#!/usr/bin/env bash

# Copyright 2016 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/../..
source "${KUBE_ROOT}/hack/lib/init.sh"

kube::golang::setup_env
kube::golang::setup_gomaxprocs

# start the cache mutation detector by default so that cache mutators will be found
KUBE_CACHE_MUTATION_DETECTOR="${KUBE_CACHE_MUTATION_DETECTOR:-true}"
export KUBE_CACHE_MUTATION_DETECTOR

# panic the server on watch decode errors since they are considered coder mistakes
KUBE_PANIC_WATCH_DECODE_ERROR="${KUBE_PANIC_WATCH_DECODE_ERROR:-true}"
export KUBE_PANIC_WATCH_DECODE_ERROR

focus=${FOCUS:-""}
label_filter=${LABEL_FILTER:-""}
if [ -n "${label_filter}" ]; then
  skip=${SKIP:-""} # No default skip when LABEL_FILTER is set.
else
  skip=${SKIP-"\[Flaky\]|\[Slow\]|\[Serial\]"}
fi
# The number of tests that can run in parallel depends on what tests
# are running and on the size of the node. Too many, and tests will
# fail due to resource contention. 8 is a reasonable default for a
# e2-standard-2 node.
# Currently, parallelism only affects when REMOTE=true. For local test,
# ginkgo default parallelism (cores - 1) is used.
parallelism=${PARALLELISM:-8}
artifacts="${ARTIFACTS:-"/tmp/_artifacts/$(date +%y%m%dT%H%M%S)"}"
remote=${REMOTE:-"false"}
remote_mode=${REMOTE_MODE:-"gce"}
container_runtime_endpoint=${CONTAINER_RUNTIME_ENDPOINT:-"unix:///run/containerd/containerd.sock"}
image_service_endpoint=${IMAGE_SERVICE_ENDPOINT:-""}
run_until_failure=${RUN_UNTIL_FAILURE:-"false"}
test_args=${TEST_ARGS:-""}
timeout_arg=""
system_spec_name=${SYSTEM_SPEC_NAME:-}
extra_envs=${EXTRA_ENVS:-}
runtime_config=${RUNTIME_CONFIG:-}
ssh_user=${SSH_USER:-"${USER}"}
ssh_key=${SSH_KEY:-}
ssh_options=${SSH_OPTIONS:-}
kubelet_config_file=${KUBELET_CONFIG_FILE:-"test/e2e_node/jenkins/default-kubelet-config.yaml"}

# If set, the command executed will be:
# - `dlv exec` if set to "delve"
# - `gdb` if set to "gdb"
# NOTE: for this to work the e2e_node.test binary has to be compiled with DBG=1.
#
# The name of this variable is the same as in ginkgo-e2e.sh.
debug_tool=${E2E_TEST_DEBUG_TOOL:-}
if [ "${remote}" = true ] && [ -n "${debug_tool}" ]; then
    echo "Support for E2E_TEST_DEBUG_TOOL=${debug_tool} is only implemented for REMOTE=false."
    exit 1
fi

# Parse the flags to pass to ginkgo
ginkgoflags="-timeout=24h"
if [[ ${parallelism} -gt 1 ]]; then
  ginkgoflags="${ginkgoflags} -nodes=${parallelism} "
fi

if [[ ${focus} != "" ]]; then
  ginkgoflags="${ginkgoflags} -focus=\"${focus}\" "
fi

if [[ ${skip} != "" ]]; then
  ginkgoflags="${ginkgoflags} -skip=\"${skip}\" "
fi

if [[ ${label_filter} != "" ]]; then
  ginkgoflags="${ginkgoflags} --label-filter=\"${label_filter}\" "
fi

if [[ ${run_until_failure} == "true" ]]; then
  ginkgoflags="${ginkgoflags} --until-it-fails=true "
fi

# Setup the directory to copy test artifacts (logs, junit.xml, etc) from remote host to local host
if [ ! -d "${artifacts}" ]; then
  echo "Creating artifacts directory at ${artifacts}"
  mkdir -p "${artifacts}"
fi
echo "Test artifacts will be written to ${artifacts}"

if [[ -n ${container_runtime_endpoint} ]] ; then
  test_args="--container-runtime-endpoint=${container_runtime_endpoint} ${test_args}"
fi
if [[ -n ${image_service_endpoint} ]] ; then
  test_args="--image-service-endpoint=${image_service_endpoint} ${test_args}"
fi

if [[ "${test_args}" != *"prepull-images"* ]]; then
  test_args="--prepull-images=${PREPULL_IMAGES:-false}  ${test_args}"
fi

