domili/stats.php

<?php
// PHP-Logik für die Datenabfrage
include('inc/check_login.php');
include('inc/check_admin.php');
require_once('inc/db.php');

// --- 1. Jährliche Strafen-Statistik ---
// Passen Sie hier das Datum der Abschlussveranstaltung an.
$last_reset_date = '2024-01-01';

$penalties_data = [];
$total_penalties = 0;
$total_due = 0;
// Passen Sie hier die Höhe der Strafe in Euro an.
$penalty_amount = 1;

// SQL-Abfrage, um Strafen pro Benutzer seit dem letzten Reset-Datum zu zählen
// Strafe = anwesend (attended=1) aber Farbe nicht getragen (wore_color=0)
$sql_penalties = "
    SELECT
        u.username,
        COUNT(mt.user_id) AS penalty_count
    FROM meeting_teilnehmer mt
    JOIN meetings m ON mt.meeting_id = m.id
    JOIN users u ON mt.user_id = u.id
    WHERE m.meeting_date >= ? AND mt.attended = 1 AND mt.wore_color = 0
    GROUP BY u.username
    ORDER BY penalty_count DESC
";
$stmt = mysqli_prepare($conn, $sql_penalties);
// Überprüfen, ob das Statement erfolgreich vorbereitet wurde
if ($stmt === false) {
    die("Fehler bei der SQL-Abfrage: " . mysqli_error($conn));
}
mysqli_stmt_bind_param($stmt, "s", $last_reset_date);
mysqli_stmt_execute($stmt);
$result = mysqli_stmt_get_result($stmt);

while ($row = mysqli_fetch_assoc($result)) {
    $penalties_data[] = $row;
    $total_penalties += $row['penalty_count'];
    $total_due += $row['penalty_count'] * $penalty_amount;
}
mysqli_stmt_close($stmt);

// --- 2. Gesamt-Statistiken ---

// Statistik 1: Häufigkeit der gewählten Farben
$color_stats = [];
$sql_colors = "
    SELECT
        c.name,
        c.hex_code,
        COUNT(m.id) AS meeting_count
    FROM meetings m
    JOIN colors c ON m.color_id = c.id
    GROUP BY c.name, c.hex_code
    ORDER BY meeting_count DESC
";
$result = mysqli_query($conn, $sql_colors);
while ($row = mysqli_fetch_assoc($result)) {
    $color_stats[] = $row;
}

// Statistik 2: Teilnahmequote pro Benutzer
$participation_stats = [];
$sql_participation = "
    SELECT
        u.username,
        COUNT(mt.user_id) AS total_attendance
    FROM meeting_teilnehmer mt
    JOIN users u ON mt.user_id = u.id
    WHERE mt.attended = 1
    GROUP BY u.username
    ORDER BY total_attendance DESC
";
$result = mysqli_query($conn, $sql_participation);
while ($row = mysqli_fetch_assoc($result)) {
    $participation_stats[] = $row;
}

// Header einbinden
require_once 'inc/header.php';
?>

<div class="container mt-5">
    <h2 class="mb-4">Statistiken & Auswertung</h2>

    <div class="card shadow mb-4">
        <div class="card-header bg-danger-subtle text-danger">
            <h4 class="mb-0">Aktuelle Strafen (seit <?= date('d.m.Y', strtotime($last_reset_date)); ?>)</h4>
        </div>
        <div class="card-body">
            <p class="fs-5 fw-bold text-center">
                Gesamtzahl der Strafen: <span class="badge bg-danger"><?= $total_penalties ?></span><br>
                Fälliger Gesamtbetrag: <span class="text-danger fw-bold"><?= number_format($total_due, 2, ',', '.'); ?> €</span>
            </p>

            <?php if (empty($penalties_data)): ?>
                <div class="alert alert-info text-center" role="alert">
                    Bisher wurden keine Strafen verzeichnet.
                </div>
            <?php else: ?>
                <div class="table-responsive">
                    <table class="table table-striped table-hover">
                        <thead>
                            <tr>
                                <th>Benutzer</th>
                                <th>Anzahl Strafen</th>
                                <th>Fälliger Betrag</th>
                            </tr>
                        </thead>
                        <tbody>
                            <?php foreach ($penalties_data as $penalty): ?>
                                <tr>
                                    <td><?= htmlspecialchars($penalty['username']); ?></td>
                                    <td><?= htmlspecialchars($penalty['penalty_count']); ?></td>
                                    <td><?= number_format($penalty['penalty_count'] * $penalty_amount, 2, ',', '.'); ?> €</td>
                                </tr>
                            <?php endforeach; ?>
                        </tbody>
                    </table>
                </div>
            <?php endif; ?>
        </div>
    </div>

    ---

    <div class="card shadow mb-4">
        <div class="card-header bg-secondary bg-opacity-50 text-secondary">
            <h4 class="mb-0">Gesamt-Statistiken (Alle Zeiten)</h4>
        </div>
        <div class="card-body">
            <h5 class="card-title">Häufigkeit der gewählten Farben</h5>
            <canvas id="colorChart" class="mb-4"></canvas>

            <h5 class="card-title">Teilnahme-Ranking</h5>
            <canvas id="participationChart"></canvas>
        </div>
    </div>
</div>

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>

<script>
    document.addEventListener('DOMContentLoaded', function() {
        // Daten für Farbhäufigkeits-Diagramm
        const colorData = {
            labels: <?= json_encode(array_column($color_stats, 'name')); ?>,
            datasets: [{
                label: 'Anzahl Treffen',
                data: <?= json_encode(array_column($color_stats, 'meeting_count')); ?>,
                backgroundColor: <?= json_encode(array_column($color_stats, 'hex_code')); ?>,
                borderColor: 'rgba(0, 0, 0, 0.1)',
                borderWidth: 1
            }]
        };

        const colorConfig = {
            type: 'pie',
            data: colorData,
            options: {
                responsive: true,
                plugins: {
                    legend: {
                        position: 'top',
                    },
                    title: {
                        display: true,
                        text: 'Verteilung der Farbwahl über alle Treffen'
                    }
                }
            }
        };

        new Chart(
            document.getElementById('colorChart'),
            colorConfig
        );

        // Daten für Teilnahme-Diagramm
        const participationData = {
            labels: <?= json_encode(array_column($participation_stats, 'username')); ?>,
            datasets: [{
                label: 'Anzahl Teilnahmen',
                data: <?= json_encode(array_column($participation_stats, 'total_attendance')); ?>,
                backgroundColor: 'rgba(54, 162, 235, 0.8)',
                borderColor: 'rgb(54, 162, 235)',
                borderWidth: 1
            }]
        };

        const participationConfig = {
            type: 'bar',
            data: participationData,
            options: {
                indexAxis: 'y',
                responsive: true,
                plugins: {
                    legend: {
                        display: false
                    },
                    title: {
                        display: true,
                        text: 'Anzahl der Teilnahmen pro Benutzer'
                    }
                },
                scales: {
                    x: {
                        beginAtZero: true
                    }
                }
            }
        };

        new Chart(
            document.getElementById('participationChart'),
            participationConfig
        );
    });
</script>

<?php include('inc/footer.php'); ?>