{% extends "base.html" %}
{% load static %}
{% load i18n %}

{% block head %}
    
    <!-- Mapbox GL Draw 1.5.0 (local) -->
    <link rel="stylesheet" href="{% static 'common/mapbox-gl-draw.css' %}" />

    <link href="https://cdn.maptiler.com/maptiler-geocoding-control/v2.1.4/style.css" rel="stylesheet">
    
{% endblock head%}

{% block content %}
<div class="container d-flex justify-content-center mt-5">
  <div class="w-100" style="max-width: 700px;">
    <h2 class="mb-4 text-center" style="color: var(--brand-color);">
      {% if mode == "update" %}{% translate "Modifier le projet" %}{% else %}{% translate "Créer un nouveau projet" %}{% endif %}
    </h2>

    <form method="post">
      {% csrf_token %}
      
      {% for field in form %}
        <div class="mb-3">
          {{ field.label_tag }}
          {{ field }}
          {% if field.errors %}
            <div class="text-danger">
              {{ field.errors }}
            </div>
          {% endif %}
        </div>
      {% endfor %}

      <div id="map" style="height: 400px;" class="mb-3"></div>
      <input type="hidden" name="geom_geojson" id="id_geom_geojson" value="{{ form.geom.value|default:'' }}">

      <button type="submit" class="btn btn-primary">
        {% if mode == "update" %}{% translate "Enregistrer les modifications" %}{% else %}{% translate "Créer le projet" %}{% endif %}
      </button>
    </form>

    <div class="mt-3">
      <small class="text-muted">
        {% blocktranslate %}
        Les champs avec une <span style="border-bottom: 1px dashed #6c757d;">bordure en pointillés</span> sont facultatifs.
        {% endblocktranslate %}
      </small>
    </div>
  </div>
</div>
{% endblock content%}

{% block script %}

<!-- Mapbox GL Draw 1.5.0 (local) -->
<script src="{% static 'common/mapbox-gl-draw.js' %}"></script>
<script src="https://cdn.maptiler.com/maptiler-geocoding-control/v2.1.4/maplibregl.umd.js"></script>

<script src="{% static 'common/turf.min.js' %}"></script>

<script>
    $(document).ready(function() {
        function initCustomMultipleSelect(fieldId, placeholder, allSelectedMsg) {
            const originalSelect = document.getElementById(fieldId);
            if (!originalSelect) return;

            // Copy original styles BEFORE hiding the element
            const originalStyle = originalSelect.getAttribute('style') || '';

            // Hide original select
            originalSelect.style.display = 'none';

            // Create wrapper container
            const wrapper = document.createElement('div');
            wrapper.className = 'custom-multiselect-wrapper';
            originalSelect.parentNode.insertBefore(wrapper, originalSelect.nextSibling);

            // Create container for selected items (badges)
            const badgesContainer = document.createElement('div');
            badgesContainer.className = 'd-flex flex-wrap gap-2 mb-2';
            wrapper.appendChild(badgesContainer);

            // Create the select dropdown for adding items
            const adderSelect = document.createElement('select');
            adderSelect.className = 'form-select';
            
            // Copy original styles but strip out any display property
            if (originalStyle) {
                const cleanStyle = originalStyle.replace(/display\s*:\s*[^;]+;?/gi, '');
                adderSelect.setAttribute('style', cleanStyle);
            }
            wrapper.appendChild(adderSelect);

            // Function to rebuild options in the adder dropdown and the badge list
            function updateWidget() {
                badgesContainer.innerHTML = '';
                adderSelect.innerHTML = '';

                // Add placeholder option
                const placeholderOpt = document.createElement('option');
                placeholderOpt.value = '';
                placeholderOpt.textContent = placeholder;
                placeholderOpt.selected = true;
                placeholderOpt.disabled = true;
                adderSelect.appendChild(placeholderOpt);

                let hasAvailableOptions = false;

                Array.from(originalSelect.options).forEach(option => {
                    if (option.selected) {
                        // Create badge for selected item
                        const badge = document.createElement('span');
                        badge.className = 'badge bg-secondary d-inline-flex align-items-center gap-1 py-1.5 px-2.5';
                        badge.style.fontSize = '0.9em';
                        badge.style.fontWeight = 'normal';
                        badge.style.cursor = 'default';
                        
                        badge.textContent = option.textContent;

