import { useRef, useState, type ReactNode } from "react"
import type { Meta, StoryObj } from "@storybook/react-vite"
import { withSWNotice } from "./sw-story-notice"
import {
  SWHeader, SWViewerButton, SWViewerHeader, SWViewerHint, SWViewerMenu, SWViewerPanel, SWViewerSection,
  type SWViewerHeaderGroup, type SWViewerMenuEntry,
} from "@hm-design/sw"
import "@hm-design/sw/styles.css"
import { Copy, Download, FileText, FolderOpen, Layers, Printer, Ruler, Scan, Search } from "lucide-react"
import { StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"
import { showVerificationControls } from "./sw-story-flags"
import { LAYERS, LayerPanel, OptionsPanel, PropertiesPanel, SAMPLES, VIEWER_STORY_LOGO, useViewerDemo, type ViewerDemo } from "./sw-viewer-fixture"
import "./sw-stories.css"
import "./sw-viewer-stories.css"
import placeholderLogo from "./assets/sw-header-logo-placeholder.svg"

// SW viewer mode (2026-10-19): the reference DWG/DXF viewer top menu and popups as package components.
// Stories use the public @hm-design/sw API only, like a consuming program. No DWG/DXF engine: commands are logged.
const KICKER = "HM DESIGN SYSTEM / SW"

const meta = {
  title: "SW/Viewer",
  parameters: { layout: "fullscreen", controls: { disable: true } },
  decorators: [withSWNotice],
} satisfies Meta
export default meta
type Story = StoryObj<typeof meta>

// Command record for the browser tests only (2026-10-21 Storybook simplification: not shown on the page).
function Log({ lines }: { lines: string[] }) {
  return <p hidden data-callback-log="">Command: {lines.length ? lines.join(" → ") : "없음"}</p>
}

/** A viewer screen: header on top, the drawing area below it (panels are placed inside this frame). */
function ViewerFrame({ width = 1440, height = 620, children, header }: { width?: number | null; height?: number; header: ReactNode; children?: ReactNode }) {
  return (
    <div className="sw-story-scroller">
      {/* Fills the Story column up to `width` (null: the whole column), so panels placed at the right edge stay visible. */}
      <div className="sw-viewer-story-frame" style={{ width: "100%", maxWidth: width ?? undefined, height }} data-viewer-frame="">
        {header}
        <div className="sw-viewer-story-canvas" aria-label="도면 영역 (예시)">{children}</div>
      </div>
    </div>
  )
}

function AboutPanel({ demo }: { demo: ViewerDemo }) {
  return (
    <SWViewerPanel modal strategy="absolute" title="모듈 구성 · 라이선스 고지" open={demo.aboutOpen} onClose={() => demo.setAboutOpen(false)} width={420} height="auto" resizable={false} collapsible={false}
      footer={<SWViewerButton variant="primary" onClick={() => demo.setAboutOpen(false)}>확인</SWViewerButton>}>
      <SWViewerSection title="처리 파이프라인">
        <ol className="sw-viewer-story-steps">
          <li>파일 로드 (.dwg → acadrust WASM, .dxf → dxf-parser)</li>
          <li>CAD 파싱 결과 정규화 (레이어 / 스페이스 / 엔티티)</li>
          <li>Three.js 씬 구성 및 렌더링</li>
        </ol>
      </SWViewerSection>
      <SWViewerHint>Storybook 예시: 링크와 실제 고지문은 프로그램이 제공합니다.</SWViewerHint>
    </SWViewerPanel>
  )
}

// 2026-10-22 (user request): the Viewer Header screens have no 1440px maximum; they fill the Story column.
function ViewerScreen({ width = null as number | null, initialDocument = SAMPLES[1].name as string | null, open = [] as ("layers" | "options" | "properties")[] }) {
  const demo = useViewerDemo({ initialDocument, initialPanels: open })
  return (
    <>
      <Log lines={demo.log} />
      <ViewerFrame width={width} header={<SWViewerHeader {...VIEWER_STORY_LOGO} documentTitle={demo.documentName} {...demo.fileProps} groups={demo.groups} trailing={demo.trailing} onCommand={demo.onCommand} />}>
        <LayerPanel demo={demo} strategy="absolute" />
        <OptionsPanel demo={demo} strategy="absolute" inset={{ side: 356 }} />
        <PropertiesPanel demo={demo} strategy="absolute" inset={{ side: 24, top: 488 }} />
        <AboutPanel demo={demo} />
      </ViewerFrame>
    </>
  )
}

