#!/bin/bash

set -e

if [[ -n "$1" ]]; then
  tag="$1"
fi

is_debian() {
  [[ -f /etc/debian_version ]]
}

is_alpine() {
  [[ -f /etc/alpine-release ]]
}

check_package_version_exists() {
  if ! stat /tmp/kasmvncserver_"$package_version"*.deb; then
    >&2 echo "No package found for version $package_version"
    exit 1
  fi
}

remove_tagged_debs_unless_tag_used() {
  if [[ -n "$tag" ]]; then
    return
  fi

  rm -f /tmp/kasmvncserver_*+*.deb
}

detect_rpm_package_manager() {
  if command -v dnf >/dev/null; then
    rpm_package_manager=dnf
  else
    rpm_package_manager=yum
  fi
}

install_package_built_for_current_branch_package_version_deb() {
  remove_tagged_debs_unless_tag_used

  apt-get update
  apt-get install -y dpkg-dev
  package_version=$(dpkg-parsechangelog --show-field Version \
    --file /tmp/changelog)

  check_package_version_exists
  dpkg_arch=$(dpkg-architecture -q DEB_BUILD_ARCH)
  apt-get install -y /tmp/kasmvncserver_"$package_version"*"$tag"*_${dpkg_arch}.deb
}

detect_dnf_command() {
  if command -v dnf5 >/dev/null; then
    echo dnf install -y --allowerasing
  else
    echo dnf localinstall -y --allowerasing
  fi
}

install_package_built_for_current_branch_package_version_rpm() {
  detect_rpm_package_manager
  $rpm_package_manager install -y rpmdevtools

  package_version=$(rpmspec -q --qf '%{version}\n' /tmp/kasmvncserver.spec 2>/dev/null)
  package_name=/tmp/kasmvncserver-"$package_version"*.$(arch).rpm
  if [[ $rpm_package_manager = "dnf" ]]; then
    local dnf_cmd=$(detect_dnf_command)
    $dnf_cmd $package_name
  else
    yum install -y $package_name
  fi
}

install_package_built_for_current_branch_package_version_apk() {
  package_version=$(sed -n 's/pkgver=\(.\+\)/\1/p' /tmp/APKBUILD )
  apk add /tmp/kasmvncserver-"$package_version"*.apk /tmp/kasmvncserver-doc-"$package_version"*.apk --allow-untrusted
}

if is_debian ; then
  install_package_built_for_current_branch_package_version_deb
elif is_alpine; then
  install_package_built_for_current_branch_package_version_apk
else
  install_package_built_for_current_branch_package_version_rpm
fi