/**
 * 신고 상세 페이지 JavaScript
 */

const API_BASE = window.API_BASE_URL || 'http://localhost:20005/api';

let reportId = null;
let reportData = null;
let currentUser = null;

// 상태 한글명
const statusNames = {
  reported: '신고',
  received: '접수',
  in_progress: '처리중',
  completed: '완료',
  closed: '종료'
};

// 유형 한글명
const typeNames = {
  nonconformity: '부적합',
  safety: '안전'
};

// 심각도 한글명
const severityNames = {
  critical: '심각',
  high: '높음',
  medium: '보통',
  low: '낮음'
};

// 초기화
document.addEventListener('DOMContentLoaded', async () => {
  // URL에서 ID 가져오기
  const urlParams = new URLSearchParams(window.location.search);
  reportId = urlParams.get('id');

  if (!reportId) {
    alert('신고 ID가 없습니다.');
    goBackToList();
    return;
  }

  // 현재 사용자 정보 로드
  await loadCurrentUser();

  // 상세 데이터 로드
  await loadReportDetail();
});

/**
 * 현재 사용자 정보 로드
 */
async function loadCurrentUser() {
  try {
    const response = await fetch(`${API_BASE}/users/me`, {
      headers: { 'Authorization': `Bearer ${localStorage.getItem('token')}` }
    });

    if (response.ok) {
      const data = await response.json();
      currentUser = data.data;
    }
  } catch (error) {
    console.error('사용자 정보 로드 실패:', error);
  }
}

/**
 * 신고 상세 로드
 */
async function loadReportDetail() {
  try {
    const response = await fetch(`${API_BASE}/work-issues/${reportId}`, {
      headers: { 'Authorization': `Bearer ${localStorage.getItem('token')}` }
    });

    if (!response.ok) {
      throw new Error('신고를 찾을 수 없습니다.');
    }

    const data = await response.json();
    if (!data.success) {
      throw new Error(data.error || '데이터 조회 실패');
    }

    reportData = data.data;
    renderDetail();
    await loadStatusLogs();

  } catch (error) {
    console.error('상세 로드 실패:', error);
    alert(error.message);
    goBackToList();
  }
}

/**
 * 상세 정보 렌더링
 */
function renderDetail() {
  const d = reportData;

  // 헤더
  document.getElementById('reportId').textContent = `#${d.report_id}`;
  document.getElementById('reportTitle').textContent = d.issue_item_name || d.issue_category_name || '신고';

  // 상태 배지
  const statusBadge = document.getElementById('statusBadge');
  statusBadge.className = `status-badge ${d.status}`;
  statusBadge.textContent = statusNames[d.status] || d.status;

  // 기본 정보
  renderBasicInfo(d);

  // 신고 내용
  renderIssueContent(d);

  // 사진
  renderPhotos(d);

  // 처리 정보
  renderProcessInfo(d);

  // 액션 버튼
  renderActionButtons(d);
}

/**
 * 기본 정보 렌더링
 */
function renderBasicInfo(d) {
  const container = document.getElementById('basicInfo');

  const formatDate = (dateStr) => {
    if (!dateStr) return '-';
    const date = new Date(dateStr);
    return date.toLocaleDateString('ko-KR', {
      year: 'numeric',
      month: '2-digit',
      day: '2-digit',
      hour: '2-digit',
      minute: '2-digit'
    });
  };

  const validTypes = ['nonconformity', 'safety'];
  const safeType = validTypes.includes(d.category_type) ? d.category_type : '';
  const reporterName = escapeHtml(d.reporter_full_name || d.reporter_name || '-');
  const locationText = escapeHtml(d.custom_location || d.workplace_name || '-');
  const factoryText = d.factory_name ? ` (${escapeHtml(d.factory_name)})` : '';

  container.innerHTML = `
    <div class="info-item">
      <div class="info-label">신고 유형</div>
      <div class="info-value">
        <span class="type-badge ${safeType}">${typeNames[d.category_type] || escapeHtml(d.category_type || '-')}</span>
      </div>
    </div>
    <div class="info-item">
      <div class="info-label">신고일시</div>
      <div class="info-value">${formatDate(d.report_date)}</div>
    </div>
    <div class="info-item">
      <div class="info-label">신고자</div>
      <div class="info-value">${reporterName}</div>
    </div>
    <div class="info-item">
      <div class="info-label">위치</div>
      <div class="info-value">${locationText}${factoryText}</div>
    </div>
  `;
}

