using Admin.NET.Plugin.AiDOP.Entity.S0.Manufacturing;
using Admin.NET.Plugin.AiDOP.Entity.S0.Warehouse;
using Admin.NET.Plugin.AiDOP.Entity.S8;
using Admin.NET.Plugin.AiDOP.Infrastructure.S8;

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

public class S8DashboardService : ITransient
{
    // S8-DASHBOARD-BYOBJECT-NULL-BUCKET-1：byObject / dim-trends(object) 维度统一 NULL 归桶口径。
    // related_object_code 为 NULL/空白 → 归入"未关联"，避免主图空数据误导。
    private const string UnlinkedObjectLabel = "未关联";

    private static string NormalizeRelatedObjectCode(string? relatedObjectCode) =>
        string.IsNullOrWhiteSpace(relatedObjectCode)
            ? UnlinkedObjectLabel
            : relatedObjectCode!.Trim();

    private readonly SqlSugarRepository<AdoS8Exception> _rep;
    private readonly SqlSugarRepository<AdoS0DepartmentMaster> _deptRep;
    private readonly SqlSugarRepository<AdoS8ProcessNode> _processNodeRep;

    public S8DashboardService(
        SqlSugarRepository<AdoS8Exception> rep,
        SqlSugarRepository<AdoS0DepartmentMaster> deptRep,
        SqlSugarRepository<AdoS8ProcessNode> processNodeRep)
    {
        _rep = rep;
        _deptRep = deptRep;
        _processNodeRep = processNodeRep;
    }

    public async Task<object> GetOverviewAsync(long tenantId, long factoryId, DateTime? beginTime = null, DateTime? endTime = null, string? severity = null, string? period = null)
    {
        // 看板顶部的"开始/结束日期"通过 beginTime/endTime 透传，与列表的 beginTime/endTime 同语义。
        // BUG-12：补 severity 过滤，与异常列表 API 的 severity 口径一致（精确匹配 LOW/MEDIUM/HIGH/CRITICAL）。
        // BUG-22：REJECTED 状态归入 pending 桶，避免从总数视角"消失"；与列表 statusBucket="pending" 同步对齐。
        // S8-DASHBOARD-DATA-ALIGN-S1S7-1：统一只统计 module_code IN S1-S7；NULL module 的 legacy 行不参与看板 KPI。
        // 显式日期范围优先；未传时从 period 解析。
        var (periodFrom, periodTo) = (!beginTime.HasValue && !endTime.HasValue)
            ? S8PeriodHelper.Resolve(period)
            : ((DateTime?)null, (DateTime?)null);
        var effectiveFrom = beginTime ?? periodFrom;
        var effectiveTo   = endTime   ?? periodTo;

        var q = _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted)
            .Where(x => S8ModuleCode.All.Contains(x.ModuleCode))
            .WhereIF(effectiveFrom.HasValue, x => x.CreatedAt >= effectiveFrom!.Value)
            .WhereIF(effectiveTo.HasValue,   x => x.CreatedAt < effectiveTo!.Value)
            .WhereIF(!string.IsNullOrWhiteSpace(severity), x => x.Severity == severity);
        var total      = await q.CountAsync();
        var pending    = await q.CountAsync(x => x.Status == "NEW" || x.Status == "ASSIGNED" || x.Status == "IN_PROGRESS" || x.Status == "PENDING_VERIFICATION" || x.Status == "REJECTED");
        var inProgress = await q.CountAsync(x => x.Status == "IN_PROGRESS");
        // S8-SLA-TIMEOUT-RUNTIME-1（P3）：当前超时改为运行时计算 = sla_deadline IS NOT NULL AND sla_deadline < now AND status NOT IN ('CLOSED','RECOVERED')。
        // timeout_flag 已降级 legacy；本批不清理历史 timeout_flag。
        var nowForTimeout = DateTime.Now;
        var timeout    = await q.CountAsync(x => x.SlaDeadline != null && x.SlaDeadline < nowForTimeout && x.Status != "CLOSED" && x.Status != "RECOVERED");
        var closed     = await q.CountAsync(x => x.Status == "CLOSED");
        var todayNew   = await q.CountAsync(x => x.CreatedAt >= DateTime.Today);
        // S8-SEVERITY-FOLLOW-SERIOUS-STANDARDIZE-EXEC-1：critical 字段名保留以维持外部 KPI；语义切为「严重」(SERIOUS)。
        var seriousList = await q.Select(x => x.Severity).ToListAsync();
        var critical   = seriousList.Count(s => S8SeverityCode.IsSerious(s));

        var closureRate = total > 0 ? Math.Round(closed * 100.0 / total, 1) : 0.0;

