/* ===== 위험성평가 모듈 ===== */

const PRODUCT_TYPES = ['PKG', 'VESSEL', 'HX', 'SKID'];
const STATUS_LABELS = { draft: '작성중', in_progress: '진행중', completed: '완료' };
const STATUS_BADGE = { draft: 'badge-gray', in_progress: 'badge-amber', completed: 'badge-green' };
const TYPE_LABELS = { regular: '정기', adhoc: '수시' };
const MITIGATION_STATUS = { planned: '계획', in_progress: '진행중', completed: '완료' };

function riskLevelClass(score) {
  if (!score) return '';
  if (score <= 4) return 'badge-risk-low';
  if (score <= 9) return 'badge-risk-moderate';
  if (score <= 15) return 'badge-risk-substantial';
  return 'badge-risk-high';
}
function riskLevelLabel(score) {
  if (!score) return '-';
  if (score <= 4) return '저';
  if (score <= 9) return '보통';
  if (score <= 15) return '상당';
  return '높음';
}

// ==================== 프로젝트 목록 페이지 ====================

async function initRiskProjectsPage() {
  if (!initAuth()) return;
  await loadProjects();
}

async function loadProjects() {
  try {
    const params = new URLSearchParams();
    const typeFilter = document.getElementById('filterType')?.value;
    const yearFilter = document.getElementById('filterYear')?.value;
    const productFilter = document.getElementById('filterProduct')?.value;
    const statusFilter = document.getElementById('filterStatus')?.value;
    if (typeFilter) params.set('assessment_type', typeFilter);
    if (yearFilter) params.set('year', yearFilter);
    if (productFilter) params.set('product_type', productFilter);
    if (statusFilter) params.set('status', statusFilter);

    const res = await api('/risk/projects?' + params.toString());
    const { projects } = res.data;
    renderProjectTable(projects);
  } catch (err) {
    console.error(err);
    showToast('프로젝트 목록을 불러올 수 없습니다', 'error');
  }
}

function renderProjectTable(projects) {
  const tbody = document.getElementById('projectTableBody');
  if (!tbody) return;
  if (!projects.length) {
    tbody.innerHTML = '<tr><td colspan="8" class="text-center text-gray-400 py-8">프로젝트가 없습니다</td></tr>';
    return;
  }
  tbody.innerHTML = projects.map(p => `
    <tr class="cursor-pointer hover:bg-blue-50" onclick="location.href='risk-assess.html?id=${p.id}'">
      <td class="px-3 py-2">${escapeHtml(p.title)}</td>
      <td class="px-3 py-2 text-center"><span class="badge ${p.assessment_type === 'regular' ? 'badge-blue' : 'badge-amber'}">${TYPE_LABELS[p.assessment_type]}</span></td>
      <td class="px-3 py-2 text-center">${p.product_type}</td>
      <td class="px-3 py-2 text-center">${p.year}${p.month ? '/' + p.month : ''}</td>
      <td class="px-3 py-2 text-center"><span class="badge ${STATUS_BADGE[p.status]}">${STATUS_LABELS[p.status]}</span></td>
      <td class="px-3 py-2 text-center">${p.total_items || 0}</td>
      <td class="px-3 py-2 text-center">${p.high_risk_count ? `<span class="badge badge-risk-high">${p.high_risk_count}</span>` : '-'}</td>
      <td class="px-3 py-2 text-center whitespace-nowrap">
        <a href="/api/risk/projects/${p.id}/export" class="text-green-600 hover:text-green-800 mr-2" title="Excel 다운로드" onclick="event.stopPropagation()">
          <i class="fas fa-file-excel"></i>
        </a>
      </td>
    </tr>
  `).join('');
}

function openNewProjectModal() {
  document.getElementById('projectModal').classList.remove('hidden');
  document.getElementById('projectForm').reset();
  document.getElementById('projectYear').value = new Date().getFullYear();
}
function closeProjectModal() {
  document.getElementById('projectModal').classList.add('hidden');
}

async function submitProject(e) {
  e.preventDefault();
  const data = {
    title: document.getElementById('projectTitle').value.trim(),
    assessment_type: document.getElementById('projectAssessType').value,
    product_type: document.getElementById('projectProductType').value,
    year: parseInt(document.getElementById('projectYear').value),
    month: document.getElementById('projectMonth').value ? parseInt(document.getElementById('projectMonth').value) : null,
    assessed_by: document.getElementById('projectAssessedBy').value.trim() || null
  };
  if (!data.title) return showToast('제목을 입력하세요', 'error');

  try {
    const res = await api('/risk/projects', {
      method: 'POST',
      body: JSON.stringify(data)
    });
    showToast('프로젝트가 생성되었습니다');
    closeProjectModal();
    location.href = 'risk-assess.html?id=' + res.data.id;
  } catch (err) {
    showToast(err.message, 'error');
  }
}

