#!/bin/sh

usage() {
  echo "Clone a git repo in XDG_PUBLICSHARE_DIR if it's set or ~/Public"
  echo ""
  echo "Usage: ${0##*/} [-b <branch>] [-d <destination>] [-n <name>] <url>"
  echo ""
  echo "Options:"
  echo "  -h                  : Show this help message"
  echo "  -b <branch>         : Specify the branch to clone"
  echo "  -d <destination>    : Specify the destination of directory"
  echo "  -n <name>           : Specify the directory name to clone into"
  echo ""
  echo "Example:"
  echo "  ${0##*/} -b master <url>        # Clone master branch"
  echo "  ${0##*/} -d ~/.local/bin <url>  # Clone the url into ~/.local/bin"
  echo "  ${0##*/} -n myrepo <url>        # Clone url named with myrepo"
  exit 1
}

# Default values
path="${XDG_PUBLICSHARE_DIR:-$HOME/Public}"

# Parse options
while getopts ":b:d:n:" opt; do
  case $opt in
  b) branch="$OPTARG" ;;
  d) path="$OPTARG" ;;
  n) dirname="$OPTARG" ;;
  *) usage ;;
  esac
done

shift $((OPTIND - 1))

[ -z "$1" ] && usage

repo="$1"

# Validate the URL (supports HTTPS and SSH Git URLs)
if ! echo "$repo" | grep -Eq '^(https://github\.com/[^/]+/[^/]+(\.git)?|git@github\.com:[^/]+/[^/]+(\.git)?)$'; then
  echo "Error: Invalid Git URL."
  exit 1
fi

# Extract the base URL for the repository (removes any trailing .git)
url="$(echo "$repo" | grep -Eo 'https://github.com/[^/]+/[^/]+' | sed 's/\.git$//')"

# Determine the directory name for cloning
if [ -n "$dirname" ]; then
  dest="$path/$dirname"
else
  dest="$path/$(basename "$url")"
fi

# Determine the clone command
if [ -n "$branch" ]; then
  git clone --branch "$branch" "$url" "$dest"
else
  git clone "$url" "$dest"
fi