import { Fragment, useState, type CSSProperties, type MouseEvent, type ReactNode } from "react"
import type { Meta, StoryObj } from "@storybook/react-vite"
// LNBProfile's default accessible name includes the visible name and description; explicit labels must preserve them.
import { ChartColumnIcon, LayoutGridIcon, ListChecksIcon, SettingsIcon, type LucideIcon } from "lucide-react"
import {
  GNB,
  GNBBrand,
  GNBMobileMenu,
  GNBNav,
  GNBUser,
  GNBUtilities,
  Avatar,
  AvatarFallback,
  AvatarImage,
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
  LNB,
  LNBBrand,
  LNBGroup,
  LNBItem,
  LNBNav,
  LNBProfile,
  LNBMobileHeader,
  LNBMobileBrand,
  LNBMobileGroup,
  LNBMobileLink,
  LNBMobileMenu,
} from "@hm-design/ui"
import { StateBoard } from "@/components/story-board"
import { STORY_KICKER, StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"

// LNB is a composition pattern. Layout visual reference is the ui-viz LNB (272px green column, 18/700 items, Beige current item joined
// to the content, Black 10% hover, Black 8% open group). The menu data and the current location are local sample data for this Story
// (no router). The content next to the column is a positioned surface with `--hm-lnb-join` rounded left corners: the LNB Mode page
// owns it, here it only shows the connection. The column is desktop only (hidden below 1024px).

const testLogo =
  "data:image/svg+xml;utf8," +
  encodeURIComponent('<svg xmlns="http://www.w3.org/2000/svg" width="120" height="32"><rect width="120" height="32" rx="4" fill="#fff" fill-opacity=".9"/><text x="60" y="21" font-size="13" font-weight="700" text-anchor="middle" fill="#123328">TEST LOGO</text></svg>')

const photo =
  "data:image/svg+xml;utf8," +
  encodeURIComponent('<svg xmlns="http://www.w3.org/2000/svg" width="80" height="80"><rect width="80" height="80" fill="#266651"/><circle cx="40" cy="31" r="14" fill="#bddfd4"/><rect x="14" y="50" width="52" height="40" rx="22" fill="#bddfd4"/></svg>')
// An address that cannot load, so the Radix fallback shows.
const brokenPhoto = "data:image/png;base64,broken"

const profileData = {
  name: "김한맥",
  description: "프로젝트 관리자",
  photo,
  fallback: "김",
}

const profileActions: { label: string; destructive?: boolean }[] = [
  { label: "프로필 설정" },
  { label: "로그아웃", destructive: true },
]

function ProfileAvatar() {
  return (
    <Avatar>
      <AvatarImage src={profileData.photo} alt="" />
      <AvatarFallback>{profileData.fallback}</AvatarFallback>
    </Avatar>
  )
}

function ProfileMenu({ trigger, side = "bottom", align = "start", modal, matchTrigger = false, defaultOpen = false }: { trigger: ReactNode; side?: "top" | "right" | "bottom" | "left"; align?: "start" | "center" | "end"; modal?: boolean; matchTrigger?: boolean; defaultOpen?: boolean }) {
  return (
    <DropdownMenu modal={modal} defaultOpen={defaultOpen}>
      <DropdownMenuTrigger asChild>{trigger}</DropdownMenuTrigger>
      <DropdownMenuContent side={side} align={align} className={matchTrigger ? "min-w-(--radix-dropdown-menu-trigger-width)" : undefined}>
        <DropdownMenuLabel>{profileData.name}</DropdownMenuLabel>
        {profileActions.map((action) => (
          <Fragment key={action.label}>
            {action.destructive ? <DropdownMenuSeparator /> : null}
            <DropdownMenuItem variant={action.destructive ? "destructive" : "default"}>{action.label}</DropdownMenuItem>
          </Fragment>
        ))}
      </DropdownMenuContent>
    </DropdownMenu>
  )
}

const shellStyle: CSSProperties = {
  display: "grid",
  gridTemplateColumns: "var(--hm-lnb-width) minmax(0, 1fr)",
  minHeight: 460,
  background: "var(--hm-lnb-background-end)",
}
const contentStyle: CSSProperties = {
  position: "relative",
  // Keep connected content in the second track when the first-track LNB becomes display:none at <=1023px.
  // Without explicit placement, Grid auto-placement moves it into the now-empty 0px LNB track.
  gridColumn: 2,
  minWidth: 0,
  padding: 34,
  borderRadius: "var(--hm-lnb-join) 0 0 var(--hm-lnb-join)",
  background: "var(--hm-sem-bg-content)",
}

