#!/bin/bash
#

#
# command line arguments
#
usage="Usage: $0 [-p | output for prompt]"
while getopts "hp" options; do
  case $options in
    p ) PROMPT="True";;
    h ) echo $usage
        exit 0
        ;;
   \? ) echo $usage
        exit 1
        ;;
  esac
done

#
# color definitions
#
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 information storage
#
git_status="$(LANGUAGE='en_US.UTF-8 git' git status 2> /dev/null)"
git_diff="$(git  status --porcelain 2> /dev/null)"


#
# decision for git output (path is repository)
#
if [ -z "$git_status" ]; then
  # No GIT repository
  exit
fi

#
# git preparations
#
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


#
# Start of console output
#

## STATUS AND INFO ######
if [[ $PROMPT ]]; then
  # print status
  echo -e "$git_status_color├──$COLOR_GREEN($git_branch)$git_status_color - $git_status_text - $COLOR_CYAN$git_url$COLOR_WHITE"
else
  # print status and 
  echo -e "$git_status_color┌───┤ $git_status_text ├────────────────────────────────────────────────────────────────"
  echo -e "$git_status_color│ $COLOR_GREEN($git_branch)  $COLOR_CYAN$git_url"

  if [[ ! $git_diff == "" ]]; then
    echo -e "$git_status_color├────────────────────────────────────────────────────────────────────────────────────"
  else
    echo -e "$git_status_color└────────────────────────────────────────────────────────────────────────────────────$COLOR_WHITE\n \b"
  fi
fi

## FILE INFO ############
if [[ ! $git_diff == "" ]]; then
  if [[ ! $PROMPT || "$GIT_PROMPT_DETAILS" == "on" ]]; then
    IFS=$'\n'
    for ENTRY in $git_diff; do 
      if [[ $ENTRY = "D "* ]] || [[ $ENTRY = "A "* ]] || [[ $ENTRY = "M "* ]] || [[ $ENTRY = "MM"* ]] || [[ $ENTRY = "R "* ]]; then
        echo -e "$git_status_color│ $COLOR_DARKYELLOW$ENTRY"
      else
        echo -e "$git_status_color│ $COLOR_YELLOW$ENTRY"
      fi
    done
  fi
fi

## CLOSING ##############
if [[ $PROMPT ]]; then
  echo -e " \b"
else
  echo -e "$git_status_color└────────────────────────────────────────────────────────────────────────────────────$COLOR_WHITE\n \b"
fi