#!/usr/bin/env bash
# Summary: Configure the shell environment for jenv
# Usage: eval "$(jenv init - [--no-rehash] [<shell>])"

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

print=""
no_rehash=""
for args in "$@"
do
  if [ "$args" = "-" ]; then
    print=1
		shift
  fi

  if [ "$args" = "--no-rehash" ]; then
    no_rehash=1
    shift
  fi
done

shell="$1"
if [ -z "$shell" ]; then
  if [ -n "$BASH_VERSION" ]; then
      shell="bash"
  elif [ -n "$ZSH_VERSION" ]; then
      shell="zsh"
  elif [ -n "$FISH_VERSION" ]; then
      shell="fish"
  elif [ -n "$KSH_VERSION" ]; then
      shell="ksh"
  else
      shell="unknown"
  fi
fi

resolve_link() {
  $(type -p greadlink readlink | head -1) $1
}

abs_dirname() {
  local cwd="$(pwd)"
  local path="$1"

  while [ -n "$path" ]; do
    cd "${path%/*}"
    local name="${path##*/}"
    path="$(resolve_link "$name" || true)"
  done

  pwd
  cd "$cwd"
}

root="$(abs_dirname "$0")/.."

if [ -z "$print" ]; then
  case "$shell" in
  bash )
    profile='~/.bash_profile'
    ;;
  zsh )
    profile='~/.zshrc'
    ;;
  ksh )
    profile='~/.profile'
    ;;
  fish )
    profile='~/.config/fish/config.fish'
    ;;
  * )
    profile='your profile'
    ;;
  esac

  { echo "# Load jenv automatically by adding"
    echo "# the following to ${profile}:"
    echo
    case "$shell" in
    fish )
      echo 'status --is-interactive; and source (jenv init -|psub)'
      ;;
    * )
      echo 'eval "$(jenv init -)"'
      ;;
    esac
    echo
  } >&2

  exit 1
fi

mkdir -p "${JENV_ROOT}/"{shims,plugins,versions}

case "$shell" in
fish )
  echo "set -gx PATH '${JENV_ROOT}/shims' \$PATH"
  echo "set -gx JENV_SHELL $shell"
  echo "set -gx JENV_LOADED 1"
  echo "set -e JAVA_HOME"
  echo "set -e JDK_HOME"
  ;;
bash | zsh | * )
  echo 'export PATH="'${JENV_ROOT}'/shims:${PATH}"'
  echo "export JENV_SHELL=$shell"
  echo "export JENV_LOADED=1"
  echo "unset JAVA_HOME"
  echo "unset JDK_HOME"
  ;;
esac

completion="${root}/completions/jenv.${shell}"
if [ -r "$completion" ]; then
  echo "source '$completion'"
fi

if [ -z "$no_rehash" ]; then
  echo 'jenv rehash 2>/dev/null'
fi

echo "jenv refresh-plugins"

for script in $(jenv-hooks init $shell); do
  echo "source \"$script\""
done

commands=(`jenv-commands --sh`)
case "$shell" in
fish )
  IFS=" "
  cat <<EOS
function jenv
  set command \$argv[1]
  set -e argv[1]

  switch "\$command"
  case ${commands[*]}
    source (jenv "sh-\$command" \$argv|psub)
  case '*'
    command jenv "\$command" \$argv
  end
end
EOS
  ;;
bash | zsh | * )
  IFS="|"
  cat <<EOS
jenv() {
  typeset command
  command="\$1"
  if [ "\$#" -gt 0 ]; then
    shift
  fi

  case "\$command" in
  ${commands[*]})
    eval \`jenv "sh-\$command" "\$@"\`;;
  *)
    command jenv "\$command" "\$@";;
  esac
}
EOS
  ;;
esac