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

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

public class S8MonitoringService : ITransient
{
    private readonly SqlSugarRepository<AdoS8Exception> _rep;
    private readonly SqlSugarRepository<AdoS8ExceptionType> _typeRep;
    private readonly SqlSugarRepository<SysOrg> _orgRep;

    public S8MonitoringService(
        SqlSugarRepository<AdoS8Exception> rep,
        SqlSugarRepository<AdoS8ExceptionType> typeRep,
        SqlSugarRepository<SysOrg> orgRep)
    {
        _rep = rep;
        _typeRep = typeRep;
        _orgRep = orgRep;
    }

    /// <summary>
    /// 9宫格数据：S1-S7 订单健康分布 + S8业务类别汇总 + S9部门汇总。
    /// 数据来源 ado_s8_exception 聚合；异常表为空时返回全 0（不再返回 Demo 数据）。
    /// </summary>
    public async Task<AdoS8OrderGridDto> GetOrderGridAsync(long tenantId = 1, long factoryId = 1)
    {
        var events = await _rep.AsQueryable()
            .Where(e => e.TenantId == tenantId && e.FactoryId == factoryId && !e.IsDeleted)
            .Select(e => new
            {
                e.ModuleCode,
                e.Severity,
                e.Status,
                e.TimeoutFlag,
                e.ExceptionTypeCode,
                e.SceneCode,
                e.ResponsibleDeptId,
                e.CreatedAt,
                e.ClosedAt
            })
            .ToListAsync();

        // ── Modules：按 module_code 聚合 ──
        var modules = S8ModuleCode.All.Select(mc =>
        {
            var rows = events.Where(e => e.ModuleCode == mc).ToList();
            var unclosed = rows.Where(e => e.Status != "CLOSED").ToList();
            var red    = unclosed.Count(e => e.Severity == "CRITICAL" || e.Severity == "HIGH");
            var yellow = unclosed.Count(e => e.Severity == "MEDIUM");
            var green  = unclosed.Count(e => e.Severity == "LOW");
            var closed = rows.Count(e => e.Status == "CLOSED");
            var total  = rows.Count;
            return new AdoS8ModuleOrderSummary
            {
                ModuleCode      = mc,
                ModuleLabel     = S8ModuleCode.Label(mc),
                Green           = green,
                Yellow          = yellow,
                Red             = red,
                Total           = total,
                Frequency       = total,
                AvgProcessHours = AvgHours(rows.Select(r => (r.CreatedAt, r.ClosedAt))),
                CloseRate       = total == 0 ? 0 : Math.Round(closed * 100.0 / total, 1),
            };
        }).ToList();

        // ── ByCategory：按异常类型的 domain_code/type_code 聚合为 5 大业务类别 ──
        var typeMap = (await _typeRep.AsQueryable()
                .Where(t => (t.TenantId == 0 && t.FactoryId == 0)
                         || (t.TenantId == tenantId && t.FactoryId == factoryId))
                .ToListAsync())
            .GroupBy(t => t.TypeCode)
            .ToDictionary(g => g.Key, g => g.OrderByDescending(x => x.FactoryId).First());

        var byCategory = events
            .Where(e => !string.IsNullOrEmpty(e.ExceptionTypeCode) && typeMap.ContainsKey(e.ExceptionTypeCode!))
            .GroupBy(e => CategoryOf(typeMap[e.ExceptionTypeCode!]))
            .Where(g => !string.IsNullOrEmpty(g.Key))
            .Select(g =>
            {
                var total  = g.Count();
                var closed = g.Count(e => e.Status == "CLOSED");
                return new AdoS8CategorySummary
                {
                    Category        = g.Key!,
                    Total           = total,
                    AvgProcessHours = AvgHours(g.Select(e => (e.CreatedAt, e.ClosedAt))),
                    CloseRate       = total == 0 ? 0 : Math.Round(closed * 100.0 / total, 1),
                };
            })
            .OrderBy(c => CategoryOrder(c.Category))
            .ToList();

        // ── ByDept：按 ResponsibleDeptId 聚合，JOIN SysOrg 取部门名称 ──
        var deptIds = events.Select(e => e.ResponsibleDeptId).Where(id => id > 0).Distinct().ToList();
        var deptNameMap = deptIds.Count == 0
            ? new Dictionary<long, string>()
            : (await _orgRep.AsQueryable().Where(o => deptIds.Contains(o.Id)).Select(o => new { o.Id, o.Name }).ToListAsync())
                .ToDictionary(o => o.Id, o => o.Name);

        var byDept = events
            .Where(e => e.ResponsibleDeptId > 0)
            .GroupBy(e => e.ResponsibleDeptId)
            .Select(g =>
            {
                var total  = g.Count();
                var closed = g.Count(e => e.Status == "CLOSED");
                return new AdoS8DeptSummary
                {
                    DeptName        = deptNameMap.TryGetValue(g.Key, out var n) ? n : $"部门{g.Key}",
                    Total           = total,
                    AvgProcessHours = AvgHours(g.Select(e => (e.CreatedAt, e.ClosedAt))),
                    CloseRate       = total == 0 ? 0 : Math.Round(closed * 100.0 / total, 1),
                };
            })
            .OrderByDescending(d => d.Total)
            .ToList();