export const ViewerHeader: Story = {
  name: "Viewer Header",
  render: () => (
    <StoryPage>
      {/* The minimize / close example was removed from this Story; the component keeps supporting it
          (SWHeaderWindowControls at the right end of `trailing`, VIEWER.md §2.1). */}
      <StoryPageHeader title="SW Viewer Header" />
      <StorySection title="기본형">
        <ViewerScreen />
      </StorySection>
    </StoryPage>
  ),
}

export const MenuGroups: Story = {
  name: "Menu Groups",
  // 2026-10-21 SW Storybook menu cleanup: hidden from the sidebar; ID and direct URL kept for the existing checks.
  tags: ["verification"],
  render: () => {
    const demo = useViewerDemo({ initialDocument: SAMPLES[1].name })
    const pick = (ids: string[]): SWViewerHeaderGroup[] => demo.groups.map(group => ({ ...group, hidden: group.hidden || !ids.includes(group.id) }))
    const rows: { title: string; ids: string[] }[] = [
      { title: "파일 그룹만 (파일 열기 · 샘플)", ids: ["file"] },
      { title: "도면 공간 (field 면 · tabs)", ids: ["space"] },
      { title: "화면 보기 (field 면 · button + switch)", ids: ["view"] },
      { title: "오른쪽 영역 (placement=end 패널 토글 + trailing 상태 · 정보)", ids: ["panels"] },
      { title: "전체", ids: demo.groups.map(group => group.id) },
    ]
    return (
      <StoryPage>
        <StoryPageHeader kicker={KICKER} title="SW Viewer — 메뉴 그룹" />
        <Log lines={demo.log} />
        <div className="sw-story-stack">
          {rows.map(row => (
            <StorySection key={row.title} title={row.title}>
              <div className="sw-story-scroller"><div style={{ width: 1440 }}><SWViewerHeader {...VIEWER_STORY_LOGO} documentTitle={demo.documentName} {...demo.fileProps} groups={pick(row.ids)} trailing={row.ids.includes("panels") ? demo.trailing : undefined} onCommand={demo.onCommand} /></div></div>
            </StorySection>
          ))}
        </div>
      </StoryPage>
    )
  },
}

export const States: Story = {
  name: "Item States",
  // 2026-10-21 SW Storybook menu cleanup: hidden from the sidebar; ID and direct URL kept for the existing checks.
  tags: ["verification"],
  render: () => {
    const [log, setLog] = useState<string[]>([])
    const record = (line: string) => setLog(lines => [...lines.slice(-7), line])
    const groups: SWViewerHeaderGroup[] = [
      {
        id: "states", label: "상태 예시", items: [
          { type: "button", id: "default", label: "기본", icon: <FolderOpen /> },
          { type: "toggle", id: "active", label: "Active (on)", icon: <Layers />, pressed: true },
          { type: "toggle", id: "inactive", label: "Toggle (off)", icon: <Layers />, pressed: false },
          { type: "button", id: "disabled", label: "Disabled", icon: <Scan />, disabled: true },
          { type: "menu", id: "menu", label: "Dropdown", entries: [{ type: "item", id: "a", label: "항목 A" }, { type: "item", id: "b", label: "항목 B (disabled)", disabled: true }] },
          { type: "menu", id: "menu-disabled", label: "Dropdown (disabled)", disabled: true, entries: [] },
        ],
      },
      // 2026-10-23: the Model / Layout tabs get a field group of their own, as in the viewer demo, so the Story shows
      // their width rule (equal buttons, the field face up to 378px with room).
      {
        id: "tabs", label: "탭", surface: "field", items: [
          { type: "tabs", id: "tabs", label: "탭", value: "model", options: [{ value: "model", label: "Model", count: 17377 }, { value: "layout", label: "Layout", count: 237 }, { value: "off", label: "Disabled", disabled: true }] },
        ],
      },
      {
        id: "field", label: "field 면", surface: "field", items: [
          { type: "switch", id: "on", label: "Switch on", checked: true },
          { type: "switch", id: "off", label: "Switch off", checked: false },
          { type: "switch", id: "sw-disabled", label: "Disabled", checked: false, disabled: true },
        ],
      },
    ]
    return (
      <StoryPage>
        <StoryPageHeader kicker={KICKER} title="SW Viewer — Active / Hover / Disabled" />
        <Log lines={log} />
        <div className="sw-story-scroller"><div style={{ width: 1440 }}>
          <SWViewerHeader {...VIEWER_STORY_LOGO} documentTitle="상태 확인용.dwg" groups={groups} onCommand={command => record(`${command.id}${command.value !== undefined ? `=${String(command.value)}` : ""}`)} />
        </div></div>
      </StoryPage>
    )
  },
}

