{% extends "base.html" %}
{% block title %}仪表盘 - Squid Manager{% endblock %}
{% block head %}
<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.0/dist/chart.umd.min.js"></script>
{% endblock %}

{% block content %}
<div class="page-header">
    <h1>📊 日志分析仪表盘</h1>
    <div class="page-actions">
        <span class="meta-text">
            {% if stats.time_start and stats.time_end %}
                范围: {{ stats.time_start.strftime('%Y-%m-%d %H:%M:%S UTC') }} ~
                {{ stats.time_end.strftime('%Y-%m-%d %H:%M:%S UTC') }}
            {% else %}
                暂无日志数据
            {% endif %}
        </span>
        <span class="meta-text">共解析 {{ entries_count }} 条</span>
        <button onclick="refreshLogs()" class="btn btn-small btn-secondary">🔄 刷新</button>
    </div>
</div>

{% if active_alerts %}
<div class="card" style="border-left: 4px solid #ef4444;">
    <h3 class="card-title">🚨 当前活跃告警 ({{ active_alerts | length }})</h3>
    <ul class="active-alerts">
    {% for a in active_alerts %}
        <li>
            <span class="badge badge-{% if a.severity == 'critical' %}red{% elif a.severity == 'warning' %}yellow{% else %}blue{% endif %}">{{ a.severity }}</span>
            {{ a.message }}
            — <a href="{{ url_for('alerts_view') }}">管理规则</a>
        </li>
    {% endfor %}
    </ul>
</div>
{% endif %}

{% if entries_count == 0 %}
<div class="card">
    <div class="card-empty">
        <div class="empty-icon">📭</div>
        <h2>暂无日志数据</h2>
        <p>请检查访问日志路径是否正确，或
            <a href="{{ url_for('logs_import') }}">手动导入日志</a>进行分析。</p>
        <p class="meta-text">当前路径: <code>{{ cfg.access_log_path }}</code></p>
        <p class="meta-text">如需修改，请前往 <a href="{{ url_for('config_paths') }}">路径设置</a></p>
    </div>
</div>
{% else %}

<!-- KPI cards -->
<div class="kpi-grid">
    <div class="kpi-card kpi-blue">
        <div class="kpi-label">总请求数</div>
        <div class="kpi-value">{{ stats.total_requests | thousands }}</div>
        <div class="kpi-meta">{{ stats.unique_clients }} 个客户端 · {{ stats.unique_hosts }} 个目标主机</div>
    </div>
    <div class="kpi-card kpi-green">
        <div class="kpi-label">缓存命中率</div>
        <div class="kpi-value">{{ '%.1f' % (stats.hit_ratio * 100) }}%</div>
        <div class="kpi-meta">命中 {{ stats.hits }} · 未命中 {{ stats.misses }}</div>
    </div>
    <div class="kpi-card kpi-purple">
        <div class="kpi-label">总流量</div>
        <div class="kpi-value">{{ format_bytes(stats.total_bytes) }}</div>
        <div class="kpi-meta">平均 {{ format_bytes(stats.avg_size_bytes) }}/请求</div>
    </div>
    <div class="kpi-card kpi-orange">
        <div class="kpi-label">平均响应时间</div>
        <div class="kpi-value">{{ format_duration(stats.avg_elapsed_ms) }}</div>
        <div class="kpi-meta">总耗时 {{ format_duration(stats.total_elapsed_ms) }}</div>
    </div>
    <div class="kpi-card kpi-red">
        <div class="kpi-label">拒绝率</div>
        <div class="kpi-value">{{ '%.2f' % (stats.denied_rate * 100) }}%</div>
        <div class="kpi-meta">{{ stats.denied }} 条被 ACL 拒绝</div>
    </div>
    <div class="kpi-card kpi-yellow">
        <div class="kpi-label">中断率</div>
        <div class="kpi-value">{{ '%.2f' % (stats.aborted_rate * 100) }}%</div>
        <div class="kpi-meta">{{ stats.aborted }} 条客户端中断</div>
    </div>
    <div class="kpi-card kpi-cyan">
        <div class="kpi-label">4xx 错误率</div>
        <div class="kpi-value">{{ '%.2f' % (stats.errors_4xx_rate * 100) }}%</div>
        <div class="kpi-meta">{{ stats.errors_4xx_count }} 条</div>
    </div>
    <div class="kpi-card kpi-pink">
        <div class="kpi-label">5xx 错误率</div>
        <div class="kpi-value">{{ '%.2f' % (stats.errors_5xx_rate * 100) }}%</div>
        <div class="kpi-meta">{{ stats.errors_5xx_count }} 条</div>
    </div>
</div>

