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

export DEBIAN_FRONTEND=noninteractive
needrestart_conf_dir="/etc/needrestart/conf.d" 
needrestart_conf_file="${needrestart_conf_dir}/temp-disable-for-umbrel-install.conf"
sudo mkdir -p "${needrestart_conf_dir}"
echo "# Restart services (l)ist only, (i)nteractive or (a)utomatically.
\$nrconf{restart} = 'l';
# Disable hints on pending kernel upgrades.
\$nrconf{kernelhints} = 0; " | sudo tee "${needrestart_conf_file}" > /dev/null
trap "sudo rm -f ${needrestart_conf_file}" EXIT

# Default options
BOOTSTRAPPED="false"
PRINT_DOCKER_WARNING="true"
UPDATE_APT="true"
INSTALL_APT_DEPS="true"
INSTALL_AVAHI="true"
INSTALL_YQ="true"
INSTALL_DOCKER="true"
INSTALL_DOCKER_COMPOSE="true"
INSTALL_START_SCRIPT="true"
INSTALL_UMBREL="true"
UMBREL_VERSION="release"
UMBREL_REPO="getumbrel/umbrel"
UMBREL_INSTALL_PATH="$HOME/umbrel"

# Parse arguments
arguments=${@:-}

if [[ "${arguments}" = *"--bootstrapped"* ]]
then
  BOOTSTRAPPED="true"
fi

if [[ "${arguments}" = *"--no-docker-warning"* ]]
then
  PRINT_DOCKER_WARNING="false"
fi

if [[ "${arguments}" = *"--no-install-avahi"* ]]
then
  INSTALL_AVAHI="false"
fi

if [[ "${arguments}" = *"--no-install-yq"* ]]
then
  INSTALL_YQ="false"
fi

if [[ "${arguments}" = *"--no-install-docker"* ]]
then
  INSTALL_DOCKER="false"
fi

if [[ "${arguments}" = *"--no-install-compose"* ]]
then
  INSTALL_DOCKER_COMPOSE="false"
fi

if [[ "${arguments}" = *"--no-install-start-script"* ]]
then
  INSTALL_START_SCRIPT="false"
fi

if [[ "${arguments}" = *"--no-install-umbrel"* ]]
then
  INSTALL_UMBREL="false"
fi

if [[ "${arguments}" = *"--no-install-deps"* ]]
then
  UPDATE_APT="false"
  INSTALL_APT_DEPS="false"
  INSTALL_AVAHI="false"
  INSTALL_YQ="false"
  INSTALL_DOCKER="false"
  INSTALL_DOCKER_COMPOSE="false"
  INSTALL_UMBREL="true"
fi

if [[ "${arguments}" = *"--version"* ]]
then
  UMBREL_VERSION="$(echo "${arguments}" | sed 's/.*--version \([^ ]*\).*/\1/')"
fi

if [[ "${arguments}" = *"--install-path"* ]]
then
  UMBREL_INSTALL_PATH="$(echo "${arguments}" | sed 's/.*--install-path \([^ ]*\).*/\1/')"
fi

get_umbrel_version() {
  version="${UMBREL_VERSION}"
  if [[ "${version}" = "release" ]]
  then
    version=$(curl --silent https://api.github.com/repos/${UMBREL_REPO}/releases/latest | sed -n 's/.*"tag_name": "\([^"]*\).*/\1/p')
  fi

  echo $version
}

bootstrap() {
  version=$(get_umbrel_version)
  curl --location --silent "https://raw.githubusercontent.com/${UMBREL_REPO}/${version}/scripts/install" | \
    bash -s -- --bootstrapped $arguments
}

update_apt() {
  sudo apt-get update --yes
}

install_apt_deps() {
  sudo apt-get install --yes fswatch jq rsync curl git gettext-base python3 gnupg
}

install_avahi() {
  sudo apt-get install --yes avahi-daemon avahi-discover libnss-mdns
}

install_yq() {
  # Define checksums for yq (4.24.5)
  declare -A yq_sha256
  yq_sha256["arm64"]="8879e61c0b3b70908160535ea358ec67989ac4435435510e1fcb2eda5d74a0e9"
  yq_sha256["amd64"]="c93a696e13d3076e473c3a43c06fdb98fafd30dc2f43bc771c4917531961c760"

  yq_version="v4.24.5"
  system_arch=$(dpkg --print-architecture)
  yq_binary="yq_linux_${system_arch}"

  # Download yq from GitHub
  yq_temp_file="/tmp/yq"
  curl -L "https://github.com/mikefarah/yq/releases/download/${yq_version}/${yq_binary}" -o "${yq_temp_file}"

