#!/usr/bin/env bash
set -o errexit
set -o pipefail

main() {
  local target="${1:-system0}"
  "_run_${target}"
}

_run_system0() {
  set -o xtrace
  cd /tmp

  sudo swapon --show | if ! grep -q /swap; then
    sudo fallocate -l 8G /swap
    sudo chmod 600 /swap
    sudo mkswap -L swap /swap
    sudo swapon /swap
  fi

  if ! grep -q ^LABEL=swap /etc/fstab &>/dev/null; then
    echo 'LABEL=swap none swap sw 0 0' | sudo tee -a /etc/fstab
  fi

  sudo sysctl vm.swappiness=10
  echo 'vm.swappiness=10' | sudo tee /etc/sysctl.d/99-swappiness.conf

  sudo sysctl vm.vfs_cache_pressure=50
  echo 'vm.vfs_cache_pressure=50' |
    sudo tee /etc/sysctl.d/99-cache-pressure.conf

  sudo apt-get update -y
  sudo apt-get install -y \
    build-essential \
    ca-certificates \
    curl \
    git \
    gnupg \
    nginx-full \
    redis

  dpkg --get-selections || true |
    if ! grep -qE '^postgresql-client-11.+install$'; then
      echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" |
        sudo tee /etc/apt/sources.list.d/pgdg.list &>/dev/null
      curl https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
      sudo apt-get update -y
      sudo apt-get install -y postgresql-11 postgresql-client-11
    fi

  pg_ctlcluster 11 main start
  sudo -H -u postgres bash <<PGSETUP
    set -o allexport
    source /tmp/app.env
    createuser spoke || true
    createdb --owner=spoke spoke || true
    psql -c "GRANT ALL ON DATABASE spoke TO spoke"
    set +o xtrace
    psql -c "ALTER USER spoke WITH PASSWORD '\${DB_PASSWORD}';"
PGSETUP

  if ! command -v yarn; then
    curl -fsSL https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
    echo "deb https://dl.yarnpkg.com/debian/ stable main" |
      sudo tee /etc/apt/sources.list.d/yarn.list
    sudo apt-get update -y
    sudo apt-get install -y --no-install-recommends yarn
  fi

  if ! getent passwd spoke; then
    sudo useradd --create-home --comment 'Spoke app' spoke
  fi

  sudo chsh -s /bin/bash spoke
  sudo chown -R spoke:spoke /home/spoke

  mv -v /tmp/spoke.crt /home/spoke/spoke.crt
  mv -v /tmp/spoke.key /home/spoke/spoke.key
  chmod 0600 /home/spoke/spoke.crt /home/spoke/spoke.key
  cp -v /tmp/nginx-sites-default.conf /etc/nginx/sites-available/default
  ln -svf /etc/nginx/sites-available/default /etc/nginx/sites-enabled/default
  sha1sum /etc/nginx/sites-available/default
  systemctl restart nginx
}

_run_system1() {
  set -o xtrace
  sudo cp -v /tmp/spoke.service /etc/systemd/system/spoke.service

  sudo systemctl enable spoke
  sudo systemctl stop spoke || true
  sudo systemctl start spoke || true
}

_run_spoke0() {
  set -o xtrace

  git --version
  if [[ ! -d /home/spoke/app/.git ]]; then
    git clone https://github.com/MoveOnOrg/Spoke.git /home/spoke/app
  fi
  cd /home/spoke/app
  git checkout -qf 'v5.1'

  cp -v /tmp/spoke-app-run /home/spoke/spoke-app-run
  chmod +x /home/spoke/spoke-app-run

  if ! command -v nvm; then
    curl -fsSL \
      https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.2/install.sh | bash
    set +o errexit
    set +o xtrace
    source ~/.nvm/nvm.sh
    set -o xtrace
    set -o errexit
  fi
  nvm --version 2>/dev/null
  nvm install 2>/dev/null
  nvm use 2>/dev/null

  cp -v /tmp/app.env /home/spoke/app/.env
  sha1sum /home/spoke/app/.env

  set -o allexport
  source /home/spoke/app/.env
  set +o allexport

  yarn --version
  yarn install --ignore-scripts --non-interactive --frozen-lockfile

  local git_head
  git_head="$(cat .git/HEAD || true)"
  local yarn_prod_build_ref
  yarn_prod_build_ref="$(
    cat /home/spoke/yarn_prod_build_ref 2>/dev/null || true
  )"
  if [[ "${git_head}" == "${yarn_prod_build_ref}" ]]; then
    echo "skipping yarn run prod-build"
    return
  fi

  yarn run prod-build
  rm -rf ./node_modules
  yarn install --production --ignore-scripts
  echo "${git_head}" >/home/spoke/yarn_prod_build_ref
}

main "${@}"