# 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)"

# Convert height to meters for calculation (assuming input is in cm)
$HeightMeters = [decimal]$Height / 100

# Determine BMR and macronutrient splits 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)
}
elseif ($Gender -eq "M" -or $Gender -eq "m") {
    $Calories = 66.47 + (13.75 * [decimal]$Weight) + (5.003 * [decimal]$Height) - (6.755 * [decimal]$Age)
}
else {
    Write-Host "Invalid input for gender. Exiting."
    Exit
}

# Calculate macronutrient calories
$Protein_Cals = ($Calories / 10) * 2
$Carbs_Cals = ($Calories / 10) * 6
$Fat_Cals = ($Calories / 10) * 2

# Display results
Write-Host "Your BMR is:" ([math]::Round($Calories, 0)) "kcals"
Write-Host "Your recommended protein intake is:" ([math]::Round($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"