#!/bin/bash
#
# The 'run' performs a simple test that verifies that STI image.
# The main focus here is to exercise the STI scripts.
#
# IMAGE_NAME specifies a name of the candidate image used for testing.
# The image has to be available before this script is executed.
#
# EXPRESS_REVISION specifies which express.js branch or tag should be tested;
# by default it uses the latest released version as reported by
# `npm show express version`.

THISDIR=$(dirname ${BASH_SOURCE[0]})

source "${THISDIR}/test-lib.sh"

test -n $IMAGE_NAME \
  -a -n $VERSION
readonly EXPRESS_REVISION="${EXPRESS_REVISION:-$(docker run --rm "${IMAGE_NAME}" -- npm show express version)}"

test_dir="$(readlink -f $(dirname ${BASH_SOURCE[0]}))"
image_dir="$(readlink -f ${test_dir}/..)"
cid_file=$(mktemp -u --suffix=.cid)

# Since we built the candidate image locally, we don't want S2I attempt to pull
# it from Docker hub
s2i_args="--pull-policy=never "

# TODO: This should be part of the image metadata
test_port=8080

# Common git configuration
readonly -A gitconfig=(
  [user.name]="builder"
  [user.email]="build@localhost"
  [commit.gpgsign]="false"
)

info() {
  echo -e "\n\e[1m[INFO] $@...\e[0m\n"
}

if [ "$DEBUG" != "" ]; then
  set -x
fi

image_exists() {
  docker inspect $1 &>/dev/null
}

container_exists() {
  image_exists $(cat $cid_file)
}

container_ip() {
  docker inspect --format="{{ .NetworkSettings.IPAddress }}" $(cat $cid_file)
}

container_logs() {
  docker logs $(cat $cid_file)
}

run_s2i_build() {
  ct_s2i_build_as_df file://${test_dir}/test-app ${IMAGE_NAME} ${IMAGE_NAME}-testapp ${s2i_args} $(ct_build_s2i_npm_variables) $1
}

run_s2i_build_proxy() {
  ct_s2i_build_as_df file://${test_dir}/test-hw ${IMAGE_NAME} ${IMAGE_NAME}-testhw ${s2i_args} $(ct_build_s2i_npm_variables) -e HTTP_PROXY=$1 -e http_proxy=$1 -e HTTPS_PROXY=$2 -e https_proxy=$2
}

run_s2i_build_express() {
  ct_s2i_build_as_df \
    "file://${test_dir}/express.js" "${IMAGE_NAME}" "${IMAGE_NAME}-express" \
    ${s2i_args} \
    $(ct_build_s2i_npm_variables) -e NODE_ENV=development
}

prepare_dummy_git_repo() {
  git init
  for key in "${!gitconfig[@]}"; do
    git config --local "$key" "${gitconfig[$key]}"
  done
  git add --all
  git commit -m "Sample commit"
}

prepare_express_repo() {
  git clone \
    --config advice.detachedHead="false" \
    --branch "${EXPRESS_REVISION}" --depth 1 \
    'https://github.com/expressjs/express.git' "$1"
  pushd "$1" >/dev/null || return
  for key in "${!gitconfig[@]}"; do
    git config --local "$key" "${gitconfig[$key]}"
  done
  popd "$1" >/dev/null || return
}

prepare() {
  if ! image_exists ${IMAGE_NAME}; then
    echo "ERROR: The image ${IMAGE_NAME} must exist before this script is executed."
    exit 1
  fi

  case "$1" in
    # TODO: STI build require the application is a valid 'GIT' repository, we
    # should remove this restriction in the future when a file:// is used.
    app|hw)
      pushd "${test_dir}/test-${1}" >/dev/null
      prepare_dummy_git_repo
      popd >/dev/null
      ;;
    express)
      prepare_express_repo "${test_dir}/express.js"
      ;;
    *)
      echo "Please specify a valid test application"
      exit 1
      ;;
  esac
}

run_test_application() {
    if [[ $1 == app ]]; then
        docker run --user=100001 $(ct_mount_ca_file) --rm --cidfile=${cid_file} $2 ${IMAGE_NAME}-testapp
    elif [[ $1 == hw ]]; then
        docker run --user=100001 $(ct_mount_ca_file) --rm --cidfile=${cid_file} $2 ${IMAGE_NAME}-testhw
    else
        echo "No such test application"
        exit 1
    fi
}

run_express_test_suite() {
  docker run --user=100001 $(ct_mount_ca_file) --rm --cidfile=${cid_file} ${IMAGE_NAME}-express npm test
}

kill_test_application() {
	docker kill $(cat $cid_file)
	rm $cid_file
}

cleanup() {
  if [ -f $cid_file ]; then
      if container_exists; then
          docker stop $(cat $cid_file)
      fi
  fi

  for image in "${IMAGE_NAME}"-{test{app,hw},express}; do
    image_exists "$image" || continue
    docker rmi -f "$image"
  done

