{% extends "base.html" %}
{% block title %}Graph Explorer — CogniGraph Studio{% endblock %}
{% block nav_graph %}active{% endblock %}

{% block head %}
<script src="/studio/static/vendor/d3.min.js"></script>
{% endblock %}

{% block content %}
<div class="page-header">
    <h1>Graph Explorer</h1>
    <p class="subtitle">Interactive knowledge graph visualization</p>
</div>

<div class="graph-toolbar" x-data="graphFilters()">
    <input type="text" class="search-input" placeholder="Search nodes..."
           x-model="searchQuery" @input.debounce.300ms="filterGraph()">
    <div class="filter-chips">
        <template x-for="t in types" :key="t">
            <button class="chip" :class="{ active: activeTypes.includes(t) }"
                    @click="toggleType(t)" x-text="t"></button>
        </template>
    </div>
    <div class="graph-controls">
        <button onclick="zoomIn()" title="Zoom In">+</button>
        <button onclick="zoomOut()" title="Zoom Out">&minus;</button>
        <button onclick="zoomFit()" title="Fit">&#8689;</button>
        <button onclick="zoomReset()" title="Reset">&#8634;</button>
    </div>
</div>

<div class="graph-layout">
    <div id="graph-container" class="graph-canvas"></div>
    <div id="node-detail-panel" class="detail-panel">
        <div class="detail-placeholder">Click a node to see details</div>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script src="/studio/static/js/graph-viz.js"></script>
<script>
    let graphInstance = null;

    fetch('/studio/api/graph/visualization')
        .then(r => r.json())
        .then(data => {
            if (data.nodes && data.nodes.length > 0) {
                graphInstance = initGraphViz('#graph-container', data, {
                    mini: false,
                    onNodeClick: function(nodeId) {
                        htmx.ajax('GET', '/studio/api/partials/node-detail/' + nodeId,
                                  { target: '#node-detail-panel', swap: 'innerHTML' });
                    }
                });
            }
        });

    function graphFilters() {
        return {
            searchQuery: '',
            types: {{ node_types.keys()|list|tojson }},
            activeTypes: [],
            toggleType(t) {
                const idx = this.activeTypes.indexOf(t);
                if (idx >= 0) this.activeTypes.splice(idx, 1);
                else this.activeTypes.push(t);
                this.filterGraph();
            },
            filterGraph() {
                if (graphInstance && graphInstance.filter) {
                    graphInstance.filter(this.searchQuery, this.activeTypes);
                }
            }
        }
    }

    function zoomIn() { graphInstance && graphInstance.zoomIn && graphInstance.zoomIn(); }
    function zoomOut() { graphInstance && graphInstance.zoomOut && graphInstance.zoomOut(); }
    function zoomFit() { graphInstance && graphInstance.zoomFit && graphInstance.zoomFit(); }
    function zoomReset() { graphInstance && graphInstance.zoomReset && graphInstance.zoomReset(); }
</script>
{% endblock %}