import { LOCATION_DATA } from './SharedData';

/**
 * 모달 조작 및 UI 생성을 위한 공통 유틸리티
 */

// 1. Select 박스의 Option HTML 생성
export function generateOptionsHTML(list: string[], defaultValue: string = '', includeSelectHint: boolean = true): string {
  let html = includeSelectHint ? '<option value="">선택</option>' : '';
  html += list.map(item => `<option value="${item}" ${item === defaultValue ? 'selected' : ''}>${item}</option>`).join('');
  return html;
}

// 2. 안전하게 폼 필드 값 설정 (Null 에러 방지)
export function setFieldValue(id: string, value: any) {
  const el = document.getElementById(id) as HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement;
  if (el) {
    el.value = value || '';
  }
}

// 3. 안전하게 폼 필드 값 읽기
export function getFieldValue(id: string): string {
  const el = document.getElementById(id) as HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement;
  return el ? el.value : '';
}

// 4. 위치 정보 파싱 및 UI 세팅
export function parseAndSetLocation(locationStr: string, bldgId: string, detailId: string, etcGroupId: string, etcInputId: string) {
  const bldgSelect = document.getElementById(bldgId) as HTMLSelectElement;
  const detailSelect = document.getElementById(detailId) as HTMLSelectElement;
  const etcGroup = document.getElementById(etcGroupId);
  const etcInput = document.getElementById(etcInputId) as HTMLInputElement;

  if (!bldgSelect || !detailSelect) return;

  // 초기화
  bldgSelect.value = '';
  detailSelect.innerHTML = '<option value="">선택</option>';
  if (etcGroup) etcGroup.style.display = 'none';

  if (!locationStr) return;

  const parts = locationStr.split(' ');
  const bldg = parts[0];
  
  if (LOCATION_DATA[bldg]) {
    bldgSelect.value = bldg;
    // 상세 목록 갱신
    detailSelect.innerHTML = generateOptionsHTML(LOCATION_DATA[bldg]);
    
    const detail = parts[1];
    if (detail) {
      detailSelect.value = detail;
      if (detail === '기타' && etcGroup && etcInput) {
        etcGroup.style.display = 'flex';
        etcInput.value = parts.slice(2).join(' ');
      }
    }
  }
}

// 5. 위치 종속성(Cascade) 이벤트 바인딩
export function bindLocationEvents(bldgId: string, detailId: string, etcGroupId: string, etcInputId: string) {
  const bldgSelect = document.getElementById(bldgId) as HTMLSelectElement;
  const detailSelect = document.getElementById(detailId) as HTMLSelectElement;
  const etcGroup = document.getElementById(etcGroupId);
  const etcInput = document.getElementById(etcInputId) as HTMLInputElement;

  if (!bldgSelect || !detailSelect) return;

  bldgSelect.addEventListener('change', () => {
    const bldg = bldgSelect.value;
    detailSelect.innerHTML = generateOptionsHTML(LOCATION_DATA[bldg] || []);
    if (etcGroup) etcGroup.style.display = 'none';
    if (etcInput) etcInput.value = '';
  });

  detailSelect.addEventListener('change', () => {
    if (etcGroup) {
      etcGroup.style.display = detailSelect.value === '기타' ? 'flex' : 'none';
    }
  });
}

// 6. 위치 문자열 조합 (저장용)
export function getCombinedLocation(bldgId: string, detailId: string, etcInputId: string): string {
  const bldg = getFieldValue(bldgId);
  const detail = getFieldValue(detailId);
  const etc = getFieldValue(etcInputId);
  
  let combined = bldg;
  if (detail) combined += ` ${detail}`;
  if (detail === '기타' && etc) combined += ` ${etc}`;
  
  return combined.trim();
}

// 7. 조회/수정 모드 UI 통합 제어
export function setEditLock(
  formId: string, 
  mode: 'view' | 'add' | 'edit', 
  options: { 
    saveBtnId: string, 
    revertBtnId: string, 
    generateBtnId?: string 
  }
) {
  const form = document.getElementById(formId) as HTMLFormElement;
  const saveBtn = document.getElementById(options.saveBtnId);
  const revertBtn = document.getElementById(options.revertBtnId);
  const generateBtn = options.generateBtnId ? document.getElementById(options.generateBtnId) : null;

  if (!form || !saveBtn || !revertBtn) return;

  if (mode === 'add' || mode === 'edit') {
    // 편집 모드 활성화
    form.classList.remove('is-view-mode');
    form.classList.add('is-edit-mode');
    saveBtn.textContent = '저장';
    revertBtn.classList.toggle('hidden', mode === 'add'); // 신규 추가 시에는 취소 버튼 숨김 (닫기가 대신함)
    
    // 번호 생성 버튼은 '추가' 시에만 노출
    if (generateBtn) generateBtn.classList.toggle('hidden', mode !== 'add');
  } else {
    // 조회 모드 (잠금)
    form.classList.remove('is-edit-mode');
    form.classList.add('is-view-mode');
    saveBtn.textContent = '수정';
    revertBtn.classList.add('hidden');
    
    // 조회 모드에서는 번호 생성 버튼 무조건 숨김
    if (generateBtn) generateBtn.classList.add('hidden');
  }
}