<!-- Hourly traffic chart -->
<div class="card chart-card">
    <h3 class="card-title">📈 每小时请求量与流量</h3>
    <div class="chart-container">
        <canvas id="hourlyChart" height="100"></canvas>
    </div>
</div>

<div class="grid-2">
    <!-- Result code distribution -->
    <div class="card chart-card">
        <h3 class="card-title">🏷️ Squid 结果码分布</h3>
        <div class="chart-container">
            <canvas id="resultChart" height="200"></canvas>
        </div>
        <details class="legend-details">
            <summary>结果码含义</summary>
            <table class="legend-table">
                <thead><tr><th>代码</th><th>含义</th></tr></thead>
                <tbody>
                {% for code, desc in stats.result_code_legend.items() %}
                    <tr><td><code>{{ code }}</code></td><td>{{ desc }}</td></tr>
                {% endfor %}
                </tbody>
            </table>
        </details>
    </div>
    <!-- HTTP status distribution -->
    <div class="card chart-card">
        <h3 class="card-title">🌐 HTTP 状态码分布</h3>
        <div class="chart-container">
            <canvas id="httpChart" height="200"></canvas>
        </div>
        {% if stats.by_http %}
        <table class="data-table small">
            <thead><tr><th>状态码</th><th>次数</th><th>占比</th></tr></thead>
            <tbody>
            {% for code, n in stats.by_http[:10] %}
            <tr>
                <td><span class="badge badge-{% if code|first == '2' %}green{% elif code|first == '3' %}blue{% elif code|first == '4' %}orange{% elif code|first == '5' %}red{% else %}gray{% endif %}">{{ code }}</span></td>
                <td>{{ n | thousands }}</td>
                <td>{{ '%.1f' % (n / stats.total_requests * 100) }}%</td>
            </tr>
            {% endfor %}
            </tbody>
        </table>
        {% endif %}
    </div>
</div>

<div class="grid-2">
    <!-- Method distribution -->
    <div class="card chart-card">
        <h3 class="card-title">🚀 HTTP 方法分布</h3>
        <div class="chart-container">
            <canvas id="methodChart" height="200"></canvas>
        </div>
    </div>
    <!-- Category distribution -->
    <div class="card chart-card">
        <h3 class="card-title">📂 请求分类</h3>
        <div class="chart-container">
            <canvas id="categoryChart" height="200"></canvas>
        </div>
        <p class="meta-text">Hit=缓存命中, Miss=未命中, Tunnel=CONNECT隧道,
            Denied=被拒, Aborted=中断, Error=错误</p>
    </div>
</div>

