flogg

# checks the complexity of a file in HEAD

filepath=$1

function calculate_complexity_difference() {
    previous_complexity=$(git show HEAD:$filepath | flog | grep 'flog total' | awk '{print $1}' | sed 's/\://g')
    current_complexity=$(flog $filepath | grep 'flog total' | awk '{print $1}' | sed 's/\://g')
    difference=$(echo $previous_complexity - $current_complexity | bc)
}

function print_complexity_diff() {
  calculate_complexity_difference
  echo "Previous Complexity: $previous_complexity"
  echo -e "Current Complexity: $current_complexity\n"
  echo "You have reduced the total complexity by: $difference"
}

function invalid_filepath() {
    [[ ! -f $filepath ]]
}

function missing_params() {
    [[ -z $filepath ]]
}

function print_invalid_filepath_message() {
    echo "File not found: $filepath"
    exit 1
}

function print_usage_message() {
    echo 'Usage: flogg <filepath>'
    exit 1
}

function main() {
    if missing_params; then
        print_usage_message
    elif invalid_filepath; then
        print_invalid_filepath_message
    fi

    print_complexity_diff
}

main