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

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

public class S8DashboardService : ITransient
{
    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)
    {
        // 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。
        var q = _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted)
            .WhereIF(beginTime.HasValue, x => x.CreatedAt >= beginTime!.Value)
            .WhereIF(endTime.HasValue, x => x.CreatedAt <= endTime!.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");
        var timeout    = await q.CountAsync(x => x.TimeoutFlag);
        var closed     = await q.CountAsync(x => x.Status == "CLOSED");
        var todayNew   = await q.CountAsync(x => x.CreatedAt >= DateTime.Today);
        var critical   = await q.CountAsync(x => x.Severity == "CRITICAL");

        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)
    {
        var from = DateTime.Today.AddDays(-Math.Clamp(days, 1, 90));
        var rows = await _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted && x.CreatedAt >= from)
            .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)
    {
        var list = await _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted)
            .Select(x => new
            {
                x.Status,
                x.SceneCode,
                x.Severity,
                x.ResponsibleDeptId,
                x.OccurrenceDeptId,
                x.ProcessNodeCode,
                x.RelatedObjectCode,
            })
            .ToListAsync();

        // 部门名称字典
        var allDeptIds = list.Select(x => x.ResponsibleDeptId)
            .Concat(list.Select(x => x.OccurrenceDeptId))
            .Distinct().ToList();
        var deptMap = await _deptRep.AsQueryable()
            .Where(d => allDeptIds.Contains(d.Id))
            .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() }),
            byScene = list
                .GroupBy(x => x.SceneCode)
                .Select(g => new { key = g.Key, count = g.Count() }),
            bySeverity = list
                .GroupBy(x => 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(),
                }),
            byProcess = list
                .Where(x => x.ProcessNodeCode != null)
                .GroupBy(x => x.ProcessNodeCode!)
                .Select(g => new
                {
                    key = g.Key,
                    nodeName = processDict.GetValueOrDefault(g.Key, g.Key),
                    count = g.Count(),
                }),
            byObject = list
                .Where(x => x.RelatedObjectCode != null)
                .GroupBy(x => 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)
    {
        var pendingStatuses = new[] { "NEW", "ASSIGNED", "IN_PROGRESS" };

        var list = await _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted)
            .Select(x => new { x.ResponsibleDeptId, x.Status, x.TimeoutFlag })
            .ToListAsync();

        var deptIds = list.Select(x => x.ResponsibleDeptId).Distinct().ToList();
        var deptMap = await _deptRep.AsQueryable()
            .Where(d => deptIds.Contains(d.Id))
            .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"),
                timeout    = g.Count(x => x.TimeoutFlag),
                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)
    {
        var from = DateTime.Today.AddDays(-Math.Clamp(days, 1, 90));

        var rows = await _rep.AsQueryable()
            .Where(x => x.TenantId == tenantId && x.FactoryId == factoryId && !x.IsDeleted && x.CreatedAt >= from)
            .Select(x => new
            {
                x.CreatedAt,
                x.ProcessNodeCode,
                x.RelatedObjectCode,
                x.OccurrenceDeptId,
                x.ResponsibleDeptId,
            })
            .ToListAsync();

        // 生成连续日期序列
        var dates = Enumerable.Range(0, (DateTime.Today - from).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
        Func<dynamic, string> keySelector = dim switch
        {
            "process"  => r => r.ProcessNodeCode ?? "未设置",
            "occDept"  => r => r.OccurrenceDeptId.ToString(),
            "respDept" => r => r.ResponsibleDeptId.ToString(),
            _          => r => r.RelatedObjectCode ?? "未设置",   // 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();
            var depts = await _deptRep.AsQueryable()
                .Where(d => ids.Contains(d.Id))
                .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);
        var ordered = mode switch
        {
            "high-priority" => q.OrderBy(x => x.PriorityScore, OrderByType.Desc),
            "timeout"       => q.Where(x => x.TimeoutFlag).OrderBy(x => x.SlaDeadline),
            _               => q.OrderBy(x => x.CreatedAt, OrderByType.Desc),
        };
        return await ordered.Take(20).ToListAsync();
    }
}