type Child = { id: string; label: string }
type LocalNode = { id: string; label: string; icon?: LucideIcon; children?: LocalNode[] }

function Menu({
  initial = "overview",
  groupOpen = true,
  logo,
  eyebrow = "한맥 업무 시스템",
  brand = "프로젝트 대시보드",
  longLabels,
  many,
  height,
  profile = true,
}: {
  initial?: string | null
  groupOpen?: boolean
  logo?: string
  eyebrow?: string
  /** `null`: no LNBBrand (a GNB above carries the service identity). */
  brand?: string | null
  longLabels?: boolean
  many?: boolean
  height?: number
  /** Story composition only: GNB + LNB gives profile ownership to the GNB. */
  profile?: boolean
}) {
  const [current, setCurrent] = useState<string | null>(initial)
  const [open, setOpen] = useState(groupOpen)
  const go = (id: string) => (event: MouseEvent) => {
    event.preventDefault()
    setCurrent(id)
  }
  const children: Child[] = longLabels
    ? [
        { id: "tasks/list", label: "전사 프로젝트 포트폴리오의 진행 현황 목록" },
        { id: "tasks/board", label: "업무 보드" },
      ]
    : [
        { id: "tasks/list", label: "메뉴 2-1" },
        { id: "tasks/board", label: "메뉴 2-2" },
      ]
  const extra = many ? Array.from({ length: 8 }, (_, i) => ({ id: `extra-${i}`, label: `추가 메뉴 ${i + 1}` })) : []
  return (
    <div style={{ ...shellStyle, height }}>
      <LNB>
        {brand !== null ? (
          <LNBBrand>
            {logo ? <img src={logo} alt="" /> : null}
            <span>
              {eyebrow ? <small>{eyebrow}</small> : null}
              <strong>{brand}</strong>
            </span>
          </LNBBrand>
        ) : null}
        <LNBNav aria-label="서비스 메뉴">
          <LNBItem href="#overview" active={current === "overview"} onClick={go("overview")}>
            <LayoutGridIcon aria-hidden="true" />
            {longLabels ? "프로젝트 현황과 전체 일정을 한눈에 보는 개요" : "메뉴 1"}
          </LNBItem>
          <LNBGroup label={longLabels ? "업무 관리와 진행 상황 점검" : "메뉴 2"} current={Boolean(current?.startsWith("tasks/"))} open={open} onOpenChange={setOpen}>
            {children.map((child) => (
              <LNBItem key={child.id} href={`#${child.id}`} active={current === child.id} onClick={go(child.id)}>
                {child.label}
              </LNBItem>
            ))}
          </LNBGroup>
          <LNBItem href="#reports" active={current === "reports"} onClick={go("reports")}>
            <ChartColumnIcon aria-hidden="true" />
            메뉴 3
          </LNBItem>
          <LNBItem href="#settings" active={current === "settings"} onClick={go("settings")}>
            <SettingsIcon aria-hidden="true" />
            메뉴 4
          </LNBItem>
          {extra.map((item) => (
            <LNBItem key={item.id} href={`#${item.id}`} active={current === item.id} onClick={go(item.id)}>
              <ListChecksIcon aria-hidden="true" />
              {item.label}
            </LNBItem>
          ))}
        </LNBNav>
        {profile ? (
          <ProfileMenu
            side="right"
            align="end"
            matchTrigger
            trigger={
              <LNBProfile name={longLabels ? "김한맥 (한맥기술 인프라사업본부 스마트시설팀)" : profileData.name} description={longLabels ? "통합 시스템 관리자 · 인프라사업본부" : profileData.description}>
                <Avatar>
                  <AvatarImage src={longLabels ? brokenPhoto : profileData.photo} alt="" />
                  <AvatarFallback>{profileData.fallback}</AvatarFallback>
                </Avatar>
              </LNBProfile>
            }
          />
        ) : null}
      </LNB>
      <div style={contentStyle}>
        <h2 className="text-lg font-bold">연결된 콘텐츠</h2>
        <p className="text-sm text-muted-foreground" data-current-menu>
          선택: {current ?? "없음"}
        </p>
      </div>
    </div>
  )
}

