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

@@ -1,33 +1,59 @@
-#VARS
-[decimal]$Weight = Read-Host "Please input weight in kg"
-[decimal]$Height = Read-Host "Please input height in cm"
-[decimal]$Age = Read-Host "Please input age in years"
-[char]$Gender = Read-Host "Are you Male (M) or Female (F)".ToUpper()
+# Prompt for user inputs
+$Weight = Read-Host "Please input weight in kg"
+$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)"
 
-#determining split (female)
-if ($Gender = "F") {
-    $Calories = 655.1 + (9.563 * $weight) + (1.850 + $Height) - (4.676 * $Age)
+# Convert height to meters for calculation (assuming input is in cm)
+$HeightMeters = [decimal]$Height / 100
 
-    $Protein_Cals = ($Calories/10)*2
-    $Carbs_Cals = ($Calories/10)*6
-    $Fat_Cals = ($Calories/10)*2
-    Write-Host "Your BMR is:"([math]::Round($Calories,0))
-    Write-Host "Your recommended protein intake is:" ([math]::Round($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"
+# Determine BMR based on gender
+if ($Gender -eq "F" -or $Gender -eq "f") {
+    $BMR = 655.1 + (9.563 * [decimal]$Weight) + (1.850 * [decimal]$Height) - (4.676 * [decimal]$Age)
 }
-#determing split (male)
-elseif ($Gender = "M") {
-    $Calories = 66.47 + (13.75 * $weight) + (5.003 + $Height) - (6.755 * $Age)
-    $Protein = $Calories/4
-    $Carbs = $Calories/4
-    $Fats = $Calories/9
-    Write-Host "Your BMR is: " $Calories
-    Write-Host "Your recommended protein intake is: " $Protein
-    Write-Host "Your recommended carbohydrate intake is: " $Carbs
-    Write-Host "Your recommended fat intake is: " $Fats
+elseif ($Gender -eq "M" -or $Gender -eq "m") {
+    $BMR = 66.47 + (13.75 * [decimal]$Weight) + (5.003 * [decimal]$Height) - (6.755 * [decimal]$Age)
 }
 else {
-    Exit-PSSession
+    Write-Host "Invalid input for gender. Exiting."
+    Exit
 }
-Exit-PSSession
+
+# 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 = ($CalorieNeeds / 10) * 2
+$Carbs_Cals = ($CalorieNeeds / 10) * 6
+$Fat_Cals = ($CalorieNeeds / 10) * 2
+
+# Display results
+Write-Host "Your BMR is:" ([math]::Round($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"