{% extends "base.html" %}
{% block title %}Live Reasoning — CogniGraph Studio{% endblock %}
{% block nav_reasoning %}active{% endblock %}

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

{% block content %}
<div class="page-header">
    <h1>Live Reasoning</h1>
    <p class="subtitle">Watch your graph think in real-time</p>
</div>

<div class="reasoning-input" x-data="reasoningUI()">
    <div class="query-bar">
        <input type="text" class="query-input" placeholder="Ask your knowledge graph..."
               x-model="query" @keydown.enter="startReasoning()">
        <button class="btn primary" @click="startReasoning()" :disabled="running">
            <span x-text="running ? 'Reasoning...' : 'Ask'"></span>
        </button>
    </div>

    <div class="reasoning-layout">
        <div id="reasoning-graph" class="reasoning-canvas"></div>
        <div class="reasoning-feed">
            <div class="feed-header">
                <span x-text="status"></span>
                <span class="confidence-badge" x-show="confidence > 0"
                      x-text="Math.round(confidence * 100) + '%'"></span>
            </div>
            <div id="activity-feed" class="activity-feed">
                <template x-for="item in feed" :key="item.id">
                    <div class="feed-item" :class="item.type">
                        <span class="feed-type" x-text="item.type"></span>
                        <span class="feed-content" x-text="item.content"></span>
                    </div>
                </template>
            </div>
            <div class="result-panel" x-show="answer">
                <h3>Answer</h3>
                <div class="answer-text" x-html="answer"></div>
                <div class="result-meta" x-show="resultMeta">
                    <span x-text="'Rounds: ' + (resultMeta?.rounds || '-')"></span> &middot;
                    <span x-text="'Nodes: ' + (resultMeta?.node_count || '-')"></span> &middot;
                    <span x-text="'Cost: $' + (resultMeta?.cost_usd?.toFixed(4) || '-')"></span> &middot;
                    <span x-text="'Latency: ' + Math.round(resultMeta?.latency_ms || 0) + 'ms'"></span>
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock %}

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

    // Load graph for visualization backdrop
    fetch('/studio/api/graph/visualization')
        .then(r => r.json())
        .then(data => {
            if (data.nodes && data.nodes.length > 0) {
                reasoningGraph = new CogniGraphViz('#reasoning-graph', data, { mini: false, reasoning: true });
            }
        });

    function reasoningUI() {
        return {
            query: '',
            running: false,
            status: 'Ready',
            confidence: 0,
            answer: '',
            resultMeta: null,
            feed: [],
            feedId: 0,

            async startReasoning() {
                if (!this.query.trim() || this.running) return;
                this.running = true;
                this.status = 'Activating nodes...';
                this.answer = '';
                this.resultMeta = null;
                this.feed = [];
                this.confidence = 0;

                try {
                    const response = await fetch('/studio/api/reason', {
                        method: 'POST',
                        headers: { 'Content-Type': 'application/json' },
                        body: JSON.stringify({ query: this.query, max_rounds: 5 })
                    });

                    const reader = response.body.getReader();
                    const decoder = new TextDecoder();
                    let buffer = '';

                    while (true) {
                        const { done, value } = await reader.read();
                        if (done) break;

                        buffer += decoder.decode(value, { stream: true });
                        const lines = buffer.split('\n');
                        buffer = lines.pop() || '';

                        for (const line of lines) {
                            if (!line.startsWith('data: ')) continue;
                            const payload = line.slice(6).trim();
                            if (payload === '[DONE]') continue;

                            try {
                                const event = JSON.parse(payload);
                                this.handleEvent(event);
                            } catch (e) {}
                        }
                    }
                } catch (e) {
                    this.status = 'Error: ' + e.message;
                }

                this.running = false;
            },

            handleEvent(event) {
                if (event.type === 'final_answer') {
                    this.answer = event.answer;
                    this.confidence = event.confidence;
                    this.resultMeta = event;
                    this.status = 'Complete';

                    // Highlight active nodes
                    if (reasoningGraph && event.active_nodes) {
                        reasoningGraph.highlightNodes(event.active_nodes);
                    }
                } else if (event.type === 'error') {
                    this.status = 'Error: ' + event.message;
                    this.feed.push({
                        id: this.feedId++,
                        type: 'error',
                        content: event.message
                    });
                }
            }
        }
    }
</script>
{% endblock %}