#!/bin/bash

# Installs node.js + dependencies for both Ubuntu and OS X

#
# See https://github.com/coolaj86/node-install-script
#

# curl -fsSL https://example.com/setup.bash | bash
# wget -nv https://example.com/setup.bash -O - | bash

NODEJS_NAME="node"
NODEJS_BASE_URL="https://nodejs.org"
BASE_URL="https://raw.githubusercontent.com/coolaj86/node-install-script/master"
NO_FAIL2BAN=""
OS="unsupported"
ARCH=""
NODEJS_VER=""
SETUP_FILE=""

clear



#########################
# Which OS and version? #
#########################

if [ "$(uname | grep -i 'Darwin')" ]; then
  OSX_VER="$(sw_vers | grep ProductVersion | cut -d':' -f2 | cut -f2)"
  OSX_MAJOR="$(echo ${OSX_VER} | cut -d'.' -f1)"
  OSX_MINOR="$(echo ${OSX_VER} | cut -d'.' -f2)"
  OSX_PATCH="$(echo ${OSX_VER} | cut -d'.' -f3)"

  #
  # Major
  #
  if [ "$OSX_MAJOR" -lt 10 ]; then
    echo "unsupported OS X version (os 9-)"
    exit 1
  fi

  if [ "$OSX_MAJOR" -gt 10 ]; then
    echo "unsupported OS X version (os 11+)"
    exit 1
  fi

  #
  # Minor
  #
  if [ "$OSX_MINOR" -le 5 ]; then
    echo "unsupported OS X version (os 10.5-)"
    exit 1
  fi

  # Snow
  if [ "$OSX_MINOR" -eq 6 ]; then
    OS='snow'
  fi

  # Lion
  if [ $OSX_MINOR -eq 7 ]; then
    OS='lion'
  fi

  # Mountain Lion
  if [ "$OSX_MINOR" -eq 8 ]; then
    OS='mountain'
  fi

  # Mavericks, Yosemite
  if [ "$OSX_MINOR" -ge 9 ]; then
    OS='mavericks'
  fi

  if [ -n "$(sysctl hw | grep 64bit | grep ': 1')" ]; then
    ARCH="64"
  else
    ARCH="32"
  fi
elif [ "$(uname | grep -i 'Linux')" ]; then
  if [ ! -f "/etc/issue" ]; then
    echo "unsupported linux os"
    exit 1
  fi

  if [ -n "$(arch | grep 64)" ]; then
    ARCH="64"
  else
    ARCH="32"
  fi

  if [ "$(cat /etc/issue | grep -i 'Ubuntu')" ]; then
    OS='ubuntu'
  elif [ "$(cat /etc/issue | grep -i 'Linux Mint')" ]; then
    OS='ubuntu'
  elif [ "$(cat /etc/issue | grep -i 'elementary OS')" ]; then
    OS='ubuntu'
  elif [ "$(cat /etc/issue | grep -i 'Debian')" ]; then
    OS='ubuntu'
  elif [ "$(cat /etc/issue | grep -i 'Trisquel')" ]; then
    OS='ubuntu'
  elif [ "$(cat /etc/issue | grep -i 'Raspbian')" ]; then
    OS='raspbian'
  elif [ "$(cat /etc/issue | grep -i 'Fedora')" ]; then
    OS='fedora'
  fi
else
  echo "unsupported unknown os (non-mac, non-linux)"
  exit 1
fi

case "${OS}" in
  fedora)
    echo "FEDORA not yet supported (feel free to pull request)"
    exit 1
    ;;
  ubuntu)
    SETUP_FILE="ubuntu"
    ;;
  raspbian)
    SETUP_FILE="ubuntu"
    ;;
  yosemite)
    # mavericks
    SETUP_FILE="mavericks"
    ;;
  mavericks)
    SETUP_FILE="mavericks"
    ;;
  mountain)
    echo "Mountain Lion not yet supported (feel free to pull request)"
    exit 1
    ;;
  lion)
    echo "Lion not yet supported (feel free to pull request)"
    exit 1
    ;;
  snow)
    echo "Snow Leopard not yet supported (feel free to pull request)"
    exit 1
    ;;
  *)
    echo "unsupported unknown os ${OS}"
    exit 1
    ;;
esac




#######################
# Download installers #
#######################

echo "Preparing to install ${NODEJS_NAME} (and common development dependencies) for ${OS}" "${ARCH}"

