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app/api/counters/[id]/history/route.ts

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+import { NextResponse } from 'next/server';
+import db from '@/lib/db';
+
+export const dynamic = 'force-dynamic';
+
+type Params = { params: Promise<{ id: string }> };
+
+export async function GET(_req: Request, { params }: Params) {
+  const { id } = await params;
+  const counter = db.prepare('SELECT * FROM counters WHERE id = ?').get(Number(id));
+  if (!counter) return NextResponse.json({ error: 'Not found' }, { status: 404 });
+
+  const cutoff = Date.now() - 365 * 24 * 60 * 60 * 1000;
+
+  const dailyActivity = db.prepare(`
+    SELECT
+      date(created_at / 1000, 'unixepoch', 'localtime') AS date,
+      SUM(delta) AS value
+    FROM events
+    WHERE counter_id = ? AND created_at >= ?
+    GROUP BY date
+    HAVING SUM(delta) > 0
+    ORDER BY date ASC
+  `).all(Number(id), cutoff);
+
+  const allTimeTotal = (db.prepare(
+    'SELECT COALESCE(SUM(delta), 0) AS total FROM events WHERE counter_id = ?'
+  ).get(Number(id)) as { total: number }).total;
+
+  return NextResponse.json({ counter, dailyActivity, allTimeTotal });
+}