#!/bin/sh

# check if arg 1 is a number or not
echo $1 | egrep "^[[:digit:]]+$" > /dev/null
is_not_number=$?
repo=${PWD##*/}
user=`git config github.user`

test -z "$repo" && echo "failed to detect repo" 1>&2 && exit 2
test -z "$user" && echo "failed to fetch github.user" 1>&2 && exit 3

if [ ! $is_not_number ] ; then
  # apply existing pull request
  url="https://github.com/$user/$repo/pull/$1.patch"
  echo "pulling $url"
  curl -# $url \
    | git am --signoff \
    && echo "completed pull request $request"
else
  # push
  branchname=`git branch --no-color | sed -n -e 's/^\* \(.*\)/\1/p'`
  echo "git push origin $branchname"
  git push origin $branchname

  # create new pull request
  url="https://api.github.com/repos/$user/$repo/pulls"
  echo "creating pull request"
  oauthToken=`git gh-oauth`
  body="{\"title\": \"$branchname\", \"head\": \"$user:$branchname\", \"base\": \"master\"}"
  curl_result=$(curl -H "Authorization: token $oauthToken" $url -d "$body" --silent \
      --write-out "%{http_code}")
  json=`echo ${curl_result} | sed 's/...$//'`
  http_code=`echo ${curl_request} | perl -pe 's/(.*)(...)$/$2/'`
  if [ "${http_code:0:1}" == "2" ] ; then
    pr_num=`echo "$json" | jshon -e number`
    echo "Created pull request #${pr_num}"
  else
    echo "$json" | jshon -e message
    echo "$json"
  fi
fi