#!/usr/bin/env bash

# ----------------------
# sf -- script framework
# ----------------------

# Declare sf variables
sfdesc="Calculate the sum of multiple numbers."

sfargs+=("NUMBERS;Numbers which will be added")
sfargs+=("verbose;v;Enable verbose output")

sfparr=true  # Treat the last declared positional argument as array

# Include sf, this could be replaced with a long oneliner
source "$(dirname $0)/../sf"

# ----------------------
# Actual script
# ----------------------

sum=0

for n in "${NUMBERS[@]}"; do         # Use parsed positional argument array
    if [ "$verbose" == true ]; then  # Use parsed flag
        echo -n "$sum + $n = "
    fi
    sum="$(expr $sum + $n)"
    if [ "$verbose" == true ]; then  # Use parsed flag
        echo "$sftbf$sum$sftrs"      # Use text formatting variables
    fi
done

echo "The sum is: $sftbf$sum$sftrs"  # Use text formatting variables