#!/usr/bin/env bash

source /dev/stdin <<< "$(curl -sL http://scity.xyz/colorsinc)"

# Detect distribution name
if [[ `which lsb_release 2>/dev/null` ]]; then
    # lsb_release available
    distrib_name=`lsb_release -is`
else
    # lsb_release not available
    lsb_files=`find /etc -type f -maxdepth 1 \( ! -wholename /etc/os-release ! -wholename /etc/lsb-release -wholename /etc/\*release -o -wholename /etc/\*version \) 2> /dev/null`
    for file in $lsb_files; do
        if [[ $file =~ /etc/(.*)[-_] ]]; then
            distrib_name=${BASH_REMATCH[1]}
            break
        else
            echo -e "${BOrange}Sorry, GlancesAutoInstall script is not compliant with your system.${Color_Off}"
            echo -e "${BOrange}Please read: https://github.com/nicolargo/glances#installation${Color_Off}"
            exit 1
        fi
    done
fi

echo -e "${CS[color,LightGreen]}Detected system: $distrib_name${CS[color,Default]}"

echo ""

# if we have ignition, print and exit
gotDist () {
   [ -n "$1" ] && echo "$1" && exit 0
}

# we are only interested in a single word "dist" here
# various malformations can occur; admin will have to code appropately based on output
linuxRelease () {
   if [ -r /etc/lsb-release ]; then
      dist=$(grep 'DISTRIB_ID' /etc/lsb-release | sed 's/DISTRIB_ID=//' | head -1)
      gotDist "$dist"
   fi

   dist=$(find /etc/ -maxdepth 1 -name '*release' 2> /dev/null | sed 's/\/etc\///' | sed 's/-release//' | head -1)
   if [ "$dist" = "os" ]; then
	   dist=$(find /etc/ -maxdepth 1 -name '*release' 2> /dev/null | sed 's/\/etc\///' | sed 's/-release//' | head -2 | tail -1)
   fi
   gotDist "$dist"

   dist=$(find /etc/ -maxdepth 1 -name '*version' 2> /dev/null | sed 's/\/etc\///' | sed 's/-version//' | head -1)
   gotDist "$dist"

   return 1
}

# start with uname and branch the decision from there
dist=$(uname -s 2> /dev/null)
if [ "$dist" = "Linux" ]; then
   linuxRelease
elif [ -n "$dist" ]; then
   echo "$dist"
else
   echo "Couldn't find system"
   exit 1
fi

exit 0