#!/bin/bash

function is_privileged {
  ip link add dummy0 type dummy >/dev/null
  if [[ $? -eq 0 ]]; then
    echo "true"
    ip link delete dummy0 >/dev/null
  else
    echo "false"
  fi
}

if [ -z "$DEPLOYMENT_DNS_SUFFIX" ]; then
  echo "DEPLOYMENT_DNS_SUFFIX is required."
  exit 2
fi

if [ -z "$DEPLOYMENT_RECORD_NAMESPACE" ]; then
  echo "DEPLOYMENT_RECORD_NAMESPACE is required."
  exit 2
fi

if [ -z "$IMAGE_REGISTRY" ]; then
  echo "IMAGE_REGISTRY is required."
  exit 2
fi

if [ ! -f "/etc/config/laconic.yml" ]; then
  echo "/etc/config/laconic.yml is required."
  exit 2
fi

if [ ! -f "/etc/config/kube.yml" ]; then
  echo "/etc/config/kube.yml is required."
  exit 2
fi

STORAGE_ROOT="${STORAGE_ROOT:-/srv}"
DEPLOYMENTS_DIR="${DEPLOYMENTS_DIR:-$STORAGE_ROOT/deployments}"
LOG_DIR="${LOG_DIR:-$STORAGE_ROOT/logs}"
CONTAINERS_DIR="${CONTAINER_DIR:-$STORAGE_ROOT/containers}"

if [[ ! -d "${DEPLOYMENTS_DIR}" ]]; then
  mkdir -p "${DEPLOYMENTS_DIR}"
fi

LOG_OPTS=""
if [[ -n "${LOG_DIR}" ]]; then
  if [[ ! -d "${LOG_DIR}" ]]; then
    mkdir -p "${LOG_DIR}"
  fi
  LOG_OPTS="--log-dir $LOG_DIR"
fi

if [[ ! -d "${CONTAINERS_DIR}" ]]; then
  mkdir -p "${CONTAINERS_DIR}"
fi

if [[ "$CLEAN_DEPLOYMENTS" == "true" ]]; then
  echo "Cleaning deployments directory..."
  rm -rf ${DEPLOYMENTS_DIR}/*
fi

if [[ "$CLEAN_CONTAINERS" == "true" ]]; then
  echo "Cleaning containers directory..."
  rm -rf ${CONTAINERS_DIR}/*
fi

if [[ "$CLEAN_LOGS" == "true" ]] && [[ -n "$LOG_DIR" ]]; then
  echo "Cleaning logs directory..."
  rm -rf ${LOG_DIR}/*
fi

STORAGE_DRIVER="${STORAGE_DRIVER}"
if [[ -z "${STORAGE_DRIVER}" ]]; then
  if [[ "true" == "`is_privileged`" ]]; then
    STORAGE_DRIVER="overlay"
  else
    STORAGE_DRIVER="vfs"
  fi
fi
echo "Using '$STORAGE_DRIVER' storage driver."

cat > /etc/containers/storage.conf <<EOF
[storage]
driver = "${STORAGE_DRIVER}"
runroot = "${CONTAINERS_DIR}/podman/run"
graphroot = "${CONTAINERS_DIR}/podman/storage"
[storage.options.overlay]
mount_program = "/usr/bin/fuse-overlayfs"
EOF

if [[ -n "$IMAGE_REGISTRY_CREDS" ]]; then
  docker login --password "$IMAGE_REGISTRY_CREDS" --username ${IMAGE_REGISTRY_USER:-ANY} $IMAGE_REGISTRY
fi

cd /app/
while true; do
  UPDATE_OPTS=""
  if [[ "true" == "${ONLY_NEW_REQUESTS:-true}" ]] && [[ ! -f "${DEPLOYMENTS_DIR}/autodeploy.state" ]]; then
    UPDATE_OPTS="--only-update-state"
  fi

  echo "=============================================================="
  ps -ef | grep node | grep 'yarn start' >/dev/null
  if [ $? -ne 0 ]; then
    echo "########### STARTING API ############"
    echo "Starting API"
    yarn start &
  fi

  echo "########### UNDEPLOY ############"
  laconic-so undeploy-webapp-from-registry \
    --laconic-config /etc/config/laconic.yml \
    --deployment-parent-dir "${DEPLOYMENTS_DIR}" \
    --delete-names \
    --delete-volumes \
    --state-file "${DEPLOYMENTS_DIR}/autoremove.state" \
    --include-tags "$INCLUDE_TAGS" \
    --exclude-tags "$EXCLUDE_TAGS" \
    $EXTRA_UNDEPLOY_OPTS \
    $UPDATE_OPTS \
    --discover

  echo "############ DEPLOY #############"
  laconic-so deploy-webapp-from-registry \
    --kube-config /etc/config/kube.yml \
    --laconic-config /etc/config/laconic.yml \
    --image-registry ${IMAGE_REGISTRY} \
    --deployment-parent-dir "${DEPLOYMENTS_DIR}" \
    --dns-suffix ${DEPLOYMENT_DNS_SUFFIX} \
    --record-namespace-dns crn://${DEPLOYMENT_RECORD_NAMESPACE}/dns \
    --record-namespace-deployments crn://${DEPLOYMENT_RECORD_NAMESPACE}/deployments \
    --state-file "${DEPLOYMENTS_DIR}/autodeploy.state" \
    --include-tags "$INCLUDE_TAGS" \
    --exclude-tags "$EXCLUDE_TAGS" \
    $LOG_OPTS \
    $EXTRA_DEPLOY_OPTS \
    $UPDATE_OPTS \
    --discover

  # Cleanup any build leftovers
  if [[ "${SYSTEM_PRUNE:-false}" == "true" ]]; then
    docker system prune --all --force
  fi
  if [[ "${WEBAPP_IMAGE_PRUNE:-true}" == "true" ]]; then
    APP_IMAGES="$(docker image ls --quiet --filter 'reference=laconic-webapp')"
    DANGLING_IMAGES="$(docker image ls --quiet --filter 'dangling=true')"
    if [[ -n "$APP_IMAGES" ]] || [[ -n "$DANGLING_IMAGES" ]]; then
      echo "Pruning images: $APP_IMAGES $DANGLING_IMAGES"
      docker image rm -f $APP_IMAGES $DANGLING_IMAGES
    fi
  fi
  sleep ${CHECK_INTERVAL:-15}
done