const MENU_ENTRIES: SWViewerMenuEntry[] = [
  { type: "label", id: "l-file", label: "파일" },
  { type: "item", id: "open", label: "파일 열기", icon: <FolderOpen size={16} />, shortcut: "Ctrl+O" },
  {
    type: "submenu", id: "recent", label: "최근 도면", icon: <FileText size={16} />, entries: [
      ...SAMPLES.map(sample => ({ type: "item" as const, id: `recent:${sample.id}`, label: sample.name })),
      { type: "separator", id: "s-recent" },
      { type: "submenu", id: "recent-more", label: "보관 도면", entries: [{ type: "item", id: "archive:2025", label: "2025-평면도.dwg" }, { type: "item", id: "archive:2024", label: "2024-종단면도.dwg" }] },
    ],
  },
  { type: "item", id: "export", label: "PNG로 내보내기", icon: <Download size={16} /> },
  { type: "item", id: "print", label: "인쇄 (미연결)", icon: <Printer size={16} />, disabled: true },
  { type: "separator", id: "s1" },
  { type: "label", id: "l-view", label: "화면 보기" },
  { type: "checkbox", id: "grid", label: "그리드", checked: true },
  { type: "checkbox", id: "lineweight", label: "선가중치 표시", checked: false },
  { type: "separator", id: "s2" },
  { type: "label", id: "l-unit", label: "단위" },
  { type: "radio", id: "unit:mm", label: "mm", checked: true },
  { type: "radio", id: "unit:m", label: "m", checked: false },
]

export const Dropdowns: Story = {
  name: "Header + Dropdown",
  // 2026-10-21 SW Storybook menu cleanup: hidden from the sidebar; ID and direct URL kept for the existing checks.
  tags: ["verification"],
  render: () => {
    const [entries, setEntries] = useState(MENU_ENTRIES)
    const [log, setLog] = useState<string[]>([])
    const record = (line: string) => setLog(lines => [...lines.slice(-7), line])
    const apply = (entry: SWViewerMenuEntry) => setEntries(list => list.map(item => {
      if (entry.type === "checkbox" && item.id === entry.id && item.type === "checkbox") return { ...item, checked: !item.checked }
      if (entry.type === "radio" && item.type === "radio" && item.id.startsWith("unit:")) return { ...item, checked: item.id === entry.id }
      return item
    }))
    const groups: SWViewerHeaderGroup[] = [
      { id: "file", label: "파일", items: [{ type: "menu", id: "file", label: "도면", icon: <FileText />, entries: entries.map(entry => ({ ...entry, ...(entry.type === "checkbox" || entry.type === "radio" ? { keepOpen: false } : {}) })) }] },
      { id: "tools", label: "도구", items: [
        { type: "menu", id: "measure", label: "측정", icon: <Ruler />, entries: [{ type: "item", id: "distance", label: "거리" }, { type: "item", id: "area", label: "면적" }, { type: "submenu", id: "angle", label: "각도", entries: [{ type: "item", id: "angle:2", label: "두 선 사이" }, { type: "item", id: "angle:3", label: "세 점" }] }] },
        { type: "menu", id: "align-end", label: "오른쪽 정렬 메뉴", menuAlign: "end", menuWidth: 220, entries: [{ type: "item", id: "copy", label: "좌표 복사", icon: <Copy size={16} /> }, { type: "item", id: "find", label: "객체 찾기", icon: <Search size={16} /> }] },
      ] },
    ]
    return (
      <StoryPage>
        <StoryPageHeader kicker={KICKER} title="SW Viewer — 상단 메뉴 + Dropdown" />
        <Log lines={log} />
        <div className="sw-story-scroller sw-viewer-story-room"><div style={{ width: 1440 }}>
          <SWViewerHeader {...VIEWER_STORY_LOGO} documentTitle="C0060202-001-평면및종단면도.dwg" groups={groups}
            onCommand={command => { const entry = findEntry(entries, command.id); if (entry) apply(entry); record(`${command.itemId}/${command.id}${command.value !== undefined ? `=${String(command.value)}` : ""}`) }} />
        </div></div>
        {showVerificationControls() && <StorySection title="SWViewerMenu 단독 (Context Menu)">
          <ContextMenuDemo onSelect={line => record(line)} />
        </StorySection>}
      </StoryPage>
    )
  },
}

