#!/bin/bash
# shellcheck disable=SC2181 disable=SC1091 disable=SC2236

source "${TMPDIR}/androot.source"
log_diag "prepare is now executing, with arguments \"${*}\""

function arch_target() {
  log_info ""
  log_info "Please select your target architecture"
  log_info "Note: The target architecture may be different from the current"
  log_info "      architecture as it will be emulated with qemu-static (with"
  log_info "      a slight performance penality)."
  log_info "Available target architectures: x86_64, arm64"
  log_ask "Target architecture: "
  case "${ANSWER,,}" in
    "x86_64") ;;
    "arm64") ;;
    *)
      log_error "Invalid target architecture \"${ANSWER,,}\", please retry."
      arch_target
      return;;
  esac
  echo "ARCH_TARGET=${ANSWER,,}" > "${TMPDIR}/androot.env"
}
function arch_executers() {
  log_info ""
  log_info "Please specify the execution architecture(s)"
  log_info "Note: A qemu-static binary is downloaded for each execution"
  log_info "      architecture. If you intend on running the rootfs on this"
  log_info "      machine only, leave this field empty. Multiple architectures"
  log_info "      can be specified, if you want."
  log_info "Available execution architectures: x86_64, arm64, powerpc64, mips64"
  log_ask "Execution architecture(s): "
  ### MISIMPLEMENTED
  case "${ANSWER}" in
    "x86_64") ;;
    "arm64") ;;
    "powerpc64") ;;
    "mips64") ;;
    "")
      export "ANSWER=${ARCH}"
      ;;
    *)
      log_error "Invalid execution architecture \"${ANSWER,,}\", please retry."
      arch_executers
      return;;
  esac
  ### MISIMPLEMENTED
  echo "ARCH_EXECUTERS=${ANSWER}" >> "${TMPDIR}/androot.env"
}
function distribution() {
  log_info ""
  log_info "Please select the target distribution"
  log_info "Note: Each distribution you select here will be compatible"
  log_info "      with every target architecture, unless noted."
  log_info "Available distributions: archlinux"
  log_ask "Target distribution: "
  case "${ANSWER,,}" in
    "archlinux") ;;
    *)
      log_error "Invalid distribution \"${ANSWER,,}\", please retry."
      distribution
      return;;
  esac
  echo "DISTRIBUTION=${ANSWER,,}" >> "${TMPDIR}/androot.env"
}
function location() {
  log_info ""
  log_info "Please enter the rootfs location"
  ### TOBECHANGED
  log_info "Note: This location is permanent and cannot be"
  log_info "      changed as of now."
  ### TOBECHANGED_END
  log_ask "Location: "
  case "${ANSWER}" in
    /tmp*|/dev/shm/*)
      log_error "Using /tmp or /dev/shm is unsupported as you may run into disk space issues very quickly, please retry."
      location
      return;;
    /dev|/proc|/run|/sys|/dev/*|/proc/*|/run/*|/sys/*)
      log_error "Are you really trying that?"
      location
      return ;;
    /)
      log_error "you're making a recipe for desaster."
      location
      return ;;
  esac
  if [ -a "${ANSWER}" ] && [ ! -d "${ANSWER}" ]; then
    log_error "The location exists but is not a directory."
    location
    return
  fi
  if [ -d "${ANSWER}" ]; then
    if [ ! -z "$(ls -A "${ANSWER}")" ]; then
      log_error "The location directory is not empty."
      location
      return
    fi
  else
    log_info "Creating location directory"
    mkdir -p "${ANSWER}/rootfs" "${ANSWER}/bootscripts"
  fi
  echo "LOCATION=${ANSWER}" >> "${TMPDIR}/androot.env"
}

arch_target
arch_executers
distribution
location

log_diag "androot.env:\n$(cat "${TMPDIR}/androot.env")"
{
  echo "#### rootfs configuration"
  cat "${TMPDIR}/androot.env"
  echo "#### rootfs configuration"
}&>> "${TMPDIR}/androot.log"