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

// 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 Switch (`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)]"

function Option({ label, children }: { label: string; children: (id: string) => ReactNode }) {
  const id = useId()
  return (
    <div className="flex items-center gap-2">
      {children(id)}
      <Label htmlFor={id} className={optionLabel}>{label}</Label>
    </div>
  )
}

// Representative-page layout (Storybook presentation only): 5 equal columns on PC (iframe width 1000px and up), shrinking
// to fit below that (150px minimum per 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 or stretched track.
function StateGrid({ states }: { states: BoardState[] }) {
  return (
    <div className="grid items-start gap-6 [grid-template-columns:repeat(auto-fill,minmax(min(100%,150px),1fr))] min-[1000px]:grid-cols-5">
      {states.map((state) => (
        <StateBoard key={state.id} min={10000} states={[state]} />
      ))}
    </div>
  )
}

const meta = {
  title: "Components/Form/Switch",
  component: Switch,
  parameters: {
    layout: "padded",
    docs: {
      description: {
        component:
          "현재 HM 규격: 트랙 36×20, 썸 16, On은 state-active, Off는 stroke 색. ui-viz에는 Switch 규격이 없어 참고만 했습니다. Radix Switch의 role=switch, 키보드, 접근성과 shadcn 기본 transition을 유지합니다.",
      },
    },
  },
} satisfies Meta<typeof Switch>
export default meta
type Story = StoryObj<typeof meta>

export const All: Story = {
  name: "Switch",
  parameters: { layout: "fullscreen", controls: { disable: true } },
  render: () => (
    <StoryPage>
      <StoryPageHeader title="Switch" />
      <StorySection title="States">
        <StateGrid
          states={[
            { id: "off", label: "Off", children: <Option label="Option">{(id) => <Switch id={id} />}</Option> },
            { id: "on", label: "On", children: <Option label="Option">{(id) => <Switch id={id} defaultChecked />}</Option> },
            {
              id: "hover",
              label: "Hover",
              // data-sb-hover pins :hover (Storybook only, .storybook/pseudo-states.ts).
              children: (
                <div className="grid gap-3">
                  <Option label="Off">{(id) => <Switch id={id} data-sb-hover="" />}</Option>
                  <Option label="On">{(id) => <Switch id={id} defaultChecked data-sb-hover="" />}</Option>
                </div>
              ),
            },
            { id: "focus", label: "Focus", children: <Option label="Option">{(id) => <Switch id={id} />}</Option> },
            {
              id: "disabled",
              label: "Disabled",
              children: (
                <div className="grid gap-3">
                  <Option label="Off">{(id) => <Switch id={id} disabled />}</Option>
                  <Option label="On">{(id) => <Switch id={id} disabled defaultChecked />}</Option>
                </div>
              ),
            },
          ]}
        />
      </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="switch"]')?.focus({ preventScroll: true })
  },
}

export const Off: Story = { tags: ["verification"], render: () => <Option label="Option">{(id) => <Switch id={id} />}</Option> }
export const On: Story = { tags: ["verification"], render: () => <Option label="Option">{(id) => <Switch id={id} defaultChecked />}</Option> }
export const Disabled: Story = { tags: ["verification"], render: () => <Option label="Option">{(id) => <Switch id={id} disabled defaultChecked />}</Option> }