        // 平均处理周期（小时），仅对已闭环且有关闭时间的记录计算
        var closedRows = await q
            .Where(x => x.Status == "CLOSED" && x.ClosedAt != null)
            .Select(x => new { x.CreatedAt, x.ClosedAt })
            .ToListAsync();
        var avgCycleHours = closedRows.Count > 0
            ? Math.Round(closedRows.Average(x => (x.ClosedAt!.Value - x.CreatedAt).TotalHours), 1)
            : 0.0;

        return new { total, pending, inProgress, timeout, closed, todayNew, critical, closureRate, avgCycleHours };
    }

    public async Task<object> GetTrendsAsync(long tenantId, long factoryId, int days, string? period = null)
    {
        var (periodFrom, periodTo) = S8PeriodHelper.Resolve(period);
        DateTime from, toExclusive;
        if (periodFrom.HasValue && periodTo.HasValue)
        {
            from = periodFrom.Value;
            toExclusive = periodTo.Value;
        }
        else
        {
            from = DateTime.Today.AddDays(-Math.Clamp(days, 1, 90));
            toExclusive = DateTime.Today.AddDays(1);
        }
        var rows = await _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted && x.CreatedAt >= from && x.CreatedAt < toExclusive)
            .Where(x => S8ModuleCode.All.Contains(x.ModuleCode))
            .Select(x => new { x.CreatedAt })
            .ToListAsync();

        return rows
            .GroupBy(x => x.CreatedAt.Date)
            .OrderBy(g => g.Key)
            .Select(g => new { date = g.Key.ToString("yyyy-MM-dd"), count = g.Count() })
            .ToList();
    }

    public async Task<object> GetDistributionsAsync(long tenantId, long factoryId, string? period = null)
    {
        var (periodFrom, periodTo) = S8PeriodHelper.Resolve(period);

        var list = await _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted)
            .Where(x => S8ModuleCode.All.Contains(x.ModuleCode))
            .WhereIF(periodFrom.HasValue, x => x.CreatedAt >= periodFrom!.Value)
            .WhereIF(periodTo.HasValue,   x => x.CreatedAt < periodTo!.Value)
            .Select(x => new
            {
                x.Status,
                x.SceneCode,
                x.Severity,
                x.ResponsibleDeptId,
                x.OccurrenceDeptId,
                // S8-PROCESS-NODE-MODULE-CODE-ALIGNMENT-EXEC-1：byProcess 改用 module_code 聚合。
                x.ModuleCode,
                x.RelatedObjectCode,
            })
            .ToListAsync();

        // 部门名称字典
        var allDeptIds = list.Select(x => x.ResponsibleDeptId)
            .Concat(list.Select(x => x.OccurrenceDeptId))
            .Distinct().ToList();
        // S8-DEPT-DISPLAY-CONSISTENCY-1（P0-A-3）：部门水合加 factory_ref_id 约束，避免跨 factory 同 RecID 错位。
        var deptMap = await _deptRep.AsQueryable()
            .Where(d => allDeptIds.Contains(d.Id) && d.FactoryRefId == factoryId)
            .Select(d => new { d.Id, Name = d.Descr ?? d.Department })
            .ToListAsync();
        var deptDict = deptMap.ToDictionary(d => d.Id, d => d.Name ?? d.Id.ToString());

        // 流程节点名称字典
        var processNodes = await _processNodeRep.AsQueryable()
            .OrderBy(p => p.SortNo)
            .Select(p => new { p.Code, p.Name })
            .ToListAsync();
        var processDict = processNodes.ToDictionary(p => p.Code, p => p.Name);