function findEntry(entries: SWViewerMenuEntry[], id: string): SWViewerMenuEntry | undefined {
  for (const entry of entries) {
    if (entry.id === id) return entry
    if (entry.type === "submenu") { const found = findEntry(entry.entries, id); if (found) return found }
  }
  return undefined
}

function ContextMenuDemo({ onSelect }: { onSelect: (line: string) => void }) {
  const [point, setPoint] = useState<{ x: number; y: number } | null>(null)
  return (
    <div className="sw-viewer-story-context" onContextMenu={event => { event.preventDefault(); setPoint({ x: event.clientX, y: event.clientY }) }} data-context-area="">
      도면 영역 (오른쪽 클릭)
      <SWViewerMenu open={point !== null} onOpenChange={open => { if (!open) setPoint(null) }} anchorPoint={point ?? undefined} label="도면 메뉴" initialFocus="menu"
        entries={[
          { type: "item", id: "fit", label: "전체 보기", shortcut: "F" },
          { type: "item", id: "zoom-selection", label: "선택 확대" },
          { type: "separator", id: "s" },
          { type: "submenu", id: "layer", label: "레이어", entries: LAYERS.slice(0, 4).map(layer => ({ type: "item" as const, id: `hide:${layer.name}`, label: `${layer.name} 숨기기` })) },
          { type: "item", id: "props", label: "속성 보기" },
        ]}
        onEntrySelect={entry => onSelect(`context/${entry.id}`)} />
    </div>
  )
}

export const SettingsPanel: Story = {
  name: "Settings Popup",
  // 2026-10-21: merged into the Settings Popup Story (content-variants); hidden, ID kept for the existing checks.
  tags: ["verification"],
  render: () => {
    const demo = useViewerDemo({ initialDocument: SAMPLES[1].name, initialPanels: ["options"] })
    return (
      <StoryPage>
        <StoryPageHeader kicker={KICKER} title="SW Viewer — 설정창 (SWViewerPanel)" />
        <Log lines={demo.log} />
        <ViewerFrame header={<SWViewerHeader {...VIEWER_STORY_LOGO} documentTitle={demo.documentName} {...demo.fileProps} groups={demo.groups} trailing={demo.trailing} onCommand={demo.onCommand} />}>
          <OptionsPanel demo={demo} strategy="absolute" />
        </ViewerFrame>
      </StoryPage>
    )
  },
}

export const ContentVariants: Story = {
  // 2026-10-21: the one settings-popup Story (former 설정창 and 같은 프레임, 다른 내부 콘텐츠 pages); ID kept.
  // 2026-10-22 (user request): the 축척 지정 demo popup was removed.
  name: "설정창",
  render: () => {
    const demo = useViewerDemo({ initialDocument: SAMPLES[1].name, initialPanels: ["layers", "properties", "options"] })
    return (
      <StoryPage>
        <StoryPageHeader title="SW Viewer — 설정창 (SWViewerPanel)" />
        <Log lines={demo.log} />
        {/* 2026-10-22: 620px fits the tallest popup (옵션, 520px) now that 축척 지정 is gone. */}
        <ViewerFrame height={620} header={<SWViewerHeader {...VIEWER_STORY_LOGO} documentTitle={demo.documentName} {...demo.fileProps} groups={demo.groups} trailing={demo.trailing} onCommand={demo.onCommand} />}>
          <LayerPanel demo={demo} strategy="absolute" defaultPosition={{ left: 24, top: 16 }} />
          <PropertiesPanel demo={demo} strategy="absolute" defaultPosition={{ left: 368, top: 16 }} />
          <OptionsPanel demo={demo} strategy="absolute" defaultPosition={{ left: 712, top: 16 }} />
        </ViewerFrame>
      </StoryPage>
    )
  },
}