// ==================== 평가 수행 페이지 ====================

let riskProject = null;

async function initRiskAssessPage() {
  if (!initAuth()) return;
  const id = new URLSearchParams(location.search).get('id');
  if (!id) { location.href = 'risk-projects.html'; return; }
  await loadProject(id);
}

async function loadProject(id) {
  try {
    const res = await api('/risk/projects/' + id);
    riskProject = res.data;
    renderProjectHeader();
    renderProcesses();
    renderMitigations();
  } catch (err) {
    console.error(err);
    showToast('프로젝트를 불러올 수 없습니다', 'error');
  }
}

function renderProjectHeader() {
  const el = document.getElementById('projectHeader');
  if (!el) return;
  const p = riskProject;
  el.innerHTML = `
    <div class="flex flex-wrap items-center justify-between gap-3">
      <div>
        <h2 class="text-lg font-bold text-gray-800">${escapeHtml(p.title)}</h2>
        <div class="flex flex-wrap gap-2 mt-1 text-sm text-gray-500">
          <span class="badge ${p.assessment_type === 'regular' ? 'badge-blue' : 'badge-amber'}">${TYPE_LABELS[p.assessment_type]}</span>
          <span>${p.product_type}</span>
          <span>${p.year}년${p.month ? ' ' + p.month + '월' : ''}</span>
          <span class="badge ${STATUS_BADGE[p.status]}">${STATUS_LABELS[p.status]}</span>
          ${p.assessed_by ? `<span>평가자: ${escapeHtml(p.assessed_by)}</span>` : ''}
        </div>
      </div>
      <div class="flex gap-2">
        <select id="projectStatusSelect" onchange="changeProjectStatus(this.value)"
                class="input-field px-3 py-1.5 rounded-lg text-sm">
          <option value="draft" ${p.status==='draft'?'selected':''}>작성중</option>
          <option value="in_progress" ${p.status==='in_progress'?'selected':''}>진행중</option>
          <option value="completed" ${p.status==='completed'?'selected':''}>완료</option>
        </select>
        <a href="/api/risk/projects/${p.id}/export"
           class="px-4 py-1.5 bg-green-600 text-white rounded-lg text-sm hover:bg-green-700 inline-flex items-center gap-1">
          <i class="fas fa-file-excel"></i> Excel
        </a>
      </div>
    </div>`;
}

async function changeProjectStatus(status) {
  try {
    await api('/risk/projects/' + riskProject.id, {
      method: 'PATCH', body: JSON.stringify({ status })
    });
    riskProject.status = status;
    renderProjectHeader();
    showToast('상태가 변경되었습니다');
  } catch (err) { showToast(err.message, 'error'); }
}

// ==================== 세부 공정 + 평가 항목 ====================

function renderProcesses() {
  const container = document.getElementById('processContainer');
  if (!container) return;
  const processes = riskProject.processes || [];

  if (!processes.length) {
    container.innerHTML = `<div class="bg-white rounded-xl shadow-sm p-8 text-center text-gray-400">
      세부 공정이 없습니다. ${riskProject.assessment_type === 'adhoc' ? '<button onclick="openAddProcessModal()" class="text-blue-500 hover:underline ml-1">공정 추가</button>' : ''}
    </div>`;
    return;
  }

  container.innerHTML = processes.map((proc, idx) => `
    <div class="bg-white rounded-xl shadow-sm mb-4 overflow-hidden">
      <button onclick="toggleProcess(${idx})" class="w-full risk-section-header px-4 py-3 flex items-center justify-between text-left">
        <span><i class="fas fa-caret-right mr-2 process-caret" id="caret-${idx}"></i>${escapeHtml(proc.process_name)}</span>
        <span class="text-xs text-gray-500">${(proc.items||[]).length}건</span>
      </button>
      <div id="process-${idx}" class="hidden">
        <div class="overflow-x-auto">
          <table class="risk-table w-full text-sm">
            <thead>
              <tr>
                <th class="w-10">No</th><th>분류</th><th>원인(작업)</th><th>유해·위험요인</th>
                <th>관련법규</th><th>현재 안전조치</th><th class="w-12">가능성</th><th class="w-12">중대성</th>
                <th class="w-14">위험성</th><th>대책No</th><th>세부내용</th><th class="w-16">작업</th>
              </tr>
            </thead>
            <tbody id="items-${proc.id}">
              ${renderItems(proc.items || [], proc.id)}
            </tbody>
          </table>
        </div>
        <div class="p-3 border-t">
          <button onclick="openItemModal(${proc.id})" class="px-3 py-1.5 bg-blue-600 text-white rounded text-xs hover:bg-blue-700">
            <i class="fas fa-plus mr-1"></i>항목 추가
          </button>
        </div>
      </div>
    </div>
  `).join('');

