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

// AspectRatio is a layout primitive: it keeps the ratio and nothing else. The image styling (object-fit, radius) in these Stories is
// the consumer's composition on the child, not part of AspectRatio. Images are inline data URIs (no network). The Card example only
// shows how a consumer can compose it; AspectRatio does not depend on Card.

const svg = (label: string, fill: string) =>
  "data:image/svg+xml;utf8," +
  encodeURIComponent(
    `<svg xmlns="http://www.w3.org/2000/svg" width="480" height="320" viewBox="0 0 480 320"><rect width="480" height="320" fill="${fill}"/><circle cx="360" cy="90" r="40" fill="#bddfd4"/><path d="M0 320 L150 150 L260 260 L340 190 L480 320 Z" fill="#205241"/><text x="24" y="44" font-family="sans-serif" font-size="26" fill="#ffffff">${label}</text></svg>`
  )

function Image({ ratio, label }: { ratio: number; label: string }) {
  return (
    <div style={{ width: "100%", maxWidth: 320 }}>
      <AspectRatio ratio={ratio} data-testid={`ratio-${label}`}>
        <img src={svg(label, "#266651")} alt={`${label} 예시 이미지`} className="size-full rounded-md object-cover" />
      </AspectRatio>
    </div>
  )
}

function Placeholder() {
  return (
    <div style={{ width: "100%", maxWidth: 320 }}>
      <AspectRatio ratio={16 / 9} data-testid="ratio-video">
        <div className="grid size-full place-items-center rounded-md border bg-muted text-sm text-muted-foreground">영상 영역 16:9</div>
      </AspectRatio>
    </div>
  )
}

function InCard() {
  return (
    <Card style={{ width: "100%", maxWidth: 320 }}>
      <CardContent>
        <AspectRatio ratio={4 / 3} data-testid="ratio-card">
          <img src={svg("Card 4:3", "#3e3523")} alt="카드 안 4:3 이미지" className="size-full rounded-md object-cover" />
        </AspectRatio>
      </CardContent>
    </Card>
  )
}

const sections = [
  { id: "r169", label: "16:9", node: <Image ratio={16 / 9} label="16:9" /> },
  { id: "r43", label: "4:3", node: <Image ratio={4 / 3} label="4:3" /> },
  { id: "r11", label: "1:1", node: <Image ratio={1} label="1:1" /> },
  { id: "video", label: "Video", node: <Placeholder /> },
  { id: "card", label: "Card", node: <InCard /> },
]

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

// Representative-page layout (Storybook presentation only): equal columns on PC (iframe width 1000px and up), fewer below that
// (200px minimum). Each specimen sits in its own single-column StateBoard (min larger than any column), so every subtitle and divider
// has the width of its column; a section with fewer specimens than columns leaves the remaining columns empty.
// The Card example spans two columns (about its previous width); the ratio boxes fill their column by design.
const specimenColumns = {
  2: "min-[1000px]:grid-cols-2",
  3: "min-[1000px]:grid-cols-3",
  4: "min-[1000px]:grid-cols-4",
} as const

function SpecimenGrid({ ids, columns, spans = {} }: { ids: string[]; columns: 2 | 3 | 4; spans?: Record<string, 2> }) {
  return (
    <div className={`grid items-start gap-6 [grid-template-columns:repeat(auto-fill,minmax(min(100%,200px),1fr))] ${specimenColumns[columns]}`}>
      {ids.map((id) => {
        const s = sections.find((section) => section.id === id)!
        return (
          <div key={id} className={spans[id] ? "min-[1000px]:col-span-2" : undefined}>
            <StateBoard min={10000} states={[{ id: s.id, label: s.label, children: s.node }]} />
          </div>
        )
      })}
    </div>
  )
}

// Representative Story: the common Story page; the sections group the same specimens.
// Representative Story: Overview (16:9) is merged into Variants (16:9, 4:3, 1:1, Video), 4 columns on PC; Card stays under Usage.
export const All: Story = {
  name: "Aspect Ratio",
  parameters: { layout: "fullscreen", controls: { disable: true } },
  render: () => (
    <StoryPage>
      <StoryPageHeader title="Aspect Ratio" />
      <StorySection title="Variants">
        <SpecimenGrid ids={["r169", "r43", "r11", "video"]} columns={4} />
      </StorySection>
      <StorySection title="Usage">
        <SpecimenGrid ids={["card"]} columns={4} spans={{ card: 2 }} />
      </StorySection>
    </StoryPage>
  ),
}

export const Wide: Story = { tags: ["verification"], name: "16:9", render: () => <Image ratio={16 / 9} label="16:9" /> }
export const Square: Story = { tags: ["verification"], name: "1:1", render: () => <Image ratio={1} label="1:1" /> }