#!/usr/bin/env sh

# Detects what OS you are running and outputs a short string to identify that OS.
# Also saves the result in the $DISTRO environment variable.
# -v for more verbose output

source ./colors
source ./say

# Read arguments
while getopts v flag
do
    case "${flag}" in
        v) VERBOSE=true
        ;;
    esac
done

# Output welcome message
if [ $VERBOSE ]; then say "Detecting which Linux distribution or other operating system you are using..."; fi
 
# Check for each known operating system one-by-one
if [ -f "/etc/debian_version" ]; then
	DISTRO="debian"
	if [ $VERBOSE ]; then say "${GREEN}Debian${RESET}, Ubuntu, or Raspbian OS detected."; fi 
elif [ -f "/etc/arch-release" ]; then
	DISTRO="arch"
	if [ $VERBOSE ]; then say "${GREEN}Arch or Manjaro-based${RESET} OS detected."; fi
elif [ -f "/etc/fedora-release" ]; then
	DISTRO="fedora"
	if [ $VERBOSE ]; then say "${GREEN}Fedora${RESET} detected as the Operating System"; fi
elif [ $(uname | grep -c "Darwin") -eq 1 ]; then
	DISTRO="mac"
	if [ $VERBOSE ]; then say "${GREEN}MacOS${RESET} detected."; fi
else
	# Failed to detect OS, so complain and exit
	say unknown
	exit 1
fi
	
# Output the short string for the detected OS
if [ ! $VERBOSE ]; then
	say $DISTRO;
fi