import type { Meta, StoryObj } from "@storybook/react-vite"
import { Label, RadioGroup, RadioGroupItem } from "@hm-design/ui"
import type { CSSProperties } from "react"
import { StateBoard, type BoardState } from "@/components/story-board"
import { StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"

// Current HM Radio Group. ui-viz has no Radio spec, so it was reference only.

// Story-only Label color. The shared Label sets `color: var(--hm-label-text)` from an unlayered theme rule, so a utility
// like `text-foreground` loses to it; overriding the Label's own token on the element works. Option labels use the default
// text color; a Label next to a disabled item (`peer-disabled`) keeps the secondary color. State titles are untouched.
const optionLabel = "[--hm-label-text:var(--foreground)] peer-disabled:[--hm-label-text:var(--hm-sem-fg-secondary)]"

// Representative-page layout (Storybook presentation only): equal columns on PC (iframe width 1000px and up), shrinking to
// fit below that (`min` is the narrowest column). Each specimen sits in its own single-column StateBoard (min larger than
// any column), so StateBoard's auto-fill grid cannot leave an empty track. Full class names are listed so Tailwind sees them.
const specimenColumns = {
  2: "min-[1000px]:grid-cols-2",
  4: "min-[1000px]:grid-cols-4",
} as const

function SpecimenGrid({ states, columns, min = 220 }: { states: BoardState[]; columns: keyof typeof specimenColumns; min?: number }) {
  return (
    <div
      className={`grid items-start gap-6 [grid-template-columns:repeat(auto-fill,minmax(min(100%,var(--sb-col-min)),1fr))] ${specimenColumns[columns]}`}
      style={{ "--sb-col-min": `${min}px` } as CSSProperties}
    >
      {states.map((state) => (
        <StateBoard key={state.id} min={10000} states={[state]} />
      ))}
    </div>
  )
}

function Group({
  prefix,
  defaultValue = "a",
  disabled,
  disabledItem,
  invalid,
  orientation,
  hoverItem,
}: {
  prefix: string
  defaultValue?: string
  disabled?: boolean
  disabledItem?: string
  invalid?: boolean
  orientation?: "horizontal" | "vertical"
  // Pins :hover on one item with the Storybook-only data-sb-hover attribute (.storybook/pseudo-states.ts).
  hoverItem?: string
}) {
  return (
    <RadioGroup defaultValue={defaultValue} disabled={disabled} orientation={orientation} aria-label={prefix}>
      {["a", "b", "c"].map((v) => (
        <div key={v} className="flex items-center gap-2">
          <RadioGroupItem value={v} id={`${prefix}-${v}`} disabled={disabledItem === v} aria-invalid={invalid ? true : undefined} data-sb-hover={hoverItem === v ? "" : undefined} />
          <Label htmlFor={`${prefix}-${v}`} className={optionLabel}>Option {v.toUpperCase()}</Label>
        </div>
      ))}
    </RadioGroup>
  )
}

const meta = {
  title: "Components/Form/Radio Group",
  component: RadioGroup,
  parameters: {
    layout: "padded",
    docs: {
      description: {
        component:
          "현재 HM 규격: 18px 원, border 1px(stroke), Checked/Selected는 state-active 테두리 + 8px state-active dot, group gap 12(horizontal 16). Radix RadioGroup의 roving focus, 방향키 선택, ARIA를 유지합니다. ui-viz에는 Radio 규격이 없어 참고만 했습니다.",
      },
    },
  },
} satisfies Meta<typeof RadioGroup>
export default meta
type Story = StoryObj<typeof meta>

export const All: Story = {
  name: "Radio Group",
  parameters: { layout: "fullscreen", controls: { disable: true } },
  render: () => (
    <StoryPage>
      <StoryPageHeader title="Radio Group" />
      {/* Overview is merged into Variants: its Vertical example is the first Variants item. */}
      <StorySection title="Variants">
        <SpecimenGrid
          columns={2}
          min={320}
          states={[
            { id: "vertical", label: "Vertical", children: <Group prefix="v" defaultValue="b" /> },
            { id: "horizontal", label: "Horizontal", children: <Group prefix="h" orientation="horizontal" /> },
          ]}
        />
      </StorySection>
      <StorySection title="States">
        <SpecimenGrid
          columns={4}
          states={[
            { id: "hover", label: "Hover", children: <Group prefix="hv" defaultValue="" hoverItem="a" /> },
            { id: "focus", label: "Focus", children: <Group prefix="f" /> },
            { id: "disabled-item", label: "Disabled · 항목", children: <Group prefix="di" disabledItem="b" /> },
            { id: "disabled-group", label: "Disabled · 그룹", children: <Group prefix="dg" disabled /> },
          ]}
        />
      </StorySection>
      <StorySection title="Validation">
        {/* Same 4-column track as States, so the Error example keeps the width of one States column. */}
        <SpecimenGrid columns={4} states={[{ id: "error", label: "Error", children: <Group prefix="e" invalid /> }]} />
      </StorySection>
    </StoryPage>
  ),
  play: async ({ canvasElement }) => {
    // preventScroll: the page opens at its header, not at the States section.
    canvasElement.querySelector<HTMLButtonElement>('[data-overview-state="focus"] [role="radio"][data-state="checked"]')?.focus({ preventScroll: true })
  },
}

export const Vertical: Story = { tags: ["verification"], render: () => <Group prefix="sv" /> }
export const Horizontal: Story = { tags: ["verification"], render: () => <Group prefix="sh" orientation="horizontal" /> }
export const Disabled: Story = { tags: ["verification"], render: () => <Group prefix="sd" disabled /> }
export const Error: Story = { tags: ["verification"], render: () => <Group prefix="se" invalid /> }