if [ "${remote}" = true ] && [ "${remote_mode}" = gce ] ; then
  # The following options are only valid in remote GCE run.
  images=${IMAGES:-""}
  hosts=${HOSTS:-""}
  image_project=${IMAGE_PROJECT:-"cos-cloud"}
  metadata=${INSTANCE_METADATA:-""}
  gubernator=${GUBERNATOR:-"false"}
  instance_type=${INSTANCE_TYPE:-""}
  node_env="${NODE_ENV:-""}"
  network="${NETWORK:-""}"
  subnet="${SUBNET:-""}"
  image_config_file=${IMAGE_CONFIG_FILE:-""}
  image_config_dir=${IMAGE_CONFIG_DIR:-""}
  use_dockerized_build=${USE_DOCKERIZED_BUILD:-"false"}
  target_build_arch=${TARGET_BUILD_ARCH:-""}
  runtime_config=${RUNTIME_CONFIG:-""}
  if [[ ${hosts} == "" && ${images} == "" && ${image_config_file} == "" ]]; then
    gci_image=$(gcloud compute images list --project "${image_project}" \
    --no-standard-images --filter="name ~ 'cos-beta.*'" --format="table[no-heading](name)")
    images=${gci_image}
    metadata="user-data<${KUBE_ROOT}/test/e2e_node/jenkins/gci-init.yaml,gci-update-strategy=update_disabled"
  fi
  instance_prefix=${INSTANCE_PREFIX:-"test"}
  cleanup=${CLEANUP:-"true"}
  delete_instances=${DELETE_INSTANCES:-"false"}
  preemptible_instances=${PREEMPTIBLE_INSTANCES:-"false"}
  test_suite=${TEST_SUITE:-"default"}
  if [[ -n "${TIMEOUT:-}" ]] ; then
    timeout_arg="--test-timeout=${TIMEOUT}"
  fi

  # Get the compute zone
  zone=${ZONE:-"$(gcloud info --format='value(config.properties.compute.zone.value)')"}
  zone=${zone// /}
  if [[ ${zone} == "" ]]; then
    echo "Could not find gcloud compute/zone when running: \`gcloud info --format='value(config.properties.compute.zone.value)'\`"
    exit 1
  fi

  # Get the compute project
  project=$(gcloud info --format='value(config.project)')
  project=${project// /}
  if [[ ${project} == "" ]]; then
    echo "Could not find gcloud project when running: \`gcloud info --format='value(config.project)'\`"
    exit 1
  fi

  # Check if any of the images specified already have running instances.  If so reuse those instances
  # by moving the IMAGE to a HOST
  if [[ ${images} != "" ]]; then
  IFS=',' read -ra IM <<< "${images}"
       images=""
       for i in "${IM[@]}"; do
         if gcloud compute instances list --project="${project}" --filter="name:'${instance_prefix}-${i}' AND zone:'${zone}'" | grep "${i}"; then
           if [[ "${hosts}" != "" ]]; then
             hosts="${hosts},"
           fi
           echo "Reusing host ${instance_prefix}-${i}"
           hosts="${hosts}${instance_prefix}-${i}"
         else
           if [[ "${images}" != "" ]]; then
             images="${images},"
           fi
           images="${images}${i}"
         fi
       done
  fi

  # Use cluster.local as default dns-domain
  test_args='--dns-domain="'${KUBE_DNS_DOMAIN:-cluster.local}'" '${test_args}
  test_args='--kubelet-flags="--cluster-domain='${KUBE_DNS_DOMAIN:-cluster.local}'" '${test_args}

  # Output the configuration we will try to run
  echo "Running tests remotely using"
  echo "Project: ${project}"
  echo "Image Project: ${image_project}"
  echo "Compute/Zone: ${zone}"
  if [[ -n ${images} ]]; then
    echo "Images: ${images}"
  fi
  if [[ -n ${hosts} ]]; then
    echo "Hosts: ${hosts}"
  fi
  echo "Test Args: ${test_args}"
  echo "Ginkgo Flags: ${ginkgoflags}"
  if [[ -n ${metadata} ]]; then
    echo "Instance Metadata: ${metadata}"
  fi
  if [[ -n ${node_env} ]]; then
    echo "Node-env: \"${node_env}\""
  fi
  if [[ -n ${image_config_file} ]]; then
    echo "Image Config File: ${image_config_dir}/${image_config_file}"
  fi
  if [[ -n ${instance_type} ]]; then
    echo "Instance Type: ${instance_type}"
  fi
  if [[ -n ${network} ]]; then
    echo "Network: ${network}"
  fi
  if [[ -n ${subnet} ]]; then
    echo "Subnet: ${subnet}"
  fi
  echo "Kubelet Config File: ${kubelet_config_file}"

