#!/usr/bin/env bash
# Copyright 2014, 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.
#
# (c) 2014, Kevin Carter <kevin.carter@rackspace.com>

## Shell Opts ----------------------------------------------------------------
set -e -u -x


## Vars ----------------------------------------------------------------------
export HTTP_PROXY=${HTTP_PROXY:-""}
export HTTPS_PROXY=${HTTPS_PROXY:-""}
# The Ansible version used for testing
export ANSIBLE_PACKAGE=${ANSIBLE_PACKAGE:-"ansible==2.5.8"}
export ANSIBLE_ROLE_FILE=${ANSIBLE_ROLE_FILE:-"ansible-role-requirements.yml"}
export SSH_DIR=${SSH_DIR:-"/root/.ssh"}
export DEBIAN_FRONTEND=${DEBIAN_FRONTEND:-"noninteractive"}

# Use pip opts to add options to the pip install command.
# This can be used to tell it which index to use, etc.
export PIP_OPTS=${PIP_OPTS:-""}

# Set the role fetch mode to any option [galaxy, git-clone]
export ANSIBLE_ROLE_FETCH_MODE=${ANSIBLE_ROLE_FETCH_MODE:-git-clone}

export OSA_WRAPPER_BIN="${OSA_WRAPPER_BIN:-scripts/openstack-ansible.sh}"

# This script should be executed from the root directory of the cloned repo
cd "$(dirname "${0}")/.."


## Functions -----------------------------------------------------------------
info_block "Checking for required libraries." 2> /dev/null ||
    source scripts/scripts-library.sh


## Main ----------------------------------------------------------------------
info_block "Bootstrapping System with Ansible"

# Store the clone repo root location
export OSA_CLONE_DIR="$(pwd)"

# Set the variable to the role file to be the absolute path
ANSIBLE_ROLE_FILE="$(readlink -f "${ANSIBLE_ROLE_FILE}")"
OSA_INVENTORY_PATH="$(readlink -f inventory)"
OSA_PLAYBOOK_PATH="$(readlink -f playbooks)"

# Create the ssh dir if needed
ssh_key_create

# Determine the distribution which the host is running on
determine_distro

# Prefer dnf over yum for CentOS.
which dnf &>/dev/null && RHT_PKG_MGR='dnf' || RHT_PKG_MGR='yum'

# Install the base packages
case ${DISTRO_ID} in
    centos|rhel)
        $RHT_PKG_MGR -y install \
          git curl autoconf gcc gcc-c++ nc \
          python2 python2-devel \
          openssl-devel libffi-devel \
          libselinux-python python-virtualenv
        ;;
    ubuntu)
        apt-get update
        DEBIAN_FRONTEND=noninteractive apt-get -y install \
          git-core curl gcc netcat \
          python-minimal python-dev \
          python3 python3-dev \
          libssl-dev libffi-dev \
          python-apt python3-apt \
          python-virtualenv
        ;;
    opensuse)
        zypper -n install -l git-core curl autoconf gcc gcc-c++ \
            netcat-openbsd python python-xml python-devel gcc \
            libffi-devel libopenssl-devel python-virtualenv
        # Leap ships with python3.4 which is not supported by ansible and as
        # such we are using python2
        # See https://github.com/ansible/ansible/issues/24180
        PYTHON_EXEC_PATH="/usr/bin/python2"
        ;;
esac

# Ensure that our shell knows about the new virtualenv
hash -r virtualenv

# Ensure we use the HTTPS/HTTP proxy with pip if it is specified
if [ -n "$HTTPS_PROXY" ]; then
  PIP_OPTS+="--proxy $HTTPS_PROXY"

elif [ -n "$HTTP_PROXY" ]; then
  PIP_OPTS+="--proxy $HTTP_PROXY"
fi

# Force using python2. When python3 and python2 dual stack is supported uncomment the following:
#PYTHON_EXEC_PATH="${PYTHON_EXEC_PATH:-$(which python3 || which python2 || which python)}"
PYTHON_EXEC_PATH="${PYTHON_EXEC_PATH:-$(which python2 || which python)}"
PYTHON_VERSION="$($PYTHON_EXEC_PATH -c 'import sys; print(".".join(map(str, sys.version_info[:3])))')"

# Use https when Python with native SNI support is available
UPPER_CONSTRAINTS_PROTO=$([ "$PYTHON_VERSION" == $(echo -e "$PYTHON_VERSION\n2.7.9" | sort -V | tail -1) ] && echo "https" || echo "http")

# Set the location of the constraints to use for all pip installations
export UPPER_CONSTRAINTS_FILE=${UPPER_CONSTRAINTS_FILE:-"$UPPER_CONSTRAINTS_PROTO://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?id=$(awk '/requirements_git_install_branch:/ {print $2}' playbooks/defaults/repo_packages/openstack_services.yml)"}

