#!/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
unset VERBOSE

while [ $# -gt 0 ]; do
  case "$1" in
  "-f" | "--force" )
    FORCE=1
    ;;
  "--no-error" )
    # for backward compatibility with v20151103 and earlier
    QUIET=1
    ;;
  "-q" | "--quiet")
    QUIET=1
    ;;
  "-v" | "--verbose" )
    VERBOSE=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

echo "pyenv-virtualenv: deactivate ${venv}" 1>&2

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/pyvenv
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" ];
  setenv 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" ];
  setenv 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
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