        return new
        {
            byStatus = list
                .GroupBy(x => x.Status)
                .Select(g => new { key = g.Key, count = g.Count() }),
            // S8-DASHBOARD-BYSCENE-RESERVE-CLEAR-1：byScene 不再生成。
            // 业务展示主口径已切到 module_code（byProcess），保留 scene_code 仅用于建单/规则唯一性/配置 CRUD/历史追溯。
            // 字段保留以维持响应结构兼容；前端无消费方。
            byScene = Array.Empty<object>(),
            // S8-SEVERITY-FOLLOW-SERIOUS-STANDARDIZE-EXEC-1：bySeverity 归一为 FOLLOW/SERIOUS 两桶。
            bySeverity = list
                .GroupBy(x => S8SeverityCode.Normalize(x.Severity))
                .Select(g => new { key = g.Key, count = g.Count() }),
            byDept = list
                .GroupBy(x => x.ResponsibleDeptId)
                .Select(g => new
                {
                    key = g.Key,
                    deptName = deptDict.GetValueOrDefault(g.Key, g.Key.ToString()),
                    count = g.Count(),
                }),
            byOccurrenceDept = list
                .GroupBy(x => x.OccurrenceDeptId)
                .Select(g => new
                {
                    key = g.Key,
                    deptName = deptDict.GetValueOrDefault(g.Key, g.Key.ToString()),
                    count = g.Count(),
                }),
            // S8-PROCESS-NODE-MODULE-CODE-ALIGNMENT-EXEC-1：当前阶段「流程环节」按 module_code 聚合
            // （process_node_code 已挂起，留给未来更细流程节点）。
            // module_code 已经过 S1-S7 过滤（见 line 87 Where(S8ModuleCode.All.Contains(...))），无需再 NULL 兜底。
            // S8-SEVERITY-FOLLOW-SERIOUS-STANDARDIZE-EXEC-1：byProcess 增加 followCount/seriousCount 两段，
            // 供前端「流程环节」黄红堆叠柱使用；count = follow + serious。排序按 S1-S7 自然字典序固定。
            byProcess = list
                .GroupBy(x => x.ModuleCode)
                .Select(g => new
                {
                    key = g.Key,
                    nodeName = processDict.GetValueOrDefault(g.Key, g.Key),
                    count = g.Count(),
                    followCount = g.Count(x => S8SeverityCode.IsFollow(x.Severity)),
                    seriousCount = g.Count(x => S8SeverityCode.IsSerious(x.Severity)),
                })
                .OrderBy(r => r.key),
            byObject = list
                // S8-DASHBOARD-BYOBJECT-NULL-BUCKET-1：不再过滤 NULL，与 dim-trends 口径统一；
                // related_object_code 为空时归入"未关联"桶。
                .GroupBy(x => NormalizeRelatedObjectCode(x.RelatedObjectCode))
                .OrderByDescending(g => g.Count())
                .Take(20)
                .Select(g => new { key = g.Key, count = g.Count() }),
        };
    }

    public async Task<object> GetDeptBacklogAsync(long tenantId, long factoryId, string? period = null)
    {
        var pendingStatuses = new[] { "NEW", "ASSIGNED", "IN_PROGRESS" };
        var (periodFrom, periodTo) = S8PeriodHelper.Resolve(period);

        // S8-SLA-TIMEOUT-RUNTIME-1（P3）：投影 SlaDeadline 替代 TimeoutFlag；timeout 由内存计算（与 GetSummaryAsync 一致 now）。
        var list = await _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted)
            .Where(x => S8ModuleCode.All.Contains(x.ModuleCode))
            .WhereIF(periodFrom.HasValue, x => x.CreatedAt >= periodFrom!.Value)
            .WhereIF(periodTo.HasValue,   x => x.CreatedAt < periodTo!.Value)
            .Select(x => new { x.ResponsibleDeptId, x.Status, x.SlaDeadline })
            .ToListAsync();
        var nowForTimeout = DateTime.Now;

        var deptIds = list.Select(x => x.ResponsibleDeptId).Distinct().ToList();
        // S8-DEPT-DISPLAY-CONSISTENCY-1（P0-A-3）：部门水合加 factory_ref_id 约束。
        var deptMap = await _deptRep.AsQueryable()
            .Where(d => deptIds.Contains(d.Id) && d.FactoryRefId == factoryId)
            .Select(d => new { d.Id, Name = d.Descr ?? d.Department })
            .ToListAsync();
        var deptDict = deptMap.ToDictionary(d => d.Id, d => d.Name ?? d.Id.ToString());

        return list
            .GroupBy(x => x.ResponsibleDeptId)
            .Select(g => new
            {
                deptId   = g.Key,
                deptName = deptDict.GetValueOrDefault(g.Key, g.Key.ToString()),
                pending    = g.Count(x => pendingStatuses.Contains(x.Status)),
                inProgress = g.Count(x => x.Status == "IN_PROGRESS"),
                // S8-SLA-TIMEOUT-RUNTIME-1：当前超时 = sla_deadline 在 now 之前 AND 未 CLOSED/RECOVERED。
                timeout    = g.Count(x => x.SlaDeadline != null && x.SlaDeadline < nowForTimeout && x.Status != "CLOSED" && x.Status != "RECOVERED"),
                total      = g.Count(),
            })
            .OrderByDescending(x => x.pending)
            .ToList();
    }

