#!/usr/bin/env bash

requirements_arch_lib_installed_all_missing()
{
  pacman -T "$@" || true
}

requirements_arch_lib_installed() {
  pacman -Qq "$1" >/dev/null 2>&1 || return $?
}

requirements_arch_lib_available()
{
  pacman -Ssq "^${1}$" >/dev/null 2>&1 || return $?
}

requirements_arch_libs_install()
{
  __rvm_try_sudo pacman -Sy --needed --noconfirm "$@" || return $?
}

requirements_arch_libs_remove()
{
  __rvm_try_sudo pacman -Rs --noconfirm "$@" || return $?
}

requirements_arch_update_system()
{
  # Has to be ran separately so new version can be used for installing missing libs
  requirements_arch_libs_install pacman || return $?
}

requirements_arch_define_check_raspberry_pi()
{
  if
    [[ "${_system_arch}" == "arm"* ]]
  then
    # assuming all arm will need this fix
    requirements_check_fallback ntp openntpd chrony
  fi
}

requirements_arch_define_openssl()
{
  case "$1" in
    (ruby-2.3*|ruby-2.2*|ruby-2.1*|ruby-2.0*|ruby-1.9*)
      requirements_check openssl-1.0

      # Ruby should respect pkg-config in case of openssl (it does not have to be the case with other extensions)
      # https://github.com/ruby/ruby/blob/trunk/ext/openssl/extconf.rb#L38
      export PKG_CONFIG_PATH="/usr/lib/openssl-1.0/pkgconfig${PKG_CONFIG_PATH:+:}${PKG_CONFIG_PATH:-}"
      ;;
    (*)
      requirements_check openssl
      ;;
  esac
}

requirements_arch_define()
{
  requirements_arch_define_check_raspberry_pi

  case "$1" in
    (rvm)
      requirements_check bash curl patch
      ;;
    (jruby*)
      requirements_check curl make

      if
        is_head_or_disable_binary "$1"
      then
        requirements_check_fallback jdk8-openjdk jdk7-openjdk
        requirements_check git
        case $( jruby_installation_method  "$1" ) in
          ant) __rvm_which ant >/dev/null || requirements_check apache-ant ;;
          mvn) __rvm_which mvn >/dev/null || requirements_check maven      ;;
        esac
      else
        requirements_check_fallback jre8-openjdk jre7-openjdk
      fi
      ;;
    (ir*)
      requirements_check mono
      ;;
    (opal)
      requirements_check nodejs
      ;;
    (rbx*head|rubinius*head)
      undesired_check clang35 llvm35 llvm35-libs
      requirements_check clang llvm llvm-libs patch curl zlib readline autoconf automake diffutils make libtool bison git
      ;;
    (rbx-3*|rubinius-3*)
      undesired_check clang35 llvm35 llvm35-libs
      requirements_check clang llvm llvm-libs patch curl zlib readline autoconf automake diffutils make libtool bison
      ;;
    (rbx-2*|rubinius-2*)
      undesired_check clang llvm llvm-libs
      requirements_check clang35 llvm35 llvm35-libs patch curl zlib readline autoconf automake diffutils make libtool bison
      ;;
    (rbx-1*|rubinius-1*)
      undesired_check clang llvm llvm-libs
      requirements_check clang35 llvm35 llvm35-libs patch curl zlib readline autoconf automake diffutils make libtool bison
      ;;
    (truffleruby*)
      requirements_check zlib make gcc libxml2
      requirements_arch_define_openssl "$1"
      ;;
    (ruby-2.3*|ruby-2.2*|ruby-2.1*|ruby-2.0*|ruby-1.9*)
      requirements_check gcc patch curl zlib readline autoconf automake diffutils make libtool bison sqlite git
      requirements_arch_define_openssl "$1"
      ;;
    (*-head)
      requirements_check gcc patch curl zlib readline autoconf automake diffutils make libtool bison sqlite git
      requirements_arch_define_openssl "$1"
      ;;
    (*)
      requirements_check gcc patch curl zlib readline autoconf automake diffutils make libtool bison sqlite
      requirements_arch_define_openssl "$1"
      ;;
  esac
}

requirements_arch_service()
{
  systemctl $1 $3 >/dev/null ||
  if __rvm_try_sudo systemctl $2 $3
  then true
  else
    \typeset __arch_status=$?
    rvm_error "There was a problem running 'systemctl $2 $3' with exit status '$__arch_status'."
    return $__arch_status
  fi
}

requirements_arch_after_check_raspberry_pi()
{
  if
    [[ "${_system_arch}" == "arm"* ]]
  then
    ntp_servers=( ntpd systemd-timesyncd openntpd chronyd )
    for ntp_server in "${ntp_servers[@]}"
    do
      if
        systemctl list-unit-files | grep -Fq "$ntp_server.service" &&
        systemctl is-active $ntp_server
      then
        return 0
      fi
    done
    for ntp_server in "${ntp_servers[@]}"
    do
      if
        systemctl list-unit-files | grep -Fq "$ntp_server.service"
      then
        requirements_arch_service is-enabled enable $ntp_server &&
        requirements_arch_service is-active  start  $ntp_server ||
        return $?
      fi
    done
  fi
}

requirements_arch_after()
{
  requirements_arch_after_check_raspberry_pi
}

requirements_manjaro_define()
{
  __lib_type=arch
  requirements_arch_define "$@" || return $?
}