// 3-depth: an `LNBGroup` nested in a group (no depth prop). The selected link is `active`, every group on its path is `current`, and
// each group's `open` is kept here so the nested group stays open after the outer one is closed and reopened.
const thirdLevelChildren = (long?: boolean): Child[] =>
  long
    ? [
        { id: "projects/design/tokens", label: "컬러 토큰" },
        { id: "projects/design/components", label: "컴포넌트 스타일 규칙" },
        { id: "projects/design/layout", label: "레이아웃 규칙과 화면 폭별 여백 그리드 기준" },
      ]
    : [
        { id: "projects/design/tokens", label: "컬러 토큰" },
        { id: "projects/design/components", label: "컴포넌트 스타일" },
        { id: "projects/design/layout", label: "레이아웃 규칙" },
      ]

function ThirdLevelMenu({
  initial = "projects/design/tokens",
  projectOpen = true,
  designOpen = true,
  longLabels,
  many,
  height,
}: {
  initial?: string | null
  projectOpen?: boolean
  designOpen?: boolean
  longLabels?: boolean
  many?: boolean
  height?: number
}) {
  const [current, setCurrent] = useState<string | null>(initial)
  const extra = many ? Array.from({ length: 6 }, (_, i) => ({ id: `extra-${i}`, label: `추가 메뉴 ${i + 1}` })) : []
  const [open, setOpen] = useState({ projects: projectOpen, design: designOpen })
  const go = (id: string) => (event: MouseEvent) => {
    event.preventDefault()
    setCurrent(id)
  }
  const onPath = (id: string) => Boolean(current?.startsWith(`${id}/`))
  return (
    <div style={{ ...shellStyle, height }}>
      <LNB>
        <LNBBrand>
          <span>
            <small>한맥 업무 시스템</small>
            <strong>프로젝트 대시보드</strong>
          </span>
        </LNBBrand>
        <LNBNav aria-label="서비스 메뉴">
          <LNBItem href="#overview" active={current === "overview"} onClick={go("overview")}>
            <LayoutGridIcon aria-hidden="true" />
            대시보드
          </LNBItem>
          <LNBGroup label="프로젝트 관리" current={onPath("projects")} open={open.projects} onOpenChange={(value) => setOpen((state) => ({ ...state, projects: value }))}>
            <LNBGroup label="디자인 관리" current={onPath("projects/design")} open={open.design} onOpenChange={(value) => setOpen((state) => ({ ...state, design: value }))}>
              {thirdLevelChildren(longLabels).map((child) => (
                <LNBItem key={child.id} href={`#${child.id}`} active={current === child.id} onClick={go(child.id)}>
                  {child.label}
                </LNBItem>
              ))}
            </LNBGroup>
            <LNBItem href="#projects/tasks" active={current === "projects/tasks"} onClick={go("projects/tasks")}>
              업무 목록
            </LNBItem>
            <LNBItem href="#projects/schedule" active={current === "projects/schedule"} onClick={go("projects/schedule")}>
              일정 관리
            </LNBItem>
          </LNBGroup>
          <LNBItem href="#reports" active={current === "reports"} onClick={go("reports")}>
            <ChartColumnIcon aria-hidden="true" />
            현황 보고
          </LNBItem>
          <LNBItem href="#settings" active={current === "settings"} onClick={go("settings")}>
            <SettingsIcon aria-hidden="true" />
            설정
          </LNBItem>
          {extra.map((item) => (
            <LNBItem key={item.id} href={`#${item.id}`} active={current === item.id} onClick={go(item.id)}>
              <ListChecksIcon aria-hidden="true" />
              {item.label}
            </LNBItem>
          ))}
        </LNBNav>
        <ProfileMenu side="right" align="end" matchTrigger trigger={<LNBProfile name={profileData.name} description={profileData.description}><ProfileAvatar /></LNBProfile>} />
      </LNB>
      <div style={contentStyle}>
        <h2 className="text-lg font-bold">연결된 콘텐츠</h2>
        <p className="text-sm text-muted-foreground" data-current-menu>
          선택: {current ?? "없음"}
        </p>
      </div>
    </div>
  )
}

function localProfile(longLabels?: boolean) {
  return {
    name: longLabels ? "김한맥 (한맥기술 인프라사업본부 스마트시설팀)" : profileData.name,
    description: longLabels ? "통합 시스템 관리자 · 인프라사업본부" : profileData.description,
    photo: longLabels ? brokenPhoto : profileData.photo,
  }
}

