using Admin.NET.Core;
using Admin.NET.Plugin.AiDOP.Entity;
using SqlSugar;

namespace Admin.NET.Plugin.AiDOP.SmartOps;

/// <summary>维度看板解析结果（供 Dashboard 受管码筛选取数；绝不回落旧 Atomic）。</summary>
public sealed class KpiDimensionDashboardResult
{
    /// <summary>SUCCESS / NO_DATA / NOT_CONFIGURED / VERSION_MISMATCH。</summary>
    public string Status { get; set; } = "NO_DATA";
    /// <summary>前端每指标 filterMode：configurable_dimension / dimension_no_data / filter_not_configured / version_mismatch。</summary>
    public string FilterMode { get; set; } = "dimension_no_data";
    public decimal? MetricValue { get; set; }
    public List<(string Date, decimal? Value)> Trend { get; set; } = new();
    public int? SummaryConfigVersion { get; set; }
    public int? DimensionConfigVersion { get; set; }
}

/// <summary>
/// 维度看板取数服务：为受管 KPI（本批 S7_L1_001）在有筛选时从 ado_smart_ops_kpi_dimension_value_day
/// 读当前激活维度版本结果，按 AggregationType 复算筛选值 + 逐日趋势。校验绑定汇总版本一致；
/// 无配置/版本不匹配/无数据均返回明确状态，**不回落旧 Atomic**。
/// </summary>
public sealed class KpiDimensionDashboardService : ITransient
{
    public const string FilterModeConfigured = "configurable_dimension";
    public const string FilterModeNoData = "dimension_no_data";
    public const string FilterModeNotConfigured = "filter_not_configured";
    public const string FilterModeVersionMismatch = "version_mismatch";

    private readonly ISqlSugarClient _db;
    private readonly AdoSmartOpsKpiDimensionConfigService _dimensionConfig;
    private readonly AdoSmartOpsKpiCalcConfigService _summaryConfig;

    public KpiDimensionDashboardService(
        ISqlSugarClient db, AdoSmartOpsKpiDimensionConfigService dimensionConfig, AdoSmartOpsKpiCalcConfigService summaryConfig)
    {
        _db = db;
        _dimensionConfig = dimensionConfig;
        _summaryConfig = summaryConfig;
    }

    public async Task<KpiDimensionDashboardResult> ResolveAsync(
        long tenantId, long factoryId, string metricCode, string moduleCode, SmartOpsDashboardFilter filter)
    {
        // 维度配置/结果落在 KPI 数据租户（S5/S6/S7→pbxfxp/AIDOP），与看板会话租户可能不同，须显式解析
        var kpiTenantId = AdoSmartOpsKpiCalcConfigService.ResolveKpiTenantId(moduleCode);
        var active = await _dimensionConfig.GetActiveAsync(kpiTenantId, metricCode);
        if (active == null)
            return new KpiDimensionDashboardResult { Status = "NOT_CONFIGURED", FilterMode = FilterModeNotConfigured };

        var summary = await _summaryConfig.GetActiveAsync(kpiTenantId, metricCode);
        if (summary == null || summary.Id != active.SummaryConfigId || summary.VersionNo != active.SummaryConfigVersion)
            return new KpiDimensionDashboardResult
            {
                Status = "VERSION_MISMATCH", FilterMode = FilterModeVersionMismatch,
                SummaryConfigVersion = active.SummaryConfigVersion, DimensionConfigVersion = active.DimensionConfigVersion,
            };

        var result = new KpiDimensionDashboardResult
        {
            SummaryConfigVersion = active.SummaryConfigVersion,
            DimensionConfigVersion = active.DimensionConfigVersion,
        };

