fix: logic to show BSR improvements (rank drops) in green

debug_timestamps.ts

@@ -0,0 +1,70 @@
+import XLSX from 'xlsx';
+import { readFileSync } from 'fs';
+import { processAdsExcel, mergeSalesAndAdsData } from './services/dataProcessor';
+import { computeDiD } from './services/experimentAnalysis';
+import { getExperimentAsins } from './services/experiments';
+import { Experiment, CombinedKPIs } from './types';
+
+// Simulate the getWeekStartSunday function from experimentAnalysis.ts
+function getWeekStartSunday(year: number, week: number): number {
+    const jan1 = new Date(year, 0, 1);
+    const day = jan1.getDay();
+    const startYear = new Date(year, 0, 1 - day);
+    return startYear.getTime() + (week - 1) * 7 * 86400000;
+}
+
+async function run() {
+    const buf = readFileSync('/tmp/Ads-Weekly.xlsx').buffer;
+    const adsData = await processAdsExcel(buf);
+
+    const merged = mergeSalesAndAdsData([], adsData);
+
+    // Show the timestamps for INKEE DE weeks 
+    const inkeeDE = merged.filter(m =>
+        m.asin.startsWith('B0CQ') &&
+        (m.marketplace || m.customer || '').includes('DE')
+    );
+
+    console.log('=== INKEE DE TIMESTAMP ANALYSIS ===');
+    for (const r of inkeeDE.slice(0, 5)) {
+        const weekStartTs = getWeekStartSunday(r.year, r.week);
+        const weekStartDate = new Date(weekStartTs).toISOString().split('T')[0];
+        console.log(`ASIN:${r.asin} ${r.year}-W${r.week} weekStart:${weekStartDate} cost:${r.cost.toFixed(2)}`);
+    }
+
+    console.log('\n=== WEEK DATE RANGES ===');
+    for (let week = 1; week <= 8; week++) {
+        const ts2025 = getWeekStartSunday(2025, week);
+        const ts2026 = getWeekStartSunday(2026, week);
+        const d2025 = new Date(ts2025).toISOString().split('T')[0];
+        const d2026 = new Date(ts2026).toISOString().split('T')[0];
+        console.log(`Week ${week}: 2025 → ${d2025} | 2026 → ${d2026}`);
+    }
+
+    // Now simulate an experiment that spans the existing data range
+    // The experiment "INKEE DE" - let's test with dates in Jan 2026 (W1-W4)
+    const testExperiment: Experiment = {
+        id: 'test',
+        name: 'INKEE DE Test',
+        type: 'advertising',
+        status: 'active',
+        asins: ['B0CQ247T2V', 'B0CQTLZRCV'],
+        control_asins: [],
+        marketplace: 'DE',
+        start_date: '2026-01-05',  // Start of week 2, 2026
+        end_date: '2026-02-22',    // End of week 8, 2026
+        baseline_start_date: '2025-01-06', // Week 2, 2025
+        baseline_end_date: '2025-02-23',   // Week 8, 2025
+        primary_metric: 'acos',
+        notes: '',
+        owner: ''
+    };
+
+    console.log('\n=== DiD SIMULATION ===');
+    const did = computeDiD(testExperiment, merged as CombinedKPIs[]);
+    console.log('ACOS:', did.metrics['acos']);
+    console.log('ROAS:', did.metrics['roas']);
+    console.log('Units:', did.metrics['units']);
+}
+
+run().catch(console.error);