<?php
require_once __DIR__ . '/db/config.php';
require_once __DIR__ . '/mail/MailService.php';

$secret_token = 'lili_admin_2026';
if (($_GET['token'] ?? '') !== $secret_token) {
    die('Acceso denegado.');
}

$db = db();
$action = $_GET['action'] ?? 'preview';

// 1. Get stats for the last 7 days
$stats_query = "
    SELECT 
        COUNT(*) as total_requests,
        SUM(CASE WHEN source = 'whatsapp' THEN 1 ELSE 0 END) as whatsapp_requests,
        SUM(CASE WHEN source != 'whatsapp' OR source IS NULL THEN 1 ELSE 0 END) as web_requests
    FROM song_requests 
    WHERE created_at > DATE_SUB(NOW(), INTERVAL 7 DAY)
";
$totals = $db->query($stats_query)->fetch();

// 2. Top 10 Requesters
$top_requesters = $db->query("
    SELECT requester, COUNT(*) as count 
    FROM song_requests 
    WHERE created_at > DATE_SUB(NOW(), INTERVAL 7 DAY)
    AND requester IS NOT NULL AND requester != '' AND requester != 'Anónimo'
    GROUP BY requester 
    ORDER BY count DESC 
    LIMIT 10
")->fetchAll();

// 3. Top 10 Songs (by requests)
$top_songs_requested = $db->query("
    SELECT artist, song, COUNT(*) as count 
    FROM song_requests 
    WHERE created_at > DATE_SUB(NOW(), INTERVAL 7 DAY)
    GROUP BY artist, song 
    ORDER BY count DESC 
    LIMIT 10
")->fetchAll();

// 4. Top 10 Songs (by likes)
$top_songs_liked = $db->query("
    SELECT song_title, likes_count 
    FROM song_likes 
    WHERE last_liked_at >= DATE_SUB(NOW(), INTERVAL 7 DAY)
    ORDER BY likes_count DESC 
    LIMIT 10
")->fetchAll();

// 5. Top 10 Chat Interactors
$top_chatters = $db->query("
    SELECT username, COUNT(*) as count 
    FROM messages 
    WHERE created_at > DATE_SUB(NOW(), INTERVAL 7 DAY)
    AND username IS NOT NULL AND username != '' AND username != 'Anónimo'
    GROUP BY username 
    ORDER BY count DESC 
    LIMIT 10
")->fetchAll();

$report_date = date('d/m/Y');
$week_start = date('d/m/Y', strtotime('-7 days'));

$html_content = "
<!DOCTYPE html>
<html>
<head>
    <style>
        body { font-family: 'Helvetica', Arial, sans-serif; color: #333; line-height: 1.6; }
        .container { max-width: 800px; margin: 0 auto; padding: 20px; border: 1px solid #eee; }
        .header { text-align: center; border-bottom: 2px solid #00e676; padding-bottom: 20px; margin-bottom: 30px; }
        .logo { width: 80px; height: 80px; border-radius: 50%; }
        h1 { color: #00e676; margin-bottom: 5px; }
        .subtitle { color: #666; font-size: 0.9rem; }
        .grid { display: flex; gap: 20px; margin-bottom: 30px; }
        .stat-card { flex: 1; background: #f9f9f9; padding: 15px; border-radius: 10px; text-align: center; border: 1px solid #eee; }
        .stat-card h3 { margin: 0; font-size: 0.8rem; color: #888; text-transform: uppercase; }
        .stat-card .value { font-size: 1.8rem; font-weight: bold; color: #00e676; }
        table { width: 100%; border-collapse: collapse; margin-bottom: 30px; }
        th { background: #f4f4f4; text-align: left; padding: 10px; border-bottom: 2px solid #ddd; }
        td { padding: 10px; border-bottom: 1px solid #eee; }
        .crown { color: #ffca28; }
        .reward-badge { background: #fff9c4; color: #f57f17; padding: 2px 6px; border-radius: 4px; font-size: 0.75rem; font-weight: bold; border: 1px solid #fbc02d; }
        .badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 0.8rem; background: #eee; }
        .badge-wa { background: #e8f5e9; color: #2e7d32; }
        .badge-web { background: #e3f2fd; color: #1565c0; }
        .footer { text-align: center; font-size: 0.8rem; color: #999; margin-top: 40px; border-top: 1px solid #eee; padding-top: 20px; }
    </style>
</head>
<body>
    <div class='container'>
        <div class='header'>
            <h1>Reporte Semanal Lili Records Radio</h1>
            <p class='subtitle'>Periodo: $week_start al $report_date</p>
        </div>

