import { useMemo, useState } from "react"
import type { Meta, StoryObj } from "@storybook/react-vite"
import {
  Badge,
  Button,
  Combobox,
  DataTable,
  DataTableColumnHeader,
  DataTableViewOptions,
  DatePicker,
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
  FilterBar,
  FilterBarActions,
  FilterBarSearch,
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
  dataTableSelectColumn,
  toast,
  useDataTable,
  type DataTableColumnDef,
} from "@hm-design/ui"
import { MoreHorizontalIcon } from "lucide-react"
import { STORY_KICKER, StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"
import { formatDate, sameDay, sampleUsers, statusLabel, type SampleUser } from "./sample-users"

// Data Table is a pattern: the HM Table primitive driven by TanStack Table v9 (useDataTable). Columns and data stay referentially stable
// (module scope / useMemo). Row actions use the HM Dropdown Menu and report through Sonner `toast` (Story composition only).

const statusBadge = (status: SampleUser["status"]) => (
  <Badge variant={status === "active" ? "default" : status === "pending" ? "secondary" : "outline"}>{statusLabel[status]}</Badge>
)

const columnLabels = { name: "이름", department: "부서", status: "상태", createdAt: "등록일" }

const columns: DataTableColumnDef<SampleUser>[] = [
  dataTableSelectColumn<SampleUser>(),
  { accessorKey: "name", header: ({ column }) => <DataTableColumnHeader column={column} title="이름" /> },
  { accessorKey: "department", header: "부서" },
  {
    accessorKey: "status",
    header: "상태",
    cell: ({ row }) => statusBadge(row.original.status),
    filterFn: "equalsString",
    enableSorting: false,
  },
  {
    accessorKey: "createdAt",
    header: ({ column }) => <DataTableColumnHeader column={column} title="등록일" />,
    cell: ({ row }) => formatDate(row.original.createdAt),
    filterFn: (row, columnId, value: Date) => sameDay(row.getValue<string>(columnId), value),
  },
  {
    id: "actions",
    enableHiding: false,
    cell: ({ row }) => (
      <DropdownMenu>
        <DropdownMenuTrigger asChild>
          <Button type="button" variant="primary" appearance="outline" size="icon-sm" aria-label={`${row.original.name} 작업`}>
            <MoreHorizontalIcon />
          </Button>
        </DropdownMenuTrigger>
        <DropdownMenuContent align="end">
          <DropdownMenuItem onSelect={() => toast(`${row.original.name} 보기`)}>보기</DropdownMenuItem>
          <DropdownMenuItem onSelect={() => toast(`${row.original.name} 수정`)}>수정</DropdownMenuItem>
          <DropdownMenuSeparator />
          <DropdownMenuItem variant="destructive" onSelect={() => toast.error(`${row.original.name} 삭제 요청`)}>
            삭제
          </DropdownMenuItem>
        </DropdownMenuContent>
      </DropdownMenu>
    ),
  },
]

function Basic({ data = sampleUsers, loading }: { data?: SampleUser[]; loading?: boolean }) {
  const table = useDataTable({ columns, data, getRowId: (row) => row.id })
  return (
    <div className="grid w-full gap-3">
      <div className="flex justify-end">
        <DataTableViewOptions table={table} labels={columnLabels} />
      </div>
      <DataTable table={table} loading={loading} />
    </div>
  )
}

const statusOptions = [
  { value: "active", label: "활성" },
  { value: "pending", label: "대기" },
  { value: "inactive", label: "비활성" },
]
const departmentOptions = [...new Set(sampleUsers.map((u) => u.department))].map((d) => ({ value: d, label: d }))

// Filter Bar → filter state → Data Table: search is the TanStack global filter, status / date are column filters.
function WithFilterBar() {
  const data = useMemo(() => sampleUsers, [])
  const table = useDataTable({ columns, data, getRowId: (row) => row.id })
  const [search, setSearch] = useState("")
  const [status, setStatus] = useState("all")
  const [date, setDate] = useState<Date | undefined>()
  const [department, setDepartment] = useState<string | undefined>()

  const setSearchValue = (value: string) => {
    setSearch(value)
    table.setGlobalFilter(value || undefined)
  }
  const reset = () => {
    setSearch("")
    setStatus("all")
    setDate(undefined)
    setDepartment(undefined)
    table.resetGlobalFilter(true)
    table.resetColumnFilters(true)
  }

  return (
    <div className="grid w-full gap-4">
      <FilterBar>
        <FilterBarSearch value={search} onValueChange={setSearchValue} placeholder="이름·부서 검색" />
        <Select
          value={status}
          onValueChange={(value) => {
            setStatus(value)
            table.getColumn("status")?.setFilterValue(value === "all" ? undefined : value)
          }}
        >
          <SelectTrigger size="medium" aria-label="상태">
            <SelectValue placeholder="상태" />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="all">전체 상태</SelectItem>
            {statusOptions.map((o) => (
              <SelectItem key={o.value} value={o.value}>
                {o.label}
              </SelectItem>
            ))}
          </SelectContent>
        </Select>
        <Combobox
          controlled
          size="medium"
          aria-label="부서"
          options={departmentOptions}
          value={department}
          placeholder="부서"
          onValueChange={(value) => {
            setDepartment(value)
            setSearchValue(value)
          }}
        />
        <DatePicker
          controlled
          size="medium"
          aria-label="등록일"
          placeholder="등록일"
          value={date}
          onValueChange={(value) => {
            setDate(value)
            table.getColumn("createdAt")?.setFilterValue(value)
          }}
        />
        <FilterBarActions>
          <Button type="button" variant="cancel" appearance="outline" onClick={reset}>
            초기화
          </Button>
          <DataTableViewOptions table={table} labels={columnLabels} />
        </FilterBarActions>
      </FilterBar>
      <DataTable table={table} emptyMessage="조건에 맞는 사용자가 없습니다." />
    </div>
  )
}

const meta = { title: "Patterns/Data/Data Table", parameters: { layout: "padded", controls: { disable: true } } } satisfies Meta
export default meta
type Story = StoryObj<typeof meta>

// Representative Story: selection (mixed header), sorting, column visibility, row actions and pagination with page size.
export const All: Story = {
  name: "Data Table",
  parameters: { layout: "fullscreen" },
  render: () => (
    <StoryPage>
      <StoryPageHeader
        kicker={STORY_KICKER.patterns}
        title="Data Table"
        description="업무 목록을 표로 보여 주는 Pattern입니다. 선택·정렬·열 표시·페이지 이동을 하나의 표에서 다룹니다."
      />
      <StorySection title="Overview" description="행 선택(헤더 혼합 상태), 정렬, 열 표시, 행 작업, 페이지 크기와 페이지 이동을 실제로 조작합니다.">
        <Basic />
      </StorySection>
    </StoryPage>
  ),
}

// Combination Story: Filter Bar (search, status, department, date, reset) filtering the Data Table rows.
export const WithFilterBarStory: Story = { tags: ["verification"], name: "With Filter Bar", render: () => <WithFilterBar /> }

export const Loading: Story = { tags: ["verification"], render: () => <Basic loading /> }
export const Empty: Story = { tags: ["verification"], render: () => <Basic data={[]} /> }