  rm -rf ${test_dir}/test-app/.git
  rm -rf ${test_dir}/test-hw/.git
  rm -rf "${test_dir}/express.js"
}

check_result() {
  local result="$1"
  if [[ "$result" != "0" ]]; then
    echo "S2I image '${IMAGE_NAME}' test FAILED (exit code: ${result})"
    cleanup
    exit $result
  fi
}

wait_for_cid() {
  local max_attempts=20
  local sleep_time=1
  local attempt=1
  local result=1
  while [ $attempt -le $max_attempts ]; do
    [ -f $cid_file ] && [ -s $cid_file ] && break
    echo "Waiting for container start..."
    attempt=$(( $attempt + 1 ))
    sleep $sleep_time
  done
}

test_s2i_usage() {
  echo "Testing 's2i usage'..."
  ct_s2i_usage ${IMAGE_NAME} ${s2i_args} &>/dev/null
}

test_docker_run_usage() {
  echo "Testing 'docker run' usage..."
  docker run --rm ${IMAGE_NAME} &>/dev/null
}

test_connection() {
  echo "Testing HTTP connection..."
  local max_attempts=10
  local sleep_time=1
  local attempt=1
  local result=1
  while [ $attempt -le $max_attempts ]; do
    echo "Sending GET request to http://$(container_ip):${test_port}/"
    response_code=$(curl -s -w %{http_code} -o /dev/null http://$(container_ip):${test_port}/)
    status=$?
    if [ $status -eq 0 ]; then
      if [ $response_code -eq 200 ]; then
        result=0
      fi
      break
    fi
    attempt=$(( $attempt + 1 ))
    sleep $sleep_time
  done
  return $result
}

test_scl_usage() {
  local run_cmd="$1"
  local expected="$2"

  echo "Testing the image SCL enable ..."
  out=$(docker run --rm ${IMAGE_NAME} /bin/bash -c "${run_cmd}")
  if ! echo "${out}" | grep -q "${expected}"; then
    echo "ERROR[/bin/bash -c "${run_cmd}"] Expected '${expected}', got '${out}'"
    return 1
  fi
  out=$(docker exec $(cat ${cid_file}) /bin/bash -c "${run_cmd}" 2>&1)
  if ! echo "${out}" | grep -q "${expected}"; then
    echo "ERROR[exec /bin/bash -c "${run_cmd}"] Expected '${expected}', got '${out}'"
    return 1
  fi
  out=$(docker exec $(cat ${cid_file}) /bin/sh -ic "${run_cmd}" 2>&1)
  if ! echo "${out}" | grep -q "${expected}"; then
    echo "ERROR[exec /bin/sh -ic "${run_cmd}"] Expected '${expected}', got '${out}'"
    return 1
  fi
}

validate_default_value() {
  local label=$1

  IFS=':' read -a label_vals <<< $(docker inspect -f "{{index .Config.Labels \"$label\"}}" ${IMAGE_NAME})
  label_var=${label_vals[0]}
  default_label_val=${label_vals[1]}

  actual_label_val=$(docker run --rm $IMAGE_NAME /bin/bash -c "echo $"$label_var)

  if [ "$actual_label_val" != "$default_label_val" ]; then
    echo "ERROR default value for $label with environment variable $label_var; Expected $default_label_val, got $actual_label_val"
    return 1
  fi
}

# Gets the NODE_ENV environment variable from the container.
get_node_env_from_container() {
  local dev_mode="$1"
  local node_env="$2"

  IFS=':' read -a label_val <<< $(docker inspect -f '{{index .Config.Labels "com.redhat.dev-mode"}}' $IMAGE_NAME)
  dev_mode_label_var="${label_val[0]}"

  echo $(docker run --rm --env $dev_mode_label_var=$dev_mode --env NODE_ENV=$node_env $IMAGE_NAME /bin/bash -c 'echo "$NODE_ENV"')
}

# Ensures that a docker container run with '--env NODE_ENV=$current_val' produces a NODE_ENV value of $expected when
# DEV_MODE=dev_mode.
validate_node_env() {
  local current_val="$1"
  local dev_mode_val="$2"
  local expected="$3"

  actual=$(get_node_env_from_container "$dev_mode_val" "$current_val")
  if [ "$actual" != "$expected" ]; then
    echo "ERROR default value for NODE_ENV when development mode is $dev_mode_val; should be $expected but is $actual"
    return 1
  fi
}

test_dev_mode() {
  local app=$1
  local dev_mode=$2
  local node_env=$3

  echo "Testing $app DEV_MODE=$dev_mode NODE_ENV=$node_env"

  run_test_application $app "-e DEV_MODE=$dev_mode" &
  wait_for_cid

  test_connection
  check_result $?

  logs=$(container_logs)
  echo ${logs} | grep -q DEV_MODE=$dev_mode
  check_result $?
  echo ${logs} | grep -q DEBUG_PORT=5858
  check_result $?
  echo ${logs} | grep -q NODE_ENV=$node_env
  check_result $?