  # Check file matches checksum
  if [[ "$(sha256sum "${yq_temp_file}" | awk '{ print $1 }')" == "${yq_sha256[$system_arch]}" ]]; then
    sudo mv "${yq_temp_file}" /usr/bin/yq
    sudo chmod +x /usr/bin/yq

    echo "yq installed successfully..."
  else
    echo "yq install failed. sha256sum mismatch"
    exit 1
  fi
}

install_docker() {
  # Install Docker
   curl -fsSL https://get.docker.com | sudo sh
}

install_docker_compose() {
  sudo apt-get install --yes python3-pip libffi-dev
  # We need to upgrade pip (via itself) because old pip versions in some OS repos fail to install deps.
  python3 -m pip install --upgrade pip
  sudo python3 -m pip install docker-compose
}

install_umbrel() {
  version=$(get_umbrel_version)
  curl --location "https://api.github.com/repos/${UMBREL_REPO}/tarball/${version}" | \
    tar --extract --gzip --strip-components=1 --directory="${UMBREL_INSTALL_PATH}"
}

install_systemd_service() {
echo "
[Unit]
Wants=network-online.target
After=network-online.target
Wants=docker.service
After=docker.service

# This prevents us hitting restart rate limits and ensures we keep restarting
# indefinitely.
StartLimitInterval=0

[Service]
Type=forking
TimeoutStartSec=infinity
TimeoutStopSec=16min
ExecStart=${UMBREL_INSTALL_PATH}/scripts/start
ExecStop=${UMBREL_INSTALL_PATH}/scripts/stop
User=root
Group=root
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=umbrel startup
RemainAfterExit=yes
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target" | sudo tee "/etc/systemd/system/umbrel-startup.service"
  sudo chmod 644 "/etc/systemd/system/umbrel-startup.service"
  sudo systemctl enable "umbrel-startup.service"
}

main() {
  if [[ "${BOOTSTRAPPED}" = "false" ]]
  then
    bootstrap
    exit
  fi

  if [[ "${INSTALL_UMBREL}" = "true" ]]
  then
    echo "About to install Umbrel in \"${UMBREL_INSTALL_PATH}\"."
    echo "If you would like to install somewhere else you can specify a custom location with:"
    echo
    echo "  curl -L https://umbrel.sh | bash -s -- --install-path /some/path"
    echo
    echo "Waiting for 10 seconds..."
    echo
    echo "You may press Ctrl+C now to abort the install."
    echo
    sleep 10
  fi

  if [[ "${PRINT_DOCKER_WARNING}" = "true" ]] && [[ "${INSTALL_DOCKER}" = "true" ]] && command -v docker >/dev/null 2>&1
  then

cat << 'EOF'
It looks like you already have Docker installed. Umbrel requires a modern version of Docker so this script will update them with the official Docker install script.

If you would like to disable this behaviour you can abort this install and run again with --no-install-docker or --no-install-compose.

You can pass flags to the installer like this:

  curl -L https://umbrel.sh | bash -s -- --no-install-docker --no-install-compose

Waiting for 30 seconds...

You may press Ctrl+C now to abort the install.

EOF
    sleep 30
  fi

  if [[ "${INSTALL_UMBREL}" = "true" ]]
  then
    mkdir -p "${UMBREL_INSTALL_PATH}"
    if [[ "$(ls --almost-all "${UMBREL_INSTALL_PATH}")" ]]
    then
      echo "Error: Umbrel install path \"${UMBREL_INSTALL_PATH}\" already contains files"
      echo "You can install Umbrel in a custom location with:"
      echo
      echo "  curl -L https://umbrel.sh | bash -s -- --install-path /some/path"
      exit 1
    fi
  fi

  if [[ "${UPDATE_APT}" = "true" ]]
  then
    update_apt
  fi

  if [[ "${INSTALL_APT_DEPS}" = "true" ]]
  then
    install_apt_deps
  fi

  if [[ "${INSTALL_AVAHI}" = "true" ]]
  then
    install_avahi
  fi

  if [[ "${INSTALL_YQ}" = "true" ]]
  then
    install_yq
  fi

  if [[ "${INSTALL_DOCKER}" = "true" ]]
  then
    install_docker
  fi

  if [[ "${INSTALL_DOCKER_COMPOSE}" = "true" ]]
  then
    install_docker_compose
  fi

  if [[ "${INSTALL_UMBREL}" = "true" ]]
  then
    install_umbrel

    if [[ "${INSTALL_START_SCRIPT}" = "true" ]]
    then
      install_systemd_service
    fi

    # Do the initial start outside of systemd so we get logs
    sudo ${UMBREL_INSTALL_PATH}/scripts/start

    if [[ "${INSTALL_START_SCRIPT}" = "true" ]]
    then
      # Kick off the systemd service again so it's in sync
      sudo systemctl start "umbrel-startup.service"
    fi

  echo
  echo "Umbrel has been sucessfully installed!"
  fi
}

main