#!/bin/sh

# shellcheck source=conf/default.conf
. "${0%/*}/../conf/default.conf"

# shellcheck disable=SC2016
usage() {
  >&2 echo ''
  >&2 echo 'modify-package-state [options] packages-file:'
  >&2 echo ' modify state (file) of package(s).'
  >&2 echo ''
  >&2 echo 'possible options:'
  >&2 echo '  -b|--block:       Block package(s).'
  >&2 echo '  -f|--faulty:      Mark testing/tested package(s) as faulty.'
  >&2 echo '  -h|--help:        Show this help and exit.'
  >&2 echo '  -n|--no-report:   Do not report what packages were modified.'
  >&2 echo '  -t|--tested:      Mark package(s) as tested.'
  >&2 echo '  -u|--unblock:     Unblock package(s).'
  >&2 echo ''
  >&2 echo 'Exactly one of -b|-t|-u is needed for actual operation.'
  [ -z "$1" ] && exit 1 || exit "$1"
}

eval set -- "$(
  getopt -o bfhntu \
    --long block \
    --long faulty \
    --long help \
    --long no-report \
    --long tested \
    --long unblock \
    -n "$(basename "$0")" -- "$@" || \
  echo usage
)"

action=''
report=true

while true
do
  case "$1" in
    -b|--block)
      if [ -n "${action}" ]; then
        >&2 echo 'Conflicting/redundand arguments.'
        usage
      fi
      action='block'
    ;;
    -f|--faulty)
      if [ -n "${action}" ]; then
        >&2 echo 'Conflicting/redundand arguments.'
        usage
      fi
      action='faulty'
    ;;
    -h|--help)
      usage 0
    ;;
    -n|--no-report)
      report=false
    ;;
    -t|--tested)
      if [ -n "${action}" ]; then
        >&2 echo 'Conflicting/redundand arguments.'
        usage
      fi
      action='tested'
    ;;
    -u|--unblock)
      if [ -n "${action}" ]; then
        >&2 echo 'Conflicting/redundand arguments.'
        usage
      fi
      action='unblock'
    ;;
    --)
      shift
      break
    ;;
    *)
      >&2 echo 'Whoops, forgot to implement option "'"$1"'" internally.'
      exit 42
    ;;
  esac
  shift
done

if [ -z "${action}" ]; then
  >&2 echo 'Expected -b|-f|-t|-u.'
  usage
fi

if [ $# -ne 1 ]; then
  >&2 echo 'Too few or too many arguments.'
  usage
fi

clean_up() {
  rm -rf --one-file-system "${tmp_dir}"
}
tmp_dir=$(mktemp -d 'tmp.modify-package-state.XXXXXXXXXX' --tmpdir)
trap clean_up EXIT

input_file="$1"
if ${report}; then
  if ! [ -w "${input_file}" ]; then
    >&2 printf \
      'Cannot open file "%s" for writing.' \
      "${input_file}"
    exit 2
  fi
  move_output() {
    cat "${output_file}" > "${input_file}"
    clean_up
  }
  output_file="${tmp_dir}/output-file"
  touch "${output_file}"
  trap 'move_output' EXIT
else
  output_file='/dev/null'
fi

if ! [ -r "${input_file}" ]; then
  >&2 printf \
    'Cannot open file "%s" for reading.' \
    "${input_file}"
  exit 2
fi

exec 9> "${sanity_check_lock_file}"
if ! flock -s -n 9; then
  >&2 echo 'Cannot get sanity-check lock.'
  exit
fi

if [ "${action}" = 'tested' ]; then
  receive_buglist 'Testing' > \
    "${tmp_dir}/package-bug-titles"
fi

{
  err=0
  while read -r package reason; do
    if echo "${package}" | \
      grep -q '\.pkg\.tar\.xz$'; then
      package=$(
        find "${work_dir}/package-states" -maxdepth 1 \( -name '*.tested' -o -name '*.testing' \) \
          -exec grep -qxF "${package}" '{}' \; \
          -printf '%f\n' | \
          sed 's|\.[^.]\+$||' | \
          sort -u
      )
      if [ -z "${package}" ]; then
        continue
      fi
    fi
    if [ "${action}" = 'block' ] || \
      [ "${action}" = 'unblock' ]; then
      # these packages need to be on the build list
      if ! tr ' ' '.' < \
        "${work_dir}/build-list" | \
        grep -qxF "${package}"; then
        >&2 printf 'Package "%s" is not on the build-list.\n' "${package}"
        err=2
        continue
      fi
    fi
    case "${action}" in
      'block')
        if [ -z "${reason}" ]; then
          >&2 printf 'No reason is given for blocking package "%s".\n' "${package}"
          err=2
        else
          echo "${reason}" > \
            "${work_dir}/package-states/${package}.blocked"
          printf '%s %s\n' "${package}" "${reason}"
        fi
      ;;
      'faulty')
        if [ -f "${work_dir}/package-states/${package}.tested" ]; then
          mv \
            "${work_dir}/package-states/${package}.tested" \
            "${work_dir}/package-states/${package}.testing"
          printf '%s\n' "${package}"
        fi
      ;;
      'tested')
        if [ -f "${work_dir}/package-states/${package}.testing" ] && \
          ! grep -qF "[${package%.*.*.*}]" "${tmp_dir}/package-bug-titles"; then
          mv \
            "${work_dir}/package-states/${package}.testing" \
            "${work_dir}/package-states/${package}.tested"
          printf '%s\n' "${package}"
        fi
      ;;
      'unblock')
        if [ -f "${work_dir}/package-states/${package}.blocked" ]; then
          rm "${work_dir}/package-states/${package}.blocked"
          printf '%s\n' "${package}"
        fi
      ;;
      *)
        >&2 printf 'Whooops, action "%s" not implemented yet.\n' "${action}"
        exit 42
      ;;
    esac
  done > \
    "${output_file}"

  exit ${err}
} < \
  "${input_file}"