{% extends "base.html" %}

{% block title %}Statistieken - Snauw Counter{% endblock %}

{% block head %}
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
{% endblock %}

{% block content %}
<h2>📈 Statistieken & Trends</h2>

<!-- Statistiek overzicht -->
<div class="stats-grid">
    <div class="stat-card">
        <span class="stat-number">{{ stats.total_incidents }}</span>
        <span class="stat-label">Totaal incidenten</span>
    </div>
    <div class="stat-card">
        <span class="stat-number">{{ stats.incidents_today }}</span>
        <span class="stat-label">Vandaag</span>
    </div>
    <div class="stat-card">
        <span class="stat-number">{{ stats.avg_severity }}</span>
        <span class="stat-label">Gemiddelde Snauw-index</span>
    </div>
    <div class="stat-card">
        <span class="stat-number">{{ stats.most_severe }}</span>
        <span class="stat-label">Hoogste Snauw-index</span>
    </div>
</div>

<!-- Trend grafiek -->
{% if stats.total_incidents > 0 %}
<div class="card">
    <h3>📊 Trend laatste 7 dagen</h3>
    <div class="chart-container">
        <canvas id="trendChart"></canvas>
    </div>
</div>

<!-- Periode statistieken -->
<div class="card">
    <h3>📅 Periode overzicht</h3>
    <div class="stats-grid">
        <div class="stat-card">
            <span class="stat-number">{{ stats.incidents_this_week }}</span>
            <span class="stat-label">Deze week</span>
        </div>
        <div class="stat-card">
            <span class="stat-number">{{ stats.incidents_this_month }}</span>
            <span class="stat-label">Deze maand</span>
        </div>
    </div>
</div>

<!-- Recent incidents -->
<div class="card">
    <h3>🕒 Recente incidenten</h3>
    {% if incidents %}
        <div style="max-height: 300px; overflow-y: auto;">
            {% for incident in incidents[:10] %}
                <div style="display: flex; justify-content: space-between; align-items: center; padding: 0.5rem 0; border-bottom: 1px solid #e9ecef;">
                    <div>
                        <strong>Snauw-index {{ incident.severity }}/5</strong>
                        {% if incident.notes %}
                            <br><small style="color: #6c757d;">{{ incident.notes[:50] }}{% if incident.notes|length > 50 %}...{% endif %}</small>
                        {% endif %}
                    </div>
                    <small style="color: #6c757d;">
                        {{ incident.timestamp.strftime('%d/%m %H:%M') }}
                    </small>
                </div>
            {% endfor %}
        </div>
        {% if incidents|length > 10 %}
            <p style="margin-top: 1rem; color: #6c757d; text-align: center;">
                En {{ incidents|length - 10 }} andere incidenten...
            </p>
        {% endif %}
    {% else %}
        <p style="color: #6c757d;">Nog geen incidenten geregistreerd</p>
    {% endif %}
</div>

{% else %}
<!-- Geen data yet -->
<div class="card" style="text-align: center; padding: 3rem;">
    <h3>📊 Nog geen statistieken</h3>
    <p style="color: #6c757d; margin-bottom: 2rem;">
        Registreer je eerste incident om statistieken te zien
    </p>
    <a href="{{ url_for('main.index') }}" class="btn">📝 Eerste incident toevoegen</a>
</div>
{% endif %}

<!-- GDPR compliance section -->
<div class="card" style="border-left: 4px solid #ffc107;">
    <h4>🔒 Privacy & Gegevensbeheer</h4>
    <p>Je hebt altijd controle over je gegevens:</p>

    <div style="display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem;">
        <button onclick="exportData()" class="btn btn-secondary">📥 Data exporteren</button>

        {% if current_user.is_authenticated %}
            <form action="{{ url_for('main.delete_account') }}" method="POST" style="display: inline;"
                  onsubmit="return confirm('Type DELETE om te bevestigen') && prompt('Type DELETE:') === 'DELETE'">
                <input type="hidden" name="confirm" value="DELETE">
                <button type="submit" class="btn btn-danger">🗑️ Account verwijderen</button>
            </form>
        {% else %}
            <button onclick="deleteAllData()" class="btn btn-danger">🗑️ Alle data wissen</button>
        {% endif %}
    </div>

    <p style="margin-top: 1rem; font-size: 0.9rem; color: #6c757d;">
        <a href="{{ url_for('main.privacy') }}" style="color: inherit;">Privacy beleid</a> |
        Conform AVG/GDPR
    </p>
</div>
{% endblock %}

{% block scripts %}
<script>
// Mark body as authenticated for JavaScript
document.body.dataset.isAuthenticated = {{ 'true' if current_user.is_authenticated else 'false' }};

{% if stats.total_incidents > 0 %}
// Chart.js implementation
const trendData = {{ stats.trend_data | tojson }};

const ctx = document.getElementById('trendChart').getContext('2d');
new Chart(ctx, {
    type: 'bar',
    data: {
        labels: trendData.map(d => d.date),
        datasets: [{
            label: 'Aantal incidenten',
            data: trendData.map(d => d.count),
            backgroundColor: 'rgba(102, 126, 234, 0.6)',
            borderColor: 'rgba(102, 126, 234, 1)',
            borderWidth: 2,
            yAxisID: 'y'
        }, {
            label: 'Gemiddelde Snauw-index',
            data: trendData.map(d => d.avg_severity),
            type: 'line',
            borderColor: 'rgba(220, 53, 69, 1)',
            backgroundColor: 'rgba(220, 53, 69, 0.1)',
            borderWidth: 3,
            fill: false,
            yAxisID: 'y1'
        }]
    },
    options: {
        responsive: true,
        maintainAspectRatio: false,
        plugins: {
            title: {
                display: true,
                text: 'Incident Trends (Laatste 7 dagen)'
            },
            legend: {
                display: true
            }
        },
        scales: {
            y: {
                type: 'linear',
                display: true,
                position: 'left',
                beginAtZero: true,
                title: {
                    display: true,
                    text: 'Aantal incidenten'
                }
            },
            y1: {
                type: 'linear',
                display: true,
                position: 'right',
                min: 0,
                max: 5,
                title: {
                    display: true,
                    text: 'Gemiddelde Snauw-index'
                },
                grid: {
                    drawOnChartArea: false,
                }
            }
        },
        interaction: {
            mode: 'index',
            intersect: false,
        }
    }
});
{% endif %}

// Load anonymous user data if not authenticated
if (!{{ 'true' if current_user.is_authenticated else 'false' }}) {
    // This would enhance the statistics with localStorage data
    enhanceWithLocalData();
}

function enhanceWithLocalData() {
    // For anonymous users, we could enhance server statistics
    // with localStorage data that might not be synced yet
    const localIncidents = JSON.parse(localStorage.getItem('snauw_incidents') || '[]');

    if (localIncidents.length > 0) {
        // Add notification about local data
        const notice = document.createElement('div');
        notice.className = 'alert alert-info';
        notice.innerHTML = `
            ℹ️ Je hebt ${localIncidents.length} lokaal opgeslagen incidenten.
            <a href="{{ url_for('main.register') }}">Maak een account</a> om deze veilig op te slaan.
        `;
        document.querySelector('main').insertBefore(notice, document.querySelector('main').firstChild);
    }
}
</script>
{% endblock %}