedTime >= input.StartTime)
                        .WhereIF(input.EndTime.HasValue, p => p.CreatedTime <= input.EndTime)
                        .Max(p => p.CreatedTime)
                })
                .MergeTable() // 将上面的 Select 结果作为临时表，以便进行后续的 Where 和 OrderBy
                .WhereIF(input.StartTime.HasValue || input.EndTime.HasValue, x => x.LastUpdateTime != null) // 如果有时间筛选，只显示有记录的用户
                .OrderByIF(!string.IsNullOrWhiteSpace(input.SortPoints), x => x.TotalPoints, input.SortPoints == "asc" ? OrderByType.Asc : OrderByType.Desc)
                .OrderByDescending(x => x.LastUpdateTime) // 默认按更新时间倒序
                .ToPagedListAsync(input);

            return result;
        }
        else // 单位用户
        {
            // 单位用户：查询SysUser，关联MerchantCertification
            var query = _db.Queryable<SysUser>()
                .InnerJoin<MerchantCertification>((s, m) => s.Id == m.UserId && !m.DeleteMark)
                .Where((s, m) => !s.DeleteMark)
                .WhereIF(!string.IsNullOrWhiteSpace(input.Keyword), (s, m) => 
                    s.Name.Contains(input.Keyword) || 
                    m.MerchantName.Contains(input.Keyword) ||
                    m.ContactPhone.Contains(input.Keyword));

            var result = await query
                .Select((s, m) => new PointsRecordListOutput
                {
                    UserId = m.Id, // 使用MerchantCertificationId作为标识
                    UserType = 1,
                    Name = m.MerchantName, // 显示单位名称
                    Phone = m.ContactPhone,
                    IdentityInfo = m.CreditCode, // 统一社会信用代码
                    TotalPoints = SqlFunc.Subqueryable<PointsRecord>()
                        .Where(p => p.MerchantCertificationId == m.Id && !p.DeleteMark)
                        .WhereIF(input.StartTime.HasValue, p => p.CreatedTime >= input.StartTime)
                        .WhereIF(input.EndTime.HasValue, p => p.CreatedTime <= input.EndTime)
                        .Sum(p => p.Points),
                    LastUpdateTime = SqlFunc.Subqueryable<PointsRecord>()
                        .Where(p => p.MerchantCertificationId == m.Id && !p.DeleteMark)
                        .WhereIF(input.StartTime.HasValue, p => p.CreatedTime >= input.StartTime)
                        .WhereIF(input.EndTime.HasValue, p => p.CreatedTime <= input.EndTime)
                        .Max(p => p.CreatedTime)
                })
                .MergeTable()
                .WhereIF(input.StartTime.HasValue || input.EndTime.HasValue, x => x.LastUpdateTime != null)
                .OrderByIF(!string.IsNullOrWhiteSpace(input.SortPoints), x => x.TotalPoints, input.SortPoints == "asc" ? OrderByType.Asc : OrderByType.Desc)
                .OrderByDescending(x => x.LastUpdateTime)
                .ToPagedListAsync(input);

            return result;
        }
    }

    /// <summary>
    /// 积分明细查询
    /// </summary>
    [DisplayName("积分明细查询")]
    [HttpGet("detail/{userId}")]
    public async Task<PageResult<PointsDetailOutput>> Detail([FromQuery] PointsDetailQueryInput input)
    {
        if (input.UserType == 0) // 普通用户
        {
            var query = _repository.AsQueryable()
                .LeftJoin<EventInfo>((p, e) => p.EventId == e.Id)
                .LeftJoin<YD_Event.Core.Entities.Project>((p, e, pr) => p.ProjectId == pr.Id)
                .LeftJoin<ProjectGroup>((p, e, pr, pg) => p.ProjectGroupId == pg.Id)
                .Where((p, e, pr, pg) => !p.DeleteMark)
                .Where((p, e, pr, pg) => p.UserId == input.UserId)
                .WhereIF(input.Type.HasValue, (p, e, pr, pg) => p.Type == input.Type)
                .OrderByDescending((p, e, pr, pg) => p.CreatedTime);
            
            return await query
                .Select((p, e, pr, pg) => new PointsDetailOutput
                {
                    CreatedTime = p.CreatedTime,
                    Type = p.Type,
                    Action = e.EventName,
                    Item = pr.Name,
                    Group = pg.GroupName,
                    Points = p.Points,
                    Remark = p.Remark
                }).ToPagedListAsync(input);

        }
        else // 单位用户
        {
            // 单位用户：查询该单位认证下所有PointsRecord的积分记录
            // input.UserId 在这里是 MerchantCertificationId
            var query = _repository.AsQueryable()
                .LeftJoin<EventInfo>((p, e) => p.EventId == e.Id)
                .LeftJoin<YD_Event.Core.Entities.Project>((p, e, pr) => p.ProjectId == pr.Id)
                .LeftJoin<ProjectGroup>((p, e, pr, pg) => p.ProjectGroupId == pg.Id)
                .LeftJoin<YD_Event.Core.Entities.AppUser>((p, e, pr, pg, u) => p.UserId == u.Id && !u.DeleteMark)
                .Where((p, e, pr, pg, u) => !p.DeleteMark)
                .Where((p, e, pr, pg, u) => p.MerchantCertificationId == input.UserId)
                .WhereIF(input.Type.HasValue, (p, e, pr, pg, u) => p.Type == input.Type)
                .OrderByDescending((p, e, pr, pg, u) => p.CreatedTime);

            return await query
                .Select((p, e, pr, pg, u) => new PointsDetailOutput
                {
                    CreatedTime = p.CreatedTime,
                    Type = p.Type,
                    Action = e.EventName,
                    Item = pr.Name,
                    Group = pg.GroupName,
                    Points = p.Points,
                    Remark = p.Remark,
                    ParticipantName = u.Name, // 参赛人姓名
                    ParticipantId = u.Id      // 参赛人ID
                }).ToPagedListAsync(input);

        }
    }
}