<div class="grid-2">
    <!-- Top clients -->
    <div class="card">
        <h3 class="card-title">👥 Top 客户端 (按请求数)</h3>
        <table class="data-table">
            <thead><tr><th>#</th><th>客户端 IP</th><th>请求数</th><th>流量</th><th>占比</th></tr></thead>
            <tbody>
            {% for c in stats.top_clients[:20] %}
            <tr>
                <td>{{ loop.index }}</td>
                <td><a href="{{ url_for('client_detail', ip=c.client) }}">{{ c.client }}</a></td>
                <td>{{ c.count | thousands }}</td>
                <td>{{ format_bytes(c.bytes) }}</td>
                <td>{{ '%.1f' % (c.count / stats.total_requests * 100) }}%</td>
            </tr>
            {% endfor %}
            </tbody>
        </table>
    </div>
    <!-- Top hosts -->
    <div class="card">
        <h3 class="card-title">🌍 Top 目标主机 (按请求数)</h3>
        <table class="data-table">
            <thead><tr><th>#</th><th>目标主机</th><th>请求数</th><th>流量</th><th>占比</th></tr></thead>
            <tbody>
            {% for h in stats.top_hosts[:20] %}
            <tr>
                <td>{{ loop.index }}</td>
                <td><a href="{{ url_for('logs_view', host=h.host) }}">{{ h.host }}</a></td>
                <td>{{ h.count | thousands }}</td>
                <td>{{ format_bytes(h.bytes) }}</td>
                <td>{{ '%.1f' % (h.count / stats.total_requests * 100) }}%</td>
            </tr>
            {% endfor %}
            </tbody>
        </table>
    </div>
</div>

<div class="grid-2">
    <!-- Hierarchy distribution -->
    <div class="card">
        <h3 class="card-title">🔗 层级代码分布 (Hierarchy)</h3>
        <table class="data-table">
            <thead><tr><th>层级代码</th><th>次数</th><th>含义</th></tr></thead>
            <tbody>
            {% for hier, n in stats.by_hierarchy[:15] %}
            <tr>
                <td><code>{{ hier }}</code></td>
                <td>{{ n | thousands }}</td>
                <td>{{ stats.hierarchy_legend.get(hier, '-') }}</td>
            </tr>
            {% endfor %}
            </tbody>
        </table>
    </div>
    <!-- Content type -->
    <div class="card">
        <h3 class="card-title">📦 Content-Type 分布</h3>
        <table class="data-table">
            <thead><tr><th>Content-Type</th><th>次数</th><th>占比</th></tr></thead>
            <tbody>
            {% for ct, n in stats.by_ctype[:15] %}
            <tr>
                <td><code>{{ ct }}</code></td>
                <td>{{ n | thousands }}</td>
                <td>{{ '%.1f' % (n / stats.total_requests * 100) }}%</td>
            </tr>
            {% endfor %}
            </tbody>
        </table>
    </div>
</div>

<!-- Top URLs -->
<div class="card">
    <h3 class="card-title">🔗 Top URL (访问最多的资源)</h3>
    <table class="data-table">
        <thead><tr><th>#</th><th>URL</th><th>访问次数</th></tr></thead>
        <tbody>
        {% for u in stats.top_urls[:20] %}
        <tr>
            <td>{{ loop.index }}</td>
            <td class="url-cell"><a href="{{ url_for('logs_view', url=u.url) }}" title="{{ u.url }}">{{ u.url }}</a></td>
            <td>{{ u.count | thousands }}</td>
        </tr>
        {% endfor %}
        </tbody>
    </table>
</div>

{% endif %}

{% endblock %}

{% block scripts %}
<script>
const HOURLY = {{ stats.hourly | tojson }};
const BY_RESULT = {{ stats.by_result | tojson }};
const BY_HTTP = {{ stats.by_http | tojson }};
const BY_METHOD = {{ stats.by_method | tojson }};
const BY_CATEGORY = {{ stats.by_category | tojson }};

const COLORS = ['#3b82f6','#ef4444','#10b981','#f59e0b','#8b5cf6','#ec4899','#06b6d4','#84cc16','#f97316','#6366f1','#14b8a6','#a855f7','#eab308','#22c55e','#64748b','#0ea5e9','#d946ef','#f43f5e'];

