feat: cleaned blitz

src/core/blitz/calculateWN8.ts

@@ -0,0 +1,45 @@
+import { AllStats } from '../../types/accountInfo.js';
+
+/**
+ * Formula from https://web.archive.org/web/20190105064817/http://wiki.wnefficiency.net/pages/WN8
+ */
+export default function calculateWN8(expected: AllStats, average: AllStats) {
+  const avgDmg = average.damage_dealt / average.battles;
+  const avgSpot = average.spotted / average.battles;
+  const avgFrag = average.frags / average.battles;
+  const avgDef = average.dropped_capture_points / average.battles;
+  const avgWinRate = average.wins / average.battles;
+
+  const expDmg = expected.damage_dealt / expected.battles;
+  const expSpot = expected.spotted / expected.battles;
+  const expFrag = expected.frags / expected.battles;
+  const expDef = expected.dropped_capture_points / expected.battles;
+  const expWinRate = expected.wins / expected.battles;
+
+  const rDAMAGE = avgDmg / expDmg;
+  const rSPOT = avgSpot / expSpot;
+  const rFRAG = avgFrag / expFrag;
+  const rDEF = avgDef / expDef;
+  const rWIN = avgWinRate / expWinRate;
+
+  const rWINc = Math.max(0, (rWIN - 0.71) / (1 - 0.71));
+  const rDAMAGEc = Math.max(0, (rDAMAGE - 0.22) / (1 - 0.22));
+  const rFRAGc = Math.max(
+    0,
+    Math.min(rDAMAGEc + 0.2, (rFRAG - 0.12) / (1 - 0.12)),
+  );
+  const rSPOTc = Math.max(
+    0,
+    Math.min(rDAMAGEc + 0.1, (rSPOT - 0.38) / (1 - 0.38)),
+  );
+  const rDEFc = Math.max(0, Math.min(rDAMAGEc + 0.1, (rDEF - 0.1) / (1 - 0.1)));
+
+  const WN8 =
+    980 * rDAMAGEc +
+    210 * rDAMAGEc * rFRAGc +
+    155 * rFRAGc * rSPOTc +
+    75 * rDEFc * rFRAGc +
+    145 * Math.min(1.8, rWINc);
+
+  return WN8;
+}