#!/usr/bin/env bash
# shellcheck shell=bash
# 由 v1-legacy/run.sh、v2-maven/run.sh source：JAVA_HOME；非 JDK8 时追加 --add-opens。
#
# === 本机 JDK 8 安装根目录（含 bin/java）；换机器只需改下行默认路径或通过环境变量覆盖 ===
: "${DEPLOY_JDK8:=/usr/lib/jvm/java-8-openjdk-amd64}"

_pick_java_home() {
  if [[ "${ELEVATOR_USE_ENV_JAVA:-0}" == "1" ]] && [[ -n "${JAVA_HOME:-}" && -x "${JAVA_HOME}/bin/java" ]]; then
    return 0
  fi
  if [[ -x "${DEPLOY_JDK8}/bin/java" ]]; then
    export JAVA_HOME="${DEPLOY_JDK8}"
    return 0
  fi
  for d in /usr/lib/jvm/java-8-openjdk-amd64 /usr/lib/jvm/java-1.8.0-openjdk; do
    if [[ -x "$d/bin/java" ]]; then
      export JAVA_HOME="$d"
      return 0
    fi
  done
  if [[ -n "${JAVA_HOME:-}" && -x "${JAVA_HOME}/bin/java" ]]; then
    return 0
  fi
  export JAVA_HOME="${JAVA_HOME:-${DEPLOY_JDK8}}"
}

_jdk8_open_flags() {
  local java="$1"
  if "$java" -version 2>&1 | grep -qE 'version "1\.8\.'; then
    echo ""
    return
  fi
  echo "--add-opens=java.base/java.lang=ALL-UNNAMED"
  echo "--add-opens=java.base/java.lang.reflect=ALL-UNNAMED"
  echo "--add-opens=java.base/java.util=ALL-UNNAMED"
  echo "--add-opens=java.base/java.io=ALL-UNNAMED"
}