"use client"

import * as React from "react"
import { useRouter, useSearchParams } from "next/navigation"
import { Button } from "@/components/ui/button"
import { PanelLeftClose, PanelLeftOpen } from "lucide-react"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Badge } from "@/components/ui/badge"
import { Skeleton } from "@/components/ui/skeleton"
import type {
  DataTableAdvancedFilterField,
  DataTableFilterField,
  DataTableRowAction,
} from "@/types/table"

import { useDataTable } from "@/hooks/use-data-table"
import { DataTable } from "@/components/data-table/data-table"
import { DataTableAdvancedToolbar } from "@/components/data-table/data-table-advanced-toolbar"
import { getEvaluationTargets, getEvaluationTargetsStats } from "../service"
import { cn } from "@/lib/utils"
import { useTablePresets } from "@/components/data-table/use-table-presets"
import { TablePresetManager } from "@/components/data-table/data-table-preset"
import { useMemo } from "react"
import { getEvaluationTargetsColumns } from "./evaluation-targets-columns"
import { EvaluationTargetsTableToolbarActions } from "./evaluation-targets-toolbar-actions"
import { EvaluationTargetFilterSheet } from "./evaluation-targets-filter-sheet"
import { EvaluationTargetWithDepartments } from "@/db/schema"
import { EditEvaluationTargetSheet } from "./update-evaluation-target"

interface EvaluationTargetsTableProps {
  promises: Promise<[Awaited<ReturnType<typeof getEvaluationTargets>>]>
  evaluationYear: number
  className?: string
}

// 통계 카드 컴포넌트 (클라이언트 컴포넌트용)
function EvaluationTargetsStats({ evaluationYear }: { evaluationYear: number }) {
  const [stats, setStats] = React.useState<any>(null)
  const [isLoading, setIsLoading] = React.useState(true)
  const [error, setError] = React.useState<string | null>(null)

  React.useEffect(() => {
    let isMounted = true

    async function fetchStats() {
      try {
        setIsLoading(true)
        setError(null)
        const statsData = await getEvaluationTargetsStats(evaluationYear)

        if (isMounted) {
          setStats(statsData)
        }
      } catch (err) {
        if (isMounted) {
          setError(err instanceof Error ? err.message : 'Failed to fetch stats')
          console.error('Error fetching evaluation targets stats:', err)
        }
      } finally {
        if (isMounted) {
          setIsLoading(false)
        }
      }
    }

    fetchStats()

    return () => {
      isMounted = false
    }
  }, [])

  if (isLoading) {
    return (
      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4 mb-6">
        {Array.from({ length: 4 }).map((_, i) => (
          <Card key={i}>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <Skeleton className="h-4 w-20" />
            </CardHeader>
            <CardContent>
              <Skeleton className="h-8 w-16" />
            </CardContent>
          </Card>
        ))}
      </div>
    )
  }

  if (error) {
    return (
      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4 mb-6">
        <Card className="col-span-full">
          <CardContent className="pt-6">
            <div className="text-center text-sm text-muted-foreground">
              통계 데이터를 불러올 수 없습니다: {error}
            </div>
          </CardContent>
        </Card>
      </div>
    )
  }

  if (!stats) {
    return (
      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4 mb-6">
        <Card className="col-span-full">
          <CardContent className="pt-6">
            <div className="text-center text-sm text-muted-foreground">
              통계 데이터가 없습니다.
            </div>
          </CardContent>
        </Card>
      </div>
    )
  }

  const totalTargets = stats.total || 0
  const pendingTargets = stats.pending || 0
  const confirmedTargets = stats.confirmed || 0
  const excludedTargets = stats.excluded || 0
  const consensusRate = totalTargets > 0 ? Math.round(((stats.consensusTrue || 0) / totalTargets) * 100) : 0

  return (
    <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4 mb-6">
      {/* 총 평가 대상 */}
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-sm font-medium">총 평가 대상</CardTitle>
          <Badge variant="outline">{evaluationYear}년</Badge>
        </CardHeader>
        <CardContent>
          <div className="text-2xl font-bold">{totalTargets.toLocaleString()}</div>
          <div className="text-xs text-muted-foreground mt-1">
            해양 {stats.oceanDivision || 0}개 | 조선 {stats.shipyardDivision || 0}개
          </div>
        </CardContent>
      </Card>

