using Furion.FriendlyException;
using Microsoft.Extensions.Logging;
using YD_Event.Application.Points.Dtos;
using YD_Event.Core.Entities;

namespace YD_Event.Application.Points;

/// <summary>
/// 积分规则管理
/// </summary>
public class PointsRuleService : BaseService<PointsRule>, ITransient
{
    private readonly ISqlSugarRepository<PointsRule> _repository;
    private readonly ISqlSugarRepository<PointsRuleDetail> _detailRepository;
    private readonly ISqlSugarRepository<PointsRecord> _pointsRecordRepository;
    private readonly IIdGenerator _idGenerator;
    private readonly Microsoft.Extensions.Logging.ILogger<PointsRuleService> _logger;

    public PointsRuleService(ISqlSugarRepository<PointsRule> repository,
        ISqlSugarRepository<PointsRuleDetail> detailRepository,
        ISqlSugarRepository<PointsRecord> pointsRecordRepository,
        IIdGenerator idGenerator,
        Microsoft.Extensions.Logging.ILogger<PointsRuleService> logger) : base(repository)
    {
        _repository = repository;
        _detailRepository = detailRepository;
        _pointsRecordRepository = pointsRecordRepository;
        _idGenerator = idGenerator;
        _logger = logger;
    }

    /// <summary>
    /// 积分规则分页查询
    /// </summary>
    [DisplayName("积分规则分页查询")]
    [HttpGet]
    public async Task<PageResult<PointsRule>> Page([FromQuery] PointsRuleQueryInput input)
    {
        return await _repository.AsQueryable()
            .WhereIF(!string.IsNullOrWhiteSpace(input.RuleName), x => x.RuleName.Contains(input.RuleName))
            .OrderByDescending(x => x.CreatedTime)
            .ToPagedListAsync(input);
    }

    /// <summary>
    /// 添加积分规则
    /// </summary>
    [DisplayName("添加积分规则")]
    [HttpPost("add")]
    [UnitOfWork]
    public async Task Add(AddPointsRuleInput input)
    {
        ValidateRankDetails(input.Details);
        
        var entity = input.Adapt<PointsRule>();
        entity.Id = _idGenerator.NextId();
        
        await _repository.InsertAsync(entity);

        if (input.Details != null && input.Details.Any())
        {
            var details = input.Details.Adapt<List<PointsRuleDetail>>();
            details.ForEach(x => 
            {
                x.PointsRuleId = entity.Id;
                x.Id = _idGenerator.NextId();
            });
            await _detailRepository.InsertRangeAsync(details);
        }
    }

    /// <summary>
    /// 更新积分规则
    /// </summary>
    [DisplayName("更新积分规则")]
    [HttpPut("edit")]
    [UnitOfWork]
    public async Task Update(UpdatePointsRuleInput input)
    {
        var entity = await _repository.GetByIdAsync(input.Id);
        if (entity == null) throw Oops.Bah("规则不存在");

        ValidateRankDetails(input.Details);

        input.Adapt(entity);
        await _repository.UpdateAsync(entity);

        // Update details: Delete old, Insert new
        await _detailRepository.DeleteAsync(x => x.PointsRuleId == entity.Id);

        if (input.Details != null && input.Details.Any())
        {
            var details = input.Details.Adapt<List<PointsRuleDetail>>();
            details.ForEach(x => 
            {
                x.PointsRuleId = entity.Id;
                x.Id = _idGenerator.NextId();
            });
            await _detailRepository.InsertRangeAsync(details);
        }
    }

    /// <summary>
    /// 验证名次积分详情是否有重叠
    /// </summary>
    private void ValidateRankDetails(List<PointsRuleDetailInput>? details)
    {
        if (details == null || details.Count <= 1)
            return;

        for (int i = 0; i < details.Count; i++)
        {
            var item1 = details[i];
            
            for (int j = i + 1; j < details.Count; j++)
            {
                var item2 = details[j];
                
                // 检查是否重叠：两个区间 [s1, e1] 和 [s2, e2] 不重叠的条件是 e1 < s2 或 e2 < s1
                bool isOverlap = !(item1.EndRank < item2.StartRank || item2.EndRank < item1.StartRank);
                if (isOverlap)
                {
                    throw Oops.Bah($"名次范围 {item1.StartRank}-{item1.EndRank} 与 {item2.StartRank}-{item2.EndRank} 存在重叠，请调整！");
                }
            }
        }
    }

    /// <summary>
    /// 删除积分规则
    /// </summary>
    [DisplayName("删除积分规则")]
    [HttpPost("delete")]
    [UnitOfWork]
    public async Task Delete([FromBody] List<long> ids)
    {
        _logger.LogInformation("开始删除积分规则：规则ID列表={Ids}", string.Join(",", ids ?? new List<long>()));

        if (ids == null || !ids.Any())
        {
            _logger.LogWarning("删除积分规则失败：未选择积分规则");
            return;
        }

        // 执行删除
        await _repository.DeleteAsync(x => ids.Contains(x.Id));
        await _detailRepository.DeleteAsync(x => ids.Contains(x.PointsRuleId));

        _logger.LogInformation("删除积分规则成功：规则ID列表={Ids}", string.Join(",", ids));
    }

    /// <summary>
    /// 获取积分规则详情
    /// </summary>
    [DisplayName("获取积分规则详情")]
    [HttpGet("detail")]
    public async Task<PointsRule> Detail([FromQuery] long id)
    {
        var entity = await _repository.GetByIdAsync(id);
        if (entity == null) throw Oops.Bah("规则不存在");
        
        entity.Details = await _detailRepository.AsQueryable().Where(x => x.PointsRuleId == id).ToListAsync();
        return entity;
    }
}