        return new AdoS8OrderGridDto
        {
            Modules    = modules,
            ByCategory = byCategory,
            ByDept     = byDept,
        };
    }

    private static double AvgHours(IEnumerable<(DateTime createdAt, DateTime? closedAt)> items)
    {
        var closed = items.Where(x => x.closedAt.HasValue).ToList();
        if (closed.Count == 0) return 0;
        var avg = closed.Average(x => (x.closedAt!.Value - x.createdAt).TotalHours);
        return Math.Round(avg, 1);
    }

    /// <summary>异常类型 → 业务类别（与 Overview 页 5 张类别卡对应）。</summary>
    private static string CategoryOf(AdoS8ExceptionType t) => t.TypeCode switch
    {
        "ORDER_CHANGE"        => "订单评审",
        "DELIVERY_DELAY"      => "总装发货",
        "PENDING_SHIPMENT"    => "总装发货",
        "EQUIP_FAULT"         => "本体生产",
        "MATERIAL_SHORTAGE"   => "本体生产",
        "QUALITY_DEFECT"      => "本体生产",
        "SUPPLIER_ETA_ISSUE"  => "材料采购",
        "SUPPLIER_SHIP_ISSUE" => "材料采购",
        "WH_INBOUND_ISSUE"    => "材料采购",
        "IQC_ISSUE"           => "材料采购",
        "WH_PUTAWAY_ISSUE"    => "材料采购",
        "WH_KIT_ISSUE"        => "本体生产",
        "WH_ISSUE_OUT_ISSUE"  => "本体生产",
        _                     => string.Empty,
    };

    private static int CategoryOrder(string category) => category switch
    {
        "订单评审" => 1,
        "产品设计" => 2,
        "材料采购" => 3,
        "本体生产" => 4,
        "总装发货" => 5,
        _         => 99,
    };

    /// <summary>
    /// 异常监控汇总：按 module_code 分组统计红/黄/绿/超时数。
    /// 供综合全景页顶部徽标和模块汇总表使用。
    /// </summary>
    public async Task<AdoS8MonitoringSummaryDto> GetSummaryAsync(AdoS8MonitoringSummaryQueryDto q)
    {
        var query = _rep.AsQueryable()
            .Where(e => e.TenantId == q.TenantId && e.FactoryId == q.FactoryId && !e.IsDeleted)
            .WhereIF(!string.IsNullOrWhiteSpace(q.SceneCode), e => e.SceneCode == q.SceneCode)
            .WhereIF(!string.IsNullOrWhiteSpace(q.ModuleCode), e => e.ModuleCode == q.ModuleCode)
            .WhereIF(q.BizDateFrom.HasValue, e => e.CreatedAt >= q.BizDateFrom!.Value)
            .WhereIF(q.BizDateTo.HasValue, e => e.CreatedAt <= q.BizDateTo!.Value);

        // 聚合到内存（数据量在可控范围内，避免复杂 GROUP BY 兼容性问题）
        var raw = await query
            .Select(e => new
            {
                e.ModuleCode,
                e.SceneCode,
                e.Severity,
                e.TimeoutFlag,
                e.Status
            })
            .ToListAsync();

        var byModule = raw
            .GroupBy(e => new { mc = e.ModuleCode ?? string.Empty, sc = e.SceneCode ?? string.Empty })
            .Select(g => new AdoS8ModuleSummaryItem
            {
                ModuleCode  = g.Key.mc,
                ModuleLabel = S8ModuleCode.Label(g.Key.mc),
                SceneCode   = g.Key.sc,
                SceneLabel  = S8SceneCode.Label(g.Key.sc),
                Total   = g.Count(),
                Red     = g.Count(e => e.Severity == "CRITICAL" || e.Severity == "HIGH"),
                Yellow  = g.Count(e => e.Severity == "MEDIUM"),
                Green   = g.Count(e => e.Severity == "LOW"),
                Timeout = g.Count(e => e.TimeoutFlag && e.Status != "CLOSED")
            })
            // 按 S8ModuleCode.All 顺序排列
            .OrderBy(r => Array.IndexOf(S8ModuleCode.All, r.ModuleCode))
            .ToList();

        return new AdoS8MonitoringSummaryDto
        {
            Total   = raw.Count,
            Red     = raw.Count(e => e.Severity == "CRITICAL" || e.Severity == "HIGH"),
            Yellow  = raw.Count(e => e.Severity == "MEDIUM"),
            Green   = raw.Count(e => e.Severity == "LOW"),
            Timeout = raw.Count(e => e.TimeoutFlag && e.Status != "CLOSED"),
            ByModule = byModule
        };
    }
}