Add activity level-based daily calorie needs calculation

- Prompt for user input for activity level (Sedentary, Light, Moderate, Active, Very Active, Extra Active).
- Calculate daily calorie needs using BMR and activity level multiplier.
- Compute recommended macronutrient calorie intake (protein, carbohydrates, fat).
- Output BMR, daily calorie needs, and macronutrient breakdown.

Nutrition/splits.ps1

@@ -3,29 +3,57 @@ $Weight = Read-Host "Please input weight in kg"
 $Height = Read-Host "Please input height in cm"
 $Age = Read-Host "Please input age in years"
 $Gender = Read-Host "Are you Male (M) or Female (F)? (M/F)"
+$ActivityLevel = Read-Host "Please input your activity level (Sedentary, Light, Moderate, Active, Very Active, Extra Active)"
 
 # Convert height to meters for calculation (assuming input is in cm)
 $HeightMeters = [decimal]$Height / 100
 
-# Determine BMR and macronutrient splits based on gender
+# Determine BMR based on gender
 if ($Gender -eq "F" -or $Gender -eq "f") {
-    $Calories = 655.1 + (9.563 * [decimal]$Weight) + (1.850 * [decimal]$Height) - (4.676 * [decimal]$Age)
+    $BMR = 655.1 + (9.563 * [decimal]$Weight) + (1.850 * [decimal]$Height) - (4.676 * [decimal]$Age)
 }
 elseif ($Gender -eq "M" -or $Gender -eq "m") {
-    $Calories = 66.47 + (13.75 * [decimal]$Weight) + (5.003 * [decimal]$Height) - (6.755 * [decimal]$Age)
+    $BMR = 66.47 + (13.75 * [decimal]$Weight) + (5.003 * [decimal]$Height) - (6.755 * [decimal]$Age)
 }
 else {
     Write-Host "Invalid input for gender. Exiting."
     Exit
 }
 
+# Calculate daily calorie needs based on activity level
+switch ($ActivityLevel) {
+    "Sedentary" {
+        $CalorieNeeds = $BMR * 1.2
+    }
+    "Light" {
+        $CalorieNeeds = $BMR * 1.375
+    }
+    "Moderate" {
+        $CalorieNeeds = $BMR * 1.55
+    }
+    "Active" {
+        $CalorieNeeds = $BMR * 1.725
+    }
+    "Very Active" {
+        $CalorieNeeds = $BMR * 1.9
+    }
+    "Extra Active" {
+        $CalorieNeeds = $BMR * 2.2
+    }
+    default {
+        Write-Host "Invalid input for activity level. Exiting."
+        Exit
+    }
+}
+
 # Calculate macronutrient calories
-$Protein_Cals = ($Calories / 10) * 2
+$Protein_Cals = ($CalorieNeeds / 10) * 2
-$Carbs_Cals = ($Calories / 10) * 6
+$Carbs_Cals = ($CalorieNeeds / 10) * 6
-$Fat_Cals = ($Calories / 10) * 2
+$Fat_Cals = ($CalorieNeeds / 10) * 2
 
 # Display results
-Write-Host "Your BMR is:" ([math]::Round($Calories, 0)) "kcals"
+Write-Host "Your BMR is:" ([math]::Round($BMR, 0)) "kcals"
+Write-Host "Your daily calorie needs based on your activity level are:" ([math]::Round($CalorieNeeds, 0)) "kcals"
 Write-Host "Your recommended protein intake is:" ([math]::Round($Protein_Cals, 0)) "kcals"
 Write-Host "Your recommended carbohydrate intake is:" ([math]::Round($Carbs_Cals, 0)) "kcals"
 Write-Host "Your recommended fat intake is:" ([Math]::Round($Fat_Cals, 0)) "kcals"