function simpleNav(longLabels?: boolean, many?: boolean): LocalNode[] {
  const children: LocalNode[] = longLabels
    ? [
        { id: "tasks/list", label: "전사 프로젝트 포트폴리오의 진행 현황 목록" },
        { id: "tasks/board", label: "업무 보드" },
      ]
    : [
        { id: "tasks/list", label: "메뉴 2-1" },
        { id: "tasks/board", label: "메뉴 2-2" },
      ]
  const extra: LocalNode[] = many ? Array.from({ length: 8 }, (_, i) => ({ id: `extra-${i}`, label: `추가 메뉴 ${i + 1}`, icon: ListChecksIcon })) : []
  return [
    { id: "overview", label: longLabels ? "프로젝트 현황과 전체 일정을 한눈에 보는 개요" : "메뉴 1", icon: LayoutGridIcon },
    { id: "tasks", label: longLabels ? "업무 관리와 진행 상황 점검" : "메뉴 2", children },
    { id: "reports", label: "메뉴 3", icon: ChartColumnIcon },
    { id: "settings", label: "메뉴 4", icon: SettingsIcon },
    ...extra,
  ]
}

function thirdLevelNav(longLabels?: boolean, many?: boolean): LocalNode[] {
  const extra: LocalNode[] = many ? Array.from({ length: 6 }, (_, i) => ({ id: `extra-${i}`, label: `추가 메뉴 ${i + 1}`, icon: ListChecksIcon })) : []
  return [
    { id: "overview", label: "대시보드", icon: LayoutGridIcon },
    {
      id: "projects",
      label: "프로젝트 관리",
      children: [
        { id: "projects/design", label: "디자인 관리", children: thirdLevelChildren(longLabels) },
        { id: "projects/tasks", label: "업무 목록" },
        { id: "projects/schedule", label: "일정 관리" },
      ],
    },
    { id: "reports", label: "현황 보고", icon: ChartColumnIcon },
    { id: "settings", label: "설정", icon: SettingsIcon },
    ...extra,
  ]
}

// Story-only responsive composition. Desktop LNB and mobile Sheet are two views over one tree and one state source.
function ResponsiveSpecimen({
  nodes,
  initial,
  initialOpen,
  logo,
  eyebrow = "한맥 업무 시스템",
  brand = "프로젝트 대시보드",
  longLabels,
  height,
}: {
  nodes: LocalNode[]
  initial: string | null
  initialOpen: Record<string, boolean>
  logo?: string
  eyebrow?: string
  brand?: string
  longLabels?: boolean
  height?: number
}) {
  const [current, setCurrent] = useState<string | null>(initial)
  const [open, setOpen] = useState<Record<string, boolean>>(initialOpen)
  const profile = localProfile(longLabels)
  const go = (id: string) => (event: MouseEvent) => {
    event.preventDefault()
    setCurrent(id)
  }
  const onPath = (id: string) => Boolean(current?.startsWith(`${id}/`))
  const isOpen = (id: string) => open[id] ?? true
  const lnbMenu = (items: LocalNode[]): ReactNode =>
    items.map((node) =>
      node.children ? (
        <LNBGroup
          key={node.id}
          label={node.label}
          current={onPath(node.id)}
          open={isOpen(node.id)}
          onOpenChange={(value) => setOpen((state) => ({ ...state, [node.id]: value }))}
        >
          {lnbMenu(node.children)}
        </LNBGroup>
      ) : (
        <LNBItem key={node.id} href={`#${node.id}`} active={current === node.id} onClick={go(node.id)}>
          {node.icon ? <node.icon aria-hidden="true" /> : null}
          {node.label}
        </LNBItem>
