#!/usr/bin/env bash

source "$rvm_scripts_path/functions/build_requirements_helpers"
source "$rvm_scripts_path/functions/build_undesired_helpers"

__rvm_requirements_run()
{
  \typeset -a packages_installed packages_missing packages_to_install packages_flags
  \typeset -a packages_undesired packages_to_remove
  \typeset -a packages_custom packages_custom_after
  \typeset __type __lib_type __iterator
  __type=$1
  __lib_type=$1
  shift

  for __iterator in load reset before define summary remove before_update update custom install custom_after after
  do
    __rvm_requirements_run_${__iterator} "$@" || return $?
  done
}

__rvm_requirements_run_load()
{
  if
    is_a_function requirements_${__type}_before ||
    is_a_function requirements_${__type}_define
  then
    rvm_debug "requirements code for ${__type} already loaded"
  else
    [[ -s "$rvm_scripts_path/functions/requirements/${__type}" ]] ||
    {
      rvm_error "Requirements support for ${__type} is not implemented yet,
report a bug here => https://github.com/rvm/rvm/issues"
      return 1
    }
    source "$rvm_scripts_path/functions/requirements/${__type}"
    if
      is_a_function requirements_${__type}_before ||
      is_a_function requirements_${__type}_define
    then
      rvm_debug "requirements code for ${__type} loaded"
    else
      rvm_error "Failed loading requirements for ${__type}!"
      return 1
    fi
  fi
}

__rvm_requirements_run_reset()
{
  packages_installed=()
  packages_missing=()
  packages_to_install=()
  packages_flags=()
  packages_undesired=()
  packages_to_remove=()
  packages_custom=()
  packages_custom_after=()
}

__rvm_requirements_run_before()
{
  if is_a_function requirements_${__type}_before
  then requirements_${__type}_before "$@" || return $?
  fi
  if [[ "${__lib_type}" != "${__type}" ]]
  then rvm_debug "requirements lib type set to ${__lib_type}"
  fi
  if [[ "${__lib_type}" != "${__type}" ]] && is_a_function requirements_${__lib_type}_before
  then requirements_${__lib_type}_before "$@" || return $?
  fi
  true # for osx
}

__rvm_requirements_run_define()
{
  \typeset -a list
  \typeset element __handler
  if is_a_function requirements_${__lib_type}_define
  then __handler=requirements_${__lib_type}_define
  else __handler=requirements_${__type}_define
  fi

  list=( rvm )
  while (( $# )) && [[ -z "$1" ]]
  do shift
  done
  if (( $# ))
  then list+=( "$@" )
  else list+=( ruby )
  fi

  for element in "${list[@]}"
  do ${__handler} "${element}" || return $?
  done
  true
}

__rvm_requirements_run_summary_custom()
{
  if (( ${rvm_autolibs_flag_number} > 2 ))
  then rvm_debug "Install $1 packages: ${_list// /, }."
  fi
  rvm_requiremnts_fail_or_run_action 3 "Missing $1 packages: ${_list}" true ||
    return $?
  true
}

__rvm_requirements_run_summary()
{
  \typeset __summary_status=0

  (( ${#packages_custom[@]} == 0 )) ||
  {
    _list="${packages_custom[*]}"
    __rvm_requirements_run_summary_custom "custom" ||
      __summary_status=$?
  }
  (( ${#packages_installed[@]} == 0 )) ||
  {
    if (( ${rvm_list_installed_packages_flag:-0} == 1 ))
    then
      requirements_print_list ${packages_installed[*]}
    fi
    _list="${packages_installed[*]}"
    rvm_debug "Found required packages: ${_list// /, }."
  }
  (( ${#packages_missing[@]} == 0 )) ||
  {
    if (( ${rvm_list_missing_packages_flag:-0} == 1 ))
    then
      requirements_print_list ${packages_missing[*]}
      __summary_status=1
    else
    _list="${packages_missing[*]}"
    rvm_requiremnts_fail_or_run_action 2 \
      "Missing required packages: ${_list}" true ||
      __summary_status=$?
    fi
  }
  (( ${#packages_undesired[@]} == 0 )) ||
  {
    if (( ${rvm_list_undesired_packages_flag:-0} == 1 ))
    then
      requirements_print_list ${packages_undesired[*]}
      __summary_status=1
    else
    _list="${packages_undesired[*]}"
    rvm_requiremnts_fail_or_run_action 2 \
      "Found undesired packages: ${_list}" true ||
      __summary_status=$?
    fi
  }
  (( ${#packages_custom_after[@]} == 0 )) ||
  {
    _list="${packages_custom_after[*]}"
    __rvm_requirements_run_summary_custom "custom after" ||
      __summary_status=$?
  }
  return ${__summary_status}
}

