{% extends "base.html" %}
{% set active_page = "drafts" %}

{% block title %}Compare Drafts — IETF Draft Analyzer{% endblock %}

{% block extra_head %}
<style>
    .compare-card {
        background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(30, 41, 59, 0.4));
        backdrop-filter: blur(10px);
    }
    .idea-shared { background: rgba(34, 197, 94, 0.1); border-color: rgba(34, 197, 94, 0.2); }
    .idea-unique { background: rgba(59, 130, 246, 0.1); border-color: rgba(59, 130, 246, 0.2); }
    .ref-pill {
        display: inline-block;
        padding: 1px 8px;
        border-radius: 9999px;
        font-size: 0.65rem;
        font-weight: 500;
        background: rgba(51, 65, 85, 0.5);
        color: #94a3b8;
        border: 1px solid rgba(71, 85, 105, 0.4);
    }
    .loading-spinner {
        border: 3px solid rgba(59, 130, 246, 0.2);
        border-top-color: #3b82f6;
        border-radius: 50%;
        width: 20px;
        height: 20px;
        animation: spin 0.8s linear infinite;
        display: inline-block;
    }
    @keyframes spin { to { transform: rotate(360deg); } }
</style>
{% endblock %}

{% block content %}
<!-- Header -->
<div class="mb-6">
    <h1 class="text-2xl font-bold text-white">Compare Drafts</h1>
    <p class="text-slate-400 text-sm mt-1">Side-by-side analysis of selected drafts: shared ideas, references, and AI-generated comparison.</p>
</div>

{% if not data %}
<!-- No data yet — show instructions -->
<div class="compare-card rounded-xl border border-slate-800 p-8 text-center max-w-xl mx-auto">
    <svg class="w-12 h-12 mx-auto mb-4 text-slate-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2"/>
    </svg>
    {% if names and names|length < 2 %}
    <p class="text-slate-400 text-sm mb-4">Need at least 2 valid draft names to compare.</p>
    {% else %}
    <p class="text-slate-400 text-sm mb-4">Select drafts to compare from the <a href="/drafts" class="text-blue-400 hover:text-blue-300">Draft Explorer</a>, or enter draft names below.</p>
    {% endif %}
    <form method="get" action="/compare" class="mt-4">
        <input type="text" name="drafts" placeholder="draft-name-1, draft-name-2, ..."
            value="{{ names | join(', ') if names else '' }}"
            class="w-full bg-slate-800/60 border border-slate-700 rounded-lg px-4 py-2.5 text-sm text-slate-200 placeholder-slate-500 focus:outline-none focus:border-blue-500 mb-3">
        <button type="submit" class="px-6 py-2.5 bg-blue-600 text-white rounded-lg text-sm font-medium hover:bg-blue-500 transition-colors">
            Compare
        </button>
    </form>
</div>
{% else %}

<!-- Draft cards side by side -->
<div class="grid grid-cols-1 lg:grid-cols-{{ data.drafts|length }} gap-4 mb-6">
    {% for draft in data.drafts %}
    <div class="compare-card rounded-xl border border-slate-800 p-5">
        <a href="/drafts/{{ draft.name }}" class="text-blue-400 hover:text-blue-300 font-semibold text-sm transition">
            {{ draft.title }}
        </a>
        <div class="text-xs text-slate-600 font-mono mt-1">{{ draft.name }}</div>
        <div class="text-xs text-slate-500 mt-2 line-clamp-3">{{ (draft.abstract | striptags)[:200] }}</div>

        {% if draft.rating %}
        <!-- Rating radar -->
        <div class="mt-3 grid grid-cols-5 gap-1 text-center">
            {% for dim, label in [('novelty', 'Nov'), ('maturity', 'Mat'), ('relevance', 'Rel'), ('momentum', 'Mom'), ('overlap', 'Ovl')] %}
            <div>
                <div class="text-xs text-slate-500">{{ label }}</div>
                {% if dim == 'overlap' %}
                <div class="text-sm font-semibold {% if draft.rating[dim] <= 2 %}text-green-400{% elif draft.rating[dim] <= 3 %}text-yellow-400{% else %}text-red-400{% endif %}">
                    {{ draft.rating[dim] }}
                </div>
                {% else %}
                <div class="text-sm font-semibold {% if draft.rating[dim] >= 4 %}text-green-400{% elif draft.rating[dim] >= 3 %}text-yellow-400{% else %}text-red-400{% endif %}">
                    {{ draft.rating[dim] }}
                </div>
                {% endif %}
            </div>
            {% endfor %}
        </div>
        <div class="text-center mt-2">
            <span class="score-badge {% if draft.rating.score >= 3.5 %}score-high{% elif draft.rating.score >= 2.5 %}score-mid{% else %}score-low{% endif %}">
                {{ draft.rating.score }}
            </span>
        </div>
        {% endif %}
    </div>
    {% endfor %}
</div>

