#!/usr/bin/env bash
set -euo pipefail

OS="$(uname -s)"

if [[ "$OS" == "Darwin" ]]; then
  APPDATA_PATH="$HOME/Library/Preferences"
else
  echo "[macos] This script is not intended to be used on os $OS"
  exit 1
fi

DOCKER_VOLUME="trm_state"
HOST_CWD="$(pwd)"
DOCKER_INIT="$HOST_CWD/init"

USER_ARGS=()

while [[ $# -gt 0 ]]; do
  case "$1" in
    --docker-volume)
      DOCKER_VOLUME="$2"
      shift 2
      ;;
    --docker-init)
      if [[ "$2" = /* ]]; then
        DOCKER_INIT="$2"
      else
        DOCKER_INIT="$HOST_CWD/$2"
      fi
      shift 2
      ;;
    *)
      USER_ARGS+=("$1")
      shift
      ;;
  esac
done

BASE_ARGS=(
  run --rm -it
  --platform linux/amd64
  -v "${DOCKER_VOLUME}:/var/lib/trm"
  -v "$APPDATA_PATH:/appdata"
  -v "$HOST_CWD:/work"
  -w /work
  -e APPDATA=/appdata
)

volume_exists() {
  docker volume inspect "$DOCKER_VOLUME" >/dev/null 2>&1
}

create_with_init() {
  echo "[macos] Creating volume $DOCKER_VOLUME"
  docker volume create "$DOCKER_VOLUME" >/dev/null

  ARGS=(
    "${BASE_ARGS[@]}"
    -v "$DOCKER_INIT:/installdata:ro"
    -e INSTALLDATA=/installdata
    abaptrm/docker trm
  )
}

if [[ "${#USER_ARGS[@]}" -gt 0 ]]; then
  ARGS=("${BASE_ARGS[@]}" abaptrm/docker trm "${USER_ARGS[@]}")
else
  if volume_exists; then
    read -r -p "[macos] Volume '$DOCKER_VOLUME' already exists. Do you want to delete and recreate it? [y/N] " REPLY
    if [[ "$REPLY" =~ ^[Yy]$ ]]; then
      echo "[macos] Deleting volume $DOCKER_VOLUME"
      docker volume rm "$DOCKER_VOLUME" >/dev/null
      create_with_init
    else
      ARGS=("${BASE_ARGS[@]}" abaptrm/docker trm)
    fi
  else
    create_with_init
  fi
fi

docker "${ARGS[@]}"