import type { Meta, StoryObj } from "@storybook/react-vite"
import { Card, CardContent, CardHeader, Skeleton } from "@hm-design/ui"
import { StateBoard } from "@/components/story-board"
import { STORY_KICKER, StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"

// Skeleton is a visual placeholder; size and shape come from `className` (layout classes here are Story composition).
// There is no data fetching. The representative Story shows text lines, an avatar, and a card / list loading composition.

function TextLines() {
  return (
    <div className="grid gap-2">
      <Skeleton className="h-4 w-3/4" />
      <Skeleton className="h-4 w-full" />
      <Skeleton className="h-4 w-1/2" />
    </div>
  )
}

function AvatarRow() {
  return (
    <div className="flex items-center gap-3">
      <Skeleton className="size-10 rounded-full" />
      <div className="grid flex-1 gap-2">
        <Skeleton className="h-4 w-1/3" />
        <Skeleton className="h-3 w-2/3" />
      </div>
    </div>
  )
}

function CardLoading() {
  return (
    <Card>
      <CardHeader>
        <Skeleton className="h-5 w-1/2" />
      </CardHeader>
      <CardContent className="grid gap-3">
        <Skeleton className="h-24 w-full" />
        <AvatarRow />
        <AvatarRow />
      </CardContent>
    </Card>
  )
}

const sections = [
  { id: "text", label: "Text", node: <TextLines /> },
  { id: "avatar", label: "Avatar + text", node: <AvatarRow /> },
  { id: "card", label: "Card / list loading", node: <CardLoading /> },
]

const meta = { title: "Components/Data & Display/Skeleton", component: Skeleton, parameters: { layout: "padded" } } satisfies Meta<typeof Skeleton>
export default meta
type Story = StoryObj<typeof meta>

const board = (...ids: string[]) => (
  <StateBoard min={320} states={sections.filter((s) => ids.includes(s.id)).map((s) => ({ id: s.id, label: s.label, children: s.node }))} />
)

// Representative Story: the common Story page; the sections group the same specimens.
export const All: Story = {
  name: "Skeleton",
  parameters: { layout: "fullscreen", controls: { disable: true } },
  render: () => (
    <StoryPage>
      <StoryPageHeader
        kicker={STORY_KICKER.components}
        title="Skeleton"
        description="콘텐츠를 불러오는 동안 자리를 표시하는 placeholder입니다. 크기와 모양은 className으로 정합니다."
      />
      <StorySection title="Overview">{board("text")}</StorySection>
      <StorySection title="Usage" description="Avatar 행과 카드·목록 로딩 조합입니다.">{board("avatar", "card")}</StorySection>
    </StoryPage>
  ),
}

export const Text: Story = { tags: ["verification"], render: () => <TextLines /> }
export const CardList: Story = { tags: ["verification"], name: "Card List", render: () => <CardLoading /> }