# All distros have a python-virtualenv > 13.
# - Centos 7 has 15.1, which holds pip 9.0.1, setuptools 28.8, wheel 0.29
#   See also: http://mirror.centos.org/centos/7/os/x86_64/Packages/
# - openSUSE 42.3 has 13.1.2, which holds pip 7.1.2, setuptools 18.2, wheel 0.24.
#   See also: https://build.opensuse.org/package/show/openSUSE%3ALeap%3A42.3/python-virtualenv
# - Ubuntu Xenial has 15.0.1, holding pip 8.1.1, setuptools 20.3, wheel 0.29
#   See also: https://packages.ubuntu.com/xenial/python-virtualenv

virtualenv --python=${PYTHON_EXEC_PATH} --clear /opt/ansible-runtime

# The vars used to prepare the Ansible runtime venv
PIP_COMMAND="/opt/ansible-runtime/bin/pip"
PIP_OPTS+=" --constraint global-requirement-pins.txt"
PIP_OPTS+=" --constraint ${UPPER_CONSTRAINTS_FILE}"

# When executing the installation, we want to specify all our options on the CLI,
# making sure to completely ignore any config already on the host. This is to
# prevent the repo server's extra constraints being applied, which include
# a different version of Ansible to the one we want to install. As such, we
# use --isolated so that the config file is ignored.

# Upgrade pip setuptools and wheel to the appropriate version
${PIP_COMMAND} install --isolated ${PIP_OPTS} --upgrade pip setuptools wheel

# Install ansible and the other required packages
${PIP_COMMAND} install --isolated ${PIP_OPTS} -r requirements.txt ${ANSIBLE_PACKAGE}

# Install our osa_toolkit code from the current checkout
$PIP_COMMAND install -e .

# Add SELinux support to the venv
if [ -d "/usr/lib64/python2.7/site-packages/selinux/" ]; then
  rsync -avX /usr/lib64/python2.7/site-packages/selinux/ /opt/ansible-runtime/lib64/python2.7/selinux/
fi

# Ensure that Ansible binaries run from the venv
pushd /opt/ansible-runtime/bin
  for ansible_bin in $(ls -1 ansible*); do
    if [ "${ansible_bin}" == "ansible" ] || [ "${ansible_bin}" == "ansible-playbook" ]; then

      # For the 'ansible' and 'ansible-playbook' commands we want to use our wrapper
      ln -sf /usr/local/bin/openstack-ansible /usr/local/bin/${ansible_bin}

    else

      # For any other commands, we want to link directly to the binary
      ln -sf /opt/ansible-runtime/bin/${ansible_bin} /usr/local/bin/${ansible_bin}

    fi
  done
popd

# Write the OSA Ansible rc file
sed "s|OSA_INVENTORY_PATH|${OSA_INVENTORY_PATH}|g" scripts/openstack-ansible.rc > /usr/local/bin/openstack-ansible.rc
sed -i "s|OSA_PLAYBOOK_PATH|${OSA_PLAYBOOK_PATH}|g" /usr/local/bin/openstack-ansible.rc

# Create openstack ansible wrapper tool
cp -v ${OSA_WRAPPER_BIN} /usr/local/bin/openstack-ansible

# Ensure wrapper tool is executable
chmod +x /usr/local/bin/openstack-ansible

echo "openstack-ansible wrapper created."

# If the Ansible plugins are in the old location remove them.
[[ -d "/etc/ansible/plugins" ]] && rm -rf "/etc/ansible/plugins"

# Update dependent roles
if [ -f "${ANSIBLE_ROLE_FILE}" ]; then
  if [[ "${ANSIBLE_ROLE_FETCH_MODE}" == 'galaxy' ]];then
    # Pull all required roles.
    ansible-galaxy install --role-file="${ANSIBLE_ROLE_FILE}" \
                           --force
  elif [[ "${ANSIBLE_ROLE_FETCH_MODE}" == 'git-clone' ]];then
    # NOTE(cloudnull): When bootstrapping we don't want ansible to interact
    #                  with our plugins by default. This change will force
    #                  ansible to ignore our plugins during this process.
    export ANSIBLE_LIBRARY="/dev/null"
    export ANSIBLE_LOOKUP_PLUGINS="/dev/null"
    export ANSIBLE_FILTER_PLUGINS="/dev/null"
    export ANSIBLE_ACTION_PLUGINS="/dev/null"
    export ANSIBLE_CALLBACK_PLUGINS="/dev/null"
    export ANSIBLE_CALLBACK_WHITELIST="/dev/null"
    export ANSIBLE_TEST_PLUGINS="/dev/null"
    export ANSIBLE_VARS_PLUGINS="/dev/null"
    export ANSIBLE_STRATEGY_PLUGINS="/dev/null"
    export ANSIBLE_CONFIG="none-ansible.cfg"

    pushd scripts
      /opt/ansible-runtime/bin/ansible-playbook get-ansible-role-requirements.yml \
                       -e role_file="${ANSIBLE_ROLE_FILE}"
    popd

    unset ANSIBLE_LIBRARY
    unset ANSIBLE_LOOKUP_PLUGINS
    unset ANSIBLE_FILTER_PLUGINS
    unset ANSIBLE_ACTION_PLUGINS
    unset ANSIBLE_CALLBACK_PLUGINS
    unset ANSIBLE_CALLBACK_WHITELIST
    unset ANSIBLE_TEST_PLUGINS
    unset ANSIBLE_VARS_PLUGINS
    unset ANSIBLE_STRATEGY_PLUGINS
    unset ANSIBLE_CONFIG
  else
    echo "Please set the ANSIBLE_ROLE_FETCH_MODE to either of the following options ['galaxy', 'git-clone']"
    exit 99
  fi
fi

echo "System is bootstrapped and ready for use."