feat: enable custom baseline periods for Experiments to solve seasonality

test-csv.js

@@ -0,0 +1,66 @@
+import fs from 'fs';
+import https from 'https';
+
+const url = "https://www.dropbox.com/scl/fi/b9zxn4z5i7sxwfakk5g5y/Amazon-Sell-Out-2023-2025.csv?rlkey=uoto6v0mm99py8nszy8ldtez8&dl=1";
+
+https.get(url, (res) => {
+  if (res.statusCode >= 300 && res.statusCode < 400 && res.headers.location) {
+    https.get(res.headers.location, (res2) => {
+      processData(res2);
+    });
+  } else {
+    processData(res);
+  }
+}).on('error', (e) => {
+  console.error(e);
+});
+
+function processData(stream) {
+  let data = '';
+  stream.on('data', chunk => {
+    data += chunk.toString('utf8');
+  });
+  stream.on('end', () => {
+    analyze(data);
+  });
+}
+
+function analyze(data) {
+  const lines = data.split('\n');
+  console.log("Total Lines in CSV:", lines.length);
+
+  let maxYear = 0;
+  let maxWeek = 0;
+  let minYear = 2030;
+  let minWeek = 52;
+  let legendsRows = 0;
+  let legendsMaxYear = 0;
+  let legendsMaxWeek = 0;
+
+  for (let i = 1; i < lines.length; i++) {
+    const row = lines[i].split(',');
+    if (row.length < 5) continue;
+    const year = parseInt(row[3]); // Based on app processor logic it's mostly col 3 or 1
+    const week = parseInt(row[4]); // Based on app processor
+
+    // Use regex fallback if parsing fails
+    const matchedYear = parseInt(row.find(r => r.startsWith('202')) || '0');
+    const matchedWeek = parseInt(row.find(r => r.match(/^[0-9]{1,2}$/)) || '0');
+
+    const y = year || matchedYear || 0;
+    const w = week || matchedWeek || 0;
+
+    if (y > maxYear) { maxYear = y; maxWeek = w; }
+    else if (y === maxYear && w > maxWeek) { maxWeek = w; }
+
+    if (y < minYear && y > 2000) { minYear = y; minWeek = w; }
+
+    if (lines[i].toLowerCase().includes('legends')) {
+      legendsRows++;
+      if (y > legendsMaxYear) { legendsMaxYear = y; legendsMaxWeek = w; }
+      else if (y === legendsMaxYear && w > legendsMaxWeek) { legendsMaxWeek = w; }
+    }
+  }
+  console.log(`Global -> Min Date: Year ${minYear}, Week ${minWeek} | Max Date: Year ${maxYear}, Week ${maxWeek}`);
+  console.log(`LEGENDS stats -> Total rows: ${legendsRows}, Max Date: Year ${legendsMaxYear}, Week ${legendsMaxWeek}`);
+}