{% extends "base.html" %} {% block title %}{{ page_title }} — HF Daily Papers{%
endblock %} {% block content %}
<section class="trends-page">
  <h1>趋势看板</h1>

  <div class="charts-grid">
    {# 按日论文数量折线图 #}
    <div class="chart-card">
      <h2>📅 每日论文数量（近 30 天）</h2>
      <canvas id="dailyChart"></canvas>
    </div>

    {# 热门标签 Top 20 #}
    <div class="chart-card">
      <h2>🏷️ 热门标签 Top 20</h2>
      <canvas id="tagsChart"></canvas>
    </div>

    {# Upvotes 分布 #}
    <div class="chart-card">
      <h2>👍 Upvotes 分布</h2>
      <canvas id="upvotesChart"></canvas>
    </div>

    {# 总结完成率 #}
    <div class="chart-card">
      <h2>📝 总结完成率</h2>
      <canvas id="summaryChart"></canvas>
    </div>
  </div>
</section>
{% endblock %} {% block scripts %}
<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.7/dist/chart.umd.min.js"></script>
<script>
  // 颜色配置（Kami ink-blue 暖调色系）
  const COLORS = {
    primary: '#1B365D',
    primaryLight: 'rgba(27, 54, 93, 0.12)',
    accent: '#2a4d7a',
    success: '#3d6e3d',
    warning: '#7a6430',
    danger: '#8c2828',
    muted: '#6b6a64',
    palette: [
      '#1B365D', '#2a4d7a', '#3d6e3d', '#7a6430', '#8c2828',
      '#4a4070', '#2d6b6e', '#8a5a2a', '#504e49', '#5c6030',
      '#2b4a80', '#70304a', '#2d5e56', '#7a4a10', '#353a60',
      '#6a6a28', '#552a5a', '#2d6b6e', '#4a3828', '#3d4450',
    ],
  };

  const statsData = {{ stats | tojson }};

  // 每日论文数量折线图
  (function() {
    const ctx = document.getElementById('dailyChart').getContext('2d');
    const labels = statsData.daily_counts.map(d => d.date);
    const data = statsData.daily_counts.map(d => d.count);
    new Chart(ctx, {
      type: 'line',
      data: {
        labels: labels,
        datasets: [{
          label: '论文数',
          data: data,
          borderColor: COLORS.primary,
          backgroundColor: COLORS.primaryLight,
          fill: true,
          tension: 0.3,
          pointRadius: 3,
          pointHoverRadius: 6,
        }]
      },
      options: {
        responsive: true,
        plugins: { legend: { display: false } },
        scales: {
          x: { ticks: { maxTicksLimit: 10, font: { size: 11 } } },
          y: { beginAtZero: true, ticks: { stepSize: 1 } },
        }
      }
    });
  })();

  // 热门标签柱状图
  (function() {
    const ctx = document.getElementById('tagsChart').getContext('2d');
    const labels = statsData.top_tags.map(d => d.tag);
    const data = statsData.top_tags.map(d => d.count);
    new Chart(ctx, {
      type: 'bar',
      data: {
        labels: labels,
        datasets: [{
          label: '论文数',
          data: data,
          backgroundColor: COLORS.palette.slice(0, data.length),
          borderRadius: 4,
        }]
      },
      options: {
        responsive: true,
        indexAxis: 'y',
        plugins: { legend: { display: false } },
        scales: {
          x: { beginAtZero: true, ticks: { stepSize: 1 } },
        }
      }
    });
  })();

  // Upvotes 分布
  (function() {
    const ctx = document.getElementById('upvotesChart').getContext('2d');
    const labels = statsData.upvotes_dist.map(d => d.range);
    const data = statsData.upvotes_dist.map(d => d.count);
    new Chart(ctx, {
      type: 'bar',
      data: {
        labels: labels,
        datasets: [{
          label: '论文数',
          data: data,
          backgroundColor: COLORS.accent,
          borderRadius: 4,
        }]
      },
      options: {
        responsive: true,
        plugins: { legend: { display: false } },
        scales: {
          y: { beginAtZero: true, ticks: { stepSize: 1 } },
        }
      }
    });
  })();

  // 总结完成率环形图
  (function() {
    const ctx = document.getElementById('summaryChart').getContext('2d');
    const statusLabels = {
      'done': '已完成',
      'pending': '待总结',
      'processing': '总结中',
      'failed': '失败',
      'permanent_failure': '永久失败',
      'none': '未开始',
    };
    const statusColors = {
      'done': COLORS.success,
      'pending': COLORS.warning,
      'processing': COLORS.primary,
      'failed': COLORS.danger,
      'permanent_failure': '#b71c1c',
      'none': '#bdbdbd',
    };
    const labels = statsData.summary_completion.map(d => statusLabels[d.status] || d.status);
    const data = statsData.summary_completion.map(d => d.count);
    const colors = statsData.summary_completion.map(d => statusColors[d.status] || COLORS.muted);
    new Chart(ctx, {
      type: 'doughnut',
      data: {
        labels: labels,
        datasets: [{
          data: data,
          backgroundColor: colors,
          borderWidth: 2,
          borderColor: '#fff',
        }]
      },
      options: {
        responsive: true,
        plugins: {
          legend: { position: 'bottom', labels: { padding: 12 } },
        }
      }
    });
  })();
</script>
{% endblock %}