import { createLandingGuide } from './landing-guide';
import { createHeroMotion, heroMotionMarkup } from './landing-motion';
import './landing-white.css';
import { sampleProjects } from './sample-projects';
import { parseProject } from '../src/core/project';
import { createDrawingPopup, drawingPopupMarkup } from './drawing-popup';

const appRoot = document.querySelector<HTMLDivElement>('.app');
const homeButton = document.querySelector<HTMLButtonElement>('#home-from-app');
const promoImageUrl = new URL('./assets/pierzainer-terrain-promo.png', import.meta.url).href;
const companyLogosUrl = new URL('./assets/family-company-logos.png', import.meta.url).href;

const landingOverlay = document.createElement('div');
landingOverlay.className = 'landing-overlay landing-white';
landingOverlay.setAttribute('role', 'dialog');
landingOverlay.setAttribute('aria-modal', 'true');
landingOverlay.setAttribute('aria-label', '프로그램 시작 선택');

const landingPanelMarkup = `
  <div class="landing-shell">
    <section class="landing-hero" aria-label="프로그램 홍보 영역">
      <div class="landing-engineering-grid" aria-hidden="true"></div>
      <div class="landing-light-stage" aria-hidden="true">
        <div class="landing-glow"></div>
        <div class="landing-light-ring"></div>
        <div class="landing-orbit landing-orbit-one"></div>
        <div class="landing-orbit landing-orbit-two"></div>
        <div class="landing-orbit landing-orbit-three"></div>
        <div class="landing-particles">
          <i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i>
        </div>
      </div>
      <div class="landing-hero-copy">
        <div class="landing-title-group">
          <h1 class="landing-title">PIER <span>&amp;</span> ABUT</h1>
          <h2 class="landing-headline">교각 설계의 새로운 시작</h2>
        </div>
        <div class="landing-brand-meta">
          <span class="landing-kicker"><span class="landing-status-light"></span> PIERZAINER <span class="landing-kicker-divider">/</span><span class="landing-kicker-detail">BRIDGE DESIGN STUDIO</span></span>
          <p class="landing-subtitle">
            설계정보 입력부터 3D 모델링, 구조해석, 철근배근, 도면 및 수량산출까지 하나의 플랫폼에서
          </p>
          <button class="landing-guide-trigger" type="button" aria-haspopup="dialog"><span aria-hidden="true">?</span>사용 가이드 <span class="landing-guide-trigger-arrow" aria-hidden="true">↗</span></button>
        </div>
      </div>
      <div class="landing-hero-visual" aria-hidden="true">
        <div class="landing-visual">
          <div class="landing-artwork">
            <img class="landing-promo-image" src="${promoImageUrl}" alt="" draggable="false" fetchpriority="high" />
            ${heroMotionMarkup(promoImageUrl)}
          </div>
        </div>
        <span class="landing-showcase-label">DIGITAL TWIN SHOWCASE <span>브랜딩 모션 · 해석 결과 아님</span></span>
      </div>

    <section class="landing-cards" aria-label="입력 방식 선택">
      <article class="landing-card" data-card="excel">
        <div>
          <div class="landing-card-top"><div class="landing-card-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M14 3H6a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V9zM14 3v6h6M8 13h8M8 17h8M12 13v4"/></svg></div><span class="landing-card-number">01 / IMPORT</span></div>
          <span class="landing-card-eyebrow">Excel Import</span>
          <h3>엑셀 불러오기</h3>
          <p>기존에 작성된 설계정보 Excel 파일을 불러와 모델링을 시작합니다.</p>
        </div>
        <div class="landing-card-actions">
          <span class="landing-card-note">Excel · .xlsx</span>
          <button class="landing-primary" type="button">Excel 파일 불러오기</button>
        </div>
      </article>

      <article class="landing-card" data-card="drawing">
        <div>
          <div class="landing-card-top"><div class="landing-card-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M4 4h16v16H4zM4 9h7v11M11 4v5h9M15 13h2v3h-2M7 13v3"/></svg></div><span class="landing-card-number">02 / EXTRACT</span></div>
          <span class="landing-card-eyebrow">Drawing Import</span>
          <h3>도면 불러오기</h3>
          <p>도면 폴더에서 교각 정보를 추출하고 결과 Excel을 바로 불러옵니다.</p>
        </div>
        <div class="landing-card-actions">
          <span class="landing-card-note" id="landing-drawing-status" role="status" aria-live="polite">프로그램 안에서 도면 추출</span>
          <button class="landing-primary" type="button">도면 불러오기</button>
        </div>
      </article>

