// 안전관리 대시보드 JavaScript

let currentStatus = 'pending';
let requests = [];
let currentRejectRequestId = null;

// ==================== Toast 알림 ====================

function showToast(message, type = 'info', duration = 3000) {
  const toastContainer = document.getElementById('toastContainer') || createToastContainer();

  const toast = document.createElement('div');
  toast.className = `toast toast-${type}`;

  const iconMap = {
    success: '✅',
    error: '❌',
    warning: '⚠️',
    info: 'ℹ️'
  };

  toast.innerHTML = `
    <span class="toast-icon">${iconMap[type] || 'ℹ️'}</span>
    <span class="toast-message">${message}</span>
  `;

  toastContainer.appendChild(toast);

  setTimeout(() => toast.classList.add('show'), 10);

  setTimeout(() => {
    toast.classList.remove('show');
    setTimeout(() => toast.remove(), 300);
  }, duration);
}

function createToastContainer() {
  const container = document.createElement('div');
  container.id = 'toastContainer';
  container.style.cssText = `
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
  `;

  document.body.appendChild(container);

  if (!document.getElementById('toastStyles')) {
    const style = document.createElement('style');
    style.id = 'toastStyles';
    style.textContent = `
      .toast {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 20px;
        background: white;
        border-radius: 8px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        opacity: 0;
        transform: translateX(100px);
        transition: all 0.3s ease;
        min-width: 250px;
        max-width: 400px;
      }
      .toast.show {
        opacity: 1;
        transform: translateX(0);
      }
      .toast-success { border-left: 4px solid #10b981; }
      .toast-error { border-left: 4px solid #ef4444; }
      .toast-warning { border-left: 4px solid #f59e0b; }
      .toast-info { border-left: 4px solid #3b82f6; }
      .toast-icon { font-size: 20px; }
      .toast-message { font-size: 14px; color: #374151; }
    `;
    document.head.appendChild(style);
  }

  return container;
}

// ==================== 초기화 ====================

document.addEventListener('DOMContentLoaded', async () => {
  await loadRequests();
  updateStats();
});

// ==================== 데이터 로드 ====================

/**
 * 출입 신청 목록 로드
 */
async function loadRequests() {
  try {
    const filters = currentStatus === 'all' ? {} : { status: currentStatus };
    const queryString = new URLSearchParams(filters).toString();

    const response = await window.apiCall(`/workplace-visits/requests?${queryString}`, 'GET');

    if (response && response.success) {
      requests = response.data || [];
      renderRequestTable();
      updateStats();
    }
  } catch (error) {
    console.error('출입 신청 목록 로드 오류:', error);
    showToast('출입 신청 목록을 불러오는데 실패했습니다.', 'error');
  }
}

/**
 * 통계 업데이트
 */
async function updateStats() {
  try {
    const response = await window.apiCall('/workplace-visits/requests', 'GET');

    if (response && response.success) {
      const allRequests = response.data || [];

      const stats = {
        pending: allRequests.filter(r => r.status === 'pending').length,
        approved: allRequests.filter(r => r.status === 'approved').length,
        training_completed: allRequests.filter(r => r.status === 'training_completed').length,
        rejected: allRequests.filter(r => r.status === 'rejected').length
      };

      document.getElementById('statPending').textContent = stats.pending;
      document.getElementById('statApproved').textContent = stats.approved;
      document.getElementById('statTrainingCompleted').textContent = stats.training_completed;
      document.getElementById('statRejected').textContent = stats.rejected;
    }
  } catch (error) {
    console.error('통계 업데이트 오류:', error);
  }
}