        <div class='grid'>
            <div class='stat-card'>
                <h3>Total Peticiones</h3>
                <div class='value'>{$totals['total_requests']}</div>
            </div>
            <div class='stat-card'>
                <h3>Vía WhatsApp</h3>
                <div class='value'>{$totals['whatsapp_requests']}</div>
            </div>
            <div class='stat-card'>
                <h3>Vía Web</h3>
                <div class='value'>{$totals['web_requests']}</div>
            </div>
        </div>

        <h2>🏆 Top 10 Oyentes de la Semana</h2>
        <table>
            <thead>
                <tr>
                    <th>#</th>
                    <th>Oyente</th>
                    <th>Peticiones</th>
                </tr>
            </thead>
            <tbody>";
foreach ($top_requesters as $i => $r) {
    $crown = ($i === 0) ? "<span class='crown'>👑</span> " : "";
    $html_content .= "
                <tr>
                    <td style='width: 40px;'>" . ($i + 1) . "</td>
                    <td>$crown" . htmlspecialchars($r['requester']) . "</td>
                    <td><b>" . $r['count'] . "</b></td>
                </tr>";
}
$html_content .= "
            </tbody>
        </table>

        <h2>💬 Top 10 Interactores del Chat</h2>
        <table>
            <thead>
                <tr>
                    <th>#</th>
                    <th>Usuario</th>
                    <th>Mensajes</th>
                    <th>Recompensa Semanal</th>
                </tr>
            </thead>
            <tbody>";
foreach ($top_chatters as $i => $c) {
    $emoji = ($i === 0) ? "👑 " : "💬 ";
    $reward = "";
    if ($i == 0) $reward = "<span class='reward-badge'>+50 Fan Points</span>";
    elseif ($i == 1) $reward = "<span class='reward-badge'>+30 Fan Points</span>";
    elseif ($i == 2) $reward = "<span class='reward-badge'>+20 Fan Points</span>";
    
    $html_content .= "
                <tr>
                    <td style='width: 40px;'>" . ($i + 1) . "</td>
                    <td>$emoji" . htmlspecialchars($c['username']) . "</td>
                    <td><b>" . $c['count'] . "</b></td>
                    <td>$reward</td>
                </tr>";
}
$html_content .= "
            </tbody>
        </table>

        <h2>🎵 Top Canciones (Más Pedidas)</h2>
        <table>
            <thead>
                <tr>
                    <th>Canción</th>
                    <th>Artista</th>
                    <th>Veces</th>
                </tr>
            </thead>
            <tbody>";
foreach ($top_songs_requested as $s) {
    $html_content .= "
                <tr>
                    <td>" . htmlspecialchars($s['song']) . "</td>
                    <td>" . htmlspecialchars($s['artist']) . "</td>
                    <td><b>" . $s['count'] . "</b></td>
                </tr>";
}
$html_content .= "
            </tbody>
        </table>

        <h2>⭐ Top Canciones (Más Likes)</h2>
        <table>
            <thead>
                <tr>
                    <th>Canción</th>
                    <th>Likes</th>
                </tr>
            </thead>
            <tbody>";
foreach ($top_songs_liked as $s) {
    $html_content .= "
                <tr>
                    <td>" . htmlspecialchars($s['song_title']) . "</td>
                    <td><span style='color: #ff4081;'>❤</span> " . $s['likes_count'] . "</td>
                </tr>";
}
$html_content .= "
            </tbody>
        </table>

