#!/usr/bin/env bash

# Copyright 2016, Rackspace US, Inc.
#
# 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.

# WARNING:
# This file is use by all OpenStack-Ansible roles for testing purposes.
# Any changes here will affect all OpenStack-Ansible role repositories
# with immediate effect.

# PURPOSE:
# This script executes a test Ansible playbook for the purpose of
# functionally testing the role. It supports a convergence test,
# check mode and an idempotence test.

## Shell Opts ----------------------------------------------------------------

set -e

## Vars ----------------------------------------------------------------------

export TESTING_HOME=${TESTING_HOME:-$HOME}
export WORKING_DIR=${WORKING_DIR:-$(pwd)}
export ROLE_NAME=${ROLE_NAME:-''}

export ANSIBLE_CALLBACK_WHITELIST="profile_tasks"
export ANSIBLE_OVERRIDES=${ANSIBLE_OVERRIDES:-$WORKING_DIR/tests/$ROLE_NAME-overrides.yml}
export ANSIBLE_PARAMETERS=${ANSIBLE_PARAMETERS:-""}
export TEST_PLAYBOOK=${TEST_PLAYBOOK:-$WORKING_DIR/tests/test.yml}
export TEST_CHECK_MODE=${TEST_CHECK_MODE:-false}
export TEST_IDEMPOTENCE=${TEST_IDEMPOTENCE:-false}

export COMMON_TESTS_PATH="${WORKING_DIR}/tests/common"

echo "ANSIBLE_OVERRIDES: ${ANSIBLE_OVERRIDES}"
echo "ANSIBLE_PARAMETERS: ${ANSIBLE_PARAMETERS}"
echo "TEST_PLAYBOOK: ${TEST_PLAYBOOK}"
echo "TEST_CHECK_MODE: ${TEST_CHECK_MODE}"
echo "TEST_IDEMPOTENCE: ${TEST_IDEMPOTENCE}"

## Functions -----------------------------------------------------------------

function set_ansible_parameters {

  if [ -f "${ANSIBLE_OVERRIDES}" ]; then
    ANSIBLE_CLI_PARAMETERS="${ANSIBLE_PARAMETERS} -e @${ANSIBLE_OVERRIDES}"
  else
    ANSIBLE_CLI_PARAMETERS="${ANSIBLE_PARAMETERS}"
  fi

}

function setup_ara {

  # Don't do anything if ARA has already been set up
  [[ -L "${ANSIBLE_PLUGIN_DIR}/callback/ara" ]] && return 0

  # Install ARA from source if running in ARA gate, otherwise install from PyPi
  if [[ -d "${TESTING_HOME}/git/openstack/ara" ]]; then
    pip install "${TESTING_HOME}/git/openstack/ara"
  elif [[ "${ZUUL_PROJECT}" == "openstack/ara" ]]; then
    pip install "${WORKING_DIR}"
  else
    pip install ara
  fi

  # Dynamically figure out the location of ARA (ex: py2 vs py3)
  ara_location=$(python -c "import os,ara; print(os.path.dirname(ara.__file__))")

  echo "Linking ${ANSIBLE_PLUGIN_DIR}/callback/ara to ${ara_location}/plugins/callbacks/"
  mkdir -p "${ANSIBLE_PLUGIN_DIR}/callback/ara"
  ln -sf "${ara_location}/plugins/callbacks" "${ANSIBLE_PLUGIN_DIR}/callback/ara/"

}

function execute_ansible_playbook {

  CMD_TO_EXECUTE="ansible-playbook ${TEST_PLAYBOOK} $@ ${ANSIBLE_CLI_PARAMETERS}"
  echo "Executing: ${CMD_TO_EXECUTE}"
  echo "With:"
  echo "    ANSIBLE_INVENTORY: ${ANSIBLE_INVENTORY}"
  echo "    ANSIBLE_LOG_PATH: ${ANSIBLE_LOG_PATH}"

  ${CMD_TO_EXECUTE}

}

function gate_job_exit_tasks {
  source "${COMMON_TESTS_PATH}/test-log-collect.sh"
}

## Main ----------------------------------------------------------------------

# NOTE(mhayden): CentOS images in the gate have several slow mirrors enabled
# by default. This step ensures that only the base, epel, and updates
# repositories are enabled.
if [[ -x /usr/bin/yum-config-manager ]] && [[ -e /etc/centos-release ]]; then
  sudo yum-config-manager --disable \*
  sudo yum-config-manager --enable base
  sudo yum-config-manager --enable epel
  sudo yum-config-manager --enable updates
fi

# Ensure that the Ansible environment is properly prepared
source "${COMMON_TESTS_PATH}/test-ansible-env-prep.sh"
setup_ara

# Set gate job exit traps, this is run regardless of exit state when the job finishes.
trap gate_job_exit_tasks EXIT

# Prepare the extra CLI parameters used in each execution
set_ansible_parameters

# If the test for check mode is enabled, then execute it
if [ "${TEST_CHECK_MODE}" == "true" ]; then

  # Set the path for the output log
  export ANSIBLE_LOG_PATH="${ANSIBLE_LOG_DIR}/ansible-check.log"

  # Execute the test playbook in check mode
  execute_ansible_playbook --check

fi

# Set the path for the output log
export ANSIBLE_LOG_PATH="${ANSIBLE_LOG_DIR}/ansible-execute.log"

# Execute the test playbook
execute_ansible_playbook

# If the idempotence test is enabled, then execute the
# playbook again and verify that nothing changed/failed
# in the output log.

if [ "${TEST_IDEMPOTENCE}" == "true" ]; then

  # Set the path for the output log
  export ANSIBLE_LOG_PATH="${ANSIBLE_LOG_DIR}/ansible-idempotence.log"

  # Execute the test playbook
  execute_ansible_playbook

  # Check the output log for changed/failed tasks
  if grep -q "changed=0.*failed=0" ${ANSIBLE_LOG_PATH}; then
    echo "Idempotence test: pass"
  else
    echo "Idempotence test: fail"
    exit 1
  fi

fi