function makeDoughnut(ctx, data, label) {
    const labels = data.map(d => d[0]);
    const values = data.map(d => d[1]);
    return new Chart(ctx, {
        type: 'doughnut',
        data: {
            labels: labels,
            datasets: [{
                data: values,
                backgroundColor: COLORS.slice(0, labels.length),
                borderWidth: 1,
                borderColor: '#1e293b'
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
                legend: { position: 'right', labels: { color: '#cbd5e1', font: { size: 11 } } },
                tooltip: {
                    callbacks: {
                        label: (ctx) => {
                            const total = ctx.dataset.data.reduce((a,b)=>a+b, 0);
                            const pct = total ? (ctx.parsed/total*100).toFixed(1) : 0;
                            return ` ${ctx.label}: ${ctx.parsed} (${pct}%)`;
                        }
                    }
                }
            }
        }
    });
}

function makeBar(ctx, data, label) {
    const labels = data.map(d => d[0]);
    const values = data.map(d => d[1]);
    return new Chart(ctx, {
        type: 'bar',
        data: {
            labels: labels,
            datasets: [{
                label: label,
                data: values,
                backgroundColor: '#3b82f6',
                borderColor: '#1e40af',
                borderWidth: 1
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            indexAxis: 'y',
            plugins: { legend: { display: false }, tooltip: { enabled: true } },
            scales: {
                x: { ticks: { color: '#94a3b8' }, grid: { color: '#1e293b' } },
                y: { ticks: { color: '#cbd5e1', font: { size: 11 } }, grid: { display: false } }
            }
        }
    });
}

window.addEventListener('DOMContentLoaded', () => {
    // hourly chart - dual axis (requests + bytes)
    const hCtx = document.getElementById('hourlyChart').getContext('2d');
    new Chart(hCtx, {
        type: 'line',
        data: {
            labels: HOURLY.map(h => String(h.hour).padStart(2,'0') + ':00'),
            datasets: [
                {
                    label: '请求数',
                    data: HOURLY.map(h => h.requests),
                    borderColor: '#3b82f6',
                    backgroundColor: 'rgba(59,130,246,0.1)',
                    fill: true,
                    yAxisID: 'y',
                    tension: 0.3
                },
                {
                    label: '流量 (MB)',
                    data: HOURLY.map(h => h.bytes / (1024*1024)),
                    borderColor: '#10b981',
                    backgroundColor: 'rgba(16,185,129,0.1)',
                    fill: true,
                    yAxisID: 'y1',
                    tension: 0.3
                }
            ]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            interaction: { mode: 'index', intersect: false },
            plugins: { legend: { labels: { color: '#cbd5e1' } } },
            scales: {
                x: { ticks: { color: '#94a3b8' }, grid: { color: '#1e293b' } },
                y: { type: 'linear', position: 'left', ticks: { color: '#3b82f6' }, grid: { color: '#1e293b' }, title: { display: true, text: '请求数', color: '#3b82f6' } },
                y1: { type: 'linear', position: 'right', ticks: { color: '#10b981' }, grid: { display: false }, title: { display: true, text: '流量 MB', color: '#10b981' } }
            }
        }
    });

    if (BY_RESULT.length) makeDoughnut(document.getElementById('resultChart').getContext('2d'), BY_RESULT, '结果码');
    if (BY_HTTP.length) makeBar(document.getElementById('httpChart').getContext('2d'), BY_HTTP, 'HTTP状态');
    if (BY_METHOD.length) makeDoughnut(document.getElementById('methodChart').getContext('2d'), BY_METHOD, '方法');
    if (BY_CATEGORY.length) makeDoughnut(document.getElementById('categoryChart').getContext('2d'), BY_CATEGORY, '分类');
});

function refreshLogs() {
    fetch('{{ url_for("api_logs_refresh") }}', { method: 'POST' })
        .then(r => r.json())
        .then(d => {
            if (d.ok) location.reload();
            else alert('刷新失败: ' + (d.message || ''));
        });
}
</script>
{% endblock %}