{% extends "layout.html" %}

{% block title %}Télécharger - Spotify Downloader{% endblock %}

{% block content %}
<div class="row justify-content-center">
    <div class="col-lg-8">
        <div class="card">
            <div class="card-header">
                <h4 class="mb-0"><i class="bi bi-download me-2"></i>Nouveau téléchargement</h4>
            </div>
            <div class="card-body">
                <form id="downloadForm">
                    <div class="mb-3">
                        <label for="url" class="form-label">
                            <i class="bi bi-link-45deg me-1"></i>URL Spotify
                        </label>
                        <textarea 
                            class="form-control" 
                            id="url" 
                            name="url" 
                            rows="4" 
                            placeholder="Collez une ou plusieurs URLs Spotify (une par ligne)&#10;Exemple:&#10;https://open.spotify.com/track/...&#10;https://open.spotify.com/playlist/..."
                            required
                        ></textarea>
                        <div class="form-text">Accepte les tracks, albums et playlists Spotify</div>
                        <div id="urlError" class="text-danger mt-1" style="display: none;"></div>
                    </div>

                    <div class="row g-3 mb-3">
                        <div class="col-md-4">
                            <label for="format" class="form-label">
                                <i class="bi bi-music-note me-1"></i>Format
                            </label>
                            <select class="form-select" id="format" name="format">
                                <option value="mp3">MP3</option>
                                <option value="flac">FLAC</option>
                            </select>
                        </div>
                        <div class="col-md-4">
                            <label for="copy_choice" class="form-label">
                                <i class="bi bi-folder-plus me-1"></i>Copier vers NAS
                            </label>
                            <select class="form-select" id="copy_choice" name="copy_choice">
                                <option value="no">Non</option>
                                <option value="yes">Oui</option>
                            </select>
                        </div>
                        <div class="col-md-4 d-flex align-items-end">
                            <div class="form-check">
                                <input type="checkbox" class="form-check-input" id="delete_old" name="delete_old">
                                <label class="form-check-label" for="delete_old">Supprimer anciens fichiers</label>
                            </div>
                        </div>
                    </div>

                    <div class="d-grid gap-2 d-md-flex justify-content-md-end">
                        <button type="button" id="cancelBtn" class="btn btn-outline-danger me-md-2" disabled>
                            <i class="bi bi-x-circle me-1"></i>Annuler
                        </button>
                        <button type="submit" id="submitBtn" class="btn btn-spotify">
                            <i class="bi bi-download me-1"></i>Télécharger
                        </button>
                    </div>
                </form>

                <div id="downloadStatus" class="mt-4" style="display: none;">
                    <div class="d-flex justify-content-between align-items-center mb-2">
                        <span id="statusText" class="badge bg-info">En attente...</span>
                        <span id="progressText" class="text-muted small">0%</span>
                    </div>
                    <div id="progressContainer" class="progress mb-3 progress-indeterminate" style="height: 25px;">
                        <div id="progressBar" class="progress-bar progress-bar-striped progress-bar-animated" style="width: 100%;"></div>
                    </div>
                    <div class="output-box rounded p-3" id="logOutput" style="max-height: 400px; overflow-y: auto;">
                        <div class="text-muted text-center">En attente du téléchargement...</div>
                    </div>
                </div>
            </div>
        </div>

        {% if recent_downloads %}
        <div class="card mt-4">
            <div class="card-header d-flex justify-content-between align-items-center">
                <h5 class="mb-0"><i class="bi bi-clock-history me-2"></i>Téléchargements récents</h5>
                <a href="{{ url_for('history') }}" class="btn btn-sm btn-outline-light">Voir tout</a>
            </div>
            <div class="card-body p-0">
                <div class="list-group list-group-flush">
                    {% for dl in recent_downloads %}
                    <div class="list-group-item bg-transparent d-flex justify-content-between align-items-center">
                        <div>
                            <span class="badge bg-{{ 'success' if dl.status == 'completed' else 'danger' if dl.status == 'error' else 'warning' if dl.status == 'running' else 'secondary' }}">
                                {{ dl.status }}
                            </span>
                            <small class="text-muted ms-2">{{ dl.format_type.upper() }}</small>
                        </div>
                        <small class="text-muted">{{ dl.created_at.strftime('%d/%m %H:%M') }}</small>
                    </div>
                    {% endfor %}
                </div>
            </div>
        </div>
        {% endif %}
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script>
(function() {
    'use strict';

    const form = document.getElementById('downloadForm');
    const submitBtn = document.getElementById('submitBtn');
    const cancelBtn = document.getElementById('cancelBtn');
    const downloadStatus = document.getElementById('downloadStatus');
    const statusText = document.getElementById('statusText');
    const progressText = document.getElementById('progressText');
    const progressBar = document.getElementById('progressBar');
    const progressContainer = document.getElementById('progressContainer');
    const logOutput = document.getElementById('logOutput');
    const urlError = document.getElementById('urlError');

    let currentDownloadId = null;
    let eventSource = null;

    const spotifyPattern = /^https?:\/\/open\.spotify\.com\/[^/]+\/(track|album|playlist)\/[\w-]+/;