/**
 * 신고 내용 렌더링
 */
function renderIssueContent(d) {
  const container = document.getElementById('issueContent');

  const validSeverities = ['critical', 'high', 'medium', 'low'];
  const safeSeverity = validSeverities.includes(d.severity) ? d.severity : '';

  let html = `
    <div class="info-grid" style="margin-bottom: 1rem;">
      <div class="info-item">
        <div class="info-label">카테고리</div>
        <div class="info-value">${escapeHtml(d.issue_category_name || '-')}</div>
      </div>
      <div class="info-item">
        <div class="info-label">항목</div>
        <div class="info-value">
          ${escapeHtml(d.issue_item_name || '-')}
          ${d.severity ? `<span class="severity-badge ${safeSeverity}">${severityNames[d.severity] || escapeHtml(d.severity)}</span>` : ''}
        </div>
      </div>
    </div>
  `;

  if (d.additional_description) {
    html += `
      <div style="padding: 1rem; background: #f9fafb; border-radius: 0.5rem; white-space: pre-wrap; line-height: 1.6;">
        ${escapeHtml(d.additional_description)}
      </div>
    `;
  }

  container.innerHTML = html;
}

/**
 * 사진 렌더링
 */
function renderPhotos(d) {
  const section = document.getElementById('photoSection');
  const gallery = document.getElementById('photoGallery');

  const photos = [d.photo_path1, d.photo_path2, d.photo_path3, d.photo_path4, d.photo_path5].filter(Boolean);

  if (photos.length === 0) {
    section.style.display = 'none';
    return;
  }

  section.style.display = 'block';

  const baseUrl = (API_BASE).replace('/api', '');

  gallery.innerHTML = photos.map(photo => {
    const fullUrl = photo.startsWith('http') ? photo : `${baseUrl}${photo}`;
    return `
      <div class="photo-item" onclick="openPhotoModal('${fullUrl}')">
        <img src="${fullUrl}" alt="첨부 사진">
      </div>
    `;
  }).join('');
}

/**
 * 처리 정보 렌더링
 */
function renderProcessInfo(d) {
  const section = document.getElementById('processSection');
  const container = document.getElementById('processInfo');

  // 담당자 배정 또는 처리 정보가 있는 경우만 표시
  if (!d.assigned_user_id && !d.resolution_notes) {
    section.style.display = 'none';
    return;
  }

  section.style.display = 'block';

  const formatDate = (dateStr) => {
    if (!dateStr) return '-';
    const date = new Date(dateStr);
    return date.toLocaleDateString('ko-KR', {
      year: 'numeric',
      month: '2-digit',
      day: '2-digit',
      hour: '2-digit',
      minute: '2-digit'
    });
  };

  let html = '<div class="info-grid">';

  if (d.assigned_user_id) {
    html += `
      <div class="info-item">
        <div class="info-label">담당자</div>
        <div class="info-value">${escapeHtml(d.assigned_full_name || d.assigned_user_name || '-')}</div>
      </div>
      <div class="info-item">
        <div class="info-label">담당 부서</div>
        <div class="info-value">${escapeHtml(d.assigned_department || '-')}</div>
      </div>
    `;
  }

  if (d.resolved_at) {
    html += `
      <div class="info-item">
        <div class="info-label">처리 완료일</div>
        <div class="info-value">${formatDate(d.resolved_at)}</div>
      </div>
      <div class="info-item">
        <div class="info-label">처리자</div>
        <div class="info-value">${escapeHtml(d.resolved_by_name || '-')}</div>
      </div>
    `;
  }

  html += '</div>';

  if (d.resolution_notes) {
    html += `
      <div style="margin-top: 1rem; padding: 1rem; background: #ecfdf5; border-radius: 0.5rem; border: 1px solid #a7f3d0;">
        <div style="font-weight: 600; margin-bottom: 0.5rem; color: #047857;">처리 내용</div>
        <div style="white-space: pre-wrap; line-height: 1.6;">${escapeHtml(d.resolution_notes)}</div>
      </div>
    `;
  }

  container.innerHTML = html;
}

/**
 * 액션 버튼 렌더링
 */
function renderActionButtons(d) {
  const container = document.getElementById('actionButtons');

  if (!currentUser) {
    container.innerHTML = '';
    return;
  }

  const isAdmin = ['admin', 'system', 'support_team'].includes(currentUser.access_level);
  const isOwner = d.reporter_id === currentUser.user_id;
  const isAssignee = d.assigned_user_id === currentUser.user_id;

  let buttons = [];

  // 관리자 권한 버튼
  if (isAdmin) {
    if (d.status === 'reported') {
      buttons.push(`<button class="action-btn primary" onclick="receiveReport()">접수하기</button>`);
    }

    if (d.status === 'received' || d.status === 'in_progress') {
      buttons.push(`<button class="action-btn" onclick="openAssignModal()">담당자 배정</button>`);
    }

    if (d.status === 'received') {
      buttons.push(`<button class="action-btn primary" onclick="startProcessing()">처리 시작</button>`);
    }

    if (d.status === 'in_progress') {
      buttons.push(`<button class="action-btn success" onclick="openCompleteModal()">처리 완료</button>`);
    }

    if (d.status === 'completed') {
      buttons.push(`<button class="action-btn" onclick="closeReport()">종료</button>`);
    }
  }

