#!/bin/bash

set -e

SHOW_HELP=0
SPECIFIED_VERSION=""
INSTALL_DIR="/opt/uptimerunner"
GITEA_BASE_URL="https://code.foss.global"
GITEA_REPO="uptime.link/uptimerunner"

while [[ $# -gt 0 ]]; do
  case $1 in
    -h|--help)
      SHOW_HELP=1
      shift
      ;;
    --version)
      SPECIFIED_VERSION="$2"
      shift 2
      ;;
    --install-dir)
      INSTALL_DIR="$2"
      shift 2
      ;;
    *)
      echo "Unknown option: $1"
      exit 1
      ;;
  esac
done

if [ $SHOW_HELP -eq 1 ]; then
  echo "uptimerunner installer"
  echo ""
  echo "Usage: curl -sSL https://code.foss.global/uptime.link/uptimerunner/raw/branch/main/install.sh | sudo bash"
  echo "Options: --version VERSION --install-dir DIR"
  exit 0
fi

if [ "$EUID" -ne 0 ]; then
  echo "Please run as root."
  exit 1
fi

detect_platform() {
  local os=$(uname -s)
  local arch=$(uname -m)

  case "$os" in
    Linux) os_name="linux" ;;
    Darwin) os_name="macos" ;;
    MINGW*|MSYS*|CYGWIN*) os_name="windows" ;;
    *) echo "Unsupported operating system: $os"; exit 1 ;;
  esac

  case "$arch" in
    x86_64|amd64) arch_name="x64" ;;
    aarch64|arm64) arch_name="arm64" ;;
    *) echo "Unsupported architecture: $arch"; exit 1 ;;
  esac

  if [ "$os_name" = "windows" ]; then
    echo "uptimerunner-${os_name}-${arch_name}.exe"
  else
    echo "uptimerunner-${os_name}-${arch_name}"
  fi
}

get_latest_version() {
  local response=$(curl -sSL "${GITEA_BASE_URL}/api/v1/repos/${GITEA_REPO}/releases/latest")
  local version=$(echo "$response" | grep -o '"tag_name":"[^"]*"' | cut -d'"' -f4)
  if [ -z "$version" ]; then
    echo "Could not determine latest release version" >&2
    exit 1
  fi
  echo "$version"
}

echo "Installing uptime.link runner..."
BINARY_NAME=$(detect_platform)
VERSION=${SPECIFIED_VERSION:-$(get_latest_version)}
DOWNLOAD_URL="${GITEA_BASE_URL}/${GITEA_REPO}/releases/download/${VERSION}/${BINARY_NAME}"

if systemctl is-active --quiet uptimerunner 2>/dev/null; then
  systemctl stop uptimerunner
fi

rm -rf "$INSTALL_DIR"
mkdir -p "$INSTALL_DIR"
curl -sSL "$DOWNLOAD_URL" -o "$INSTALL_DIR/uptimerunner"
chmod +x "$INSTALL_DIR/uptimerunner"
ln -sf "$INSTALL_DIR/uptimerunner" /usr/local/bin/uptimerunner

echo "Installed /usr/local/bin/uptimerunner"
echo "Configure with: sudo uptimerunner config write --url https://uptime.link --runner-id edge-1 --token <token>"
echo "Install service with: sudo uptimerunner service install && sudo uptimerunner service start"