  kill_test_application
}

test_incremental_build() {
  npm_variables=$(ct_build_s2i_npm_variables)
  build_log1=$(ct_s2i_build_as_df file://${test_dir}/test-incremental ${IMAGE_NAME} ${IMAGE_NAME}-testapp ${s2i_args} ${npm_variables})
  check_result $?
  build_log2=$(ct_s2i_build_as_df file://${test_dir}/test-incremental ${IMAGE_NAME} ${IMAGE_NAME}-testapp ${s2i_args} ${npm_variables} --incremental)
  check_result $?
  if [ "$VERSION" == "6" ]; then
      # Different npm output for version 6
      if echo "$build_log2" | grep -e "\-\- yarn@[0-9\.]*"; then
          echo "ERROR Incremental build failed: yarn package is getting installed in incremental build"
          check_result 1
      fi
  else
      first=$(echo "$build_log1" | grep -o -e "added [0-9]* packages" | awk '{ print $2 }')
      second=$(echo "$build_log2" | grep -o -e "added [0-9]* packages" | awk '{ print $2 }')
      if [ "$first" == "$second" ]; then
          echo "ERROR Incremental build failed: both builds installed $first packages"
          check_result 1
      fi
  fi

}

# Build the application image twice to ensure the 'save-artifacts' and
# 'restore-artifacts' scripts are working properly
prepare app
echo "Testing the production image build"
run_s2i_build
check_result $?

# Verify the 'usage' script is working properly when running the base image with 's2i usage ...'
test_s2i_usage
check_result $?

# Verify the 'usage' script is working properly when running the base image with 'docker run ...'
test_docker_run_usage
check_result $?

# Verify that the HTTP connection can be established to test application container
run_test_application app &

# Wait for the container to write it's CID file
wait_for_cid

test_scl_usage "node --version" "v$VERSION."
check_result $?

test_connection
check_result $?

# Test that the development dependencies (nodemon) have been removed (npm prune)
devdep=$(docker run --rm ${IMAGE_NAME}-testapp /bin/bash -c "! test -d ~/node_modules/nodemon")
check_result $?

# Test that the npm cache has been cleared
devdep=$(docker run --rm ${IMAGE_NAME}-testapp /bin/bash -c "! test -d \$(npm config get cache)")
check_result $?

# Test that the npm tmp has been cleared
devdep=$(docker run --rm ${IMAGE_NAME}-testapp /bin/bash -c "! ls \$(npm config get tmp)/npm-* 2>/dev/null")
check_result $?

kill_test_application

test_dev_mode app false production
test_dev_mode app true development

echo "Testing the development image build: s2i build -e \"NODE_ENV=development\")"
run_s2i_build "-e NODE_ENV=development"
check_result $?

# Verify that the HTTP connection can be established to test application container
run_test_application app &
wait_for_cid

test_connection
check_result $?

# Test that the development dependencies (nodemon) have NOT been removed
devdep=$(docker run --rm ${IMAGE_NAME}-testapp /bin/bash -c "test -d ~/node_modules/nodemon")
check_result $?

# Test that the npm cache has NOT been cleared
devdep=$(docker run --rm ${IMAGE_NAME}-testapp /bin/bash -c "test -d \$(npm config get cache)")
check_result $?

kill_test_application

test_dev_mode app true development
test_dev_mode app false development

echo "Testing the development image build: s2i build -e \"DEV_MODE=true\")"
run_s2i_build "-e DEV_MODE=true"
check_result $?

# Verify that the HTTP connection can be established to test application container
run_test_application app &
wait_for_cid

test_connection
check_result $?

# Test that the development dependencies (nodemon) have NOT been removed
devdep=$(docker run --rm ${IMAGE_NAME}-testapp /bin/bash -c "test -d ~/node_modules/nodemon")
check_result $?

# Test that the npm cache has NOT been cleared
devdep=$(docker run --rm ${IMAGE_NAME}-testapp /bin/bash -c "test -d \$(npm config get cache)")
check_result $?

kill_test_application

test_dev_mode app true development
test_dev_mode app false production

echo "Testing proxy safe logging..."
prepare hw
run_s2i_build_proxy http://user.password@0.0.0.0:8000 https://user.password@0.0.0.0:8000 > /tmp/build-log 2>&1
if [[ $(grep redacted /tmp/build-log | wc -l) -eq 4 ]]; then
    grep redacted /tmp/build-log
    check_result 0
else
    echo "Some proxy log-in credentials were left in log file"
    grep Setting /tmp/build-log
    check_result 1
fi

run_test_application hw &
wait_for_cid
kill_test_application

echo "Testing incremental build"
test_incremental_build

echo "Testing npm availability"
ct_npm_works
check_result $?

echo "Running express.js test suite"
prepare express
run_s2i_build_express; check_result $?
run_express_test_suite; check_result $?

echo "Success!"
cleanup