  // 담당자 버튼
  if (isAssignee && !isAdmin) {
    if (d.status === 'received') {
      buttons.push(`<button class="action-btn primary" onclick="startProcessing()">처리 시작</button>`);
    }

    if (d.status === 'in_progress') {
      buttons.push(`<button class="action-btn success" onclick="openCompleteModal()">처리 완료</button>`);
    }
  }

  // 신고자 버튼 (수정/삭제는 reported 상태에서만)
  if (isOwner && d.status === 'reported') {
    buttons.push(`<button class="action-btn danger" onclick="deleteReport()">삭제</button>`);
  }

  container.innerHTML = buttons.join('');
}

/**
 * 상태 변경 이력 로드
 */
async function loadStatusLogs() {
  try {
    const response = await fetch(`${API_BASE}/work-issues/${reportId}/status-logs`, {
      headers: { 'Authorization': `Bearer ${localStorage.getItem('token')}` }
    });

    if (!response.ok) return;

    const data = await response.json();
    if (data.success && data.data) {
      renderStatusTimeline(data.data);
    }
  } catch (error) {
    console.error('상태 이력 로드 실패:', error);
  }
}

/**
 * 상태 타임라인 렌더링
 */
function renderStatusTimeline(logs) {
  const container = document.getElementById('statusTimeline');

  if (!logs || logs.length === 0) {
    container.innerHTML = '<p style="color: #6b7280;">상태 변경 이력이 없습니다.</p>';
    return;
  }

  const formatDate = (dateStr) => {
    const date = new Date(dateStr);
    return date.toLocaleDateString('ko-KR', {
      year: 'numeric',
      month: '2-digit',
      day: '2-digit',
      hour: '2-digit',
      minute: '2-digit'
    });
  };

  container.innerHTML = logs.map(log => `
    <div class="timeline-item">
      <div class="timeline-status">
        ${log.previous_status ? `${statusNames[log.previous_status] || escapeHtml(log.previous_status)} → ` : ''}${statusNames[log.new_status] || escapeHtml(log.new_status)}
      </div>
      <div class="timeline-meta">
        ${escapeHtml(log.changed_by_full_name || log.changed_by_name || '-')} | ${formatDate(log.changed_at)}
        ${log.change_reason ? `<br><small>${escapeHtml(log.change_reason)}</small>` : ''}
      </div>
    </div>
  `).join('');
}

// ==================== 액션 함수 ====================

/**
 * 신고 접수
 */
async function receiveReport() {
  if (!confirm('이 신고를 접수하시겠습니까?')) return;

  try {
    const response = await fetch(`${API_BASE}/work-issues/${reportId}/receive`, {
      method: 'POST',
      headers: { 'Authorization': `Bearer ${localStorage.getItem('token')}` }
    });

    const data = await response.json();

    if (data.success) {
      alert('신고가 접수되었습니다.');
      location.reload();
    } else {
      throw new Error(data.error || '접수 실패');
    }
  } catch (error) {
    alert('접수 실패: ' + error.message);
  }
}

/**
 * 처리 시작
 */
async function startProcessing() {
  if (!confirm('처리를 시작하시겠습니까?')) return;

  try {
    const response = await fetch(`${API_BASE}/work-issues/${reportId}/start`, {
      method: 'POST',
      headers: { 'Authorization': `Bearer ${localStorage.getItem('token')}` }
    });

    const data = await response.json();

    if (data.success) {
      alert('처리가 시작되었습니다.');
      location.reload();
    } else {
      throw new Error(data.error || '처리 시작 실패');
    }
  } catch (error) {
    alert('처리 시작 실패: ' + error.message);
  }
}

/**
 * 신고 종료
 */
async function closeReport() {
  if (!confirm('이 신고를 종료하시겠습니까?')) return;

  try {
    const response = await fetch(`${API_BASE}/work-issues/${reportId}/close`, {
      method: 'POST',
      headers: { 'Authorization': `Bearer ${localStorage.getItem('token')}` }
    });

    const data = await response.json();

    if (data.success) {
      alert('신고가 종료되었습니다.');
      location.reload();
    } else {
      throw new Error(data.error || '종료 실패');
    }
  } catch (error) {
    alert('종료 실패: ' + error.message);
  }
}