INSTALL_DEPS_FILE="setup-deps-${SETUP_FILE}.bash"
INSTALL_FILE="setup-node-${SETUP_FILE}.bash"
if [ ! -e "/tmp/${INSTALL_DEPS_FILE}" ]
then
  if [ -n "$(which curl)" ]; then
    curl --silent "${BASE_URL}/${INSTALL_DEPS_FILE}" \
      -o "/tmp/${INSTALL_DEPS_FILE}" || echo 'error downloading os deps script: '"${BASE_URL}/${INSTALL_DEPS_FILE}"
    curl --silent "${BASE_URL}/${INSTALL_FILE}" \
      -o "/tmp/${INSTALL_FILE}" || echo 'error downloading os setup script: '"${BASE_URL}/${INSTALL_FILE}"
  elif [ -n "$(which wget)" ]; then
    wget --quiet "${BASE_URL}/${INSTALL_DEPS_FILE}" \
      -O "/tmp/${INSTALL_DEPS_FILE}" || echo 'error downloading os deps script: '"${BASE_URL}/${INSTALL_DEPS_FILE}"
    wget --quiet "${BASE_URL}/${INSTALL_FILE}" \
      -O "/tmp/${INSTALL_FILE}" || echo 'error downloading os setup script: '"${BASE_URL}/${INSTALL_FILE}"
  else
    echo "Found neither 'curl' nor 'wget'. Can't Continue."
    exit 1
  fi
fi

if [ ! -e "/tmp/${INSTALL_DEPS_FILE}" ]
then
  echo "Error Downloading Install File"
  exit 1
fi


################
# DEPENDENCIES #
################

if [ -z "$(which fail2ban-server | grep fail2ban)" ]; then
  echo ""
  echo "Your server didn't come with fail2ban preinstalled!!!"
  echo "Among other things, fail2ban secures ssh so that your server isn't reaped by botnets."
  echo ""
  echo "Since you're obviously connecting this computer to a network, you should install fail2ban before continuing"
  echo ""
  echo "Install fail2ban? [Y/n]"
  echo "(if unsure, just hit [enter])"
  read INSTALL_FAIL2BAN

  if [ "n" == "${INSTALL_FAIL2BAN}" ] || [ "no" == "${INSTALL_FAIL2BAN}" ] || [ "N" == "${INSTALL_FAIL2BAN}" ] || [ "NO" == "${INSTALL_FAIL2BAN}" ]; then
    echo ""
    echo "I don't think you understand: This is important."
    echo ""
    echo "Your server will be under constant attack by botnets via ssh."
    echo "It only takes a few extra seconds to install and the defaults are adequate for protecting you."
    echo ""
    echo "Change your mind?"
    echo "Ready to install fail2ban? [Y/n]"
    read INSTALL_FAIL2BAN
    if [ "n" == "${INSTALL_FAIL2BAN}" ] || [ "no" == "${INSTALL_FAIL2BAN}" ] || [ "N" == "${INSTALL_FAIL2BAN}" ] || [ "NO" == "${INSTALL_FAIL2BAN}" ]; then
      clear
      echo "you make me sad :-("
      sleep 0.5
      echo "but whatever, it's your funeral..."
      sleep 1
      NO_FAIL2BAN="nope"
    else
      echo "Phew, dodged the bullet on that one... Will install fail2ban.. :-)"
    fi
  fi
fi

bash "/tmp/${INSTALL_DEPS_FILE}" "${NO_FAIL2BAN}"

#########################
# Which node.js VERSION ? #
#########################

if [ -f "/tmp/NODEJS_VER" ]; then
  NODEJS_VER=$(cat /tmp/NODEJS_VER | grep v)
elif [ -f "/tmp/IOJS_VER" ]; then
  NODEJS_VER=$(cat /tmp/IOJS_VER | grep v)
fi

if [ -n "$NODEJS_VER" ]; then
  NODEJS_VERT=$(echo ${NODEJS_VER} | cut -c 2- | cut -d '.' -f1)

  if [ $NODEJS_VERT -ge 1 ] && [ $NODEJS_VERT -lt 4 ]
  then
    echo "Selecting io.js instead of node.js for this version (>= 1.0.0 < 4.0.0)"
    NODEJS_BASE_URL="https://iojs.org"
    NODEJS_NAME="iojs"
  fi
fi

if [ -z "$NODEJS_VER" ]; then
  if [ -n "$(which curl)" ]; then
    NODEJS_VER=$(curl -fsL "$NODEJS_BASE_URL/dist/index.tab" | head -2 | tail -1 | cut -f 1) \
      || echo "error automatically determining current ${NODEJS_NAME} version"
  elif [ -n "$(which wget)" ]; then
    NODEJS_VER=$(wget --quiet "$NODEJS_BASE_URL/dist/index.tab" -O - | head -2 | tail -1 | cut -f 1) \
      || echo "error automatically determining current ${NODEJS_NAME} version"
  else
    echo "Found neither 'curl' nor 'wget'. Can't Continue."
    exit 1
  fi
fi

#
# node
#
if [ -n "$(which node | grep node 2>/dev/null)" ]; then
# node of some version is already installed
  if [ "${NODEJS_VER}" == "$(node -v 2>/dev/null)" ]; then
    echo node ${NODEJS_VER} is already installed
  else
    echo ""
    echo "HEY, LISTEN:"
    echo ""
    echo "node.js is already installed as node $(node -v | grep v)"
    echo ""
    echo "to reinstall please first run: rm $(which node)"
    echo ""
  fi

  NODEJS_VER=""
fi

if [ -n "${NODEJS_VER}" ]; then
  bash "/tmp/${INSTALL_FILE}" "${NODEJS_VER}"
fi

# jshint
if [ -z "$(which jshint | grep jshint)" ]; then
  echo "installing jshint..."
  npm install --silent jshint -g > /dev/null
fi

echo ""