export const VariableSize: Story = {
  name: "Variable Size Popups",
  // 2026-10-21 SW Storybook menu cleanup: hidden from the sidebar; ID and direct URL kept for the existing checks.
  tags: ["verification"],
  render: () => {
    const sizes: { id: string; title: string; width: number; height: number | "auto"; left: number; note: string }[] = [
      { id: "s", title: "250 × auto (최소 폭)", width: 250, height: "auto", left: 16, note: "내용 높이" },
      { id: "m", title: "320 × 420 (기본)", width: 320, height: 420, left: 282, note: "본문 스크롤" },
      { id: "l", title: "480 × 300 (가로형)", width: 480, height: 300, left: 618, note: "resize: both" },
    ]
    const [open, setOpen] = useState<Record<string, boolean>>({ s: true, m: true, l: true })
    const lines = Array.from({ length: 24 }, (_, index) => `행 ${index + 1}`)
    return (
      <StoryPage>
        <StoryPageHeader kicker={KICKER} title="SW Viewer — 가변 크기 팝업" />
        <ViewerFrame height={520} header={<SWViewerHeader {...VIEWER_STORY_LOGO} documentTitle="크기 비교.dwg" groups={[]} />}>
          {sizes.map(size => (
            <SWViewerPanel key={size.id} strategy="absolute" defaultPosition={{ left: size.left, top: 16 }} title={size.title} open={open[size.id]} onClose={() => setOpen({ ...open, [size.id]: false })} width={size.width} height={size.height}>
              <SWViewerHint>{size.note}</SWViewerHint>
              <SWViewerSection surface="plain">{(size.height === "auto" ? lines.slice(0, 3) : lines).map(line => <div key={line}>{line}</div>)}</SWViewerSection>
            </SWViewerPanel>
          ))}
        </ViewerFrame>
      </StoryPage>
    )
  },
}

export const Logo: Story = {
  name: "로고",
  render: () => {
    const demo = useViewerDemo({ initialDocument: SAMPLES[1].name })
    const rows: { title: string; props: { logoSrc?: string; logo?: ReactNode; logoAlt?: string } }[] = [
      { title: "로고 없음 (기본)", props: {} },
      { title: "logoSrc (이미지 URL)", props: { logoSrc: placeholderLogo, logoAlt: "임시 로고" } },
      { title: "logo (요소)", props: { logo: <svg viewBox="0 0 32 17" width="32" height="17" aria-hidden="true"><rect x="0.5" y="0.5" width="31" height="16" rx="3" fill="none" stroke="#fff" /><text x="16" y="12.5" fill="#fff" fontSize="10" fontWeight="700" textAnchor="middle">LOGO</text></svg>, logoAlt: "예시 로고" } },
    ]
    return (
      <StoryPage>
        <StoryPageHeader title="SW Viewer — 로고" />
        <div className="sw-story-stack">
          {rows.map(row => (
            <StorySection key={row.title} title={row.title}>
              {/* 1440px is a maximum (2026-10-22): no scroller; the header fits the available width. */}
              <div style={{ width: "100%", maxWidth: 1440 }} data-logo-case={row.title}>
                <SWViewerHeader {...row.props} documentTitle={demo.documentName} {...demo.fileProps} groups={demo.groups} trailing={demo.trailing} onCommand={demo.onCommand} />
              </div>
            </StorySection>
          ))}
          <Log lines={demo.log} />
        </div>
      </StoryPage>
    )
  },
}