  // 첫 번째 공정 자동 열기
  if (processes.length > 0) toggleProcess(0);
}

function renderItems(items, processId) {
  if (!items.length) return '<tr><td colspan="12" class="text-center text-gray-400 py-4">항목이 없습니다</td></tr>';
  return items.map((item, idx) => `
    <tr>
      <td class="text-center">${idx + 1}</td>
      <td>${escapeHtml(item.category || '')}</td>
      <td>${escapeHtml(item.cause || '')}</td>
      <td>${escapeHtml(item.hazard || '')}</td>
      <td>${escapeHtml(item.regulation || '')}</td>
      <td>${escapeHtml(item.current_measure || '')}</td>
      <td class="text-center">${item.likelihood || ''}</td>
      <td class="text-center">${item.severity || ''}</td>
      <td class="text-center"><span class="badge ${riskLevelClass(item.risk_score)}">${item.risk_score || ''}</span></td>
      <td class="text-center">${escapeHtml(item.mitigation_no || '')}</td>
      <td>${escapeHtml(item.detail || '')}</td>
      <td class="text-center whitespace-nowrap">
        <button onclick="openItemModal(${processId}, ${item.id})" class="text-blue-500 hover:text-blue-700 mr-1" title="수정"><i class="fas fa-edit"></i></button>
        <button onclick="deleteItemConfirm(${item.id})" class="text-red-400 hover:text-red-600" title="삭제"><i class="fas fa-trash"></i></button>
      </td>
    </tr>
  `).join('');
}

function toggleProcess(idx) {
  const el = document.getElementById('process-' + idx);
  const caret = document.getElementById('caret-' + idx);
  if (!el) return;
  const isOpen = !el.classList.contains('hidden');
  el.classList.toggle('hidden');
  if (caret) caret.style.transform = isOpen ? '' : 'rotate(90deg)';
}

// ==================== 항목 모달 ====================

let editingItemId = null;
let editingProcessId = null;

function openItemModal(processId, itemId) {
  editingProcessId = processId;
  editingItemId = itemId || null;
  const modal = document.getElementById('riskItemModal');
  modal.classList.remove('hidden');
  document.getElementById('riskItemModalTitle').textContent = itemId ? '항목 수정' : '항목 추가';
  const form = document.getElementById('riskItemForm');
  form.reset();

  if (itemId) {
    // 기존 데이터 채우기
    let item = null;
    for (const proc of riskProject.processes) {
      item = (proc.items || []).find(i => i.id === itemId);
      if (item) break;
    }
    if (item) {
      document.getElementById('riCategory').value = item.category || '';
      document.getElementById('riCause').value = item.cause || '';
      document.getElementById('riHazard').value = item.hazard || '';
      document.getElementById('riRegulation').value = item.regulation || '';
      document.getElementById('riCurrentMeasure').value = item.current_measure || '';
      document.getElementById('riLikelihood').value = item.likelihood || '';
      document.getElementById('riSeverity').value = item.severity || '';
      document.getElementById('riMitigationNo').value = item.mitigation_no || '';
      document.getElementById('riDetail').value = item.detail || '';
    }
  }
}
function closeItemModal() {
  document.getElementById('riskItemModal').classList.add('hidden');
  editingItemId = null;
  editingProcessId = null;
}

async function submitItem(e) {
  e.preventDefault();
  const data = {
    category: document.getElementById('riCategory').value.trim() || null,
    cause: document.getElementById('riCause').value.trim() || null,
    hazard: document.getElementById('riHazard').value.trim() || null,
    regulation: document.getElementById('riRegulation').value.trim() || null,
    current_measure: document.getElementById('riCurrentMeasure').value.trim() || null,
    likelihood: document.getElementById('riLikelihood').value ? parseInt(document.getElementById('riLikelihood').value) : null,
    severity: document.getElementById('riSeverity').value ? parseInt(document.getElementById('riSeverity').value) : null,
    mitigation_no: document.getElementById('riMitigationNo').value.trim() || null,
    detail: document.getElementById('riDetail').value.trim() || null,
  };