      )
    )
  const sheetMenu = (items: LocalNode[]): ReactNode =>
    items.map((node) =>
      node.children ? (
        <LNBMobileGroup key={node.id} label={node.label} data-open={isOpen(node.id) ? "" : undefined}>
          {isOpen(node.id) ? sheetMenu(node.children) : null}
        </LNBMobileGroup>
      ) : (
        <LNBMobileLink key={node.id} href={`#${node.id}`} active={current === node.id} onClick={go(node.id)}>
          {node.label}
        </LNBMobileLink>
      )
    )
  const brandContent = (
    <>
      {logo ? <img src={logo} alt="" /> : null}
      <span>
        {eyebrow ? <small>{eyebrow}</small> : null}
        <strong>{brand}</strong>
      </span>
    </>
  )
  const profileTrigger = (
    <LNBProfile name={profile.name} description={profile.description}>
      <Avatar>
        <AvatarImage src={profile.photo} alt="" />
        <AvatarFallback>{profileData.fallback}</AvatarFallback>
      </Avatar>
    </LNBProfile>
  )
  return (
    <div
      className="grid min-w-0 grid-cols-1 bg-[var(--hm-lnb-background-end)] lg:grid-cols-[var(--hm-lnb-width)_minmax(0,1fr)]"
      style={{ minHeight: height ?? 460, height }}
      data-story-slot="responsive-lnb-specimen"
    >
      <LNB>
        <LNBBrand>{brandContent}</LNBBrand>
        <LNBNav aria-label="서비스 메뉴">{lnbMenu(nodes)}</LNBNav>
        <ProfileMenu side="right" align="end" matchTrigger trigger={profileTrigger} />
      </LNB>
      <div className="flex min-w-0 flex-col lg:col-start-2" data-story-slot="lnb-content-stack">
        <div className="lg:hidden" data-story-slot="local-mobile-menu">
          <LNBMobileHeader>
            <LNBMobileMenu title="서비스 메뉴">
              {sheetMenu(nodes)}
              <div className="mt-4 border-t border-border pt-4">
                <ProfileMenu
                  modal={false}
                  trigger={
                    <LNBProfile
                      name={profile.name}
                      description={profile.description}
                    >
                      <Avatar>
                        <AvatarImage src={profile.photo} alt="" />
                        <AvatarFallback>{profileData.fallback}</AvatarFallback>
                      </Avatar>
                    </LNBProfile>
                  }
                />
              </div>
            </LNBMobileMenu>
            <LNBMobileBrand asChild>
              <div>{brandContent}</div>
            </LNBMobileBrand>
          </LNBMobileHeader>
        </div>
        {/* Content paints above the navigation join strip, within the same LNB Mode. */}
        <div className="relative min-w-0 flex-1 max-lg:rounded-t-[var(--hm-lnb-mobile-join)] bg-[var(--hm-sem-bg-content)] p-[34px] lg:rounded-l-[var(--hm-lnb-join)]" data-story-slot="connected-content">
          <h2 className="text-lg font-bold">연결된 콘텐츠</h2>
          <p className="text-sm text-muted-foreground" data-current-menu>
            선택: {current ?? "없음"}
          </p>
        </div>
      </div>
    </div>
  )
}