__rvm_requirements_run_before_update()
{
  if is_a_function requirements_${__lib_type}_before_update
  then requirements_${__lib_type}_before_update "$@" || return $?
  fi
  true # for osx
}

__rvm_requirements_run_update()
{
  if
    (( ${#packages_to_install[@]} > 0 )) ||
    (( ${#packages_custom[@]}+${#packages_custom_after[@]} > 0 && ${rvm_autolibs_flag_number} > 2 ))
  then
    rvm_log "Installing requirements for ${rvm_autolibs_flag_runner}."
    if
      is_a_function requirements_${__lib_type}_update_system
    then
      rvm_requiremnts_fail_or_run_action 3 \
        "Skipping system update, make sure your system is up to date." \
        __rvm_log_command update_system "Updating system" \
        requirements_${__lib_type}_update_system "$@" || return $?
    elif
      is_a_function requirements_${__type}_update_system
    then
      rvm_requiremnts_fail_or_run_action 3 \
        "Skipping system update, make sure your system is up to date." \
        __rvm_log_command update_system "Updating system" \
        requirements_${__type}_update_system "$@" || return $?
    fi
  fi
}

__rvm_requirements_run_custom_()
{
  \typeset __package __custom
  \typeset -a __missing_custom
  __missing_custom=()
  __custom="$1"
  shift

  while
    (( $# ))
  do
    __package="$1"
    if
      is_a_function requirements_${__lib_type}_install_${__package}
    then
      rvm_requiremnts_fail_or_run_action 2 \
        "Skipping ${__package} installation, make sure ${__package} is installed." \
        __rvm_log_command install_${__custom}_${__package} \
        "Installing required ${__custom//_/ } package: ${__package}" \
        "requirements_${__lib_type}_install_${__package}" || return $?
    elif
      is_a_function requirements_install_${__package}
    then
      rvm_requiremnts_fail_or_run_action 2 \
        "Skipping ${__package} installation, make sure ${__package} is installed." \
        __rvm_log_command install_${__custom}_${__package} \
        "Installing required ${__custom//_/ } package: ${__package}" \
        "requirements_install_${__package}" || return $?
    else
      __rvm_add_once __missing_custom "${__package}"
    fi
    shift
  done

  if
    (( ${#__missing_custom[@]} ))
  then
    if
      is_a_function requirements_${__lib_type}_install_${__custom}
    then
      rvm_requiremnts_fail_or_run_action 2 \
        "Skipping ${__missing_custom[*]} installation, make sure listed software is installed." \
        __rvm_log_command install_${__custom} \
        "Installing required ${__custom//_/ } packages: ${__missing_custom[*]}" \
        "requirements_${__lib_type}_install_${__custom}" "${__missing_custom[@]}" || return $?
    else
      rvm_requiremnts_fail_always 2 "\
Can not find function 'requirements_${__lib_type}_install_${__custom}' to install missing ${__custom//_/ } packages:
   ${__missing_custom[*]}
report a bug here:
   https://github.com/rvm/rvm/issues
" || return $?
    fi
  fi
}

__rvm_requirements_run_custom()
{
  (( ${#packages_custom[@]} )) || return 0
  __rvm_requirements_run_custom_ "custom" "${packages_custom[@]}" || return $?
}

__rvm_requirements_run_install()
{
  (( ${#packages_to_install[@]} )) || return 0
  if
    is_a_function requirements_${__lib_type}_lib_install
  then
    \typeset __package
    for __package in "${packages_to_install[@]}"
    do
      __rvm_log_command package_install_${__package} "Installing required package: ${__package}" \
        "requirements_${__lib_type}_lib_install" "${__package}" ||
      {
        \typeset __status=$?
        _list="${packages_to_install[*]}"
        rvm_warn "Failed installation package: ${__package} of: ${_list// /, }."
        return ${__status}
      }
    done
  else
    _list="${packages_to_install[*]}"
    __rvm_log_command package_install_${_list// /_} "Installing required packages: ${_list// /, }" \
      "requirements_${__lib_type}_libs_install" "${packages_to_install[@]}" ||
      return $?
  fi
}

__rvm_requirements_run_custom_after()
{
  (( ${#packages_custom_after[@]} )) || return 0
  __rvm_requirements_run_custom_ "custom_after" "${packages_custom_after[@]}" || return $?
}

__rvm_requirements_run_after()
{
  if
    is_a_function requirements_${__lib_type}_after
  then
    requirements_${__lib_type}_after "$@" || return $?
  elif
    is_a_function requirements_${__type}_after
  then
    requirements_${__type}_after "$@" || return $?
  fi
  true # for osx
}