      {/* 검토 중 */}
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-sm font-medium">검토 중</CardTitle>
          <Badge variant="secondary">대기</Badge>
        </CardHeader>
        <CardContent>
          <div className="text-2xl font-bold text-orange-600">{pendingTargets.toLocaleString()}</div>
          <div className="text-xs text-muted-foreground mt-1">
            {totalTargets > 0 ? Math.round((pendingTargets / totalTargets) * 100) : 0}% of total
          </div>
        </CardContent>
      </Card>

      {/* 확정 */}
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-sm font-medium">확정</CardTitle>
          <Badge variant="default" className="bg-green-600">완료</Badge>
        </CardHeader>
        <CardContent>
          <div className="text-2xl font-bold text-green-600">{confirmedTargets.toLocaleString()}</div>
          <div className="text-xs text-muted-foreground mt-1">
            {totalTargets > 0 ? Math.round((confirmedTargets / totalTargets) * 100) : 0}% of total
          </div>
        </CardContent>
      </Card>

      {/* 의견 일치율 */}
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-sm font-medium">의견 일치율</CardTitle>
          <Badge variant={consensusRate >= 80 ? "default" : consensusRate >= 60 ? "secondary" : "destructive"}>
            {consensusRate}%
          </Badge>
        </CardHeader>
        <CardContent>
          <div className="text-2xl font-bold">{consensusRate}%</div>
          <div className="text-xs text-muted-foreground mt-1">
            일치 {stats.consensusTrue || 0}개 | 불일치 {stats.consensusFalse || 0}개
          </div>
        </CardContent>
      </Card>
    </div>
  )
}

export function EvaluationTargetsTable({ promises, evaluationYear, className }: EvaluationTargetsTableProps) {
  const [rowAction, setRowAction] = React.useState<DataTableRowAction<EvaluationTargetWithDepartments> | null>(null)
  const [isFilterPanelOpen, setIsFilterPanelOpen] = React.useState(false)
  const router = useRouter()
  const searchParams = useSearchParams()

  const containerRef = React.useRef<HTMLDivElement>(null)
  const [containerTop, setContainerTop] = React.useState(0)

  // ✅ 스크롤 이벤트 throttling으로 성능 최적화
  const updateContainerBounds = React.useCallback(() => {
    if (containerRef.current) {
      const rect = containerRef.current.getBoundingClientRect()
      const newTop = rect.top

      // ✅ 값이 실제로 변경될 때만 상태 업데이트
      setContainerTop(prevTop => {
        if (Math.abs(prevTop - newTop) > 1) { // 1px 이상 차이날 때만 업데이트
          return newTop
        }
        return prevTop
      })
    }
  }, [])

  // ✅ throttle 함수 추가
  const throttledUpdateBounds = React.useCallback(() => {
    let timeoutId: NodeJS.Timeout
    return () => {
      clearTimeout(timeoutId)
      timeoutId = setTimeout(updateContainerBounds, 16) // ~60fps
    }
  }, [updateContainerBounds])

  React.useEffect(() => {
    updateContainerBounds()

    const throttledHandler = throttledUpdateBounds()

    const handleResize = () => {
      updateContainerBounds()
    }

    window.addEventListener('resize', handleResize)
    window.addEventListener('scroll', throttledHandler) // ✅ throttled 함수 사용

    return () => {
      window.removeEventListener('resize', handleResize)
      window.removeEventListener('scroll', throttledHandler)
    }
  }, [updateContainerBounds, throttledUpdateBounds])

  const [promiseData] = React.use(promises)
  const tableData = promiseData

  console.log(tableData)