/**
 * 테이블 렌더링
 */
function renderRequestTable() {
  const container = document.getElementById('requestTableContainer');

  if (requests.length === 0) {
    container.innerHTML = `
      <div class="empty-state">
        <div style="font-size: 48px; margin-bottom: 16px;">📭</div>
        <h3>출입 신청이 없습니다</h3>
        <p>현재 ${getStatusText(currentStatus)} 상태의 신청이 없습니다.</p>
      </div>
    `;
    return;
  }

  let html = `
    <table class="request-table">
      <thead>
        <tr>
          <th>신청일</th>
          <th>신청자</th>
          <th>방문자</th>
          <th>인원</th>
          <th>방문 작업장</th>
          <th>방문 일시</th>
          <th>목적</th>
          <th>상태</th>
          <th>작업</th>
        </tr>
      </thead>
      <tbody>
  `;

  requests.forEach(req => {
    const statusText = {
      'pending': '승인 대기',
      'approved': '승인됨',
      'rejected': '반려됨',
      'training_completed': '교육 완료'
    }[req.status] || req.status;

    html += `
      <tr>
        <td>${new Date(req.created_at).toLocaleDateString()}</td>
        <td>${req.requester_full_name || req.requester_name}</td>
        <td>${req.visitor_company}</td>
        <td>${req.visitor_count}명</td>
        <td>${req.category_name} - ${req.workplace_name}</td>
        <td>${req.visit_date} ${req.visit_time}</td>
        <td>${req.purpose_name}</td>
        <td><span class="status-badge ${req.status}">${statusText}</span></td>
        <td>
          <div class="action-buttons">
            <button class="btn btn-sm btn-secondary" onclick="viewDetail(${req.request_id})">상세</button>
            ${req.status === 'pending' ? `
              <button class="btn btn-sm btn-primary" onclick="approveRequest(${req.request_id})">승인</button>
              <button class="btn btn-sm btn-danger" onclick="openRejectModal(${req.request_id})">반려</button>
            ` : ''}
            ${req.status === 'approved' ? `
              <button class="btn btn-sm btn-primary" onclick="startTraining(${req.request_id})">교육 진행</button>
            ` : ''}
          </div>
        </td>
      </tr>
    `;
  });

  html += `
      </tbody>
    </table>
  `;

  container.innerHTML = html;
}

/**
 * 상태 텍스트 변환
 */
function getStatusText(status) {
  const map = {
    'pending': '승인 대기',
    'approved': '승인 완료',
    'rejected': '반려',
    'training_completed': '교육 완료',
    'all': '전체'
  };
  return map[status] || status;
}

// ==================== 탭 전환 ====================

/**
 * 탭 전환
 */
async function switchTab(status) {
  currentStatus = status;

  // 탭 활성화 상태 변경
  document.querySelectorAll('.status-tab').forEach(tab => {
    if (tab.dataset.status === status) {
      tab.classList.add('active');
    } else {
      tab.classList.remove('active');
    }
  });

  await loadRequests();
}

// ==================== 상세보기 ====================

/**
 * 상세보기 모달 열기
 */
async function viewDetail(requestId) {
  try {
    const response = await window.apiCall(`/workplace-visits/requests/${requestId}`, 'GET');

    if (response && response.success) {
      const req = response.data;
      const statusText = {
        'pending': '승인 대기',
        'approved': '승인됨',
        'rejected': '반려됨',
        'training_completed': '교육 완료'
      }[req.status] || req.status;

      let html = `
        <div class="detail-grid">
          <div class="detail-label">신청 번호</div>
          <div class="detail-value">#${req.request_id}</div>

          <div class="detail-label">신청일</div>
          <div class="detail-value">${new Date(req.created_at).toLocaleString()}</div>

          <div class="detail-label">신청자</div>
          <div class="detail-value">${req.requester_full_name || req.requester_name}</div>

          <div class="detail-label">방문자 소속</div>
          <div class="detail-value">${req.visitor_company}</div>

          <div class="detail-label">방문 인원</div>
          <div class="detail-value">${req.visitor_count}명</div>

          <div class="detail-label">방문 구역</div>
          <div class="detail-value">${req.category_name}</div>

          <div class="detail-label">방문 작업장</div>
          <div class="detail-value">${req.workplace_name}</div>

          <div class="detail-label">방문 날짜</div>
          <div class="detail-value">${req.visit_date}</div>

          <div class="detail-label">방문 시간</div>
          <div class="detail-value">${req.visit_time}</div>