      <article class="landing-card" data-card="sample">
        <div>
          <div class="landing-card-top"><div class="landing-card-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="m12 3 9 5-9 5-9-5zM3 8v9l9 5 9-5V8M12 13v9"/></svg></div><span class="landing-card-number">03 / EXPLORE</span></div>
          <span class="landing-card-eyebrow">Explore Sample</span>
          <h3>샘플 프로젝트</h3>
          <p>실제 교량의 교각·지반·위성사진·2D 지도를 함께 살펴봅니다.</p>
        </div>
        <div class="landing-card-actions">
          <span class="landing-card-note">자료 12개 · 바로 열기 ${sampleProjects.filter(s => !s.blockReason).length}개</span>
          <button class="landing-primary" type="button">샘플 모델 선택</button>
        </div>
      </article>
    </section>
    <footer class="landing-footer">
      <div class="landing-footer-note" aria-hidden="true"><span>PRECISION IN EVERY DIMENSION</span><span>PIERZAINER · PIER &amp; ABUT</span></div>
      <div class="landing-company-logos"><img src="${companyLogosUrl}" width="9719" height="295" alt="한맥기술, 삼안, 장헌산업, 피티씨, 장헌, 한라산업개발, 바로컨설턴트 로고" draggable="false" /></div>
    </footer>
    </section>

    <section id="landing-excel-panel" class="landing-panel" aria-label="엑셀 입력 패널">
      <div class="landing-panel-head">
        <h3>엑셀 입력</h3>
        <button type="button" class="landing-close-button" data-close-panel="landing-excel-panel">닫기</button>
      </div>
      <div class="landing-panel-body">
        <div class="landing-file-meta">
          <span>선택 파일</span>
          <strong id="landing-excel-name">선택된 파일이 없습니다.</strong>
        </div>
        <div class="landing-actions-row">
          <input id="landing-excel-input" type="file" accept=".xlsx,.xls,.xlsm" hidden />
          <button class="landing-ghost" type="button" data-pick-file="excel">파일 선택</button>
          <button id="landing-excel-start" class="landing-primary" type="button" disabled>모델링 시작</button>
        </div>
      </div>
    </section>

    ${drawingPopupMarkup}

    <section id="landing-sample-panel" class="landing-panel" aria-label="샘플 모델 패널">
      <div class="landing-panel-head">
        <h3>교각 + 지반 샘플 프로젝트</h3>
        <button type="button" class="landing-close-button" data-close-panel="landing-sample-panel">닫기</button>
      </div>
      <div class="landing-panel-body">
        <p class="landing-sample-intro">검증된 교량은 교각·지반·위성사진·2D 지도를 함께 엽니다. 확인이 필요한 샘플은 원인을 안내합니다. Excel 설계 지반고는 유지합니다.</p>
        <p class="landing-sample-status" id="landing-sample-status" role="status" aria-live="polite"></p>
        <div class="landing-sample-grid" id="landing-sample-grid"></div>
        <p class="landing-sample-caption">지도 좌표계는 원자료 확인이 필요한 추정값을 포함합니다. 지반면과 설계 지반고의 차이 및 기존 모델 검증 알림은 보존됩니다.</p>
      </div>
    </section>
  </div>
`;

landingOverlay.innerHTML = landingPanelMarkup;
document.body.prepend(landingOverlay);
const landingGuide = createLandingGuide(landingOverlay);
createHeroMotion(landingOverlay);

const selectPanel = (panelId: string): void => {
  landingGuide.close(false);
  document.querySelectorAll<HTMLElement>('.landing-panel').forEach((panel) => {
    panel.classList.toggle('visible', panel.id === panelId);
  });
  const visible = document.getElementById(panelId);
  if (visible) {
    visible.scrollTo({ top: 0, behavior: 'auto' });
  }
};

const closePanels = (): void => {
  document.querySelectorAll<HTMLElement>('.landing-panel').forEach((panel) => panel.classList.remove('visible'));
};