  try {
    if (editingItemId) {
      await api('/risk/items/' + editingItemId, { method: 'PATCH', body: JSON.stringify(data) });
      showToast('항목이 수정되었습니다');
    } else {
      await api('/risk/processes/' + editingProcessId + '/items', { method: 'POST', body: JSON.stringify(data) });
      showToast('항목이 추가되었습니다');
    }
    closeItemModal();
    await loadProject(riskProject.id);
  } catch (err) { showToast(err.message, 'error'); }
}

async function deleteItemConfirm(itemId) {
  if (!confirm('이 항목을 삭제하시겠습니까?')) return;
  try {
    await api('/risk/items/' + itemId, { method: 'DELETE' });
    showToast('항목이 삭제되었습니다');
    await loadProject(riskProject.id);
  } catch (err) { showToast(err.message, 'error'); }
}

// ==================== 공정 추가 (수시 평가용) ====================

function openAddProcessModal() {
  const name = prompt('추가할 공정명을 입력하세요:');
  if (!name || !name.trim()) return;
  addProcessToProject(name.trim());
}

async function addProcessToProject(processName) {
  try {
    await api('/risk/projects/' + riskProject.id + '/processes', {
      method: 'POST', body: JSON.stringify({ process_name: processName })
    });
    showToast('공정이 추가되었습니다');
    await loadProject(riskProject.id);
  } catch (err) { showToast(err.message, 'error'); }
}

// ==================== 감소대책 ====================

function renderMitigations() {
  const container = document.getElementById('mitigationContainer');
  if (!container) return;
  const mitigations = riskProject.mitigations || [];

  container.innerHTML = `
    <div class="flex items-center justify-between mb-3">
      <h3 class="text-base font-semibold text-gray-800"><i class="fas fa-shield-alt text-blue-500 mr-2"></i>감소대책 수립 및 실행</h3>
      <button onclick="openMitigationModal()" class="px-3 py-1.5 bg-blue-600 text-white rounded-lg text-xs hover:bg-blue-700">
        <i class="fas fa-plus mr-1"></i>대책 추가
      </button>
    </div>
    ${mitigations.length === 0 ? '<div class="text-center text-gray-400 py-6">감소대책이 없습니다</div>' :
      `<div class="grid grid-cols-1 md:grid-cols-2 gap-4">${mitigations.map(m => renderMitigationCard(m)).join('')}</div>`}
  `;
}

function renderMitigationCard(m) {
  return `
    <div class="bg-white border rounded-xl p-4 shadow-sm">
      <div class="flex items-start justify-between mb-2">
        <div class="flex items-center gap-2">
          <span class="text-lg font-bold text-blue-600">#${escapeHtml(m.mitigation_no)}</span>
          <span class="badge ${STATUS_BADGE[m.status] || 'badge-gray'}">${MITIGATION_STATUS[m.status] || m.status}</span>
        </div>
        <button onclick="openMitigationModal(${m.id})" class="text-blue-500 hover:text-blue-700 text-sm"><i class="fas fa-edit"></i></button>
      </div>
      <div class="text-sm space-y-1 text-gray-600">
        <div><strong>유해·위험요인:</strong> ${escapeHtml(m.hazard_summary || '-')}</div>
        <div><strong>현재 위험성:</strong> <span class="badge ${riskLevelClass(m.current_risk_score)}">${m.current_risk_score || '-'}</span></div>
        <div><strong>개선계획:</strong> ${escapeHtml(m.improvement_plan || '-')}</div>
        <div class="flex gap-4">
          <span><strong>담당:</strong> ${escapeHtml(m.manager || '-')}</span>
          <span><strong>예산:</strong> ${escapeHtml(m.budget || '-')}</span>
          <span><strong>일정:</strong> ${escapeHtml(m.schedule || '-')}</span>
        </div>
        ${m.completion_date ? `<div><strong>완료일:</strong> ${formatDate(m.completion_date)}</div>` : ''}
        ${m.post_risk_score ? `<div><strong>대책 후 위험성:</strong> <span class="badge ${riskLevelClass(m.post_risk_score)}">${m.post_risk_score} (${m.post_likelihood}×${m.post_severity})</span></div>` : ''}
      </div>
      <div class="mt-3 pt-3 border-t">
        <form onsubmit="uploadMitigationPhoto(event, ${m.id})" class="flex items-center gap-2">
          <input type="file" accept="image/*" class="text-xs flex-1" id="photoInput-${m.id}">
          <button type="submit" class="px-2 py-1 bg-gray-100 rounded text-xs hover:bg-gray-200"><i class="fas fa-upload"></i></button>
        </form>
        ${m.completion_photo ? `<img src="${m.completion_photo}" class="mt-2 rounded max-h-32 object-cover" alt="완료사진">` : ''}
      </div>
    </div>`;
}