<!-- Pairwise similarities -->
{% if data.similarities %}
<div class="compare-card rounded-xl border border-slate-800 p-5 mb-6">
    <h3 class="text-sm font-semibold text-slate-300 mb-3">Pairwise Embedding Similarity</h3>
    <div class="space-y-2">
        {% for sim in data.similarities %}
        <div class="flex items-center gap-3">
            <span class="text-xs font-mono text-slate-400 w-1/3 truncate">{{ sim.a.split('-')[-1][:20] }}</span>
            <span class="text-xs text-slate-600">&harr;</span>
            <span class="text-xs font-mono text-slate-400 w-1/3 truncate">{{ sim.b.split('-')[-1][:20] }}</span>
            <div class="flex-1 h-2 bg-slate-800 rounded overflow-hidden">
                <div class="h-full rounded {% if sim.similarity >= 0.85 %}bg-green-500{% elif sim.similarity >= 0.7 %}bg-yellow-500{% else %}bg-blue-500{% endif %}"
                     style="width: {{ (sim.similarity * 100)|int }}%"></div>
            </div>
            <span class="text-xs font-mono font-semibold w-12 text-right {% if sim.similarity >= 0.85 %}text-green-400{% elif sim.similarity >= 0.7 %}text-yellow-400{% else %}text-blue-400{% endif %}">
                {{ "%.3f"|format(sim.similarity) }}
            </span>
        </div>
        {% endfor %}
    </div>
</div>
{% endif %}

<!-- Shared Ideas -->
{% if data.shared_ideas %}
<div class="compare-card rounded-xl border border-slate-800 p-5 mb-6">
    <h3 class="text-sm font-semibold text-green-400 mb-3">Shared Ideas ({{ data.shared_ideas|length }})</h3>
    <div class="space-y-2">
        {% for idea in data.shared_ideas %}
        <div class="idea-shared rounded-lg border p-3">
            <div class="text-sm text-slate-200 font-medium">{{ idea.title }}</div>
            <div class="text-xs text-slate-500 mt-1">Found in: {{ idea.drafts | join(', ') }}</div>
        </div>
        {% endfor %}
    </div>
</div>
{% endif %}

<!-- Unique Ideas per draft -->
<div class="grid grid-cols-1 lg:grid-cols-{{ data.drafts|length }} gap-4 mb-6">
    {% for draft in data.drafts %}
    <div class="compare-card rounded-xl border border-slate-800 p-5">
        <h3 class="text-sm font-semibold text-blue-400 mb-3">
            Unique Ideas: {{ draft.name.split('-')[-1][:20] }}
            <span class="text-slate-600 font-normal">({{ data.unique_ideas.get(draft.name, [])|length }})</span>
        </h3>
        <div class="space-y-2">
            {% for idea in data.unique_ideas.get(draft.name, [])[:10] %}
            <div class="idea-unique rounded-lg border p-2.5">
                <div class="text-xs text-slate-300 font-medium">{{ idea.title }}</div>
                {% if idea.description %}
                <div class="text-xs text-slate-500 mt-0.5 line-clamp-2">{{ idea.description }}</div>
                {% endif %}
            </div>
            {% endfor %}
            {% if data.unique_ideas.get(draft.name, [])|length == 0 %}
            <div class="text-xs text-slate-600 italic">No unique ideas extracted</div>
            {% endif %}
        </div>
    </div>
    {% endfor %}
</div>

<!-- Shared References -->
{% if data.shared_refs %}
<div class="compare-card rounded-xl border border-slate-800 p-5 mb-6">
    <h3 class="text-sm font-semibold text-slate-300 mb-3">Shared References ({{ data.shared_refs|length }})</h3>
    <div class="flex flex-wrap gap-1.5">
        {% for ref in data.shared_refs %}
        <span class="ref-pill">{{ ref.type|upper }} {{ ref.id }}</span>
        {% endfor %}
    </div>
</div>
{% endif %}

<!-- Claude Comparison (lazy-loaded) -->
<div class="compare-card rounded-xl border border-slate-800 p-5 mb-6" id="comparisonSection">
    <div class="flex items-center justify-between mb-3">
        <h3 class="text-sm font-semibold text-slate-300">AI Comparison Summary</h3>
        <button onclick="runComparison()" id="compareBtn"
            class="px-4 py-1.5 bg-blue-600 text-white rounded-lg text-xs font-medium hover:bg-blue-500 transition-colors">
            Generate Comparison
        </button>
    </div>
    <div id="comparisonResult" class="text-sm text-slate-400">
        Click "Generate Comparison" to get a Claude-powered analysis of these drafts.
    </div>
</div>

{% endif %}
{% endblock %}

{% block extra_scripts %}
{% if data %}
<script>
async function runComparison() {
    const btn = document.getElementById('compareBtn');
    const result = document.getElementById('comparisonResult');
    btn.disabled = true;
    btn.innerHTML = '<span class="loading-spinner"></span> Analyzing...';
    result.innerHTML = '<div class="flex items-center gap-2"><span class="loading-spinner"></span> <span class="text-slate-500">Generating comparison...</span></div>';

    try {
        const resp = await fetch('/api/compare', {
            method: 'POST',
            headers: {'Content-Type': 'application/json'},
            body: JSON.stringify({drafts: {{ data.drafts | map(attribute='name') | list | tojson }}})
        });
        const data = await resp.json();
        if (data.error) {
            result.innerHTML = '<div class="text-red-400">Error: ' + escapeHtml(data.error) + '</div>';
        } else {
            result.innerHTML = '<div class="text-slate-300 whitespace-pre-line leading-relaxed">' + escapeHtml(data.text) + '</div>';
        }
    } catch (e) {
        result.innerHTML = '<div class="text-red-400">Error: ' + escapeHtml(e.message) + '</div>';
    }
    btn.disabled = false;
    btn.textContent = 'Regenerate';
}
</script>
{% endif %}
{% endblock %}