fix

web/src/components/GachaStats.tsx

@@ -0,0 +1,144 @@
+import React, { useState, useEffect } from 'react';
+import { cardApi, aiCardApi } from '../services/api';
+import '../styles/GachaStats.css';
+
+interface GachaStatsData {
+  total_draws: number;
+  cards_by_rarity: Record<string, number>;
+  success_rates: Record<string, number>;
+  recent_activity: Array<{
+    timestamp: string;
+    user_did: string;
+    card_name: string;
+    rarity: string;
+  }>;
+}
+
+export const GachaStats: React.FC = () => {
+  const [stats, setStats] = useState<GachaStatsData | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const [useAI, setUseAI] = useState(true);
+
+  const loadStats = async () => {
+    setLoading(true);
+    setError(null);
+    
+    try {
+      let result;
+      if (useAI) {
+        try {
+          result = await aiCardApi.getEnhancedStats();
+        } catch (aiError) {
+          console.warn('AI統計が利用できません、基本統計に切り替えます:', aiError);
+          setUseAI(false);
+          result = await cardApi.getGachaStats();
+        }
+      } else {
+        result = await cardApi.getGachaStats();
+      }
+      setStats(result);
+    } catch (err) {
+      console.error('Gacha stats failed:', err);
+      setError('統計データの取得に失敗しました。ai.cardサーバーが起動していることを確認してください。');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  useEffect(() => {
+    loadStats();
+  }, []);
+
+  if (loading) {
+    return (
+      <div className="gacha-stats">
+        <div className="stats-loading">
+          <div className="loading-spinner"></div>
+          <p>統計データ取得中...</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div className="gacha-stats">
+        <div className="stats-error">
+          <p>{error}</p>
+          <button onClick={loadStats} className="retry-button">
+            再試行
+          </button>
+        </div>
+      </div>
+    );
+  }
+
+  if (!stats) {
+    return (
+      <div className="gacha-stats">
+        <div className="stats-empty">
+          <p>統計データがありません</p>
+          <button onClick={loadStats} className="load-stats-button">
+            統計取得
+          </button>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="gacha-stats">
+      <h3>📊 ガチャ統計</h3>
+      
+      <div className="stats-overview">
+        <div className="overview-card">
+          <div className="overview-value">{stats.total_draws}</div>
+          <div className="overview-label">総ガチャ実行数</div>
+        </div>
+      </div>
+
+      <div className="rarity-stats">
+        <h4>レアリティ別出現数</h4>
+        <div className="rarity-grid">
+          {Object.entries(stats.cards_by_rarity).map(([rarity, count]) => (
+            <div key={rarity} className={`rarity-stat rarity-${rarity.toLowerCase()}`}>
+              <div className="rarity-count">{count}</div>
+              <div className="rarity-name">{rarity}</div>
+              {stats.success_rates[rarity] && (
+                <div className="success-rate">
+                  {(stats.success_rates[rarity] * 100).toFixed(1)}%
+                </div>
+              )}
+            </div>
+          ))}
+        </div>
+      </div>
+
+      {stats.recent_activity && stats.recent_activity.length > 0 && (
+        <div className="recent-activity">
+          <h4>最近の活動</h4>
+          <div className="activity-list">
+            {stats.recent_activity.slice(0, 5).map((activity, index) => (
+              <div key={index} className="activity-item">
+                <div className="activity-time">
+                  {new Date(activity.timestamp).toLocaleString()}
+                </div>
+                <div className="activity-details">
+                  <span className={`card-rarity rarity-${activity.rarity.toLowerCase()}`}>
+                    {activity.rarity}
+                  </span>
+                  <span className="card-name">{activity.card_name}</span>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      <button onClick={loadStats} className="refresh-stats">
+        統計更新
+      </button>
+    </div>
+  );
+};