#!/bin/bash
#
usage="Usage: $0 [-n | no details] [-r | repeat]"
while getopts "hnrs" options; do
  case $options in
    n ) NO_DETAILS="True";;
    r ) REPEAT="True";;
    s ) SHORT="True";;
    h ) echo $usage
        exit 0
        ;;
   \? ) echo $usage
        exit 1
        ;;
  esac
done

if [[ $REPEAT == "True" ]]; then
    watch -n 1 -c "clear && $0 -s"
else
    COLOR_WHITE="\033[00m"
    COLOR_CYAN="\033[1;36m"
    COLOR_RED="\033[1;31m"
    COLOR_YELLOW="\033[1;33m"
    COLOR_DARKYELLOW="\033[0;33m"
    COLOR_GREEN="\033[1;32m"
    COLOR_DARKGREEN="\033[0;32m"
    COLOR_OCHRE="\033[38;5;95m"
    #
    git_status="$(LANGUAGE='en_US.UTF-8 git' git status 2> /dev/null)"
    git_diff="$(git  status --porcelain 2> /dev/null)"
    #
    if [ -z "$git_status" ]; then
      # No GIT repository
      exit
    fi
    if [[ $SHORT ]]; then
      if [[ ! $git_status =~ "working tree clean" ]] && [[ ! $git_status =~ "working directory clean" ]]; then
        git_status_color="$COLOR_RED"
        git_status_text="local changes"
      elif [[ $git_status =~ "Your branch is behind" ]]; then
        git_status_color="$COLOR_YELLOW"
        git_status_text="pull required"
      elif [[ $git_status =~ "Your branch is ahead of" ]]; then
        git_status_color="$COLOR_YELLOW"
        git_status_text="push required"
      elif [[ $git_status =~ "nothing to commit" ]]; then
        git_status_color="$COLOR_DARKGREEN"
        git_status_text="clean        "
      else
        git_status_color="$COLOR_OCHRE"
        git_status_text="unknown      "
      fi
      echo -ne "$git_status_color$git_status_text$COLOR_WHITE"
    else
      if [[ ! $git_status = "" ]]; then
      git_branch="$(git branch 2> /dev/null | sed --quiet 's/* \(.*\)/\1/p')"
      git_url="$(git config --get remote.origin.url 2> /dev/null)"
      if [[ ! $git_status =~ "working tree clean" ]] && [[ ! $git_status =~ "working directory clean" ]]; then
        git_status_color="$COLOR_RED"
        git_status_text="╡ local changes ╞"
      elif [[ $git_status =~ "Your branch is behind" ]]; then
        git_status_color="$COLOR_YELLOW"
        git_status_text="╡ pull required ╞"
      elif [[ $git_status =~ "Your branch is ahead of" ]]; then
        git_status_color="$COLOR_YELLOW"
        git_status_text="╡ push required ╞"
      elif [[ $git_status =~ "nothing to commit" ]]; then
        git_status_color="$COLOR_DARKGREEN"
        git_status_text="╡ clean ╞════════"
      else
        git_status_color="$COLOR_OCHRE"
        git_status_text="╡ unknown ╞══════"
      fi
    fi

    echo -e "$git_status_color╔═══$git_status_text════════════════════════════════════════════════════════════════"
    echo -e "$git_status_color║ $COLOR_GREEN($git_branch)  $COLOR_CYAN$git_url"

    if [[ ! $git_diff == "" && $NO_DETAILS != "True" ]]; then
      echo -e "$git_status_color╠════════════════════════════════════════════════════════════════════════════════════"
      IFS=$'\n'
      for ENTRY in $git_diff; do 
        if [[ $ENTRY = "D "* ]] || [[ $ENTRY = "A "* ]] || [[ $ENTRY = "M "* ]] || [[ $ENTRY = "R "* ]]; then
          echo -e "$git_status_color║ $COLOR_DARKYELLOW$ENTRY"
        else
          echo -e "$git_status_color║ $COLOR_YELLOW$ENTRY"
        fi
      done
    fi
    echo -e "$git_status_color╚════════════════════════════════════════════════════════════════════════════════════$COLOR_WHITE\n \b"
    fi
fi