export const Responsive: Story = {
  name: "화면 너비",
  render: () => {
    const demo = useViewerDemo({ initialDocument: SAMPLES[1].name })
    return (
      <StoryPage>
        <StoryPageHeader title="SW Viewer — 화면 너비" />
        <Log lines={demo.log} />
        <div className="sw-story-stack sw-story-responsive">
          {[1920, 1440, 1280, 950, 860, 760, 520].map(width => (
            // 2026-10-22 (user request): the 1920 row no longer reaches out of the content area (no sw-story-responsive-wide);
            // like the other rows it is a maximum inside the Story column. 2026-10-23: it is hidden on the same narrow pages
            // as the SW Header / Footer 1920 rows (sw-story-responsive-hidden, sw-stories.css), e.g. a 1920px screen.
            <div key={width} className={width === 1920 ? "sw-story-responsive-hidden" : undefined}><StorySection title={`${width}px`}>
              {/* The row width is a maximum (2026-10-22): on a narrower screen the header shrinks with it instead of scrolling. */}
              {/* Same structure as the Logo page (no scroller / bottom padding), so the spacing matches it. */}
              <div style={{ width: "100%", maxWidth: width }} data-width={width}><SWViewerHeader {...VIEWER_STORY_LOGO} documentTitle={demo.documentName} {...demo.fileProps} groups={demo.groups} trailing={demo.trailing} onCommand={demo.onCommand} /></div>
            </StorySection></div>
          ))}
        </div>
      </StoryPage>
    )
  },
}

function ModeSwitchDemo() {
  const [mode, setMode] = useState<"normal" | "viewer">("normal")
  const demo = useViewerDemo({ initialDocument: SAMPLES[1].name })
  const headerRef = useRef<HTMLElement>(null)
  return (
    <>
      <div className="sw-viewer-story-mode" role="radiogroup" aria-label="모드">
        {(["normal", "viewer"] as const).map(value => (
          <label key={value}><input type="radio" name="sw-mode" checked={mode === value} onChange={() => setMode(value)} /> {value === "normal" ? "일반 SW 모드 (SWHeader)" : "뷰어 모드 (SWViewerHeader)"}</label>
        ))}
      </div>
      <Log lines={demo.log} />
      <ViewerFrame height={480} header={mode === "normal"
        ? <SWHeader ref={headerRef} documentTitle={demo.documentName ?? ""} logoSrc={placeholderLogo} logoAlt="임시 로고 (뷰어 모드로)" onHomeClick={() => setMode("viewer")} />
        : <SWViewerHeader ref={headerRef} documentTitle={demo.documentName} documents={demo.fileProps.documents} activeDocumentId={demo.fileProps.activeDocumentId} onDocumentSelect={demo.fileProps.onDocumentSelect} onDocumentOpen={demo.fileProps.onDocumentOpen} documentOpenLabel={demo.fileProps.documentOpenLabel} groups={demo.groups} trailing={demo.trailing} onCommand={demo.onCommand} logoSrc={placeholderLogo} logoAlt="임시 로고 (일반 모드로)" onHomeClick={() => setMode("normal")} />}>
        {mode === "viewer" && <><LayerPanel demo={demo} strategy="absolute" /><OptionsPanel demo={demo} strategy="absolute" inset={{ side: 356 }} /></>}
      </ViewerFrame>
    </>
  )
}

// 2026-10-22 (user request): removed from the sidebar; ID and direct URL kept for the viewer browser tests.
export const CompareWithSWHeader: Story = {
  name: "SWHeader vs Viewer Header",
  tags: ["verification"],
  render: () => (
    <StoryPage>
      <StoryPageHeader title="SW Viewer — 일반 SW Header와 비교" />
      <StorySection title="나란히 비교 (1440px)">
        <div className="sw-story-stack">
          <div className="sw-story-scroller"><div style={{ width: 1440 }}><SWHeader logoSrc={placeholderLogo} logoAlt="임시 로고" documentTitle="C0060202-001-평면및종단면도" /></div></div>
          <div className="sw-story-scroller"><div style={{ width: 1440 }}><ViewerOnly /></div></div>
        </div>
      </StorySection>
      <StorySection title="일반 ↔ 뷰어 모드 전환">
        <ModeSwitchDemo />
      </StorySection>
    </StoryPage>
  ),
}

function ViewerOnly() {
  const demo = useViewerDemo({ initialDocument: SAMPLES[1].name })
  // 2026-10-23: the same placeholder logo as the SWHeader row, so the two logo slots compare at the same width.
  return <SWViewerHeader logoSrc={placeholderLogo} logoAlt="임시 로고" documentTitle={demo.documentName} {...demo.fileProps} groups={demo.groups} trailing={demo.trailing} onCommand={demo.onCommand} />
}