#!/usr/bin/env bash

# This setup script should do the minimum work required to download the release package, unzip it, and kick off the
# setup script contained within.

# exit when any command fails
set -e

# Make sure only root can run our script
if [ "$(id -u)" != "0" ]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

start_dir=$(pwd)

ARCH=$(uname -m)
if [ "$ARCH" != "x86_64" ]; then
  echo "Breezy Vulkan only supports x86_64 currently"
  exit 1
fi

# create temp directory
tmp_dir=$(mktemp -d -t breezy-vulkan-XXXXXXXXXX)
pushd $tmp_dir > /dev/null
echo "Created temp directory: ${tmp_dir}"

binary_download_url="https://github.com/wheaney/breezy-desktop/releases/latest/download/breezyVulkan-$ARCH.tar.gz"
libs_download_url="https://github.com/wheaney/breezy-desktop/releases/latest/download/breezyVulkan-libs-$ARCH.tar.gz"
LIBS_FILE_NAME="breezyVulkan-libs-$ARCH.tar.gz"
FILE_NAME="breezyVulkan-$ARCH.tar.gz"
if [ "$1" = "-v" ]
then
  metrics_version="$2"
  local_dir_arg="$3"
elif [ "$1" = "--tag" ] && [ -n "$2" ]
then
  binary_download_url="https://github.com/wheaney/breezy-desktop/releases/download/$2/breezyVulkan-$ARCH.tar.gz"
  libs_download_url="https://github.com/wheaney/breezy-desktop/releases/download/$2/breezyVulkan-libs-$ARCH.tar.gz"
else
  local_dir_arg="$1"
fi

if [ -n "$local_dir_arg" ]
then
  if [[ "$local_dir_arg" = /* ]]; then
    local_dir="$local_dir_arg"
  else
    local_dir=$(realpath "$start_dir/$local_dir_arg")
  fi

  binary_path_arg="$local_dir/$FILE_NAME"
  if [ ! -f "$binary_path_arg" ]; then
    echo "Error: Breezy Vulkan archive not found at $binary_path_arg" 1>&2
    exit 1
  fi

  lib_path_arg="$local_dir/$LIBS_FILE_NAME"
  if [ ! -f "$lib_path_arg" ]; then
    echo "Error: Breezy Vulkan libs archive not found at $lib_path_arg" 1>&2
    exit 1
  fi
fi

if [ -z "$binary_path_arg" ]
then
  # download and unzip the binary
  binary_path_arg="$FILE_NAME"
  echo "Downloading to: ${tmp_dir}/$binary_path_arg"
  curl -L "$binary_download_url" > "$binary_path_arg"
else
  cp "$binary_path_arg" "$tmp_dir"
fi

echo "Extracting to: ${tmp_dir}/breezy_vulkan"
tar -xf $(basename "$binary_path_arg")

if [ -z "$lib_path_arg" ]
then
  lib_path_arg="$LIBS_FILE_NAME"
  echo "Downloading to: ${tmp_dir}/$lib_path_arg"
  curl -L "$libs_download_url" > "$lib_path_arg"
else
  cp "$lib_path_arg" "$tmp_dir"
fi

echo "Extracting lib to: ${tmp_dir}/breezy_vulkan"
tar -xf $(basename "$lib_path_arg")
mv breezy_desktop_lib/* breezy_vulkan/

pushd breezy_vulkan > /dev/null

# run the setup script that comes with this release
bin/setup $metrics_version

echo "Deleting temp directory: ${tmp_dir}"
rm -rf $tmp_dir
cd "$(dirs -l -0)" && dirs -c