using Admin.NET.Plugin.AiDOP.Dto.S8;
using Admin.NET.Plugin.AiDOP.Entity.S8;

namespace Admin.NET.Plugin.AiDOP.Service.S8;

/// <summary>
/// 大屏卡片数据查询服务：按 (pageCode, cellCode) 读取配置，按 binding_type 分发组装结果。
/// 配置解析：工厂覆盖优先（tenant+factory 精确匹配）→ 全局基线（tenant=0/factory=0）兜底。
/// </summary>
public class S8DashboardCellDataService : ITransient
{
    private readonly SqlSugarRepository<AdoS8DashboardCellConfig> _cfgRep;
    private readonly SqlSugarRepository<AdoS8Exception> _exRep;
    private readonly SqlSugarRepository<SysOrg> _orgRep;

    public S8DashboardCellDataService(
        SqlSugarRepository<AdoS8DashboardCellConfig> cfgRep,
        SqlSugarRepository<AdoS8Exception> exRep,
        SqlSugarRepository<SysOrg> orgRep)
    {
        _cfgRep = cfgRep;
        _exRep = exRep;
        _orgRep = orgRep;
    }

    public async Task<AdoS8CellDataDto> GetAsync(AdoS8CellDataQueryDto q)
    {
        if (string.IsNullOrWhiteSpace(q.PageCode) || string.IsNullOrWhiteSpace(q.CellCode))
            throw new S8BizException("pageCode 和 cellCode 必填");

        var cfg = await ResolveConfigAsync(q.TenantId, q.FactoryId, q.PageCode, q.CellCode);
        if (cfg is null)
            return new AdoS8CellDataDto
            {
                PageCode = q.PageCode,
                CellCode = q.CellCode,
                Message = "未配置",
            };
        if (!cfg.Enabled)
            return new AdoS8CellDataDto
            {
                PageCode = q.PageCode,
                CellCode = q.CellCode,
                BindingType = cfg.BindingType,
                Title = cfg.CellTitle,
                StatMetric = cfg.StatMetric,
                TimeWindow = cfg.TimeWindow,
                Message = "已禁用",
            };

        var (from, to) = TimeRange(cfg.TimeWindow);
        var effectiveDeptGroupBy = !string.IsNullOrWhiteSpace(q.DeptGroupBy) ? q.DeptGroupBy! : cfg.DeptGroupBy;

        // 取事实数据
        var events = await _exRep.AsQueryable()
            .Where(e => e.TenantId == q.TenantId && e.FactoryId == q.FactoryId && !e.IsDeleted)
            .Where(e => e.CreatedAt >= from && e.CreatedAt < to)
            .Select(e => new EvtRow
            {
                Status = e.Status,
                ExceptionTypeCode = e.ExceptionTypeCode,
                ModuleCode = e.ModuleCode,
                SceneCode = e.SceneCode,
                ResponsibleDeptId = e.ResponsibleDeptId,
                OccurrenceDeptId = e.OccurrenceDeptId,
                CreatedAt = e.CreatedAt,
                ClosedAt = e.ClosedAt,
            })
            .ToListAsync();

        // 按 binding_type 过滤
        IEnumerable<EvtRow> scoped = cfg.BindingType switch
        {
            "EXCEPTION_TYPE" => events.Where(e => !string.IsNullOrEmpty(cfg.ExceptionTypeCode) && e.ExceptionTypeCode == cfg.ExceptionTypeCode),
            "AGGREGATE"      => ApplyAggregateScope(events, cfg.AggregateScope),
            _                => events, // CUSTOM：不按类型过滤，返回同页范围聚合值供前端参考
        };
        var list = scoped.ToList();

        var dto = new AdoS8CellDataDto
        {
            CellCode    = cfg.CellCode,
            PageCode    = cfg.PageCode,
            Title       = cfg.CellTitle,
            BindingType = cfg.BindingType,
            StatMetric  = cfg.StatMetric,
            TimeWindow  = cfg.TimeWindow,
            Value       = ComputeValue(list, cfg.StatMetric),
        };

