#!/usr/bin/env bash
#
# Summary: Deactivate virtual environment
#
# Usage: pyenv deactivate
#
# Deactivate a Python virtual environment.

set -e
[ -n "$PYENV_DEBUG" ] && set -x

if [ -z "${PYENV_ROOT}" ]; then
  PYENV_ROOT="$(pyenv-root)"
fi

unset FORCE
unset QUIET

# Define `before_deactivate` and `after_deactivate` functions that allow
# plugin hooks to register a string of code for execution before or
# after deactivating a virtualenv.
declare -a before_hooks after_hooks

before_deactivate() {
  local hook="$1"
  before_hooks["${#before_hooks[@]}"]="$hook"
}

after_deactivate() {
  local hook="$1"
  after_hooks["${#after_hooks[@]}"]="$hook"
}

# Load plugin hooks.
OLDIFS="$IFS"
IFS=$'\n' scripts=(`pyenv-hooks deactivate`)
IFS="$OLDIFS"
for script in "${scripts[@]}"; do source "$script"; done

while [ $# -gt 0 ]; do
  case "$1" in
  "-f" | "--force" )
    FORCE=1
    ;;
  "-q" | "--quiet")
    QUIET=1
    ;;
  "-v" | "--verbose" )
    unset QUIET
    PYENV_VIRTUALENV_VERBOSE_ACTIVATE=1
    ;;
  * )
    break
    ;;
  esac
  shift 1
done

if [ -z "${VIRTUAL_ENV}" ]; then
  if [ -z "${FORCE}" ]; then
    if [ -z "${QUIET}" ]; then
      echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2
    fi
    echo "false"
    exit 1
  fi
fi

shell="$(basename "${PYENV_SHELL:-$SHELL}")"
prefix="${VIRTUAL_ENV}"

if [[ "${prefix%/*/envs/*}" == "${PYENV_ROOT}/versions" ]]; then
  venv="${prefix#${PYENV_ROOT}/versions/}"
else
  venv="${prefix##*/}"
fi

# Execute `before_deactivate` hooks.
for hook in "${before_hooks[@]}"; do eval "$hook"; done

if [ -n "$PYENV_VIRTUALENV_VERBOSE_ACTIVATE" ]; then
  echo "pyenv-virtualenv: deactivate ${venv}" 1>&2
fi

# conda package anaconda/miniconda scripts (#173)
if [ -d "${prefix}/conda-meta" ] ||
     [ -x "${prefix}/bin/conda" ]; then
  shopt -s nullglob
  case "${shell}" in
  fish )
    : # conda doesn't support fish
    ;;
  * )
    for script in "${prefix}/etc/conda/deactivate.d"/*.sh; do
      echo ". \"${script}\";"
    done
    echo "unset CONDA_PREFIX"
    ;;
  esac
  shopt -u nullglob
fi

if [ -n "${PYENV_ACTIVATE_SHELL}" ]; then
  # shell version set in pyenv-sh-activate should be unset
  # https://github.com/yyuu/pyenv-virtualenv/issues/61
  case "$shell" in
  fish )
    cat <<EOS
set -e PYENV_VERSION;
set -e PYENV_ACTIVATE_SHELL;
EOS
    ;;
  * )
    cat <<EOS
unset PYENV_VERSION;
unset PYENV_ACTIVATE_SHELL;
EOS
    ;;
  esac
fi

# virtualenv/venv
case "${shell}" in
fish )
  cat <<EOS
set -e PYENV_VIRTUAL_ENV;
set -e VIRTUAL_ENV;
EOS
  ;;
* )
  cat <<EOS
unset PYENV_VIRTUAL_ENV;
unset VIRTUAL_ENV;
EOS
  ;;
esac

# anaconda/miniconda
if [ -n "${CONDA_DEFAULT_ENV}" ]; then
  case "${shell}" in
  fish )
    echo "set -e CONDA_DEFAULT_ENV;"
    ;;
  * )
    echo "unset CONDA_DEFAULT_ENV;"
    ;;
  esac
fi

case "${shell}" in
fish )
  cat <<EOS
if [ -n "\$_OLD_VIRTUAL_PATH" ];
  set -gx PATH "\$_OLD_VIRTUAL_PATH";
  set -e _OLD_VIRTUAL_PATH;
end;
EOS
  ;;
* )
  cat <<EOS
if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
fi;
EOS
  ;;
esac

case "${shell}" in
fish )
  cat <<EOS
if [ -n "\$_OLD_VIRTUAL_PYTHONHOME" ];
  set -gx PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
  set -e _OLD_VIRTUAL_PYTHONHOME;
end;
EOS
  ;;
* )
  cat <<EOS
if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
fi;
EOS
  ;;
esac

case "${shell}" in
fish )
  cat <<EOS
# check if old prompt function exists
if functions -q _pyenv_old_prompt
  # remove old prompt function if exists.
  functions -e fish_prompt
  functions -c _pyenv_old_prompt fish_prompt
  functions -e _pyenv_old_prompt
end
EOS
  ;;
* )
  cat <<EOS
if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
fi;
EOS
  ;;
esac

case "${shell}" in
fish )
  cat <<EOS
if functions -q deactivate;
  functions -e deactivate;
end;
EOS
  ;;
* )
  cat <<EOS
if declare -f deactivate 1>/dev/null 2>&1; then
  unset -f deactivate;
fi;
EOS
  ;;
esac

# Execute `after_deactivate` hooks.
for hook in "${after_hooks[@]}"; do eval "$hook"; done