From 5c36c781a6cdc365a310dbba509d35373999b8af Mon Sep 17 00:00:00 2001
From: karthik <gopavarapukarthik08@gmail.com>
Date: Tue, 29 Jul 2025 00:09:43 +0530
Subject: [PATCH] fix : TAN without box is working , box is having issue

---
 .../selection.service/selection.service.ts    | 29 +++++++++++++++++--
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/btc-UI/src/app/components/selection.service/selection.service.ts b/btc-UI/src/app/components/selection.service/selection.service.ts
index dc0cdce..efc7161 100644
--- a/btc-UI/src/app/components/selection.service/selection.service.ts
+++ b/btc-UI/src/app/components/selection.service/selection.service.ts
@@ -98,7 +98,7 @@ export class SelectionService {
           }
 
           updated.numbers = [...group1, '-', ...group2];
-          updated.total = combinations * value * 10; // Value multiplier as per your code (10x)
+          updated.total = combinations * value * 10;
           break;
         }
 
@@ -113,9 +113,23 @@ export class SelectionService {
           const group2 = updated.numbers.slice(dashIndices[0] + 1, dashIndices[1]).filter(n => typeof n === 'number') as number[];
           const group3 = updated.numbers.slice(dashIndices[1] + 1).filter(n => typeof n === 'number') as number[];
 
-          let combinations = group1.length * group2.length * group3.length;
+          let combinations = 0;
+
           if (isBoxed) {
-            combinations = this.calculatePermutations(group1.length + group2.length + group3.length);
+            // Boxed: all unique numbers, nP3
+            const allNums = Array.from(new Set([...group1, ...group2, ...group3]));
+            combinations = allNums.length >= 3 ? this.calculatePermutationsN(allNums.length, 3) : 0;
+          } else {
+            // Unboxed: only combinations where all chosen numbers are different
+            for (const a of group1) {
+              for (const b of group2) {
+                if (b === a) continue;
+                for (const c of group3) {
+                  if (c === a || c === b) continue;
+                  combinations++;
+                }
+              }
+            }
           }
 
           updated.total = combinations * value * 10;
@@ -171,6 +185,15 @@ export class SelectionService {
     return n >= 2 ? n * (n - 1) : 0;
   }
 
+  private calculatePermutationsN(n: number, r: number): number {
+    if (n < r) return 0;
+    let result = 1;
+    for (let i = 0; i < r; i++) {
+      result *= (n - i);
+    }
+    return result;
+  }
+
   private splitToLegs(numbers: (number | string)[], legCount: number): number[][] {
     const result: number[][] = [];
     let currentLeg: number[] = [];