{% extends "layout.html" %}

{% block content %}
<div class="d-flex justify-content-between align-items-center mb-4">
    <h2>Character Gallery</h2>
    <div class="d-flex">
        <button id="batch-generate-btn" class="btn btn-outline-success me-2">Generate Missing Covers</button>
        <button id="regenerate-all-btn" class="btn btn-outline-danger me-2">Regenerate All Covers</button>
        <form action="{{ url_for('rescan') }}" method="post">
            <button type="submit" class="btn btn-outline-primary">Rescan Character Files</button>
        </form>
    </div>
</div>

<!-- Batch Progress Bar -->
<div id="batch-progress-container" class="card mb-4 d-none">
    <div class="card-body">
        <h5 id="batch-status-text">Batch Generating...</h5>
        <div class="progress mt-2" role="progressbar" aria-label="Batch Progress" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100">
            <div id="batch-progress-bar" class="progress-bar progress-bar-striped progress-bar-animated bg-success" style="width: 0%">0%</div>
        </div>
        <p id="current-char-name" class="small text-muted mt-2 mb-0"></p>
    </div>
</div>

<div class="row row-cols-1 row-cols-sm-2 row-cols-md-3 row-cols-lg-4 g-4">
    {% for char in characters %}
    <div class="col" id="card-{{ char.slug }}">
        <div class="card h-100 character-card" onclick="window.location.href='/character/{{ char.slug }}'">
            <div class="img-container">
                {% if char.image_path %}
                <img id="img-{{ char.slug }}" src="{{ url_for('static', filename='uploads/' + char.image_path) }}" alt="{{ char.name }}">
                <span id="no-img-{{ char.slug }}" class="text-muted d-none">No Image</span>
                {% else %}
                <img id="img-{{ char.slug }}" src="" alt="{{ char.name }}" class="d-none">
                <span id="no-img-{{ char.slug }}" class="text-muted">No Image</span>
                {% endif %}
            </div>
            <div class="card-body">
                <h5 class="card-title text-center">{{ char.name }}</h5>
                <p class="card-text small text-center text-muted">{{ char.data.tags | join(', ') }}</p>
            </div>
            {% if char.data.lora.lora_name %}
            {% set lora_name = char.data.lora.lora_name.split('/')[-1].replace('.safetensors', '') %}
            <div class="card-footer text-center p-1">
                <small class="text-muted" title="{{ char.data.lora.lora_name }}">{{ lora_name }}</small>
            </div>
            {% endif %}
        </div>
    </div>
    {% endfor %}
</div>
{% endblock %}

{% block scripts %}
<script>
    document.addEventListener('DOMContentLoaded', () => {
        const batchBtn = document.getElementById('batch-generate-btn');
        const regenAllBtn = document.getElementById('regenerate-all-btn');
        const progressBar = document.getElementById('batch-progress-bar');
        const container = document.getElementById('batch-progress-container');
        const statusText = document.getElementById('batch-status-text');
        const charNameText = document.getElementById('current-char-name');
        
        const clientId = 'gallery_batch_' + Math.random().toString(36).substring(2, 15);
        const socket = new WebSocket(`ws://127.0.0.1:8188/ws?clientId=${clientId}`);
        
        let currentPromptId = null;
        let resolveGeneration = null;

        socket.addEventListener('message', (event) => {
            const msg = JSON.parse(event.data);
            if (msg.type === 'executing') {
                if (msg.data.node === null && msg.data.prompt_id === currentPromptId) {
                    if (resolveGeneration) resolveGeneration();
                }
            }
        });

        async function waitForCompletion(promptId) {
            return new Promise((resolve) => {
                const checkResolve = () => {
                    clearInterval(pollInterval);
                    resolve();
                };
                resolveGeneration = checkResolve;
                const pollInterval = setInterval(async () => {
                    try {
                        const resp = await fetch(`/check_status/${promptId}`);
                        const data = await resp.json();
                        if (data.status === 'finished') {
                            checkResolve();
                        }
                    } catch (err) {}
                }, 2000);
            });
        }

        async function runBatch() {
            const response = await fetch('/get_missing_characters');
            const data = await response.json();
            const missing = data.missing;

            if (missing.length === 0) {
                alert("No characters missing cover images.");
                return;
            }

            batchBtn.disabled = true;
            regenAllBtn.disabled = true;
            container.classList.remove('d-none');
            
            let completed = 0;
            for (const char of missing) {
                completed++;
                const percent = Math.round((completed / missing.length) * 100);
                progressBar.style.width = `${percent}%`;
                progressBar.textContent = `${percent}%`;
                statusText.textContent = `Batch Generating: ${completed} / ${missing.length}`;
                charNameText.textContent = `Current: ${char.name}`;

                try {
                    const genResp = await fetch(`/character/${char.slug}/generate`, {
                        method: 'POST',
                        body: new URLSearchParams({ 'action': 'replace', 'client_id': clientId }),
                        headers: { 'X-Requested-With': 'XMLHttpRequest' }
                    });
                    const genData = await genResp.json();
                    currentPromptId = genData.prompt_id;

                    await waitForCompletion(currentPromptId);

                    const finResp = await fetch(`/character/${char.slug}/finalize_generation/${currentPromptId}`, {
                        method: 'POST',
                        body: new URLSearchParams({ 'action': 'replace' })
                    });
                    const finData = await finResp.json();

                    if (finData.success) {
                        const img = document.getElementById(`img-${char.slug}`);
                        const noImgSpan = document.getElementById(`no-img-${char.slug}`);
                        if (img) {
                            img.src = finData.image_url;
                            img.classList.remove('d-none');
                        }
                        if (noImgSpan) noImgSpan.classList.add('d-none');
                    }
                } catch (err) {
                    console.error(`Failed for ${char.name}:`, err);
                }
            }

            statusText.textContent = "Batch Complete!";
            charNameText.textContent = "";
            batchBtn.disabled = false;
            regenAllBtn.disabled = false;
            setTimeout(() => { container.classList.add('d-none'); }, 5000);
        }

        batchBtn.addEventListener('click', async () => {
            const response = await fetch('/get_missing_characters');
            const data = await response.json();
            if (data.missing.length === 0) {
                alert("No characters missing cover images.");
                return;
            }
            if (!confirm(`Generate cover images for ${data.missing.length} characters?`)) return;
            runBatch();
        });

        regenAllBtn.addEventListener('click', async () => {
            if (!confirm("This will unassign ALL current cover images and generate new ones for every character. Existing files will be kept on disk. Proceed?")) return;
            
            const clearResp = await fetch('/clear_all_covers', { method: 'POST' });
            if (clearResp.ok) {
                // Update UI to show "No Image" for all
                document.querySelectorAll('.img-container img').forEach(img => img.classList.add('d-none'));
                document.querySelectorAll('.img-container .text-muted').forEach(span => span.classList.remove('d-none'));
                runBatch();
            }
        });
    });
</script>
{% endblock %}