                        const removeBtn = document.createElement('button');
                        removeBtn.type = 'button';
                        removeBtn.className = 'btn-close btn-close-white ms-1';
                        removeBtn.style.fontSize = '0.55em';
                        removeBtn.style.padding = '0';
                        removeBtn.ariaLabel = 'Remove';
                        
                        removeBtn.addEventListener('click', () => {
                            option.selected = false;
                            // Trigger change event on original select for any listener
                            originalSelect.dispatchEvent(new Event('change', { bubbles: true }));
                            updateWidget();
                        });

                        badge.appendChild(removeBtn);
                        badgesContainer.appendChild(badge);
                    } else {
                        // Add to adder dropdown
                        const opt = document.createElement('option');
                        opt.value = option.value;
                        opt.textContent = option.textContent;
                        adderSelect.appendChild(opt);
                        hasAvailableOptions = true;
                    }
                });

                // Hide or disable select dropdown if no options left
                if (!hasAvailableOptions) {
                    const noOpt = document.createElement('option');
                    noOpt.value = '';
                    noOpt.textContent = allSelectedMsg;
                    noOpt.disabled = true;
                    adderSelect.appendChild(noOpt);
                }
            }

            // Handle selection from dropdown
            adderSelect.addEventListener('change', (e) => {
                const val = e.target.value;
                if (!val) return;

                const optionToSelect = Array.from(originalSelect.options).find(opt => opt.value === val);
                if (optionToSelect) {
                    optionToSelect.selected = true;
                    // Trigger change event on original select
                    originalSelect.dispatchEvent(new Event('change', { bubbles: true }));
                    updateWidget();
                }
            });

            // Initial load
            updateWidget();
        }

        initCustomMultipleSelect('id_tags', "{% translate 'Ajouter un tag...' %}", "{% translate 'Tous les tags sont sélectionnés' %}");
        initCustomMultipleSelect('id_thematics', "{% translate 'Ajouter une thématique...' %}", "{% translate 'Toutes les thématiques sont sélectionnées' %}");
    });
</script>

<script>
    let map, draw;

    function updateArea(e) {
        if (!draw) return;
        const data = draw.getAll();
        const geom = JSON.stringify(data);
        document.getElementById('id_geom_geojson').value = geom;
    }

    try {
        map = new maplibregl.Map({
            container: 'map', // ID de l'élément HTML
            style: window.MAP_STYLE_LIGHT, // Style Maplibre
            center: [4.3517, 50.8503], // Coordonnées par défaut (Bruxelles)
            zoom: 11
        });
        MapboxDraw.constants.classes.CANVAS  = 'maplibregl-canvas';
        MapboxDraw.constants.classes.CONTROL_BASE  = 'maplibregl-ctrl';
        MapboxDraw.constants.classes.CONTROL_PREFIX = 'maplibregl-ctrl-';
        MapboxDraw.constants.classes.CONTROL_GROUP = 'maplibregl-ctrl-group';
        MapboxDraw.constants.classes.ATTRIBUTION = 'maplibregl-ctrl-attrib';
        draw = new MapboxDraw({
            displayControlsDefault: false,
            controls: {
                polygon: true,
                trash: true
            }
        });
        map.addControl(draw);
        map.on('draw.create', updateArea);
        map.on('draw.delete', updateArea);
        map.on('draw.update', updateArea);

        const maptilerApiKey = (function(styleUrl) { if (!styleUrl) return ''; try { const url = new URL(styleUrl); return url.searchParams.get('key') || ''; } catch(e) { return ''; } })(window.MAP_STYLE_LIGHT);
        if (maptilerApiKey) {
            const gc = new maplibreglMaptilerGeocoder.GeocodingControl({ 
                apiKey: maptilerApiKey,
                country: ["BE"] 
            });
            map.addControl(gc, "top-left");
        }

        map.on('load', () => {
          {% if geom_geojson %}
            const existingGeom = {{ geom_geojson|safe }};
            const feature = {
                type: "Feature",
                geometry: existingGeom,
                properties: {}
            };
            draw.add(feature);

            const bbox = turf.bbox(feature);
            map.fitBounds(bbox, { padding: 20 });
            
            updateArea();
          {% endif %}
        });
    } catch (e) {
        console.error("Map initialization failed safely:", e);
    }
</script>

{% endblock script %}