/**
 * 신고 삭제
 */
async function deleteReport() {
  if (!confirm('정말 이 신고를 삭제하시겠습니까? 이 작업은 되돌릴 수 없습니다.')) return;

  try {
    const response = await fetch(`${API_BASE}/work-issues/${reportId}`, {
      method: 'DELETE',
      headers: { 'Authorization': `Bearer ${localStorage.getItem('token')}` }
    });

    const data = await response.json();

    if (data.success) {
      alert('신고가 삭제되었습니다.');
      goBackToList();
    } else {
      throw new Error(data.error || '삭제 실패');
    }
  } catch (error) {
    alert('삭제 실패: ' + error.message);
  }
}

// ==================== 담당자 배정 모달 ====================

async function openAssignModal() {
  // 사용자 목록 로드
  try {
    const response = await fetch(`${API_BASE}/users`, {
      headers: { 'Authorization': `Bearer ${localStorage.getItem('token')}` }
    });

    if (response.ok) {
      const data = await response.json();
      const select = document.getElementById('assignUser');
      select.innerHTML = '<option value="">담당자 선택</option>';

      if (data.success && data.data) {
        data.data.forEach(user => {
          const safeUserId = parseInt(user.user_id) || 0;
          select.innerHTML += `<option value="${safeUserId}">${escapeHtml(user.name || '-')} (${escapeHtml(user.username || '-')})</option>`;
        });
      }
    }
  } catch (error) {
    console.error('사용자 목록 로드 실패:', error);
  }

  document.getElementById('assignModal').classList.add('visible');
}

function closeAssignModal() {
  document.getElementById('assignModal').classList.remove('visible');
}

async function submitAssign() {
  const department = document.getElementById('assignDepartment').value;
  const userId = document.getElementById('assignUser').value;

  if (!userId) {
    alert('담당자를 선택해주세요.');
    return;
  }

  try {
    const response = await fetch(`${API_BASE}/work-issues/${reportId}/assign`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${localStorage.getItem('token')}`
      },
      body: JSON.stringify({
        assigned_department: department,
        assigned_user_id: parseInt(userId)
      })
    });

    const data = await response.json();

    if (data.success) {
      alert('담당자가 배정되었습니다.');
      closeAssignModal();
      location.reload();
    } else {
      throw new Error(data.error || '배정 실패');
    }
  } catch (error) {
    alert('담당자 배정 실패: ' + error.message);
  }
}

// ==================== 처리 완료 모달 ====================

function openCompleteModal() {
  document.getElementById('completeModal').classList.add('visible');
}

function closeCompleteModal() {
  document.getElementById('completeModal').classList.remove('visible');
}

async function submitComplete() {
  const notes = document.getElementById('resolutionNotes').value;

  if (!notes.trim()) {
    alert('처리 내용을 입력해주세요.');
    return;
  }

  try {
    const response = await fetch(`${API_BASE}/work-issues/${reportId}/complete`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${localStorage.getItem('token')}`
      },
      body: JSON.stringify({
        resolution_notes: notes
      })
    });

    const data = await response.json();

    if (data.success) {
      alert('처리가 완료되었습니다.');
      closeCompleteModal();
      location.reload();
    } else {
      throw new Error(data.error || '완료 처리 실패');
    }
  } catch (error) {
    alert('처리 완료 실패: ' + error.message);
  }
}

// ==================== 사진 모달 ====================

function openPhotoModal(src) {
  document.getElementById('photoModalImg').src = src;
  document.getElementById('photoModal').classList.add('visible');
}

function closePhotoModal() {
  document.getElementById('photoModal').classList.remove('visible');
}

// ==================== 유틸리티 ====================

function escapeHtml(text) {
  const div = document.createElement('div');
  div.textContent = text;
  return div.innerHTML;
}

/**
 * 목록으로 돌아가기
 */
function goBackToList() {
  const urlParams = new URLSearchParams(window.location.search);
  const from = urlParams.get('from');

  if (from === 'nonconformity') {
    window.location.href = '/pages/work/nonconformity.html';
  } else if (from === 'safety') {
    window.location.href = '/pages/safety/report-status.html';
  } else {
    if (window.history.length > 1) {
      window.history.back();
    } else {
      window.location.href = '/pages/safety/report-status.html';
    }
  }
}

// 전역 함수 노출
window.goBackToList = goBackToList;
window.receiveReport = receiveReport;
window.startProcessing = startProcessing;
window.closeReport = closeReport;
window.deleteReport = deleteReport;
window.openAssignModal = openAssignModal;
window.closeAssignModal = closeAssignModal;
window.submitAssign = submitAssign;
window.openCompleteModal = openCompleteModal;
window.closeCompleteModal = closeCompleteModal;
window.submitComplete = submitComplete;
window.openPhotoModal = openPhotoModal;
window.closePhotoModal = closePhotoModal;