#!/usr/bin/env bash

is_java_core() {
  local core="$1"
  case "$core" in
    paper|purpur|velocity|powernukkitx) return 0 ;;
    *) return 1 ;;
  esac
}

install_java_21() {
  if command -v java >/dev/null 2>&1; then
    local version
    version="$(java -version 2>&1 | sed -n 's/.*version "\(.*\)".*/\1/p' | head -n1 | sed 's/"//g' | sed 's/^\([0-9][0-9]*\).*/\1/')"
    if [[ "$version" =~ ^[0-9]+$ ]] && (( version >= 21 )); then
      info "$(t java_already_available "$version")"
      return 0
    fi
  fi

  info "$(t installing_java_21)"
  case "$PKG_MANAGER" in
    apt)
      emit_step "java_install" "apt"
      run_cmd apt-get install -y openjdk-21-jre-headless
      ;;
    dnf|yum)
      emit_step "java_install" "$PKG_MANAGER"
      run_cmd "$PKG_MANAGER" install -y java-21-openjdk-headless
      ;;
    pacman)
      emit_step "java_install" "pacman"
      run_cmd pacman -Sy --noconfirm jre-openjdk-headless
      ;;
  esac
}

create_java_start_script() {
  local dir="$1"
  local jar_file="$2"
  local ram="$3"
  local extra_opts="${4:-}"

  local script="$dir/start.sh"
  emit_step "render_start_script" "$jar_file"
  run_cmd bash -c "cat > '$script' <<EOF
#!/usr/bin/env bash
set -e
cd \"\$(dirname \"\$0\")\"
exec java -Xms${ram} -Xmx${ram} ${extra_opts} -jar ${jar_file} nogui
EOF"
  run_cmd chmod +x "$script"
  emit_step "chmod_start_script" "$script"
}

create_powernukkit_start_script() {
  local dir="$1"
  local ram="$2"

  local script="$dir/start.sh"
  emit_step "render_start_script" "powernukkitx.jar"
  run_cmd bash -c "cat > '$script' <<EOF
#!/usr/bin/env bash
set -e
cd \"\$(dirname \"\$0\")\"
exec java -Xms${ram} -Xmx${ram} \\
  -Dfile.encoding=UTF-8 \\
  -Djansi.passthrough=true \\
  -Dterminal.ansi=true \\
  --add-opens java.base/java.lang=ALL-UNNAMED \\
  --add-opens java.base/java.io=ALL-UNNAMED \\
  --add-opens java.base/java.net=ALL-UNNAMED \\
  -jar powernukkitx.jar
EOF"
  run_cmd chmod +x "$script"
  emit_step "chmod_start_script" "$script"
}