#!/bin/bash
#
# Usage: ./Install [package names]
#   If no package names are specified then all currently
#   supported packages will be installed
#
# Versions of apt prior to 1.1 do not support install by Debian filename
# You should probably be running a more recent version of apt
# On these early versions, install with the following:
#
# sudo dpkg -i "${PKG}"
# sudo apt-get install -f

DIR_NAME="RoonCommandLine"
PKG_NAMES="RoonCommandLine"
APT_NAMES="rooncommandline"
BOLD=$(tput bold 2>/dev/null)
NORM=$(tput sgr0 2>/dev/null)
PKG_AVAILABLE=
PKG_SELECTED=

# User should not be root. Prompt to proceed if root user
iamroot=
SUDO="sudo -E"
if [ "${EUID}" ]
then
  [ ${EUID} -eq 0 ] && {
    iamroot=1
    SUDO=
  }
else
  uid=`id -u`
  [ ${uid} -eq 0 ] && {
    iamroot=1
    SUDO=
  }
fi

[ "$1" == "unattended" ] && {
  export ROON_UNATTENDED="unattended"
  shift
}

[ "${iamroot}" ] && {
  [ "${ROON_UNATTENDED}" ] || {
    printf "\nThe ${BOLD}Install${NORM} command should be run as a normal user."
    printf "\nIt appears it has been invoked with 'root' user privileges.\n\n"
    while true
    do
      read -p "Do you intend to use RoonCommandLine as the 'root' user ? (y/n) " yn
      case $yn in
          [Yy]* )
                break
                ;;
          [Nn]* )
                printf "\nRe-run this command as a normal user."
                printf "\nExiting.\n\n"
                exit 0
                ;;
              * ) echo "Please answer yes or no."
                ;;
      esac
    done
  }
}

SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )

[ -f "${SCRIPT_DIR}/VERSION" ] || {
  echo "Missing VERSION file: ${SCRIPT_DIR}/VERSION"
  echo "Exiting"
  exit 1
}

. "${SCRIPT_DIR}/VERSION"
PKG_VER=${VERSION}
PKG_REL=${RELEASE}

get_available_packages() {
  for pkgs in ${SCRIPT_DIR}/releases/${PKG_VER}/*.${SUF}
  do
    [ "${pkgs}" == "${SCRIPT_DIR}/releases/${PKG_VER}/*.${SUF}" ] || {
      for pkg in ${pkgs}
      do
        pkgname=`basename ${pkg} | sed -e "s/_${PKG_VER}-${PKG_REL}.${SUF}//"` 
        PKG_AVAILABLE="${PKG_AVAILABLE} ${pkgname}"
      done
    }
  done
  PKG_AVAILABLE=`echo $PKG_AVAILABLE | sed -e "s/^ //"`
}

install_selected() {
  for pkg in ${PKG_AVAILABLE}
  do
    if [ "${ROON_UNATTENDED}" ]; then
      PKG_SELECTED="${PKG_SELECTED} $pkg"
    else
      while true
      do
        read -p "Install ${pkg} ? ('Y'/'N'): " yn
        case $yn in
          [Yy]*)
              PKG_SELECTED="${PKG_SELECTED} $pkg"
              break
              ;;
          [Nn]*)
              break
              ;;
          * )
              echo "Please answer yes or no."
              ;;
        esac
      done
    fi
  done
  PKG_SELECTED=`echo $PKG_SELECTED | sed -e "s/^ //"`
}

plat=`uname -s`
if [ "$plat" == "Darwin" ]
then
  ./macInstall ${ROON_UNATTENDED}
else
  debian=
  have_apt=`type -p apt`
  have_dpkg=`type -p dpkg`
  have_rpm=`type -p rpm`
  have_yum=`type -p yum`
  [ -f /etc/os-release ] && . /etc/os-release
  [ "${ID_LIKE}" == "debian" ] && debian=1
  [ "${debian}" ] || [ -f /etc/debian_version ] && debian=1

  SUF=deb
  [ "${debian}" ] || SUF=rpm

  get_available_packages

  if [ "${PKG_AVAILABLE}" ]
  then
    [ "$1" ] && {
      # If invoked with -i argument, present a menu of options to select from
      if [ "$1" == "-i" ]
      then
        shift
        PKG_NAMES="$*"
        [ "${PKG_AVAILABLE}" ] && {
          echo "Currently available RoonCommandLine packages:"
          echo ""
          for avaipkg in ${PKG_AVAILABLE}
          do
            echo "$avaipkg"
          done
          echo ""
        }
        while true
        do
          PS3="${BOLD}Please enter your desire (numeric or text): ${NORM}"
          options=("Install All" "Install Selected" "Quit")
          select opt in "${options[@]}"
          do
            case "$opt,$REPLY" in
                "Install All",*|*,"Install All")
                    PKG_NAMES="${PKG_AVAILABLE}"
                    break 2
                    ;;
                "Install Selected",*|*,"Install Selected")
                    install_selected
                    PKG_NAMES="${PKG_SELECTED}"
                    break 2
                    ;;
                "Quit",*|*,"Quit"|"quit",*|*,"quit")
                    printf "\nExiting\n"
                    exit 0
                    ;;
            esac
          done
        done
      else
        PKG_NAMES="$*"
      fi
    }

    [ "${PKG_NAMES}" ] || {
      echo "No valid Package names specified. Exiting."
      exit 1
    }

    for PKG_NAME in ${PKG_NAMES}
    do
      PKG="${SCRIPT_DIR}/releases/${PKG_VER}/${PKG_NAME}_${PKG_VER}-${PKG_REL}.${SUF}"
      [ -f "${PKG}" ] || {
        echo "${PKG_NAME}_${PKG_VER}-${PKG_REL}.${SUF} not found."
        for pkgs in ${SCRIPT_DIR}/releases/*/${PKG_NAME}_*.${SUF}
        do
          [ "${pkgs}" == "${SCRIPT_DIR}/releases/*/${PKG_NAME}_*.${SUF}" ] || {
            echo "Found existing packages:"
            echo "${pkgs}"
          }
        done
        echo ""
        continue
      }

      echo "Installing ${PKG}"
      if [ "${debian}" ]
      then
        if [ "${have_apt}" ]
        then
          ${SUDO} apt install "${PKG}"
        else
          if [ "${have_dpkg}" ]
          then
            ${SUDO} dpkg -i "${PKG}"
          else
            echo "Cannot locate either apt or dpkg to install. Skipping."
          fi
        fi
      else
        if [ "${have_yum}" ]
        then
          ${SUDO} yum localinstall "${PKG}"
        else
          if [ "${have_rpm}" ]
          then
            ${SUDO} rpm -i "${PKG}"
          else
            echo "Cannot locate either yum or rpm to install. Skipping."
          fi
        fi
      fi
    done
  else
    if [ "${ROON_UNATTENDED}" ]; then
      ./linInstall unattended
    else
      while true
      do
        echo ""
        echo "No packages for version ${PKG_VER} are currently available."
        echo "Would you like to perform a scripted install on this platform?"
        echo ""
        read -p "Install ${pkg} ? ('Y'/'N'): " yn
        case $yn in
            [Yy]*)
                ./linInstall
                break
                ;;
            [Nn]*)
                break
                ;;
            *)
                echo "Please answer yes or no."
                ;;
        esac
      done
    fi
  fi
fi