// ==================== 감소대책 모달 ====================

let editingMitigationId = null;

function openMitigationModal(mitigationId) {
  editingMitigationId = mitigationId || null;
  const modal = document.getElementById('mitigationModal');
  modal.classList.remove('hidden');
  document.getElementById('mitigationModalTitle').textContent = mitigationId ? '감소대책 수정' : '감소대책 추가';
  const form = document.getElementById('mitigationForm');
  form.reset();

  if (mitigationId) {
    const m = (riskProject.mitigations || []).find(x => x.id === mitigationId);
    if (m) {
      document.getElementById('rmNo').value = m.mitigation_no || '';
      document.getElementById('rmHazard').value = m.hazard_summary || '';
      document.getElementById('rmRiskScore').value = m.current_risk_score || '';
      document.getElementById('rmPlan').value = m.improvement_plan || '';
      document.getElementById('rmManager').value = m.manager || '';
      document.getElementById('rmBudget').value = m.budget || '';
      document.getElementById('rmSchedule').value = m.schedule || '';
      document.getElementById('rmCompDate').value = m.completion_date ? String(m.completion_date).substring(0, 10) : '';
      document.getElementById('rmPostLikelihood').value = m.post_likelihood || '';
      document.getElementById('rmPostSeverity').value = m.post_severity || '';
      document.getElementById('rmStatus').value = m.status || 'planned';
    }
  } else {
    // 자동 번호 부여
    const existing = riskProject.mitigations || [];
    const maxNo = existing.reduce((max, m) => Math.max(max, parseInt(m.mitigation_no) || 0), 0);
    document.getElementById('rmNo').value = maxNo + 1;
  }
}
function closeMitigationModal() {
  document.getElementById('mitigationModal').classList.add('hidden');
  editingMitigationId = null;
}

async function submitMitigation(e) {
  e.preventDefault();
  const data = {
    mitigation_no: document.getElementById('rmNo').value.trim(),
    hazard_summary: document.getElementById('rmHazard').value.trim() || null,
    current_risk_score: document.getElementById('rmRiskScore').value ? parseInt(document.getElementById('rmRiskScore').value) : null,
    improvement_plan: document.getElementById('rmPlan').value.trim() || null,
    manager: document.getElementById('rmManager').value.trim() || null,
    budget: document.getElementById('rmBudget').value.trim() || null,
    schedule: document.getElementById('rmSchedule').value.trim() || null,
    completion_date: document.getElementById('rmCompDate').value || null,
    post_likelihood: document.getElementById('rmPostLikelihood').value ? parseInt(document.getElementById('rmPostLikelihood').value) : null,
    post_severity: document.getElementById('rmPostSeverity').value ? parseInt(document.getElementById('rmPostSeverity').value) : null,
    status: document.getElementById('rmStatus').value
  };
  if (!data.mitigation_no) return showToast('대책 번호를 입력하세요', 'error');

  try {
    if (editingMitigationId) {
      await api('/risk/mitigations/' + editingMitigationId, { method: 'PATCH', body: JSON.stringify(data) });
      showToast('감소대책이 수정되었습니다');
    } else {
      await api('/risk/projects/' + riskProject.id + '/mitigations', { method: 'POST', body: JSON.stringify(data) });
      showToast('감소대책이 추가되었습니다');
    }
    closeMitigationModal();
    await loadProject(riskProject.id);
  } catch (err) { showToast(err.message, 'error'); }
}

async function uploadMitigationPhoto(e, mitigationId) {
  e.preventDefault();
  const input = document.getElementById('photoInput-' + mitigationId);
  if (!input.files.length) return showToast('사진을 선택하세요', 'error');
  const formData = new FormData();
  formData.append('photo', input.files[0]);
  try {
    await api('/risk/mitigations/' + mitigationId + '/photo', {
      method: 'POST', body: formData, headers: {}
    });
    showToast('사진이 업로드되었습니다');
    await loadProject(riskProject.id);
  } catch (err) { showToast(err.message, 'error'); }
}