#!/usr/bin/env bash

install_nodejs() {
  local install_type=$1
  local version=$2
  local install_path=$3

  if [ "$TMPDIR" = "" ]; then
    local tmp_download_dir=$(mktemp -d)
  else
    local tmp_download_dir=$TMPDIR
  fi

  local source_path=$(get_download_file_path $install_type $version $tmp_download_dir)
  download_source_file $install_type $version $source_path

  # running this in a subshell
  # we don't want to disturb current working dir
  (
    if [ "$install_type" != "version" ]; then
      tar zxf $source_path -C $install_path --strip-components=1 || exit 1
      cd $install_path

      local configure_options="$(construct_configure_options $install_path)"

      ./configure $configure_options || exit 1
      make
      make install

      if [ $? -ne 0 ]; then
        rm -rf $install_path
        exit 1
      fi
    else
      tar zxf $source_path -C $install_path --strip-components=1 || exit 1
    fi

    mkdir -p $install_path/.npm/lib/node_modules/.hooks
    cp $(dirname $(dirname $0))/npm-hooks/* $install_path/.npm/lib/node_modules/.hooks/
    chmod +x $install_path/.npm/lib/node_modules/.hooks/*
  )
}


construct_configure_options() {
  local install_path=$1

  if [ "$NODEJS_CONFIGURE_OPTIONS" = "" ]; then
    local configure_options="$(os_based_configure_options) --prefix=$install_path"

    if [ "$NODEJS_EXTRA_CONFIGURE_OPTIONS" != "" ]; then
      configure_options="$configure_options $NODEJS_EXTRA_CONFIGURE_OPTIONS"
    fi
  else
    local configure_options="$NODEJS_CONFIGURE_OPTIONS --prefix=$install_path"
  fi

  echo "$configure_options"
}


os_based_configure_options() {
  local operating_system=$(uname -a)
  local configure_options=""

  if [[ "$operating_system" =~ "x86_64" ]]; then
    local cpu_type="x64"
  else
    local cpu_type="x86"
  fi

  configure_options="$configure_options --dest-cpu=$cpu_type"
  echo $configure_options
}


download_source_file() {
  local install_type=$1
  local version=$2
  local download_path=$3
  local download_url=$(get_download_url $install_type $version)

  curl -Lo $download_path -C - $download_url
}


get_download_file_path() {
  local install_type=$1
  local version=$2
  local tmp_download_dir=$3


  if [ "$install_type" = "version" ]; then
    if [[ "$operating_system" =~ "x86_64" ]]; then
      local cpu_type="x64"
    else
      local cpu_type="x86"
    fi

    if [[ "$operating_system" =~ "Darwin" ]]; then
      local pkg_name="node-v${version}-darwin-${cpu_type}"
    else # we'll assume it is linux
      local pkg_name="node-v${version}-linux-${cpu_type}"
    fi
  else
    local pkg_name="${version}.tar.gz"
  fi

  echo "$tmp_download_dir/$pkg_name"
}


get_download_url() {
  local install_type=$1
  local version=$2
  local operating_system=$(uname -a)

  if [ "$install_type" = "version" ]; then
    if [[ "$operating_system" =~ "x86_64" ]]; then
      local cpu_type="x64"
    else
      local cpu_type="x86"
    fi

    if [[ "$operating_system" =~ "Darwin" ]]; then
      echo "https://nodejs.org/dist/v${version}/node-v${version}-darwin-${cpu_type}.tar.gz"
    else # we'll assume it is linux
      echo "https://nodejs.org/dist/v${version}/node-v${version}-linux-${cpu_type}.tar.gz"
    fi
  else
    echo "https://github.com/nodejs/node/archive/${version}.tar.gz"
  fi
}


install_nodejs $ASDF_INSTALL_TYPE $ASDF_INSTALL_VERSION $ASDF_INSTALL_PATH