  # Invoke the runner
  go run test/e2e_node/runner/remote/run_remote.go  --vmodule=*=4 --ssh-env="gce" \
    --zone="${zone}" --project="${project}" --gubernator="${gubernator}" \
    --hosts="${hosts}" --images="${images}" --cleanup="${cleanup}" \
    --results-dir="${artifacts}" --ginkgo-flags="${ginkgoflags}" \
    --image-project="${image_project}" --instance-name-prefix="${instance_prefix}" \
    --delete-instances="${delete_instances}" --test_args="${test_args}" --instance-metadata="${metadata}" \
    --image-config-file="${image_config_file}" --system-spec-name="${system_spec_name}" \
    --network="${network}" --subnet="${subnet}" \
    --runtime-config="${runtime_config}" --preemptible-instances="${preemptible_instances}" \
    --ssh-user="${ssh_user}" --ssh-key="${ssh_key}" --ssh-options="${ssh_options}" \
    --image-config-dir="${image_config_dir}" --node-env="${node_env}" \
    --use-dockerized-build="${use_dockerized_build}" --instance-type="${instance_type}" \
    --target-build-arch="${target_build_arch}" \
    --extra-envs="${extra_envs}" --kubelet-config-file="${kubelet_config_file}"  --test-suite="${test_suite}" \
    "${timeout_arg}" \
    2>&1 | tee -i "${artifacts}/build-log.txt"
  exit $?

elif [ "${remote}" = true ] && [ "${remote_mode}" = ssh ] ; then
  hosts=${HOSTS:-""}
  test_suite=${TEST_SUITE:-"default"}
  if [[ -n "${TIMEOUT:-}" ]] ; then
    timeout_arg="--test-timeout=${TIMEOUT}"
  fi

  # Use cluster.local as default dns-domain
  test_args='--dns-domain="'${KUBE_DNS_DOMAIN:-cluster.local}'" '${test_args}
  test_args='--kubelet-flags="--cluster-domain='${KUBE_DNS_DOMAIN:-cluster.local}'" '${test_args}

  # Invoke the runner
  go run test/e2e_node/runner/remote/run_remote.go  --mode="ssh" --vmodule=*=4 \
    --hosts="${hosts}" --results-dir="${artifacts}" --ginkgo-flags="${ginkgoflags}" \
    --test_args="${test_args}" --system-spec-name="${system_spec_name}" \
    --runtime-config="${runtime_config}" \
    --ssh-user="${ssh_user}" --ssh-key="${ssh_key}" --ssh-options="${ssh_options}" \
    --extra-envs="${extra_envs}" --test-suite="${test_suite}" \
    "${timeout_arg}" \
    2>&1 | tee -i "${artifacts}/build-log.txt"
  exit $?

else
  # Refresh sudo credentials if needed
  if ping -c 1 -q metadata.google.internal &> /dev/null; then
    echo 'Running on GCE, not asking for sudo credentials'
  elif ping -c 1 -q 169.254.169.254 &> /dev/null; then
    echo 'Running on AWS, not asking for sudo credentials'
  elif sudo --non-interactive "$(which bash)" -c true 2> /dev/null; then
    # if we can run bash without a password, it's a pretty safe bet that either
    # we can run any command without a password, or that sudo credentials
    # are already cached - and they've just been re-cached
    echo 'No need to refresh sudo credentials'
  else
    echo 'Updating sudo credentials'
    sudo -v || exit 1
  fi


  # Use cluster.local as default dns-domain
  test_args='--dns-domain="'${KUBE_DNS_DOMAIN:-cluster.local}'" '${test_args}
  test_args='--kubelet-flags="--cluster-domain='${KUBE_DNS_DOMAIN:-cluster.local}'" '${test_args}
  # Test using the host the script was run on
  # Provided for backwards compatibility
  go run test/e2e_node/runner/local/run_local.go \
    --debug-tool="${debug_tool}" \
    --system-spec-name="${system_spec_name}" --extra-envs="${extra_envs}" \
    --ginkgo-flags="${ginkgoflags}" \
    --test-flags="--v 4 --report-dir=${artifacts} --node-name $(hostname) ${test_args}" \
    --runtime-config="${runtime_config}" \
    --kubelet-config-file="${kubelet_config_file}" \
    --build-dependencies=true 2>&1 | tee -i "${artifacts}/build-log.txt"
  exit $?
fi
