#!/bin/bash

usage () {
  echo "------BPM-Setup options------"
  echo "bpm-setup -D <directory> | Path to package directory"
  echo "bpm-setup -y | Skips confirmation prompt"
  echo "bpm-setup -n <name> | Set the package name (Defaults to \"package-name\")"
  echo "bpm-setup -d <description> | Set the package description (Defaults to \"Default package description\")"
  echo "bpm-setup -v <version> | Set the package version (Defaults to \"1.0\")"
  echo "bpm-setup -u <url> | Set the package URL (Optional)"
  echo "bpm-setup -l <licenses> | Set the package licenses (Optional)"
  echo "bpm-setup -t <binary/source> | Set the package type to binary or source (Defaults to binary)"
  echo "bpm-setup -s <source template file> | Use a default template file (Defaults to /etc/bpm-utils/source.default)"
}

if [ $# -eq 0 ]; then
  usage
  exit
fi

NAME="package-name"
DESCRIPTION="Default package description"
VERSION="1.0"
#URL="https://my.project.url/ (Optional)"
#LICENSE="Your project's license (Optional)"
TYPE="binary"
SOURCE_FILE="/etc/bpm-utils/source.default"

while getopts "D:n:d:v:u:l:t:s:y" o; do
  case "${o}" in
    D)
      DIRECTORY="${OPTARG}"
      ;;
    y)
      CONFIRM=yes
      ;;
    n)
      NAME="${OPTARG}"
      ;;
    d)
      DESCRIPTION="${OPTARG}"
      ;;
    v)
      VERSION="${OPTARG}"
      ;;
    u)
      URL="${OPTARG}"
      ;;
    l)
      LICENSE="${OPTARG}"
      ;;
    t)
      TYPE="${OPTARG}"
      ;;
    s)
      SOURCE_FILE="$(realpath ${OPTARG})"
      ;;
    *)
      usage
      exit 1
      ;;
  esac
done

if [ -z "${DIRECTORY}" ]; then
  echo "Required directory argument missing. Try 'bpm-setup -D <directory> [other options...]"
  exit 1
fi

if [[ ! "${DIRECTORY}" == "/"* ]]; then
  DIRECTORY="${PWD}/${DIRECTORY}"
fi

if [ -e "${DIRECTORY}" ]; then
  echo "This path already exists"
  exit 1
fi

if [[ "$TYPE" != "binary" ]] && [[ "$TYPE" != "source" ]]; then
  echo "Invalid package type! Package type must be either 'binary' or 'source'"
  exit 1
fi


if [ -z "${CONFIRM}" ]; then
  echo "Setting up package working directory at ${DIRECTORY} with the following information:"
  echo "Package name: $NAME"
  echo "Package description: $DESCRIPTION"
  echo "Package version: $VERSION"
  if [ -z "${URL}" ]; then
    echo "Package URL: Not set"
  else
    echo "Package URL: $URL"
  fi
  if [ -z "${LICENSE}" ]; then
    echo "Package license: Not set"
  else
    echo "Package license: $LICENSE"
  fi
  
  echo "Package type: $TYPE"
  read -p "Create package directory? [y/N]: " CREATE
  case $CREATE in
    [Yy]* )
      ;;
    *)
      echo "Exiting bpm-setup..."
      exit
      ;;
  esac
fi

if ! mkdir -pv $DIRECTORY; then
  echo "Could not create $DIRECTORY!"
  exit 1
fi

cd $DIRECTORY

touch pkg.info
echo "name: ${NAME}" >> pkg.info
echo "description: ${DESCRIPTION}" >> pkg.info
echo "version: ${VERSION}" >> pkg.info
if [ ! -z "${URL}" ]; then echo "url: ${URL}" >> pkg.info; fi
if [ ! -z "${LICENSE}" ]; then echo "license: ${LICENSE}" >> pkg.info; fi

if [[ "$TYPE" == "binary" ]]; then
  echo "architecture: $(uname -m)" >> pkg.info
  echo "type: binary" >> pkg.info
  mkdir -pv files
  echo "Package directory created successfully!"
  echo "Make sure to edit the pkg.info file with the appropriate information for your package"
  echo "Add your binaries under the 'files' directory. For example a binary called 'my_binary' should go under files/usr/bin/my_binary"
  echo "You can turn your package into a .bpm file use the 'bpm-create <name>' command"
else
  echo "architecture: any" >> pkg.info
  echo "type: source" >> pkg.info
  mkdir -pv source-files
  if [ -f "${SOURCE_FILE}" ]; then
    touch source.temp
    cat "${SOURCE_FILE}" > source.temp
    export NAME DESCRIPTION VERSION URL LICENSE TYPE
    envsubst '$NAME:$DESCRIPTION:$VERSION:$URL:$LICENSE:$TYPE' < source.temp > source.sh
    rm source.temp
  else
    echo "Source file at ${SOURCE_FILE} does not exist! Creating empty source.sh instead..."
    touch source.sh
  fi
  echo "Package directory created successfully!"
  echo "Make sure to edit the pkg.info file with the appropriate information for your package"
  echo "Add your compilation code in the source.sh file. Follow the instructions on the template file on how to properly create your compilation script"
  echo "You can add additional files that will be used during compilation to the 'source-files' directory"
  echo "You can turn your package into a .bpm file use the 'bpm-package <filename>' command"
fi