// department-management.js
// 부서 관리 페이지 JavaScript

let departments = [];
let selectedDepartmentId = null;
let selectedWorkers = new Set();

// 페이지 초기화
document.addEventListener('DOMContentLoaded', async () => {
  await waitForApi();
  await loadDepartments();
});

// waitForApi → api-base.js 전역 사용

// 부서 목록 로드
async function loadDepartments() {
  try {
    const result = await window.apiCall('/departments');

    if (result.success) {
      departments = result.data;
      renderDepartmentList();
      updateMoveToDepartmentSelect();
    }
  } catch (error) {
    console.error('부서 목록 로드 실패:', error);
  }
}

// 부서 목록 렌더링
function renderDepartmentList() {
  const container = document.getElementById('departmentList');

  if (departments.length === 0) {
    container.innerHTML = `
      <div style="text-align: center; padding: 2rem; color: #9ca3af;">
        등록된 부서가 없습니다.<br>
        <button class="btn btn-primary btn-sm" style="margin-top: 1rem;" onclick="openDepartmentModal()">
          첫 부서 등록하기
        </button>
      </div>
    `;
    return;
  }

  container.innerHTML = departments.map(dept => `
    <div class="department-item ${selectedDepartmentId === dept.department_id ? 'active' : ''}"
         onclick="selectDepartment(${dept.department_id})">
      <div class="department-info">
        <span class="department-name">${dept.department_name}</span>
        <span class="department-count">${dept.worker_count || 0}명</span>
      </div>
      <div class="department-actions" onclick="event.stopPropagation()">
        <button class="btn-icon" onclick="editDepartment(${dept.department_id})" title="수정">
          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
            <path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7"/>
            <path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z"/>
          </svg>
        </button>
        <button class="btn-icon danger" onclick="deleteDepartment(${dept.department_id})" title="삭제">
          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
            <polyline points="3 6 5 6 21 6"/>
            <path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"/>
          </svg>
        </button>
      </div>
    </div>
  `).join('');
}

// 부서 선택
async function selectDepartment(departmentId) {
  selectedDepartmentId = departmentId;
  selectedWorkers.clear();
  updateBulkActions();
  renderDepartmentList();

  const dept = departments.find(d => d.department_id === departmentId);
  document.getElementById('workerListTitle').textContent = `${dept.department_name} 작업자`;
  document.getElementById('addWorkerBtn').style.display = 'inline-flex';

  await loadWorkers(departmentId);
}

// 부서별 작업자 로드
async function loadWorkers(departmentId) {
  try {
    const result = await window.apiCall(`/departments/${departmentId}/workers`);

    if (result.success) {
      renderWorkerList(result.data);
    }
  } catch (error) {
    console.error('작업자 목록 로드 실패:', error);
  }
}

// 작업자 목록 렌더링
function renderWorkerList(workers) {
  const container = document.getElementById('workerList');

  if (workers.length === 0) {
    container.innerHTML = `
      <div style="text-align: center; padding: 2rem; color: #9ca3af;">
        이 부서에 소속된 작업자가 없습니다.
      </div>
    `;
    return;
  }

  container.innerHTML = workers.map(worker => `
    <div class="worker-card ${selectedWorkers.has(worker.user_id) ? 'selected' : ''}"
         onclick="toggleWorkerSelection(${worker.user_id})">
      <div class="worker-info-row">
        <input type="checkbox" ${selectedWorkers.has(worker.user_id) ? 'checked' : ''}
               onclick="event.stopPropagation(); toggleWorkerSelection(${worker.user_id})">
        <div class="worker-avatar">${worker.worker_name.charAt(0)}</div>
        <div class="worker-details">
          <span class="worker-name">${worker.worker_name}</span>
          <span class="worker-job">${getJobTypeName(worker.job_type)}</span>
        </div>
      </div>
    </div>
  `).join('');
}

// 직책 한글 변환
function getJobTypeName(jobType) {
  const names = {
    leader: '그룹장',
    worker: '작업자',
    admin: '관리자'
  };
  return names[jobType] || jobType || '-';
}

// 작업자 선택 토글
function toggleWorkerSelection(workerId) {
  if (selectedWorkers.has(workerId)) {
    selectedWorkers.delete(workerId);
  } else {
    selectedWorkers.add(workerId);
  }
  updateBulkActions();

  // 선택 상태 업데이트
  const card = document.querySelector(`.worker-card[onclick*="${workerId}"]`);
  if (card) {
    card.classList.toggle('selected', selectedWorkers.has(workerId));
    const checkbox = card.querySelector('input[type="checkbox"]');
    if (checkbox) checkbox.checked = selectedWorkers.has(workerId);
  }
}

// 일괄 작업 영역 업데이트
function updateBulkActions() {
  const bulkActions = document.getElementById('bulkActions');
  const selectedCount = document.getElementById('selectedCount');

  if (selectedWorkers.size > 0) {
    bulkActions.classList.add('visible');
    selectedCount.textContent = selectedWorkers.size;
  } else {
    bulkActions.classList.remove('visible');
  }
}