const showApp = (): void => {
  landingGuide.close(false);
  if (appRoot) {
    appRoot.hidden = false;
    appRoot.setAttribute('aria-hidden', 'false');
  }
  if (homeButton) {
    homeButton.hidden = false;
  }
  landingOverlay.hidden = true;
};

const showLanding = (): void => {
  if (appRoot) {
    appRoot.hidden = true;
    appRoot.setAttribute('aria-hidden', 'true');
  }
  if (homeButton) {
    homeButton.hidden = true;
  }
  landingOverlay.hidden = false;
  landingOverlay.classList.remove('modal-open');
  closePanels();
};

const selectFile = (input: HTMLInputElement): void => {
  input.click();
};

const excelInput = document.querySelector<HTMLInputElement>('#landing-excel-input');
const excelName = document.querySelector<HTMLElement>('#landing-excel-name');
const excelStart = document.querySelector<HTMLButtonElement>('#landing-excel-start');

const ensureNoLegacyImportDialog = (): void => {
  const dialog = document.querySelector<HTMLDialogElement>('#import-dialog');
  if (dialog && dialog.open) dialog.close();
};

if (excelInput && excelName && excelStart) {
  excelInput.addEventListener('change', () => {
    const file = excelInput.files?.[0];
    const name = file ? file.name : '선택된 파일이 없습니다.';
    excelName.textContent = name;
    excelStart.disabled = !file;
    ensureNoLegacyImportDialog();
  });

  excelStart.addEventListener('click', () => {
    if (!excelInput.files?.[0]) return;
    ensureNoLegacyImportDialog();
    showApp();
  });
}

const bindFilePicker = (button: Element, targetId: string, nameTargetId: string): void => {
  const input = document.querySelector<HTMLInputElement>(`#${targetId}`);
  const output = document.querySelector<HTMLElement>(`#${nameTargetId}`);
  if (!input || !output) return;
  button.addEventListener('click', () => selectFile(input));
  input.addEventListener('change', () => {
    const file = input.files?.[0];
    output.textContent = file ? file.name : '미선택';
  });
};

const bindCard = (cardSelector: string, panelId: string, mode: 'panel' | 'picker' = 'panel'): void => {
  const card = document.querySelector<HTMLElement>(cardSelector);
  const trigger = card?.querySelector<HTMLButtonElement>('button');
  if (!trigger) return;
  trigger.addEventListener('click', () => {
    landingGuide.dismissHint();
    landingGuide.close(false);
    if (mode === 'picker') {
      if (cardSelector === '[data-card="excel"]') {
        if (landingOverlay) {
          landingOverlay.hidden = false;
          landingOverlay.classList.add('modal-open');
        }
        const dialog = document.querySelector<HTMLDialogElement>('#import-dialog');
        if (dialog && !dialog.open) {
          dialog.showModal();
        }
        const projectName = document.querySelector<HTMLInputElement>('#project-name');
        if (projectName) projectName.focus();
        return;
      }
      if (cardSelector === '[data-card="sample"]') {
        void window.openSampleProject?.();
        return;
      }
    }
    selectPanel(panelId);
  });
};

bindCard('[data-card="excel"]', 'landing-excel-panel', 'picker');
bindCard('[data-card="sample"]', 'landing-sample-panel');

const drawingPopup = createDrawingPopup(landingOverlay, () => {
  landingGuide.dismissHint();
  landingGuide.close(false);
  closePanels();
});
document.querySelector<HTMLButtonElement>('[data-card="drawing"] button')!.addEventListener('click', () => drawingPopup.open());

document.querySelectorAll<HTMLElement>('[data-close-panel]').forEach((button) => {
  button.addEventListener('click', () => {
    const panelId = button.getAttribute('data-close-panel');
    if (!panelId) return;
    const panel = document.getElementById(panelId);
    panel?.classList.remove('visible');
  });
});

document.querySelectorAll<HTMLButtonElement>('[data-pick-file]').forEach((button) => {
  const kind = button.getAttribute('data-pick-file');
  if (!kind) return;

  const targetMap: Record<string, string> = {
    excel: 'landing-excel-input',
  };

  const targetId = targetMap[kind];
  if (!targetId) return;

  const input = document.querySelector<HTMLInputElement>(`#${targetId}`);
  if (!input) return;
  button.addEventListener('click', () => selectFile(input));
});