    function validateUrls(text) {
        const urls = text.split('\n').filter(u => u.trim());
        for (const url of urls) {
            if (!spotifyPattern.test(url.trim())) {
                return { valid: false, invalid: url };
            }
        }
        return { valid: true, count: urls.length };
    }

    document.getElementById('url').addEventListener('input', function() {
        const result = validateUrls(this.value);
        if (this.value.trim() && !result.valid) {
            urlError.textContent = `URL invalide: ${result.invalid.substring(0, 50)}...`;
            urlError.style.display = 'block';
        } else {
            urlError.style.display = 'none';
        }
    });

    function appendLog(message, type = 'info') {
        const lines = message.split('\n').filter(l => l.trim());
        lines.forEach(line => {
            const span = document.createElement('div');
            span.className = `log-${type}`;
            span.textContent = line;
            logOutput.appendChild(span);
        });
        logOutput.scrollTop = logOutput.scrollHeight;
    }

    function setStatus(status, progress) {
        const badges = {
            'pending': ['bg-secondary', 'En attente...'],
            'running': ['bg-warning', 'En cours...'],
            'completed': ['bg-success', 'Terminé !'],
            'error': ['bg-danger', 'Erreur'],
            'cancelled': ['bg-secondary', 'Annulé']
        };
        const [color, text] = badges[status] || ['bg-secondary', status];
        statusText.className = `badge ${color}`;
        statusText.textContent = text;
        progressText.textContent = `${progress}%`;
        
        if (status === 'running') {
            progressBar.classList.add('progress-bar-animated');
            progressBar.style.width = '100%';
            progressContainer.classList.add('progress-indeterminate');
        } else {
            progressBar.classList.remove('progress-bar-animated');
            progressBar.style.width = `${progress}%`;
            progressContainer.classList.remove('progress-indeterminate');
            
            if (status === 'completed') {
                progressBar.classList.remove('progress-bar-striped');
                showToast('Téléchargement terminé avec succès !', 'success');
            } else if (status === 'error') {
                showToast('Erreur lors du téléchargement', 'error');
            } else if (status === 'cancelled') {
                showToast('Téléchargement annulé', 'warning');
            }
        }
    }

    function startStream(downloadId) {
        if (eventSource) {
            eventSource.close();
        }
        
        eventSource = new EventSource(`/api/download/${downloadId}/stream`);
        
        eventSource.onmessage = function(e) {
            const [id, status, progress, log] = e.data.split('|');
            
            if (log !== '__END__' && log) {
                let type = 'info';
                if (log.includes('Erreur') || log.includes('Error')) type = 'error';
                else if (log.includes('terminé') || log.includes('Terminé')) type = 'success';
                else if (log.includes('Downloaded')) type = 'success';
                else if (log.includes('Ajout')) type = 'info';
                
                appendLog(log, type);
            }
            
            setStatus(status, parseInt(progress));
            
            if (status === 'completed' || status === 'error' || status === 'cancelled') {
                eventSource.close();
                eventSource = null;
                submitBtn.disabled = false;
                cancelBtn.disabled = true;
            }
        };

        eventSource.onerror = function() {
            eventSource.close();
            eventSource = null;
        };
    }

    form.addEventListener('submit', async function(e) {
        e.preventDefault();
        
        const urlValue = document.getElementById('url').value;
        const validation = validateUrls(urlValue);
        
        if (!validation.valid) {
            urlError.textContent = `URL invalide: ${validation.invalid.substring(0, 50)}...`;
            urlError.style.display = 'block';
            return;
        }

        const formData = {
            url: urlValue,
            format: document.getElementById('format').value,
            delete_old: document.getElementById('delete_old').checked,
            copy_choice: document.getElementById('copy_choice').value
        };

        submitBtn.disabled = true;
        cancelBtn.disabled = false;
        downloadStatus.style.display = 'block';
        logOutput.innerHTML = '';
        setStatus('pending', 0);
        appendLog(`Démarrage de ${validation.count} téléchargement(s)...`, 'info');

        try {
            const response = await fetch('/api/download', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(formData)
            });

            const data = await response.json();
            
            if (data.error) {
                appendLog(`Erreur: ${data.error}`, 'error');
                setStatus('error', 0);
                submitBtn.disabled = false;
                cancelBtn.disabled = true;
                return;
            }

            currentDownloadId = data.id;
            setStatus('running', 0);
            startStream(currentDownloadId);

        } catch (err) {
            appendLog(`Erreur réseau: ${err.message}`, 'error');
            setStatus('error', 0);
            submitBtn.disabled = false;
            cancelBtn.disabled = true;
        }
    });

    cancelBtn.addEventListener('click', async function() {
        if (!currentDownloadId) return;
        
        try {
            await fetch(`/api/download/${currentDownloadId}/cancel`, {
                method: 'POST'
            });
            appendLog('Annulation en cours...', 'warning');
        } catch (err) {
            appendLog(`Erreur: ${err.message}`, 'error');
        }
    });
})();
</script>
{% endblock %}