        // 明细分组：AGGREGATE 按部门；EXCEPTION_TYPE 可选按部门；CUSTOM 跳过
        if (cfg.BindingType == "AGGREGATE" || cfg.BindingType == "EXCEPTION_TYPE")
        {
            dto.Breakdown = await BuildDeptBreakdownAsync(list, effectiveDeptGroupBy, cfg.StatMetric);
        }

        return dto;
    }

    private async Task<AdoS8DashboardCellConfig?> ResolveConfigAsync(long tenantId, long factoryId, string pageCode, string cellCode)
    {
        var rows = await _cfgRep.AsQueryable()
            .Where(x => x.PageCode == pageCode && x.CellCode == cellCode
                && ((x.TenantId == 0 && x.FactoryId == 0)
                    || (x.TenantId == tenantId && x.FactoryId == factoryId)))
            .ToListAsync();
        return rows.OrderByDescending(x => x.FactoryId).FirstOrDefault();
    }

    private static (DateTime from, DateTime to) TimeRange(string window)
    {
        var now = DateTime.Now;
        return window switch
        {
            "TODAY"    => (now.Date, now.Date.AddDays(1)),
            "LAST_24H" => (now.AddHours(-24), now.AddMinutes(1)),
            "LAST_7D"  => (now.AddDays(-7),   now.AddMinutes(1)),
            "LAST_30D" => (now.AddDays(-30),  now.AddMinutes(1)),
            _          => (now.AddHours(-24), now.AddMinutes(1)),
        };
    }

    private static IEnumerable<EvtRow> ApplyAggregateScope(List<EvtRow> events, string? scope) => scope switch
    {
        "DOMAIN_DELIVERY"   => events.Where(e => e.SceneCode == "S1S7_DELIVERY"),
        "DOMAIN_PRODUCTION" => events.Where(e => e.SceneCode == "S2S6_PRODUCTION"),
        "DOMAIN_SUPPLY"     => events.Where(e => e.SceneCode == "S3S5_SUPPLY"),
        "ALL"               => events,
        _                   => events,
    };

    private static double ComputeValue(List<EvtRow> rows, string metric)
    {
        if (rows.Count == 0) return 0;
        return metric switch
        {
            "OPEN_COUNT"   => rows.Count(e => e.Status != "CLOSED"),
            "FREQUENCY"    => rows.Count,
            "AVG_DURATION" => AvgHours(rows),
            "CLOSE_RATE"   => Math.Round(rows.Count(e => e.Status == "CLOSED") * 100.0 / rows.Count, 1),
            _              => rows.Count,
        };
    }

    private static double AvgHours(List<EvtRow> rows)
    {
        var closed = rows.Where(r => r.ClosedAt.HasValue).ToList();
        if (closed.Count == 0) return 0;
        return Math.Round(closed.Average(r => (r.ClosedAt!.Value - r.CreatedAt).TotalHours), 1);
    }

    private async Task<List<AdoS8CellBreakdownItem>> BuildDeptBreakdownAsync(List<EvtRow> rows, string groupBy, string metric)
    {
        Func<EvtRow, long> keySel = groupBy == "OCCUR"
            ? (EvtRow e) => e.OccurrenceDeptId
            : (EvtRow e) => e.ResponsibleDeptId;

        var groups = rows.Where(e => keySel(e) > 0).GroupBy(keySel).ToList();
        if (groups.Count == 0) return new();

        var deptIds = groups.Select(g => g.Key).Distinct().ToList();
        var names = (await _orgRep.AsQueryable().Where(o => deptIds.Contains(o.Id)).Select(o => new { o.Id, o.Name }).ToListAsync())
            .ToDictionary(o => o.Id, o => o.Name);

        return groups.Select(g =>
        {
            var list = g.ToList();
            return new AdoS8CellBreakdownItem
            {
                Code  = g.Key.ToString(),
                Label = names.TryGetValue(g.Key, out var n) ? n : $"部门{g.Key}",
                Value = ComputeValue(list, metric),
            };
        })
        .OrderByDescending(i => i.Value)
        .ToList();
    }

    private class EvtRow
    {
        public string Status { get; set; } = string.Empty;
        public string? ExceptionTypeCode { get; set; }
        public string? ModuleCode { get; set; }
        public string? SceneCode { get; set; }
        public long ResponsibleDeptId { get; set; }
        public long OccurrenceDeptId { get; set; }
        public DateTime CreatedAt { get; set; }
        public DateTime? ClosedAt { get; set; }
    }
}