  const initialSettings = React.useMemo(() => ({
    page: parseInt(searchParams.get('page') || '1'),
    perPage: parseInt(searchParams.get('perPage') || '10'),
    sort: searchParams.get('sort') ? JSON.parse(searchParams.get('sort')!) : [{ id: "createdAt", desc: true }],
    filters: searchParams.get('filters') ? JSON.parse(searchParams.get('filters')!) : [],
    joinOperator: (searchParams.get('joinOperator') as "and" | "or") || "and",
    basicFilters: searchParams.get('basicFilters') ?
      JSON.parse(searchParams.get('basicFilters')!) : [],
    basicJoinOperator: (searchParams.get('basicJoinOperator') as "and" | "or") || "and",
    search: searchParams.get('search') || '',
    columnVisibility: {},
    columnOrder: [],
    pinnedColumns: { left: [], right: ["actions"] },
    groupBy: [],
    expandedRows: []
  }), [searchParams])

  const {
    presets,
    activePresetId,
    hasUnsavedChanges,
    isLoading: presetsLoading,
    createPreset,
    applyPreset,
    updatePreset,
    deletePreset,
    setDefaultPreset,
    renamePreset,
    updateClientState,
    getCurrentSettings,
  } = useTablePresets<EvaluationTargetWithDepartments>('evaluation-targets-table', initialSettings)

  const columns = React.useMemo(
    () => getEvaluationTargetsColumns({ setRowAction }),
    [setRowAction]
  )

  const filterFields: DataTableFilterField<EvaluationTargetWithDepartments>[] = [
    { id: "vendorCode", label: "벤더 코드" },
    { id: "vendorName", label: "벤더명" },
    { id: "status", label: "상태" },
  ]

  const advancedFilterFields: DataTableAdvancedFilterField<EvaluationTargetWithDepartments>[] = [
    { id: "evaluationYear", label: "평가년도", type: "number" },
    {
      id: "division", label: "구분", type: "select", options: [
        { label: "해양", value: "OCEAN" },
        { label: "조선", value: "SHIPYARD" },
      ]
    },
    { id: "vendorCode", label: "벤더 코드", type: "text" },
    { id: "vendorName", label: "벤더명", type: "text" },
    {
      id: "domesticForeign", label: "내외자", type: "select", options: [
        { label: "내자", value: "DOMESTIC" },
        { label: "외자", value: "FOREIGN" },
      ]
    },
    {
      id: "materialType", label: "자재구분", type: "select", options: [
        { label: "기자재", value: "EQUIPMENT" },
        { label: "벌크", value: "BULK" },
        { label: "기자재/벌크", value: "EQUIPMENT_BULK" },
      ]
    },
    {
      id: "status", label: "상태", type: "select", options: [
        { label: "검토 중", value: "PENDING" },
        { label: "확정", value: "CONFIRMED" },
        { label: "제외", value: "EXCLUDED" },
      ]
    },
    {
      id: "consensusStatus", label: "의견 일치", type: "select", options: [
        { label: "의견 일치", value: "true" },
        { label: "의견 불일치", value: "false" },
        { label: "검토 중", value: "null" },
      ]
    },
    { id: "adminComment", label: "관리자 의견", type: "text" },
    { id: "consolidatedComment", label: "종합 의견", type: "text" },
    { id: "confirmedAt", label: "확정일", type: "date" },
    { id: "createdAt", label: "생성일", type: "date" },
  ]

  const currentSettings = useMemo(() => {
    return getCurrentSettings()
  }, [getCurrentSettings])

  function getColKey<T>(c: ColumnDef<T>): string | undefined {
    if ("accessorKey" in c && c.accessorKey) return c.accessorKey as string
    if ("id" in c && c.id) return c.id as string
    return undefined
  }

  const initialState = useMemo(() => {
    return {
      sorting: initialSettings.sort.filter(s =>
        columns.some(c => getColKey(c) === s.id)),
      columnVisibility: currentSettings.columnVisibility,
      columnPinning: currentSettings.pinnedColumns,
    }
  }, [columns, currentSettings, initialSettings.sort])

  const { table } = useDataTable({
    data: tableData.data,
    columns,
    pageCount: tableData.pageCount,
    rowCount: tableData.total || tableData.data.length,
    filterFields,
    enablePinning: true,
    enableAdvancedFilter: true,
    initialState,
    getRowId: (originalRow) => String(originalRow.id),
    shallow: false,
    clearOnDefault: true,
  })