// LNB Mode: desktop column and LNB Mobile Header/Sheet share one local tree and state.
// This responsive change stays within LNB Mode.
const standaloneNav: LocalNode[] = [
  { id: "overview", label: "대시보드", icon: LayoutGridIcon },
  {
    id: "projects",
    label: "프로젝트 관리",
    children: [
      {
        id: "projects/design",
        label: "디자인 관리",
        children: [
          { id: "projects/design/tokens", label: "컬러 토큰" },
          { id: "projects/design/components", label: "컴포넌트 스타일" },
          { id: "projects/design/layout", label: "레이아웃 규칙" },
        ],
      },
      { id: "projects/tasks", label: "업무 목록" },
      { id: "projects/schedule", label: "일정 관리" },
    ],
  },
  { id: "reports", label: "현황 보고", icon: ChartColumnIcon },
  { id: "settings", label: "설정", icon: SettingsIcon },
]

function Standalone({ mobileOpen = false, profileOpen = false }: { mobileOpen?: boolean; profileOpen?: boolean }) {
  const [current, setCurrent] = useState("projects/design/tokens")
  const [open, setOpen] = useState<Record<string, boolean>>({})
  const go = (id: string) => (event: MouseEvent) => {
    event.preventDefault()
    setCurrent(id)
  }
  const onPath = (id: string) => current.startsWith(`${id}/`)
  const lnbMenu = (nodes: LocalNode[]): ReactNode =>
    nodes.map((node) =>
      node.children ? (
        <LNBGroup
          key={node.id}
          label={node.label}
          current={onPath(node.id)}
          open={open[node.id] ?? true}
          onOpenChange={(value) => setOpen((state) => ({ ...state, [node.id]: value }))}
        >
          {lnbMenu(node.children)}
        </LNBGroup>
      ) : (
        <LNBItem key={node.id} href={`#${node.id}`} active={current === node.id} onClick={go(node.id)}>
          {node.icon ? <node.icon aria-hidden="true" /> : null}
          {node.label}
        </LNBItem>
      )
    )
  const sheetMenu = (nodes: LocalNode[]): ReactNode =>
    nodes.map((node) =>
      node.children ? (
        <LNBMobileGroup key={node.id} label={node.label}>
          {sheetMenu(node.children)}
        </LNBMobileGroup>
      ) : (
        <LNBMobileLink key={node.id} href={`#${node.id}`} active={current === node.id} onClick={go(node.id)}>
          {node.label}
        </LNBMobileLink>
      )
    )
  const brand = (
    <span>
      <small>한맥 업무 시스템</small>
      <strong>프로젝트 대시보드</strong>
    </span>
  )
  return (
    // LNB Mode owns its height independently of Dashboard.
    <div
      className="grid min-h-0 min-w-0 grid-cols-1 bg-[var(--hm-lnb-background-end)] lg:grid-cols-[var(--hm-lnb-width)_minmax(0,1fr)]"
      style={{ height: "100dvh" }}
      data-story-slot="responsive-lnb-specimen"
    >
      <LNB>
        <LNBBrand>{brand}</LNBBrand>
        <LNBNav aria-label="서비스 메뉴">{lnbMenu(standaloneNav)}</LNBNav>
        <ProfileMenu side="right" align="end" defaultOpen={profileOpen} matchTrigger trigger={<LNBProfile name={profileData.name} description={profileData.description}><ProfileAvatar /></LNBProfile>} />
      </LNB>
      <div className="flex min-h-0 min-w-0 flex-1 flex-col" data-story-slot="lnb-content-stack">
        <div className="lg:hidden" data-story-slot="local-mobile-menu">
          <LNBMobileHeader>
            <LNBMobileMenu title="서비스 메뉴" defaultOpen={mobileOpen}>
              {sheetMenu(standaloneNav)}
              <div className="mt-4 border-t border-border pt-4">
                <ProfileMenu
                  modal={false}
                  trigger={
                    <LNBProfile
                      name={profileData.name}
                      description={profileData.description}
                    >
                      <ProfileAvatar />
                    </LNBProfile>
                  }
                />
              </div>
            </LNBMobileMenu>
            <LNBMobileBrand asChild>
              <div>{brand}</div>
            </LNBMobileBrand>
          </LNBMobileHeader>
        </div>
        <main className="relative min-h-0 min-w-0 flex-1 overflow-auto max-lg:rounded-t-[var(--hm-lnb-mobile-join)] bg-[var(--hm-sem-bg-content)] p-[34px] lg:rounded-l-[var(--hm-lnb-join)]" data-story-slot="connected-content">
          <h2 className="text-lg font-bold">연결된 콘텐츠</h2>
          <p className="text-sm text-muted-foreground" data-current-menu>
            선택: {current}
          </p>
        </main>
      </div>
    </div>
  )
}

// A 390px viewport for the mobile Stories (the switch is a viewport media query, so a narrow container cannot show it).
const mobileViewport = {
  parameters: { viewport: { options: { hmMobile: { name: "Mobile 390", styles: { width: "390px", height: "844px" }, type: "mobile" } } } },
  globals: { viewport: { value: "hmMobile", isRotated: false } },
}

// Representative-board preview of a Story at a fixed viewport. The LNB/bar switch is a viewport media query, so the board embeds the
// verification Story (the same `Standalone` composition) in an iframe of that width instead of rebuilding it in a narrow container.
// Each iframe is its own document, so the closed Sheets do not share a portal or focus with the board.
function ViewportPreview({ story, label, width, height }: { story: string; label: string; width: number; height: number }) {
  return (
    <figure className="grid min-w-0 content-start gap-2">
      <figcaption className="text-sm text-muted-foreground">
        {label} · {width}px
      </figcaption>
      <div className="max-w-full overflow-x-auto">
        <iframe
          title={`${label} ${width}px`}
          src={`iframe.html?id=patterns-layout-lnb--${story}&viewMode=story`}
          width={width}
          height={height}
          className="box-content block border border-black/10"
        />
      </div>
    </figure>
  )
}

const meta = { title: "Patterns/Layout/LNB", component: LNB, parameters: { layout: "fullscreen", controls: { disable: true } } } satisfies Meta<typeof LNB>
export default meta
type Story = StoryObj<typeof meta>

