#!/bin/bash

set -eu
set -o pipefail

# Library of functions for the kayobe development environment.

# Configuration

function config_defaults {
    # Set default values for kayobe development configuration.

    # Try to detect if we are running in a vagrant VM.
    if [[ -e /vagrant ]]; then
        KAYOBE_SOURCE_PATH_DEFAULT=/vagrant
    else
        KAYOBE_SOURCE_PATH_DEFAULT="$(pwd)"
    fi

    # Path to the kayobe source code repository. Typically this will be the
    # Vagrant shared directory.
    export KAYOBE_SOURCE_PATH="${KAYOBE_SOURCE_PATH:-$KAYOBE_SOURCE_PATH_DEFAULT}"

    # Path to the kayobe-config repository checkout.
    export KAYOBE_CONFIG_SOURCE_PATH="${KAYOBE_CONFIG_SOURCE_PATH:-${KAYOBE_SOURCE_PATH}/config/src/kayobe-config}"

    # Path to the kayobe virtual environment.
    export KAYOBE_VENV_PATH="${KAYOBE_VENV_PATH:-${HOME}/kayobe-venv}"

    # Whether to provision a VM for the seed host.
    export KAYOBE_SEED_VM_PROVISION=${KAYOBE_SEED_VM_PROVISION:-1}

    # Whether to build container images for the seed services. If 0, they will
    # be pulled.
    export KAYOBE_SEED_CONTAINER_IMAGE_BUILD=${KAYOBE_SEED_CONTAINER_IMAGE_BUILD:-0}

    # Whether to build container images for the overcloud services. If 0, they
    # will be pulled.
    export KAYOBE_OVERCLOUD_CONTAINER_IMAGE_BUILD=${KAYOBE_OVERCLOUD_CONTAINER_IMAGE_BUILD:-0}

    # Additional arguments to pass to kayobe commands.
    export KAYOBE_EXTRA_ARGS=${KAYOBE_EXTRA_ARGS:-}
}

function config_set {
    # Source the configuration file, config.sh

    PARENT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

    source "${PARENT}/config.sh"
}

function config_check {
    # Check the configuration environment variables.

    if [[ ! -e "$KAYOBE_CONFIG_SOURCE_PATH" ]]; then
        if [[ ${KAYOBE_CONFIG_REQUIRED:-1} -eq 1 ]]; then
            echo "Kayobe configuration path $KAYOBE_CONFIG_SOURCE_PATH does not exist"
            return 1
        fi
    fi

    if [[ ! -e "$KAYOBE_SOURCE_PATH" ]]; then
        echo "Kayobe source path $KAYOBE_SOURCE_PATH does not exist"
        return 1
    fi
}

function config_init {
    config_defaults
    config_set
    config_check
}

# Installation

function install_dependencies {
    echo "Installing package dependencies for kayobe"
    if [[ -e /etc/centos-release ]]; then
        sudo yum -y install gcc git vim python-virtualenv
    else
        sudo apt install -y python-dev python-virtualenv gcc git
    fi
}

function install_venv {
    local venv_parent="$(dirname ${KAYOBE_VENV_PATH})"
    if [[ ! -d "$venv_parent" ]]; then
        mkdir -p "$venv_parent"
    fi
    if [[ ! -f "${KAYOBE_VENV_PATH}/bin/activate" ]]; then
        echo "Creating kayobe virtual environment in ${KAYOBE_VENV_PATH}"
        virtualenv "${KAYOBE_VENV_PATH}"
        # NOTE: Virtualenv's activate and deactivate scripts reference an
        # unbound variable.
        set +u
        source "${KAYOBE_VENV_PATH}/bin/activate"
        pip install -U pip
        pip install "${KAYOBE_SOURCE_PATH}"
        deactivate
        set -u
    else
        echo "Using existing kayobe virtual environment in ${KAYOBE_VENV_PATH}"
    fi
}

# Deployment

function is_deploy_image_built_locally {
    ipa_build_images=$(kayobe configuration dump --host controllers[0] --var-name ipa_build_images)
    [[ $ipa_build_images =~ ^true$ ]]
}

function environment_setup {
    # NOTE: Virtualenv's activate script references an unbound variable.
    set +u
    source "${KAYOBE_VENV_PATH}/bin/activate"
    set -u
    source "${KAYOBE_CONFIG_SOURCE_PATH}/kayobe-env"

    cd "${KAYOBE_SOURCE_PATH}"
}

function run_kayobe {
    # Run a kayobe command, including extra arguments provided via
    # $KAYOBE_EXTRA_ARGS.
    kayobe ${KAYOBE_EXTRA_ARGS} $*
}

function seed_hypervisor_deploy {
    # Deploy a seed hypervisor.
    environment_setup

    echo "Bootstrapping the ansible control host"
    run_kayobe control host bootstrap

    echo "Configuring the seed hypervisor"
    run_kayobe seed hypervisor host configure
}

function seed_deploy {
    # Deploy a kayobe seed in a VM.
    environment_setup

    echo "Bootstrapping the ansible control host"
    run_kayobe control host bootstrap

    if [[ ${KAYOBE_SEED_VM_PROVISION} = 1 ]]; then
        echo "Provisioning the seed VM"
        run_kayobe seed vm provision
    fi

    echo "Configuring the seed host"
    run_kayobe seed host configure

    # Note: This must currently be before host configure, because host
    # configure runs kolla-ansible.yml, which validates the presence of the
    # built deploy images.
    if is_deploy_image_built_locally; then
        echo "Building seed deployment images"
        run_kayobe seed deployment image build
    else
        echo "Not building seed deployment images"
    fi

    if [[ ${KAYOBE_SEED_CONTAINER_IMAGE_BUILD} = 1 ]]; then
        echo "Building seed container images"
        run_kayobe seed container image build
    else
        echo "Not pulling seed container images - no such command yet"
        #run_kayobe seed container image pull
    fi

    echo "Deploying containerised seed services"
    run_kayobe seed service deploy
}

function overcloud_deploy {
    # Deploy a kayobe control plane.
    echo "Deploying a kayobe development environment. This consists of a "
    echo "single node OpenStack control plane."

    environment_setup

    echo "Bootstrapping the ansible control host"
    run_kayobe control host bootstrap

    echo "Configuring the controller host"
    run_kayobe overcloud host configure

    # Note: This must currently be before host configure, because host
    # configure runs kolla-ansible.yml, which validates the presence of the
    # built deploy images.
    if is_deploy_image_built_locally; then
        echo "Building overcloud deployment images"
        run_kayobe overcloud deployment image build
    else
        echo "Not building overcloud deployment images"
    fi

    if [[ ${KAYOBE_OVERCLOUD_CONTAINER_IMAGE_BUILD} = 1 ]]; then
        echo "Building overcloud container images"
        run_kayobe overcloud container image build
    else
        echo "Pulling overcloud container images"
        run_kayobe overcloud container image pull
    fi

    echo "Deploying containerised overcloud services"
    run_kayobe overcloud service deploy

    echo "Performing post-deployment configuration"
    source "${KOLLA_CONFIG_PATH:-/etc/kolla}/admin-openrc.sh"
    run_kayobe overcloud post configure

    echo "Control plane deployment complete"
}