        var ds = filter.DateStart?.Date;
        var de = filter.DateEnd?.Date;
        // 业务维度值统一落在 DimensionCode（各 KPI 声明维度不同：物料/工单/订单/品类），
        // 同时兼容标准列匹配。前端只发该 KPI SupportedDimensions 内的维度。
        var orderNo = string.IsNullOrWhiteSpace(filter.OrderNo) ? null : filter.OrderNo!.Trim();
        var material = string.IsNullOrWhiteSpace(filter.Material) ? null : filter.Material!.Trim();
        var workOrder = string.IsNullOrWhiteSpace(filter.WorkOrder) ? null : filter.WorkOrder!.Trim();
        ISugarQueryable<AdoSmartOpsKpiDimensionValueDay> Build() =>
            _db.Queryable<AdoSmartOpsKpiDimensionValueDay>().ClearFilter<ITenantIdFilter>()
                .Where(x => x.TenantId == kpiTenantId && x.MetricCode == metricCode
                            && x.DimensionConfigVersion == active.DimensionConfigVersion)
                .WhereIF(ds.HasValue, x => x.ValueDate >= ds!.Value)
                .WhereIF(de.HasValue, x => x.ValueDate <= de!.Value)
                .WhereIF(orderNo != null, x => x.OrderNo == orderNo || x.DimensionCode == orderNo)
                .WhereIF(material != null, x => x.MaterialCode == material || x.DimensionCode == material)
                .WhereIF(workOrder != null, x => x.WorkOrderNo == workOrder || x.DimensionCode == workOrder);

        result.MetricValue = await AggregateAsync(active.AggregationType, Build);
        // 逐日趋势（同 AggregationType 复算）
        var grouped = await Build().GroupBy(x => x.ValueDate)
            .Select(x => new DimTrendRow
            {
                D = x.ValueDate,
                SumSum = SqlFunc.AggregateSum(x.SumValue),
                SumCnt = SqlFunc.AggregateSum(x.SampleCount),
                SumNum = SqlFunc.AggregateSum(x.Numerator),
                SumDen = SqlFunc.AggregateSum(x.Denominator),
                AvgMv = SqlFunc.AggregateAvg(x.MetricValue),
            })
            .OrderBy(x => x.D).ToListAsync();
        result.Trend = grouped
            .Select(g => (g.D.ToString("yyyy-MM-dd"), ComputeAggregate(active.AggregationType, g.SumSum, g.SumCnt, g.SumNum, g.SumDen, g.AvgMv)))
            .ToList();

        if (result.MetricValue == null)
        {
            result.Status = "NO_DATA";
            result.FilterMode = FilterModeNoData;
        }
        else
        {
            result.Status = "SUCCESS";
            result.FilterMode = FilterModeConfigured;
        }
        return result;
    }

    private static async Task<decimal?> AggregateAsync(string aggregationType, Func<ISugarQueryable<AdoSmartOpsKpiDimensionValueDay>> build)
    {
        return aggregationType switch
        {
            "AVERAGE_OF_SUMS" => Div(await build().SumAsync(x => x.SumValue), (decimal?)await build().SumAsync(x => x.SampleCount)),
            "RATIO_OF_SUMS" => Div(await build().SumAsync(x => x.Numerator), await build().SumAsync(x => x.Denominator)),
            "DIRECT_VALUE" => await build().AvgAsync(x => x.MetricValue),
            _ => null,
        };
    }

    private static decimal? ComputeAggregate(string aggregationType, decimal? sumSum, decimal? sumCnt, decimal? sumNum, decimal? sumDen, decimal? avgMv)
        => aggregationType switch
        {
            "AVERAGE_OF_SUMS" => Div(sumSum, sumCnt),
            "RATIO_OF_SUMS" => Div(sumNum, sumDen),
            "DIRECT_VALUE" => avgMv,
            _ => null,
        };

    private static decimal? Div(decimal? a, decimal? b) =>
        b.HasValue && b.Value != 0 ? (a ?? 0m) / b.Value : null;

    private sealed class DimTrendRow
    {
        public DateTime D { get; set; }
        public decimal? SumSum { get; set; }
        public decimal? SumCnt { get; set; }
        public decimal? SumNum { get; set; }
        public decimal? SumDen { get; set; }
        public decimal? AvgMv { get; set; }
    }
}