// Representative Story: the common Story page with the column in every state side by side. Hover and click work on the real items.
// The specimens are bounded LNB columns (their own frame, not the viewport width), so they stay on the page inner.
export const All: Story = {
  name: "LNB",
  render: () => (
    <StoryPage>
      <StoryPageHeader
        kicker={STORY_KICKER.patterns}
        title="LNB"
        description="화면 왼쪽의 지역 내비게이션입니다. 1024px 이상에서 표시하고, 1023px 이하는 숨긴 뒤 모바일 메뉴로 대체합니다."
      />
      <StorySection title="Overview" description="모든 뎁스 18px. 선택은 Beige 면 + 초록 글자, 왼쪽 모서리 8로 콘텐츠와 오목하게 이어집니다.">
        <StateBoard
          min={560}
          states={[
            { id: "selected", label: "Selected", children: <ResponsiveSpecimen nodes={simpleNav()} initial="overview" initialOpen={{ tasks: true }} /> },
            { id: "third-selected", label: "3뎁스 메뉴 · 선택", note: "3뎁스는 20px 들여쓰기와 1px 그린 연결선으로 구분하며, 선은 마지막 메뉴에서 끝납니다. 선택은 베이지, 상위 경로는 노란색입니다.", children: <ResponsiveSpecimen nodes={thirdLevelNav()} initial="projects/design/tokens" initialOpen={{ projects: true, "projects/design": true }} /> },
          ]}
        />
      </StorySection>
      <StorySection title="States" description="그룹 펼침·접힘과 하위 선택에 따른 표시입니다. 선택된 경로의 상위는 접혀도 노란색을 유지합니다.">
        <StateBoard
          min={560}
          states={[
            { id: "default", label: "Default · 기존 LNB", note: "선택 없음, 2뎁스 그룹 접힘. 항목에 마우스를 올리면 Black 10%가 콘텐츠 경계까지 닿습니다.", children: <ResponsiveSpecimen nodes={simpleNav()} initial={null} initialOpen={{ tasks: false }} /> },
            { id: "expanded", label: "Expanded · 2뎁스 펼침", note: "하위 선택 없이 펼친 그룹: Black 8% 면 + 1px 초록 선.", children: <ResponsiveSpecimen nodes={simpleNav()} initial={null} initialOpen={{ tasks: true }} /> },
            { id: "selected-child", label: "Selected Child · 2뎁스 선택", note: "하위 선택: 상위 이름·화살표가 노란색, 하위는 Beige.", children: <ResponsiveSpecimen nodes={simpleNav()} initial="tasks/list" initialOpen={{ tasks: true }} /> },
            { id: "collapsed-with-selection", label: "Collapsed With Selection · 접힘", note: "하위가 선택된 채 접힌 그룹도 상위가 노란색을 유지합니다.", children: <ResponsiveSpecimen nodes={simpleNav()} initial="tasks/list" initialOpen={{ tasks: false }} /> },
            { id: "third-second-collapsed", label: "3뎁스 메뉴 · 2뎁스 접힘", note: "디자인 관리를 접어도 선택된 경로의 1·2뎁스 표시를 유지합니다. 하위 메뉴와 연결선이 함께 숨겨집니다.", children: <ResponsiveSpecimen nodes={thirdLevelNav()} initial="projects/design/tokens" initialOpen={{ projects: true, "projects/design": false }} /> },
            { id: "third-first-collapsed", label: "3뎁스 메뉴 · 1뎁스 접힘", note: "프로젝트 관리를 접어도 노란색을 유지합니다. 다시 펼치면 디자인 관리의 열림 상태가 그대로입니다(open은 화면이 관리).", children: <ResponsiveSpecimen nodes={thirdLevelNav()} initial="projects/design/tokens" initialOpen={{ projects: false, "projects/design": true }} /> },
          ]}
        />
      </StorySection>
      <StorySection title="Variants" description="로고 유무와 긴 이름입니다.">
        <StateBoard
          min={560}
          states={[
            { id: "with-logo", label: "With Logo · 로고 있음(테스트 이미지)", note: "로고는 서비스명 위, 같은 시작선. 없으면 영역·간격 없이 서비스명만 둡니다.", children: <ResponsiveSpecimen nodes={simpleNav()} initial="overview" initialOpen={{ tasks: true }} logo={testLogo} /> },
            { id: "long", label: "Long labels", note: "긴 이름은 줄바꿈되며 항목 높이가 늘어납니다.", children: <ResponsiveSpecimen nodes={simpleNav(true)} initial="tasks/list" initialOpen={{ tasks: true }} longLabels /> },
          ]}
        />
      </StorySection>
      <StorySection title="Usage · Scroll" description="메뉴가 열보다 길면 메뉴 영역만 세로로 스크롤하고 브랜드·프로필은 그대로입니다(높이 460).">
        <StateBoard
          min={560}
          states={[
            { id: "scroll", label: "Scroll", children: <ResponsiveSpecimen nodes={simpleNav(false, true)} initial="overview" initialOpen={{ tasks: true }} height={460} /> },
            { id: "third-scroll", label: "3뎁스 메뉴 · Scroll", note: "3뎁스·연결선·긴 이름도 메뉴 영역 안에서 함께 스크롤됩니다. 스크롤 영역은 브랜드 바로 아래에서 시작해 프로필 바로 위에서 끝납니다.", children: <ResponsiveSpecimen nodes={thirdLevelNav(true, true)} initial="projects/design/layout" initialOpen={{ projects: true, "projects/design": true }} longLabels height={460} /> },
          ]}
        />
      </StorySection>
      <StorySection
        title="Usage · LNB Standalone 반응형 (GNB 없음)"
        description="1024px 이상은 왼쪽 LNB의 브랜드·프로필을, 1023px 이하는 LNB를 숨긴 뒤 Local 모바일 바와 Sheet의 메뉴·프로필을 사용합니다. 열림·키보드·Escape는 LNB Standalone Mobile Menu Open에서 확인합니다."
      >
        <div className="flex flex-wrap items-start gap-6">
          <ViewportPreview story="standalone-desktop" label="Desktop" width={1024} height={640} />
          <ViewportPreview story="standalone-mobile" label="Mobile" width={390} height={640} />
        </div>
      </StorySection>
    </StoryPage>
  ),
}

