import { useMemo, useState } from "react"
import type { Meta, StoryObj } from "@storybook/react-vite"
import {
  Card, CardContent, PageHeader, PageHeaderContent, PageHeaderTitle, PageHeaderDescription,
  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 "../list-screen.css"
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({ extended = true }: { extended?: boolean }) {
  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 apply = () => {
    table.setGlobalFilter(search || undefined)
    table.getColumn("status")?.setFilterValue(status === "all" ? undefined : status)
    table.getColumn("department")?.setFilterValue(department)
    table.getColumn("createdAt")?.setFilterValue(date)
  }
  const reset = () => {
    setSearch(""); setStatus("all"); setDate(undefined); setDepartment(undefined)
    table.resetGlobalFilter(true); table.resetColumnFilters(true)
  }
  return <div className="grid min-w-0 gap-4">
    <PageHeader><PageHeaderContent><PageHeaderTitle>사용자 목록</PageHeaderTitle><PageHeaderDescription>조건을 입력한 뒤 조회합니다.</PageHeaderDescription></PageHeaderContent></PageHeader>
    <Card className="min-w-0"><CardContent>
      <div className="grid min-w-0 gap-4">
        <div className="hm-data-table-tools">
          <form className="hm-data-table-search" onSubmit={event => { event.preventDefault(); apply() }}>
            <FilterBar className={extended ? "hm-list-search-extended" : "hm-list-search-basic"}>
              <Select value={status} onValueChange={setStatus}>
                <SelectTrigger size="medium" aria-label="상태"><SelectValue placeholder="상태" /></SelectTrigger>
                <SelectContent><SelectItem value="all">전체 상태</SelectItem>{statusOptions.map(option => <SelectItem key={option.value} value={option.value}>{option.label}</SelectItem>)}</SelectContent>
              </Select>
              {extended && <><Combobox controlled size="medium" aria-label="부서" options={departmentOptions} value={department} placeholder="부서" onValueChange={setDepartment} />
                <DatePicker controlled size="medium" aria-label="등록일" placeholder="등록일" value={date} onValueChange={setDate} /></>}
              <FilterBarSearch value={search} onValueChange={setSearch} placeholder="이름·부서 검색" />
              <FilterBarActions><Button type="submit" variant="primary" appearance="solid">조회</Button><Button type="button" variant="cancel" appearance="outline" onClick={reset}>초기화</Button></FilterBarActions>
            </FilterBar>
          </form>
          <div className="hm-data-table-view-options"><DataTableViewOptions table={table} labels={columnLabels} /></div>
        </div>
        <DataTable table={table} emptyMessage="조건에 맞는 사용자가 없습니다." />
      </div>
    </CardContent></Card>
  </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>
      <StorySection title="기본 목록 검색" description="조건·검색어·조회·초기화를 8px 간격으로 가운데 정렬합니다. 공간이 충분하면 열 버튼은 같은 행 우측, 부족할 때만 다음 행에 배치합니다. 제목은 Card 밖에 배치합니다."><WithFilterBar extended={false} /></StorySection>
      <StorySection title="추가 조건 목록 검색" description="부서·등록일을 제공하는 구성은 입력값과 관계없이 왼쪽 정렬합니다. 열 버튼은 공간이 충분하면 같은 행 우측에 배치하며 모바일 버튼 행은 우측 정렬합니다."><WithFilterBar /></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={[]} /> }