#!/usr/bin/env bash

# Exit immediately if a command exits with a non-zero status
set -e

# Check for administrative privileges
if [[ "$EUID" -ne 0 ]]; then
  echo "Error: This script must be run as root." >&2
  exit 1
fi

# Detect architecture
ARCH=$(uname -m)
if [[ "$ARCH" == "x86_64" ]]; then
  ARCH="x86_64"
elif [[ "$ARCH" == "aarch64" || "$ARCH" == "arm64" ]]; then
  ARCH="arm64"
else
  echo "Unsupported architecture: $ARCH"
  exit 1
fi

# Create a temporary directory and ensure it is deleted on exit
TMP_DIR=$(mktemp -d)
trap "rm -rf $TMP_DIR" EXIT

echo "Created temporary directory: $TMP_DIR"

# Fetch the latest release download URL for the correct architecture
DOWNLOAD_URL=$(curl -s https://api.github.com/repos/garethgeorge/backrest/releases/latest | \
grep "browser_download_url.*backrest_Linux_${ARCH}.tar.gz" | \
cut -d '"' -f 4)

if [[ -z "$DOWNLOAD_URL" ]]; then
  echo "Failed to get the download URL for the latest release."
  exit 1
fi

echo "Downloading from: $DOWNLOAD_URL"

# Download and extract the tarball
wget -qO- "$DOWNLOAD_URL" | tar -xz -C "$TMP_DIR"

# Run the installer
if [[ -f "$TMP_DIR/install.sh" ]]; then
  echo "Running install.sh..."
  bash "$TMP_DIR/install.sh"
else
  echo "Error: install.sh not found in $TMP_DIR."
  exit 1
fi

# Reload systemd and restart the service
echo "Reloading systemd daemon..."
systemctl daemon-reload

echo "Restarting backrest service..."
systemctl restart backrest

echo "Installation complete."