  const handleSearch = () => {
    setIsFilterPanelOpen(false)
  }

  const getActiveBasicFilterCount = () => {
    try {
      const basicFilters = searchParams.get('basicFilters')
      return basicFilters ? JSON.parse(basicFilters).length : 0
    } catch (e) {
      return 0
    }
  }

  const FILTER_PANEL_WIDTH = 400;

  return (
    <>
      {/* Filter Panel */}
      <div
        className={cn(
          "fixed left-0 bg-background border-r z-50 flex flex-col transition-all duration-300 ease-in-out overflow-hidden",
          isFilterPanelOpen ? "border-r shadow-lg" : "border-r-0"
        )}
        style={{
          width: isFilterPanelOpen ? `${FILTER_PANEL_WIDTH}px` : '0px',
          top: `${containerTop}px`,
          height: `calc(100vh - ${containerTop}px)`
        }}
      >
        <div className="h-full">
          <EvaluationTargetFilterSheet
            isOpen={isFilterPanelOpen}
            onClose={() => setIsFilterPanelOpen(false)}
            onSearch={handleSearch}
            isLoading={false}
          />
        </div>
      </div>

      {/* Main Content Container */}
      <div
        ref={containerRef}
        className={cn("relative w-full overflow-hidden", className)}
      >
        <div className="flex w-full h-full">
          <div
            className="flex flex-col min-w-0 overflow-hidden transition-all duration-300 ease-in-out"
            style={{
              width: isFilterPanelOpen ? `calc(100% - ${FILTER_PANEL_WIDTH}px)` : '100%',
              marginLeft: isFilterPanelOpen ? `${FILTER_PANEL_WIDTH}px` : '0px'
            }}
          >
            {/* Header Bar */}
            <div className="flex items-center justify-between p-4 bg-background shrink-0">
              <div className="flex items-center gap-3">
                <Button
                  variant="outline"
                  size="sm"
                  type='button'
                  onClick={() => setIsFilterPanelOpen(!isFilterPanelOpen)}
                  className="flex items-center shadow-sm"
                >
                  {isFilterPanelOpen ? <PanelLeftClose className="size-4" /> : <PanelLeftOpen className="size-4" />}
                  {getActiveBasicFilterCount() > 0 && (
                    <span className="ml-2 bg-primary text-primary-foreground rounded-full px-2 py-0.5 text-xs">
                      {getActiveBasicFilterCount()}
                    </span>
                  )}
                </Button>
              </div>

              <div className="text-sm text-muted-foreground">
                {tableData && (
                  <span>총 {tableData.total || tableData.data.length}건</span>
                )}
              </div>
            </div>

            {/* 통계 카드들 */}
            <div className="px-4">
              <EvaluationTargetsStats evaluationYear={evaluationYear} />
            </div>

            {/* Table Content Area */}
            <div className="flex-1 overflow-hidden" style={{ height: 'calc(100vh - 500px)' }}>
              <div className="h-full w-full">
                <DataTable table={table} className="h-full">
                  <DataTableAdvancedToolbar
                    table={table}
                    filterFields={advancedFilterFields}
                    shallow={false}
                  >
                    <div className="flex items-center gap-2">
                      <TablePresetManager<EvaluationTargetWithDepartments>
                        presets={presets}
                        activePresetId={activePresetId}
                        currentSettings={currentSettings}
                        hasUnsavedChanges={hasUnsavedChanges}
                        isLoading={presetsLoading}
                        onCreatePreset={createPreset}
                        onUpdatePreset={updatePreset}
                        onDeletePreset={deletePreset}
                        onApplyPreset={applyPreset}
                        onSetDefaultPreset={setDefaultPreset}
                        onRenamePreset={renamePreset}
                      />

                      <EvaluationTargetsTableToolbarActions table={table} />
                    </div>
                  </DataTableAdvancedToolbar>
                </DataTable>

                <EditEvaluationTargetSheet
                  open={rowAction?.type === "update"}
                  onOpenChange={() => setRowAction(null)}
                  evaluationTarget={rowAction?.row.original ?? null}
                />

              </div>
            </div>
          </div>
        </div>
      </div>
    </>
  )
}