// ============================================================
// MODULE 3: DEVELOPMENTAL MILESTONES → NARRATIVE
// COMPLETELY SEPARATE FROM HPI MODULES 1 & 2
// Uses AI to convert checked milestones into sentences
// ============================================================
(function() {
  var ageSelect = document.getElementById('ms-age-group');
  var checklist = document.getElementById('milestone-checklist');
  var actionsBar = document.getElementById('milestone-actions');
  var allYesBtn = document.getElementById('ms-all-yes');
  var allClearBtn = document.getElementById('ms-all-clear');
  var generateBtn = document.getElementById('ms-generate-btn');
  var outputCard = document.getElementById('ms-output');
  var summaryBar = document.getElementById('ms-summary-bar');
  var narrativeText = document.getElementById('ms-narrative-text');
  var modelUsed = document.getElementById('ms-model-used');

  // State: { "domain-0": { domain, milestone, status: null|'yes'|'no' } }
  var state = {};

  // When age group changes, rebuild checklist
  ageSelect.addEventListener('change', function() {
    var age = ageSelect.value;
    state = {};
    outputCard.classList.add('hidden');

    if (!age || !MILESTONES_DATA[age]) {
      checklist.innerHTML = '<p style="text-align:center;color:#9ca3af;padding:40px;">Select an age group to load milestones.</p>';
      actionsBar.style.display = 'none';
      return;
    }

    renderChecklist(MILESTONES_DATA[age]);
    actionsBar.style.display = 'flex';
  });

  function renderChecklist(data) {
    checklist.innerHTML = '';

    Object.keys(data).forEach(function(domain) {
      var items = data[domain];
      var config = DOMAIN_CONFIG[domain] || { icon: '📋', css: '' };

      var section = document.createElement('div');
      section.className = 'domain-section ' + config.css;

      var itemsHtml = '';
      items.forEach(function(milestone, idx) {
        var id = domain + '-' + idx;
        state[id] = { domain: domain, milestone: milestone, status: null };

        itemsHtml += '<div class="ms-item" id="item-' + safeId(id) + '">' +
          '<div class="ms-toggle">' +
            '<button class="toggle-btn" data-id="' + id + '" data-action="yes" title="Yes">✓</button>' +
            '<button class="toggle-btn" data-id="' + id + '" data-action="no" title="No">✗</button>' +
          '</div>' +
          '<span class="ms-text">' + milestone + '</span>' +
        '</div>';
      });

      section.innerHTML =
        '<div class="domain-header">' +
          '<span>' + config.icon + '</span>' +
          '<span>' + domain + '</span>' +
          '<span class="badge" id="badge-' + safeId(domain) + '">' + items.length + ' items</span>' +
        '</div>' +
        '<div class="ms-items">' + itemsHtml + '</div>';

      checklist.appendChild(section);
    });

    // Attach click handlers
    checklist.querySelectorAll('.toggle-btn').forEach(function(btn) {
      btn.addEventListener('click', function() {
        handleToggle(btn.getAttribute('data-id'), btn.getAttribute('data-action'));
      });
    });
  }

  function safeId(str) {
    return str.replace(/[^a-zA-Z0-9]/g, '_');
  }

  function handleToggle(id, action) {
    var sid = safeId(id);
    var item = document.getElementById('item-' + sid);
    var yesBtn = item.querySelector('[data-action="yes"]');
    var noBtn = item.querySelector('[data-action="no"]');
    var current = state[id].status;

    if (action === 'yes') {
      if (current === 'yes') {
        // Deselect
        state[id].status = null;
        yesBtn.classList.remove('yes-on');
        item.classList.remove('is-yes', 'is-no');
      } else {
        state[id].status = 'yes';
        yesBtn.classList.add('yes-on');
        noBtn.classList.remove('no-on');
        item.classList.add('is-yes');
        item.classList.remove('is-no');
      }
    } else {
      if (current === 'no') {
        state[id].status = null;
        noBtn.classList.remove('no-on');
        item.classList.remove('is-yes', 'is-no');
      } else {
        state[id].status = 'no';
        noBtn.classList.add('no-on');
        yesBtn.classList.remove('yes-on');
        item.classList.remove('is-yes');
        item.classList.add('is-no');
      }
    }

    updateBadges();
  }

  function updateBadges() {
    var counts = {};
    Object.keys(state).forEach(function(id) {
      var d = state[id].domain;
      if (!counts[d]) counts[d] = { total: 0, yes: 0, no: 0 };
      counts[d].total++;
      if (state[id].status === 'yes') counts[d].yes++;
      if (state[id].status === 'no') counts[d].no++;
    });

    Object.keys(counts).forEach(function(domain) {
      var badge = document.getElementById('badge-' + safeId(domain));
      if (badge) {
        var c = counts[domain];
        var assessed = c.yes + c.no;
        badge.textContent = assessed > 0
          ? c.yes + '✓ ' + c.no + '✗ / ' + c.total
          : c.total + ' items';
      }
    });
  }

  // All Yes
  allYesBtn.addEventListener('click', function() {
    Object.keys(state).forEach(function(id) {
      state[id].status = 'yes';
      var sid = safeId(id);
      var item = document.getElementById('item-' + sid);
      if (item) {
        item.querySelector('[data-action="yes"]').classList.add('yes-on');
        item.querySelector('[data-action="no"]').classList.remove('no-on');
        item.classList.add('is-yes');
        item.classList.remove('is-no');
      }
    });
    updateBadges();
    showToast('All marked as achieved', 'success');
  });