export const Default: Story = { tags: ["verification"], render: () => <Menu initial={null} groupOpen={false} /> }
export const Selected: Story = { tags: ["verification"], render: () => <Menu /> }
export const Expanded: Story = { tags: ["verification"], render: () => <Menu initial={null} /> }
export const SelectedChild: Story = { tags: ["verification"], name: "Selected Child", render: () => <Menu initial="tasks/list" /> }
export const CollapsedWithSelection: Story = { tags: ["verification"], name: "Collapsed With Selection", render: () => <Menu initial="tasks/list" groupOpen={false} /> }
export const WithLogo: Story = { tags: ["verification"], name: "With Logo", render: () => <Menu logo={testLogo} /> }
export const LongLabels: Story = { tags: ["verification"], name: "Long Labels", render: () => <Menu initial="tasks/list" longLabels /> }
export const Scroll: Story = { tags: ["verification"], render: () => <Menu many height={460} /> }
export const ThirdLevel: Story = { tags: ["verification"], name: "Third Level", render: () => <ThirdLevelMenu /> }
export const ThirdLevelLongLabels: Story = { tags: ["verification"], name: "Third Level Long Labels", render: () => <ThirdLevelMenu initial="projects/design/components" longLabels /> }
export const ThirdLevelScroll: Story = { tags: ["verification"], name: "Third Level Scroll", render: () => <ThirdLevelMenu initial="projects/design/layout" longLabels many height={460} /> }

// VERIFICATION ONLY: legacy GNB + LNB technical check, forbidden in operating pages. The GNB owns the brand,
// so the LNB below has no LNBBrand and the menu starts at the column top.
export const WithGNB: Story = {
  tags: ["verification"],
  name: "VERIFICATION ONLY · GNB + LNB",
  render: () => (
    <div>
      <p role="note">VERIFICATION ONLY — 기존 혼합 구조 기술 검증. 운영 사용 금지.</p>
      <GNB>
        <GNBMobileMenu title="메뉴">
          <div className="mt-4 border-t border-border pt-4">
            <ProfileMenu
              modal={false}
              trigger={
                <GNBUser
                  name={profileData.name}
                  description={profileData.description}
                  className="w-full justify-start !text-foreground [&_[data-slot=gnb-user-description]]:!text-muted-foreground [&_[data-slot=gnb-user-text]]:!grid"
                >
                  <ProfileAvatar />
                </GNBUser>
              }
            />
          </div>
        </GNBMobileMenu>
        <GNBBrand href="#overview">
          <span>
            <small>한맥 업무 시스템</small>
            <strong>프로젝트 대시보드</strong>
          </span>
        </GNBBrand>
        <GNBNav />
        <GNBUtilities className="hidden lg:flex">
          <ProfileMenu align="end" trigger={<GNBUser name={profileData.name} description={profileData.description}><ProfileAvatar /></GNBUser>} />
        </GNBUtilities>
      </GNB>
      <Menu brand={null} profile={false} />
    </div>
  ),
}

// LNB without a GNB, responsive. Desktop (>= 1024px): the column. Mobile (<= 1023px): the column is hidden and the connected-content
// column becomes a full-width stack whose first row opens a Sheet with the same tree, selected item and every depth.
export const StandaloneDesktop: Story = { tags: ["verification"], name: "LNB Standalone Desktop", render: () => <Standalone /> }
export const LNBProfileMenuOpen: Story = { tags: ["verification"], name: "LNB Profile Menu Open", render: () => <Standalone profileOpen /> }
export const StandaloneMobile: Story = { tags: ["verification"], name: "LNB Standalone Mobile", ...mobileViewport, render: () => <Standalone /> }
export const StandaloneMobileMenuOpen: Story = {
  tags: ["verification"],
  name: "LNB Standalone Mobile Menu Open",
  ...mobileViewport,
  render: () => <Standalone mobileOpen />,
}