// 이동 대상 부서 선택 업데이트
function updateMoveToDepartmentSelect() {
  const select = document.getElementById('moveToDepartment');
  select.innerHTML = '<option value="">부서 이동...</option>' +
    departments.map(d => `<option value="${d.department_id}">${d.department_name}</option>`).join('');
}

// 선택한 작업자 이동
async function moveSelectedWorkers() {
  const targetDepartmentId = document.getElementById('moveToDepartment').value;

  if (!targetDepartmentId) {
    alert('이동할 부서를 선택하세요.');
    return;
  }

  if (selectedWorkers.size === 0) {
    alert('이동할 작업자를 선택하세요.');
    return;
  }

  if (parseInt(targetDepartmentId) === selectedDepartmentId) {
    alert('같은 부서로는 이동할 수 없습니다.');
    return;
  }

  try {
    const result = await window.apiCall('/departments/move-workers', 'POST', {
      workerIds: Array.from(selectedWorkers),
      departmentId: parseInt(targetDepartmentId)
    });

    if (result.success) {
      alert(result.message);
      selectedWorkers.clear();
      updateBulkActions();
      document.getElementById('moveToDepartment').value = '';
      await loadDepartments();
      await loadWorkers(selectedDepartmentId);
    } else {
      alert(result.error || '이동 실패');
    }
  } catch (error) {
    console.error('작업자 이동 실패:', error);
    alert('작업자 이동에 실패했습니다.');
  }
}

// 부서 모달 열기
function openDepartmentModal(departmentId = null) {
  const modal = document.getElementById('departmentModal');
  const title = document.getElementById('departmentModalTitle');
  const form = document.getElementById('departmentForm');

  // 상위 부서 선택 옵션 업데이트
  const parentSelect = document.getElementById('parentDepartment');
  parentSelect.innerHTML = '<option value="">없음 (최상위 부서)</option>' +
    departments
      .filter(d => d.department_id !== departmentId)
      .map(d => `<option value="${d.department_id}">${d.department_name}</option>`)
      .join('');

  if (departmentId) {
    const dept = departments.find(d => d.department_id === departmentId);
    title.textContent = '부서 수정';
    document.getElementById('departmentId').value = dept.department_id;
    document.getElementById('departmentName').value = dept.department_name;
    document.getElementById('parentDepartment').value = dept.parent_id || '';
    document.getElementById('departmentDescription').value = dept.description || '';
    document.getElementById('displayOrder').value = dept.display_order || 0;
    document.getElementById('isActive').checked = dept.is_active;
  } else {
    title.textContent = '새 부서 등록';
    form.reset();
    document.getElementById('departmentId').value = '';
    document.getElementById('isActive').checked = true;
  }

  modal.classList.add('show');
}

// 부서 모달 닫기
function closeDepartmentModal() {
  document.getElementById('departmentModal').classList.remove('show');
}

// 부서 저장
async function saveDepartment(event) {
  event.preventDefault();

  const departmentId = document.getElementById('departmentId').value;
  const data = {
    department_name: document.getElementById('departmentName').value,
    parent_id: document.getElementById('parentDepartment').value || null,
    description: document.getElementById('departmentDescription').value,
    display_order: parseInt(document.getElementById('displayOrder').value) || 0,
    is_active: document.getElementById('isActive').checked
  };

  try {
    const url = departmentId ? `/departments/${departmentId}` : '/departments';
    const method = departmentId ? 'PUT' : 'POST';

    const result = await window.apiCall(url, method, data);

    if (result.success) {
      alert(result.message);
      closeDepartmentModal();
      await loadDepartments();
    } else {
      alert(result.error || '저장 실패');
    }
  } catch (error) {
    console.error('부서 저장 실패:', error);
    alert('부서 저장에 실패했습니다.');
  }
}

// 부서 수정
function editDepartment(departmentId) {
  openDepartmentModal(departmentId);
}

// 부서 삭제
async function deleteDepartment(departmentId) {
  const dept = departments.find(d => d.department_id === departmentId);

  if (!confirm(`"${dept.department_name}" 부서를 삭제하시겠습니까?\n\n소속 작업자가 있거나 하위 부서가 있으면 삭제할 수 없습니다.`)) {
    return;
  }

  try {
    const result = await window.apiCall(`/departments/${departmentId}`, 'DELETE');

    if (result.success) {
      alert('부서가 삭제되었습니다.');
      if (selectedDepartmentId === departmentId) {
        selectedDepartmentId = null;
        document.getElementById('workerListTitle').textContent = '부서를 선택하세요';
        document.getElementById('addWorkerBtn').style.display = 'none';
        document.getElementById('workerList').innerHTML = `
          <div style="text-align: center; padding: 2rem; color: #9ca3af;">
            왼쪽에서 부서를 선택하면 해당 부서의 작업자가 표시됩니다.
          </div>
        `;
      }
      await loadDepartments();
    } else {
      alert(result.error || '삭제 실패');
    }
  } catch (error) {
    console.error('부서 삭제 실패:', error);
    alert('부서 삭제에 실패했습니다.');
  }
}

// 작업자 추가 모달 (작업자 관리 페이지로 이동)
function openAddWorkerModal() {
  alert('작업자 관리 페이지에서 작업자를 등록한 후 이 페이지에서 부서를 배정하세요.');
  // window.location.href = '/pages/admin/workers.html';
}