{% extends "base.html" %}
{% block title %}New Inspection{% endblock %}
{% block content %}
<div class="row justify-content-center">
  <div class="col-lg-6">
    <div class="card shadow-sm">
      <div class="card-header bg-primary text-white">
        <h5 class="mb-0"><i class="bi bi-play-circle"></i> New Inspection</h5>
      </div>
      <div class="card-body">
        <form method="post">
          {{ form.hidden_tag() }}

          <div class="mb-3">
            {{ form.template_id.label(class="form-label fw-semibold") }}
            {{ form.template_id(class="form-select" + (" is-invalid" if form.template_id.errors else ""), id="templateSelect") }}
            {% for e in form.template_id.errors %}<div class="invalid-feedback">{{ e }}</div>{% endfor %}
            {# phase52 — the list shows shared forms plus the ones attached to
               the selected contract, refreshed by JS when the contract changes. #}
            <div class="form-text">Shows forms available on the selected contract.</div>
            <div id="templateEmpty" class="form-text text-danger d-none">
              No forms are available on this contract yet.
            </div>
          </div>

          <div class="mb-3">
            {{ form.project_id.label(class="form-label fw-semibold") }}
            {{ form.project_id(class="form-select" + (" is-invalid" if form.project_id.errors else ""), id="projectSelect") }}
            {% for e in form.project_id.errors %}<div class="invalid-feedback">{{ e }}</div>{% endfor %}
          </div>

          <div class="mb-3">
            {{ form.facility_id.label(class="form-label fw-semibold") }}
            {{ form.facility_id(class="form-select" + (" is-invalid" if form.facility_id.errors else ""), id="facilitySelect") }}
            {% for e in form.facility_id.errors %}<div class="invalid-feedback">{{ e }}</div>{% endfor %}
            <div id="facilitySpinner" class="form-text text-muted d-none">
              <span class="spinner-border spinner-border-sm" role="status"></span> Loading facilities…
            </div>
            <div id="facilityEmpty" class="form-text text-warning d-none">
              No active facilities found for this contract.
            </div>
          </div>

          <div class="mb-3" id="areaGroup" style="display:none;">
            {{ form.area_id.label(class="form-label fw-semibold") }}
            {{ form.area_id(class="form-select", id="areaSelect") }}
          </div>

          <div class="d-grid">
            <button type="submit" class="btn btn-primary btn-lg">
              <i class="bi bi-play-fill"></i> Begin Inspection
            </button>
          </div>
        </form>
      </div>
    </div>
  </div>
</div>

<script>
(function () {
  const projectSel  = document.getElementById('projectSelect');
  const templateSel = document.getElementById('templateSelect');
  const templateEmpty = document.getElementById('templateEmpty');
  const facilitySel = document.getElementById('facilitySelect');
  const spinner     = document.getElementById('facilitySpinner');
  const emptyMsg    = document.getElementById('facilityEmpty');
  const areaGroup   = document.getElementById('areaGroup');
  const areaSel     = document.getElementById('areaSelect');

  const FACILITIES_URL = `{{ url_for('inspections.facilities_for_project', project_id=0) }}`.replace('/0', '/');
  const TEMPLATES_URL  = `{{ url_for('inspections.templates_for_project', project_id=0) }}`.replace('/0', '/');
  const AREAS_URL      = `{{ url_for('inspections.areas_for_facility', facility_id=0) }}`.replace('/0', '/');

  function loadAreas(facilityId, selectedAreaId) {
    if (!facilityId) {
      areaGroup.style.display = 'none';
      areaSel.innerHTML = '<option value="0">— No specific area —</option>';
      return;
    }
    fetch(AREAS_URL + facilityId)
      .then(r => r.json())
      .then(data => {
        if (data.length === 0) {
          areaGroup.style.display = 'none';
          areaSel.innerHTML = '<option value="0">— No specific area —</option>';
        } else {
          areaSel.innerHTML = '<option value="0">— No specific area —</option>';
          data.forEach(a => {
            const opt = document.createElement('option');
            opt.value = a.id;
            opt.textContent = a.name;
            if (selectedAreaId && a.id === selectedAreaId) opt.selected = true;
            areaSel.appendChild(opt);
          });
          areaGroup.style.display = '';
        }
      })
      .catch(() => {
        areaGroup.style.display = 'none';
      });
  }

  // Forms are per-contract (phase52): a customer's bespoke form must not be
  // offered on another customer's facilities. Keeps the currently selected
  // form if it is still valid on the new contract.
  function loadTemplates(projectId) {
    if (!projectId || !templateSel) return;
    const keep = templateSel.value;
    fetch(TEMPLATES_URL + projectId)
      .then(r => r.json())
      .then(data => {
        templateSel.innerHTML = '';
        data.forEach(t => {
          const opt = document.createElement('option');
          opt.value = t.id;
          opt.textContent = t.name;
          if (String(t.id) === keep) opt.selected = true;
          templateSel.appendChild(opt);
        });
        templateEmpty.classList.toggle('d-none', data.length > 0);
      })
      .catch(() => {});   // leave the server-rendered list in place
  }

  function loadFacilities(projectId, selectedFacilityId, selectedAreaId) {
    if (!projectId) return;
    spinner.classList.remove('d-none');
    emptyMsg.classList.add('d-none');
    facilitySel.disabled = true;
    areaGroup.style.display = 'none';

    fetch(FACILITIES_URL + projectId)
      .then(r => r.json())
      .then(data => {
        facilitySel.innerHTML = '';
        if (data.length === 0) {
          emptyMsg.classList.remove('d-none');
          facilitySel.innerHTML = '<option value="">— no facilities —</option>';
        } else {
          data.forEach(f => {
            const opt = document.createElement('option');
            opt.value = f.id;
            opt.textContent = f.name;
            if (selectedFacilityId && f.id === selectedFacilityId) opt.selected = true;
            facilitySel.appendChild(opt);
          });
          loadAreas(facilitySel.value, selectedAreaId);
        }
      })
      .catch(() => {
        facilitySel.innerHTML = '<option value="">— error loading facilities —</option>';
      })
      .finally(() => {
        spinner.classList.add('d-none');
        facilitySel.disabled = false;
      });
  }

  projectSel.addEventListener('change', function () {
    loadFacilities(this.value, null, null);
    loadTemplates(this.value);
  });

  facilitySel.addEventListener('change', function () {
    loadAreas(this.value, null);
  });

  // On page load: if project already selected (e.g. validation error or reinspect),
  // reload facility list preserving the currently selected facility and area values.
  const initProject  = projectSel.value;
  const initFacility = facilitySel.value ? parseInt(facilitySel.value, 10) : null;
  const initArea     = areaSel.value ? parseInt(areaSel.value, 10) : null;
  if (initProject) {
    const hasRealOptions = Array.from(facilitySel.options).some(o => parseInt(o.value, 10) > 0);
    if (!hasRealOptions) {
      loadFacilities(initProject, initFacility, initArea);
    } else {
      // Facilities already rendered server-side — just load areas for the selected facility
      if (initFacility) loadAreas(initFacility, initArea);
    }
  }
})();
</script>
{% endblock %}