/**
 * View Component: Header
 * Top app bar with logo, title, and key stats.
 *
 * Props:
 *   stats: { total, visible, favorites, books, withCover, dateRange }
 */

function Header({ stats }) {
  return (
    <header className="app-header">
      <div className="header-left">
        <div className="logo-mark">选</div>
        <div>
          <div className="header-title">内容选材看板</div>
          <div className="header-subtitle">小红书 · {stats.total} 个选题 · 更新于 {stats.lastUpdated || '—'}</div>
        </div>
      </div>
      <div className="header-right">
        <div className="header-stat">
          <span className="header-stat-value">{stats.total}</span>
          <span className="header-stat-label">篇选题</span>
        </div>
        <div className="header-divider"></div>
        <div className="header-stat">
          <span className="header-stat-value" style={{ color: 'var(--accent)' }}>
            {stats.withCover}
          </span>
          <span className="header-stat-label">有封面</span>
        </div>
        <div className="header-divider"></div>
        <div className="header-stat">
          <span className="header-stat-value" style={{ color: 'var(--text-primary)' }}>
            {stats.books}
          </span>
          <span className="header-stat-label">本书籍</span>
        </div>
        <div className="header-divider"></div>
        <div className="header-stat">
          <span className="header-stat-value" style={{ color: 'var(--text-primary)' }}>
            {stats.hotspots}
          </span>
          <span className="header-stat-label">个热点</span>
        </div>
        <div className="header-divider"></div>
        <div className="header-stat">
          <span className="header-stat-value" style={{ color: 'var(--text-primary)' }}>
            {stats.visible}
          </span>
          <span className="header-stat-label">当前显示</span>
        </div>
        <div className="header-divider"></div>
        <div className="fav-count-pill">
          <svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor" stroke="none">
            <path d="M12 21.35l-1.45-1.32C5.4 15.36 2 12.28 2 8.5 2 5.42 4.42 3 7.5 3c1.74 0 3.41.81 4.5 2.09C13.09 3.81 14.76 3 16.5 3 19.58 3 22 5.42 22 8.5c0 3.78-3.4 6.86-8.55 11.54L12 21.35z"/>
          </svg>
          已选 {stats.favorites}
        </div>
      </div>
    </header>
  );
}

window.Header = Header;