  // Clear All
  allClearBtn.addEventListener('click', function() {
    Object.keys(state).forEach(function(id) {
      state[id].status = null;
      var sid = safeId(id);
      var item = document.getElementById('item-' + sid);
      if (item) {
        item.querySelector('[data-action="yes"]').classList.remove('yes-on');
        item.querySelector('[data-action="no"]').classList.remove('no-on');
        item.classList.remove('is-yes', 'is-no');
      }
    });
    updateBadges();
    outputCard.classList.add('hidden');
    showToast('All cleared', 'info');
  });

  // GENERATE NARRATIVE
  // Sends ONLY assessed milestones to AI
  // AI converts them into professional narrative sentences
  generateBtn.addEventListener('click', function() {
    var ageGroup = ageSelect.value;
    if (!ageGroup) {
      showToast('Select an age group first', 'error');
      return;
    }

    // Collect all milestone data (AI will only use yes/no, ignore null)
    var allMilestones = Object.keys(state).map(function(id) {
      return state[id];
    });

    var assessed = allMilestones.filter(function(m) { return m.status !== null; });
    if (assessed.length === 0) {
      showToast('Please assess at least one milestone', 'error');
      return;
    }

    showLoading('AI is generating developmental narrative...');

    fetch('/api/generate-milestone-narrative', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        milestones: allMilestones,
        ageGroup: ageGroup,
        patientAge: document.getElementById('ms-patient-age').value,
        patientGender: document.getElementById('ms-patient-gender').value,
        model: getSelectedModel()
      })
    })
    .then(function(r) { return r.json(); })
    .then(function(data) {
      hideLoading();
      if (data.success) {
        narrativeText.textContent = data.narrative;
        modelUsed.textContent = (data.model || '').split('/').pop();

        // Summary bar
        if (data.summary) {
          summaryBar.innerHTML =
            '<div class="stat"><span class="dot dot-green"></span> Achieved: ' + data.summary.achieved + '</div>' +
            '<div class="stat"><span class="dot dot-red"></span> Not Yet: ' + data.summary.notAchieved + '</div>' +
            '<div class="stat"><span class="dot dot-gray"></span> Not Assessed: ' + data.summary.notAssessed + ' (omitted)</div>';
          summaryBar.classList.remove('hidden');
        }

        outputCard.classList.remove('hidden');
        outputCard.scrollIntoView({ behavior: 'smooth' });
        showToast('Developmental narrative generated!', 'success');
      } else {
        showToast(data.error || 'Failed', 'error');
      }
    })
    .catch(function(err) {
      hideLoading();
      showToast('Error: ' + err.message, 'error');
    });
  });

  console.log('✅ Milestones module loaded (separate from HPI)');
    // ============================================================
  // 3-SENTENCE SUMMARY GENERATOR
  // Takes the full narrative and condenses it
  // ============================================================
  var quickSummaryBtn = document.getElementById('ms-quick-summary-btn');
  var quickSummaryDiv = document.getElementById('ms-quick-summary');
  var summaryText = document.getElementById('ms-summary-text');
  var summaryModelUsed = document.getElementById('ms-summary-model-used');

  quickSummaryBtn.addEventListener('click', function() {
    var fullNarrative = narrativeText.innerText.trim();

    if (!fullNarrative) {
      showToast('Generate the full narrative first', 'error');
      return;
    }

    // Disable button and show loading state
    quickSummaryBtn.disabled = true;
    quickSummaryBtn.classList.add('loading');
    var originalHTML = quickSummaryBtn.innerHTML;
    quickSummaryBtn.innerHTML = '<i class="fas fa-spinner fa-spin"></i> Summarizing...';

    fetch('/api/generate-milestone-summary', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        narrative: fullNarrative,
        ageGroup: ageSelect.value,
        patientAge: document.getElementById('ms-patient-age').value,
        patientGender: document.getElementById('ms-patient-gender').value,
        model: getSelectedModel()
      })
    })
    .then(function(r) { return r.json(); })
    .then(function(data) {
      quickSummaryBtn.disabled = false;
      quickSummaryBtn.classList.remove('loading');
      quickSummaryBtn.innerHTML = '<i class="fas fa-compress-alt"></i> Regenerate Summary';

      if (data.success) {
        summaryText.textContent = data.summary;
        summaryModelUsed.textContent = (data.model || '').split('/').pop();
        quickSummaryDiv.classList.remove('hidden');
        quickSummaryDiv.scrollIntoView({ behavior: 'smooth' });
        showToast('3-sentence summary generated!', 'success');
      } else {
        quickSummaryBtn.innerHTML = originalHTML;
        showToast(data.error || 'Summary failed', 'error');
      }
    })
    .catch(function(err) {
      quickSummaryBtn.disabled = false;
      quickSummaryBtn.classList.remove('loading');
      quickSummaryBtn.innerHTML = originalHTML;
      showToast('Error: ' + err.message, 'error');
    });
  });

  console.log('✅ 3-sentence summary feature loaded');
})();