#!/bin/sh
set -eu

ROOT=$(CDPATH='' cd -- "$(dirname -- "$0")/.." && pwd)
runtime_dir=${WNH_RUNTIME_ENV_DIR:-"$ROOT/output/runtime"}
target=${WNH_ANDROID_TEST_ENV_FILE:-"$runtime_dir/android-test.env"}

mkdir -p "$runtime_dir"
chmod 700 "$runtime_dir"

if [ -f "$target" ]; then
  chmod 600 "$target"
  echo "The generated Android test runtime environment already exists; no setting was changed."
  exit 0
fi

port=$(od -An -N4 -tu4 /dev/urandom | awk '{print 30000 + ($1 % 20000)}')
umask 077
{
  printf 'WNH_ANDROID_TEST_BASE_URL=http://127.0.0.1:%s\n' "$port"
} > "$target"

chmod 600 "$target"
echo "Generated isolated Android test runtime state in output/runtime/android-test.env with mode 0600."