        <div class='footer'>
            Este es un reporte automático generado por el sistema de Lili Records Radio.<br>
            © " . date('Y') . " Lili Records. Todos los derechos reservados.
        </div>
    </div>
</body>
</html>
";

if ($action === 'send') {
    // Award points if not already awarded this week (optional safety, but let's keep it simple for now as requested for the automatic part)
    // Actually, let's keep the reward logic in the cron as the "official" automated trigger.
    // However, to be consistent, if they send it manually, we could also trigger it.
    // Let's add the reward logic here too, but ONLY if it hasn't been run today.
    
    $today = date('Y-m-d');
    $stmt = $db->prepare("SELECT last_run FROM automation_logs WHERE task_name = 'weekly_report_rewards' AND DATE(last_run) = ?");
    $stmt->execute([$today]);
    
    if (!$stmt->fetch()) {
        require_once __DIR__ . '/includes/points_helper.php';
        $rewards = [50, 30, 20];
        $rewarded_users = [];
        foreach ($top_chatters as $i => $c) {
            if ($i >= 3) break;
            $username = $c['username'];
            $points_to_add = $rewards[$i];
            
            awardPoints($username, $points_to_add);
            $rewarded_users[$username] = $points_to_add;
        }

        // Bot message to chat
        if (!empty($rewarded_users)) {
            $bot_msg = "🏆 ¡Atención comunidad! El Top 3 de interactores de esta semana ha sido premiado:\n\n";
            $medals = ["🥇", "🥈", "🥉"];
            $idx = 0;
            foreach ($rewarded_users as $user => $pts) {
                $bot_msg .= "{$medals[$idx]} $user: +$pts Fan Points\n";
                $idx++;
            }
            $bot_msg .= "\n¡Sigue participando en el chat para ganar el próximo lunes! 📻✨";
            
            $db->prepare("INSERT INTO messages (username, ip_address, message, type) VALUES (?, ?, ?, ?)")
               ->execute(['Lili Bot 🤖', '127.0.0.1', $bot_msg, 'text']);
        }

        $db->prepare("INSERT INTO automation_logs (task_name, last_run) VALUES ('weekly_report_rewards', NOW()) ON DUPLICATE KEY UPDATE last_run = NOW()")->execute();
    }

    $subject = "📊 Reporte de Actividad Semanal - Lili Records Radio ($report_date)";
    $res = MailService::sendMail(null, $subject, $html_content);
    
    header('Content-Type: application/json');
    echo json_encode($res);
    exit;
}

// Default action: preview
echo $html_content;
if ($action === 'preview') {
    echo "
    <div style='position: fixed; bottom: 20px; right: 20px; display: flex; gap: 10px;'>
        <button onclick='window.print()' style='background: #0d6efd; color: white; border: none; padding: 10px 20px; border-radius: 5px; cursor: pointer; font-weight: bold;'>🖨️ Descargar PDF</button>
        <button onclick='sendByEmail()' id='sendBtn' style='background: #00e676; color: white; border: none; padding: 10px 20px; border-radius: 5px; cursor: pointer; font-weight: bold;'>📧 Enviar por Email</button>
    </div>
    <script>
    async function sendByEmail() {
        const btn = document.getElementById('sendBtn');
        btn.disabled = true;
        btn.innerText = 'Enviando...';
        try {
            const res = await fetch('weekly_report.php?token=$secret_token&action=send');
            const data = await res.json();
            if (data.success) {
                alert('¡Reporte enviado con éxito!');
                btn.innerText = '✅ Enviado';
            } else {
                alert('Error al enviar: ' + data.error);
                btn.disabled = false;
                btn.innerText = '📧 Reintentar Envío';
            }
        } catch (e) {
            alert('Error de conexión.');
            btn.disabled = false;
            btn.innerText = '📧 Reintentar Envío';
        }
    }
    </script>
    ";
}
