#!/bin/bash

# Help
show_help() {
echo "usage: github <command> [<args>]"
echo ""
echo "Extensions github commands are:"
echo "clone <username> <repository>        Clone the repository at http://github.com/<username>/<repository>"
echo "clone <repository>                   Clone your repository at git@github.com/<username>/<repository>"
echo "commit [options]                     Commit on Github.com with your signed-of-by"
echo "info                                 Give informations contained in your .gitconfig"
echo "page                                 Update your webpages : git push origin 'master:gh-pages' && git pull origin 'master:gh-pages'"
echo "pubkey                               Give your public RSA public key"
echo "pull                                 Git pull origin master"
echo "push                                 Git push origin master"
echo "tiny <remote> <branch>               Only for SMALL projects : git pull <remote> <branch> && git add -A && git commit -s && git push <remote> <branch>"
echo "tiny                                 Only for SMALL projects : git pull origin master && git add -A && git commit -s && git push origin master"
echo "update <remote> <branch>             Git pull <remote> <branch> && Git push <remote> <branch>"
echo "update                               Git pull origin master && Git push origin master"
echo ""
echo "See 'git help' for more information on a git command."
}

# Test if no arguments have been added
if [ $# -lt 1 ]; then 
  show_help;
  exit 1;
fi

# Test the git command
git > /dev/null
if [ $? != 1 ]; then 
  echo "ERROR - Git is not installed";
  exit 2;
fi

# If you want to see all commands
if [ $1 = "help" ]
  then #echo "The list of commands:";
    show_help; 
    exit 0;
fi;

# Classical command github clone
if [ $1 = "clone" -a $# = 3 ];
  then username=$2; repository=$3; git clone git@github.com:$username/$repository; exit 0;
fi;

# Other command github clone for your repository
if [ $1 = "clone" -a $# = 2 ];
then username=`git config --global github.user`; repository=$2; git clone git@github.com:$username/$repository; exit 0;
fi;

# Classical command github commit with your signed-of-by
if [ $1 = "commit" ]
  then git commit -s $2 $3 $4 $5 $6 $7 $8 $9; exit 0;
fi;

# Github update command with branch
if [ $1 = "update" -a $# = 3 ]
  then git pull $2 $3 && git push $2 $3; exit 0;
fi;

# Github update command without branch
if [ $1 = "update" ]
  then git pull origin master && git push origin master; exit 0;
fi;

# Github update command without branch
if [ $1 = "page" -a $# = 1 ]
  then git pull origin 'master:gh-pages' && git push origin 'master:gh-pages'; exit 0;
fi;

# Github tiny command without branch
if [ $1 = "tiny" -a $# = 1 ]
  then git pull origin master && git add -A && git commit -s && git push origin master; exit 0;
fi;

# Github tiny command with branch
if [ $1 = "tiny" -a $# = 3 ]
  then git pull $2 $3 && git add -A && git commit -s && git push $2 $3; exit 0;
fi;

# Github wizard for the first use
if [ $1 = "setup" ];
  then cd ~/.ssh > /dev/null;
  if [ $? = 1 ];
  then echo -n "You have no SSH keys";
  #https://help.github.com/articles/generating-ssh-keys & https://help.github.com/articles/set-up-git
  echo -n "What email address did you register on Github?"
  read EMAIL;
  ssh-keygen -t rsa -C EMAIL;
  fi;
  echo -n "Now, add this SSH public key to your GitHub account:";
  cat ~/.ssh/id_rsa.pub;
  echo -n "See: http://help.github.com/articles/generating-ssh-keys#step4"
fi;

# Github config for awesone use
if [ $1 = "setup" ];
  then echo -n "First, What's your name?";
  read NAME;
  git config --global user.name NAME;
  echo -n "Now, What's your email?";
  read EMAIL;
  git config --global user.email EMAIL;
  echo -n "Do you wish to configure your API account? [y/n]:"
    while read -r -n 1 -s answer; do
      if [[ $answer = [YyNn] ]]; then
        [[ $answer = [Yy] ]] && retval=0
        [[ $answer = [Nn] ]] && retval=1
        break
      fi
      if retval; then
      echo -n "[1/2] What's your username?";
      read USERNAME;
      git config --global github.user USERNAME;
      echo -n "[2/2] What's your token?";
      read TOKEN;
      git config --global github.token TOKEN;
      fi;
    done
  echo -n "Do you wish to cache your credentials, to avoid typing your password everytime? [y/n]:"
    while read -r -n 1 -s answer; do
      if [[ $answer = [YyNn] ]]; then
        [[ $answer = [Yy] ]] && retval=0
        [[ $answer = [Nn] ]] && retval=1
        break
      fi
      if retval; then
      git config --global credential.helper cache;
      echo -n "What's the cache timeout? (in seconds)";
      read TIMEOUT;
      git config --global credential.helper 'cache --timeout=3600';
      fi;
    done 
  echo -n "Do you wish to configure your favorite editor? [y/n]:"
      while read -r -n 1 -s answer; do
        if [[ $answer = [YyNn] ]]; then
          [[ $answer = [Yy] ]] && retval=0
          [[ $answer = [Nn] ]] && retval=1
          break
        fi
        if retval; then
        echo "What is your favorite editor?"
        read EDITOR;
        git config --global core.edit EDITOR;
        fi;
      done
fi;

# Github info command
if [ $1 = "info" ];
  then username=`git config --global github.user`; email=`git config --global user.email`; editor=`git config --global core.editor`; name=`git config --global user.name`; token=`git config --global github.token`; cache=`git config --global credential.helper`; pubkey=`cat ~/.ssh/id_rsa.pub`; echo "Github account  :" $username; echo "Github email    :" $email; echo "Your editor     :" $editor; echo "Your name       :" $name; echo "Your cache      :" $cache; echo "Your API token  :" $token; echo "Your public key : \`github pubkey\`" ; exit 0;
fi;

# Github ssh command
if [ $1 = "pubkey" ];
  then cat ~/.ssh/id_rsa.pub; exit 0;
fi;

# TODO Github add remote command

# Github pull command
if [ $1 = "pull" -a $# = 1 ];
  then git pull origin master; exit 0;
fi;

# Github push command
if [ $1 = "push" -a $# = 1 ];
  then git push origin master; exit 0;
fi;

# Classical command git
git $*; exit 0;