    /// <summary>
    /// 按维度返回多系列日趋势数据。dim: object | process | occDept | respDept
    /// 返回: { dates, series: [{ name, data[] }] }
    /// </summary>
    public async Task<object> GetDimTrendsAsync(long tenantId, long factoryId, string dim, int days, string? period = null)
    {
        var (periodFrom, periodTo) = S8PeriodHelper.Resolve(period);
        DateTime from, toExclusive;
        if (periodFrom.HasValue && periodTo.HasValue)
        {
            from = periodFrom.Value;
            toExclusive = periodTo.Value;
        }
        else
        {
            from = DateTime.Today.AddDays(-Math.Clamp(days, 1, 90));
            toExclusive = DateTime.Today.AddDays(1);
        }

        var rows = await _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted && x.CreatedAt >= from && x.CreatedAt < toExclusive)
            .Where(x => S8ModuleCode.All.Contains(x.ModuleCode))
            .Select(x => new
            {
                x.CreatedAt,
                // S8-PROCESS-NODE-MODULE-CODE-ALIGNMENT-EXEC-1：dim=process 改用 module_code 聚合。
                x.ModuleCode,
                x.RelatedObjectCode,
                x.OccurrenceDeptId,
                x.ResponsibleDeptId,
            })
            .ToListAsync();

        // 生成连续日期序列（含首尾，endDate 取 toExclusive-1 与 Today 较小值避免未来日期）
        var endDate = new[] { toExclusive.AddDays(-1).Date, DateTime.Today }.Min();
        var dates = Enumerable.Range(0, (endDate - from.Date).Days + 1)
            .Select(i => from.AddDays(i).Date)
            .ToList();
        var dateLabels = dates.Select(d => d.ToString("yyyy-MM-dd")).ToList();

        // 按维度取 key 函数
        // S8-DASHBOARD-BYOBJECT-NULL-BUCKET-1：object 维度 NULL/空白统一归入"未关联"，与 byObject 口径一致；
        // process 维度沿用历史"未设置"作为兜底（理论不会命中：上方 Where 已限定 module_code IN S1-S7）。
        // S8-PROCESS-NODE-MODULE-CODE-ALIGNMENT-EXEC-1：process 改用 module_code（process_node_code 挂起）。
        Func<dynamic, string> keySelector = dim switch
        {
            "process"  => r => r.ModuleCode ?? "未设置",
            "occDept"  => r => r.OccurrenceDeptId.ToString(),
            "respDept" => r => r.ResponsibleDeptId.ToString(),
            _          => r => NormalizeRelatedObjectCode((string?)r.RelatedObjectCode),   // object
        };

        var grouped = rows
            .GroupBy(r => keySelector(r))
            .OrderByDescending(g => g.Count())
            .Take(8)    // 最多取 8 个系列，避免图例过多
            .ToList();

        // 补全部门名 / 流程节点名
        Dictionary<string, string> nameMap = new();
        if (dim == "process")
        {
            var nodes = await _processNodeRep.AsQueryable().ToListAsync();
            nameMap = nodes.ToDictionary(n => n.Code, n => n.Name);
        }
        else if (dim is "occDept" or "respDept")
        {
            var ids = grouped.Select(g => long.TryParse(g.Key, out var id) ? id : 0).ToList();
            // S8-DEPT-DISPLAY-CONSISTENCY-1-FOLLOWUP-1（P0-A-3 收尾）：部门水合加 factory_ref_id 约束，
            // 与 GetDistributionsAsync / GetDeptBacklogAsync 同口径，避免跨 factory 同名/同 RecID 错位。
            var depts = await _deptRep.AsQueryable()
                .Where(d => ids.Contains(d.Id) && d.FactoryRefId == factoryId)
                .Select(d => new { d.Id, Name = d.Descr ?? d.Department })
                .ToListAsync();
            nameMap = depts.ToDictionary(d => d.Id.ToString(), d => d.Name ?? d.Id.ToString());
        }

        var series = grouped.Select(g =>
        {
            var seriesName = nameMap.TryGetValue(g.Key, out var n) ? n : g.Key;
            var byDate = g.GroupBy(r => r.CreatedAt.Date).ToDictionary(x => x.Key, x => x.Count());
            var data = dates.Select(d => byDate.TryGetValue(d, out var c) ? c : 0).ToList();
            return new { name = seriesName, data };
        }).ToList();

        return new { dates = dateLabels, series };
    }

    public async Task<List<AdoS8Exception>> GetQuickExceptionsAsync(long tenantId, long factoryId, string mode)
    {
        var q = _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted)
            .Where(x => S8ModuleCode.All.Contains(x.ModuleCode));
        // S8-SLA-TIMEOUT-RUNTIME-1（P3）：timeout 模式按 sla_deadline 在线计算筛 + 升序。
        var nowForTimeout = DateTime.Now;
        var ordered = mode switch
        {
            "high-priority" => q.OrderBy(x => x.PriorityScore, OrderByType.Desc),
            "timeout"       => q.Where(x => x.SlaDeadline != null && x.SlaDeadline < nowForTimeout && x.Status != "CLOSED" && x.Status != "RECOVERED").OrderBy(x => x.SlaDeadline),
            _               => q.OrderBy(x => x.CreatedAt, OrderByType.Desc),
        };
        return await ordered.Take(20).ToListAsync();
    }
}