#! /usr/bin/env bash

projdir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null && pwd)"
prefix="$HOME/.local"
VERSION='0.12.0'

#
# Help screen
#
help() {
  cat << OEF
Script used to manipulate the VxSDK, a set of tools for the Vhex Operating
System project.

Usage $0 [ACTION]

Actions:
  bootstrap             Try to bootstrap the vxSDK itself [default]
  install               Install the VxSDK
  uninstall             Uninstall the VxSDK

Options:
  --force               Force reinstallation
  --prefix=<PREFIX>     Installation prefix (default is ~/.local)
  -h, --help            Display this help
OEF
  exit 0
}



#
# Parse arguments
#

target='install'
force_reinstall='false'

for arg; do case "$arg" in
  --help | -h)
    help;;
  -v | --version)
    echo "$VERSION"
    exit 0;;
  --force)
    force_reinstall='true'
    ;;

  install)
    target='install';;
  update)
    target='update';;
  uninstall)
    target='uninstall';;
  uninstall-cached)
    target='uninstall-cached';;
  *)
    echo "error: unreconized argument '$arg', giving up." >&2
    exit 1
esac; done



#
# Process
#

if [[ "$target" = "install" ]]
then
  if [[ -d "$prefix/lib/vxsdk/vxsdk" ]]
  then
    echo 'warning : vxsdk is already installed !' >&2
    read -n 1 -p 'Do you whant to re-install the vxSDK [y/N] ? ' -r reinstall
    [[ "$reinstall" != 'y' ]] && exit 1
    echo ''
    "$projdir/install.sh" uninstall-cached
  fi

  install -d "$prefix/lib/vxsdk/vxsdk"
  cp -r \
    "$projdir/requirements.txt" \
    "$projdir/assets" \
    "$projdir/vxsdk" \
    "$prefix/lib/vxsdk/"

  install -d "$prefix/bin"
  echo '#! /usr/bin/env bash'                         > "$prefix/bin/vxsdk"
  echo ''                                            >> "$prefix/bin/vxsdk"
  echo "source $prefix/lib/vxsdk/venv/bin/activate"  >> "$prefix/bin/vxsdk"
  echo "python3 $prefix/lib/vxsdk/vxsdk \$@"         >> "$prefix/bin/vxsdk"
  echo 'deactivate'                                  >> "$prefix/bin/vxsdk"
  chmod +x "$prefix/bin/vxsdk"

  build_date=$(date '+%Y-%m-%d')
  build_hash=$(git rev-parse --short HEAD)
  f="$prefix/lib/vxsdk/vxsdk/__main__.py"
  sed \
    -e "s*%VERSION%*$VERSION*"       \
    -e "s*%BUILD_HASH%*$build_hash*" \
    -e "s*%BUILD_DATE%*$build_date*" \
    "$projdir/vxsdk/__main__.py"     \
  > "$f"

  mkdir -p "$prefix/share/vxsdk"

  cd "$prefix/lib/vxsdk" || exit 1
  if [[ ! -d venv ]] || [[ "$force_reinstall" == 'true' ]]
  then
    set -x; python3 -m venv venv; set +x
    source venv/bin/activate
    set -x
    { pip install --upgrade pip > /dev/null ; } 2>&1
    pip install -r requirements.txt
    set +x
    deactivate
  else
    source venv/bin/activate
    set -x; pip install -r requirements.txt; set +x
    deactivate
  fi
  exit 0
fi


# same as uninstall but do not remove the venv
if [[ "$target" = 'uninstall-cached' ]]
then
  set -x
  rm "$prefix/bin/vxsdk"
  rm -rf "$prefix/lib/vxsdk/vxsdk"
  rmdir "$prefix/share/vxsdk" 2>/dev/null || exit 0
  echo 'vxSDK has been partially removed'
  exit 0
fi


if [[ "$target" = 'uninstall' ]]
then

  # TODO : rm -rf dependencies too
  # TODO : add confirmation input
  rm "$prefix/bin/vxsdk"
  rm -rf "$prefix/lib/vxsdk"
  rmdir "$prefix/share/vxsdk" 2>/dev/null || exit 0
  echo 'vxSDK has been removed'
  exit 0

fi


#if [[ "$target" = "update" ]]
#then
#
#  git \
#    clone                             \
#    git@github.com:Vhex-org/vxSDK.git \
#    --depth=1                         \
#    /tmp/vxSDK                        \
#  > /dev/null 2>&1 || exit 84
#  cd /tmp/vxSDK
#
#  if [[ "$(./install.sh --version)" == "$VERSION" ]]
#  then
#    rm -rf /tmp/vxSDK
#    echo 'already up to date !'
#    exit 0
#  fi
#
#  _check=$(echo -e "$(./install.sh --version)\n$VERSION" | sort -V | head -n1)
#
#  if [[ "$_check" != "$VERSION" ]]; then
#    rm -rf /tmp/vxSDK
#    echo 'already up to date !'
#    exit 0
#  fi
#
#  echo "update $VERSION -> $(./install.sh --version)"
#
#  ./install.sh uninstall
#  ./install.sh install
#
#  rm -rf /tmp/vxSDK
#
#fi
#
#
#
#if [[ "$target" = "uninstall" ]]
#then
#
#  rm $prefix/bin/vxsdk
#  rm -rf $prefix/lib/vxsdk
#  rmdir $prefix/share/vxsdk 2>/dev/null || exit 0
#  echo 'note: repositories cloned by vxSDK have not been removed'
#  exit 0
#
#fi