          <div class="detail-label">방문 목적</div>
          <div class="detail-value">${req.purpose_name}</div>

          <div class="detail-label">상태</div>
          <div class="detail-value"><span class="status-badge ${req.status}">${statusText}</span></div>
        </div>
      `;

      if (req.notes) {
        html += `
          <div style="margin-top: 16px; padding: 12px; background: var(--gray-50); border-radius: var(--radius-md);">
            <strong>비고:</strong><br>
            ${req.notes}
          </div>
        `;
      }

      if (req.rejection_reason) {
        html += `
          <div style="margin-top: 16px; padding: 12px; background: var(--red-50); border-radius: var(--radius-md); color: var(--red-700);">
            <strong>반려 사유:</strong><br>
            ${req.rejection_reason}
          </div>
        `;
      }

      if (req.approved_by) {
        html += `
          <div style="margin-top: 16px; padding: 12px; background: var(--blue-50); border-radius: var(--radius-md);">
            <strong>처리 정보:</strong><br>
            처리자: ${req.approver_name || 'Unknown'}<br>
            처리 시간: ${new Date(req.approved_at).toLocaleString()}
          </div>
        `;
      }

      document.getElementById('detailContent').innerHTML = html;
      document.getElementById('detailModal').style.display = 'flex';
    }
  } catch (error) {
    console.error('상세 정보 로드 오류:', error);
    showToast('상세 정보를 불러오는데 실패했습니다.', 'error');
  }
}

/**
 * 상세보기 모달 닫기
 */
function closeDetailModal() {
  document.getElementById('detailModal').style.display = 'none';
}

// ==================== 승인/반려 ====================

/**
 * 승인 처리
 */
async function approveRequest(requestId) {
  if (!confirm('이 출입 신청을 승인하시겠습니까?')) {
    return;
  }

  try {
    const response = await window.apiCall(`/workplace-visits/requests/${requestId}/approve`, 'PUT');

    if (response && response.success) {
      showToast('출입 신청이 승인되었습니다.', 'success');
      await loadRequests();
      updateStats();
    } else {
      throw new Error(response?.message || '승인 실패');
    }
  } catch (error) {
    console.error('승인 처리 오류:', error);
    showToast(error.message || '승인 처리 중 오류가 발생했습니다.', 'error');
  }
}

/**
 * 반려 모달 열기
 */
function openRejectModal(requestId) {
  currentRejectRequestId = requestId;
  document.getElementById('rejectionReason').value = '';
  document.getElementById('rejectModal').style.display = 'flex';
}

/**
 * 반려 모달 닫기
 */
function closeRejectModal() {
  currentRejectRequestId = null;
  document.getElementById('rejectModal').style.display = 'none';
}

/**
 * 반려 확정
 */
async function confirmReject() {
  const reason = document.getElementById('rejectionReason').value.trim();

  if (!reason) {
    showToast('반려 사유를 입력해주세요.', 'warning');
    return;
  }

  try {
    const response = await window.apiCall(
      `/workplace-visits/requests/${currentRejectRequestId}/reject`,
      'PUT',
      { rejection_reason: reason }
    );

    if (response && response.success) {
      showToast('출입 신청이 반려되었습니다.', 'success');
      closeRejectModal();
      await loadRequests();
      updateStats();
    } else {
      throw new Error(response?.message || '반려 실패');
    }
  } catch (error) {
    console.error('반려 처리 오류:', error);
    showToast(error.message || '반려 처리 중 오류가 발생했습니다.', 'error');
  }
}

// ==================== 안전교육 진행 ====================

/**
 * 안전교육 진행 페이지로 이동
 */
function startTraining(requestId) {
  window.location.href = `/pages/safety/training-conduct.html?request_id=${requestId}`;
}

// 전역 함수로 노출
window.showToast = showToast;
window.switchTab = switchTab;
window.viewDetail = viewDetail;
window.closeDetailModal = closeDetailModal;
window.approveRequest = approveRequest;
window.openRejectModal = openRejectModal;
window.closeRejectModal = closeRejectModal;
window.confirmReject = confirmReject;
window.startTraining = startTraining;