bindFilePicker(document.querySelector('[data-pick-file="excel"]') as HTMLButtonElement, 'landing-excel-input', 'landing-excel-name');

const sampleGrid = document.querySelector<HTMLElement>('#landing-sample-grid');
let sampleLoading = false;
if (sampleGrid) {
  sampleProjects.forEach((sample) => {
    const item = document.createElement('button');
    item.type = 'button';
    item.className = 'landing-sample';
    item.innerHTML = `
      <span class="landing-sample-badge">${String(sample.sample).padStart(2, '0')}</span>
      <strong>${sample.bridge}</strong>
      <span>교각 ${sample.sourcePierCount}기 · 지반 + 지도 2종</span>
      <span class="landing-sample-open">${sample.blockReason ? (sample.pierCount ? '앱 호환 오류 확인' : '방위각 입력 확인 필요') : `형상 ${sample.builtCount}/${sample.sourcePierCount}기 · 열기 ↗`}</span>
    `;
    item.dataset.sample = String(sample.sample);
    item.addEventListener('click', async () => {
      if (sampleLoading) return;
      const status = document.querySelector<HTMLElement>('#landing-sample-status')!;
      if (sample.blockReason) { status.textContent = `${sample.bridge}: ${sample.blockReason}`; return; }
      sampleLoading = true;
      status.textContent = `${sample.bridge} · 교각과 지반·지도를 불러오는 중…`;
      sampleGrid.setAttribute('aria-busy', 'true');
      sampleGrid.querySelectorAll('button').forEach(button => { button.disabled = true; });
      try {
        const response = await fetch(sample.url);
        if (!response.ok) throw new Error(`샘플 다운로드 실패 (${response.status})`);
        const text = await response.text();
        const project = parseProject(text);
        if (project.project.bridge !== sample.bridge || project.piers.length !== sample.pierCount || project.groundModel?.mapLayers?.length !== 2) {
          throw new Error('샘플의 교각 또는 지도 데이터가 일치하지 않습니다.');
        }
        const picker = document.querySelector<HTMLInputElement>('#project-file');
        const toasts = document.querySelector('#toast-host');
        if (!picker || !toasts) throw new Error('프로젝트 열기 기능을 찾을 수 없습니다.');
        // Reuse the app's existing project-file import. No parallel model loader or global state edits.
        const opened = new Promise<void>((resolve, reject) => {
          const observer = new MutationObserver(records => {
            for (const record of records) for (const node of record.addedNodes) {
              const message = node.textContent ?? '';
              if (message.includes(`${sample.filename}을 열었습니다.`)) { cleanup(); resolve(); }
              else if (message.includes('프로젝트 파일을 열지 못했습니다:')) { cleanup(); reject(new Error(message)); }
            }
          });
          const timer = window.setTimeout(() => { cleanup(); reject(new Error('프로젝트 열기 완료를 확인하지 못했습니다. 다시 선택해 주세요.')); }, 60000);
          const cleanup = (): void => { observer.disconnect(); window.clearTimeout(timer); };
          observer.observe(toasts, {childList:true, subtree:true});
        });
        const transfer = new DataTransfer();
        transfer.items.add(new File([text], sample.filename, {type:'application/json'}));
        picker.files = transfer.files;
        showApp();
        picker.dispatchEvent(new Event('change', {bubbles:true}));
        await opened;
        sampleGrid.querySelectorAll('.primary').forEach(button => button.classList.remove('primary'));
        item.classList.add('primary');
        status.textContent = `${sample.bridge} · 교각 ${sample.pierCount}기와 지도 포함 지반을 열었습니다.`;
      } catch (error) {
        showLanding();
        selectPanel('landing-sample-panel');
        status.textContent = `${sample.bridge}: ${(error as Error).message}`;
      } finally {
        sampleLoading = false;
        sampleGrid.removeAttribute('aria-busy');
        sampleGrid.querySelectorAll('button').forEach(button => { button.disabled = false; });
      }
    });
    sampleGrid.appendChild(item);
  });
}

if (homeButton) {
  homeButton.addEventListener('click', () => {
    showLanding();
  });
}

if (appRoot) {
  appRoot.hidden = true;
  appRoot.setAttribute('aria-hidden', 'true');
}
if (homeButton) {
  homeButton.hidden = true;
}

showLanding();