#!/bin/bash

set -euo pipefail

source /etc/os-release

# Fedora 31's composer-cli doesn't support doing image uploads.

if [[ $ID == fedora ]] && [[ $VERSION_ID == 31 ]]; then

    echo "Fedora 31 does not support image uploads with composer-cli."

    exit 0

fi

# Colorful output.

function greenprint {

    echo -e "\033[1;32m${1}\033[0m"

}

# Apply lorax patch to work around pytoml issues in RHEL 8.x.

# See BZ 1843704 or https://github.com/weldr/lorax/pull/1030 for more details.

if [[ $ID == rhel ]]; then

    sudo sed -r -i 's#toml.load\(args\[3\]\)#toml.load(open(args[3]))#' \

        /usr/lib/python3.6/site-packages/composer/cli/compose.py

    sudo rm -f /usr/lib/python3.6/site-packages/composer/cli/compose.pyc

fi

# We need jq for parsing composer-cli output.

if ! hash jq; then

    greenprint "Installing jq"

    sudo dnf -qy install jq

fi

# We need awscli to talk to AWS.

if ! hash aws; then

    greenprint "Installing awscli"

    sudo dnf -y install unzip

    pushd /tmp

        curl -Ls --retry 5 --output awscliv2.zip \

            https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip

        unzip awscliv2.zip > /dev/null

        sudo ./aws/install > /dev/null

        aws --version

    popd

fi

TEST_UUID=$(uuidgen)

IMAGE_KEY=osbuild-composer-aws-test-${TEST_UUID}

AWS_CMD="aws --region $AWS_REGION --output json --color on"

# Jenkins sets WORKSPACE to the job workspace, but if this script runs

# outside of Jenkins, we can set up a temporary directory instead.

if [[ ${WORKSPACE:-empty} == empty ]]; then

    WORKSPACE=$(mktemp -d)

fi

# Set up temporary files.

TEMPDIR=$(mktemp -d)

AWS_CONFIG=${TEMPDIR}/aws.toml

BLUEPRINT_FILE=${TEMPDIR}/blueprint.toml

AWS_INSTANCE_JSON=${TEMPDIR}/aws-instance.json

COMPOSE_START=${TEMPDIR}/compose-start-${IMAGE_KEY}.json

COMPOSE_INFO=${TEMPDIR}/compose-info-${IMAGE_KEY}.json

AMI_DATA=${TEMPDIR}/ami-data-${IMAGE_KEY}.json

INSTANCE_DATA=${TEMPDIR}/instance-data-${IMAGE_KEY}.json

INSTANCE_CONSOLE=${TEMPDIR}/instance-console-${IMAGE_KEY}.json

# Check for the smoke test file on the AWS instance that we start.

smoke_test_check () {

    # Ensure the ssh key has restricted permissions.

    SSH_KEY=${WORKSPACE}/test/keyring/id_rsa

    chmod 0600 $SSH_KEY

    SMOKE_TEST=$(ssh -i ${SSH_KEY} redhat@${1} 'cat /etc/smoke-test.txt')

    if [[ $SMOKE_TEST == smoke-test ]]; then

        echo 1

    else

        echo 0

    fi

}

# Get the compose log.

get_compose_log () {

    COMPOSE_ID=$1

    LOG_FILE=${WORKSPACE}/osbuild-${ID}-${VERSION_ID}-aws.log

    # Download the logs.

    sudo composer-cli compose log $COMPOSE_ID | tee $LOG_FILE > /dev/null

}

# Get the compose metadata.

get_compose_metadata () {

    COMPOSE_ID=$1

    METADATA_FILE=${WORKSPACE}/osbuild-${ID}-${VERSION_ID}-aws.json

    # Download the metadata.

    sudo composer-cli compose metadata $COMPOSE_ID > /dev/null

    # Find the tarball and extract it.

    TARBALL=$(basename $(find . -maxdepth 1 -type f -name "*-metadata.tar"))

    tar -xf $TARBALL

    rm -f $TARBALL

    # Move the JSON file into place.

    cat ${COMPOSE_ID}.json | jq -M '.' | tee $METADATA_FILE > /dev/null

}

# Get the console screenshot from the AWS instance.

store_instance_screenshot () {

    INSTANCE_ID=${1}

    LOOP_COUNTER=${2}

    SCREENSHOT_FILE=${WORKSPACE}/console-screenshot-${ID}-${VERSION_ID}-${LOOP_COUNTER}.jpg

    $AWS_CMD ec2 get-console-screenshot --instance-id ${1} > $INSTANCE_CONSOLE

    jq -r '.ImageData' $INSTANCE_CONSOLE | base64 -d - > $SCREENSHOT_FILE

}

# Write an AWS TOML file

tee $AWS_CONFIG > /dev/null << EOF

provider = "aws"

[settings]

accessKeyID = "${AWS_ACCESS_KEY_ID}"

secretAccessKey = "${AWS_SECRET_ACCESS_KEY}"

bucket = "${AWS_BUCKET}"

region = "${AWS_REGION}"

key = "${IMAGE_KEY}"

EOF

# Write a basic blueprint for our image.

tee $BLUEPRINT_FILE > /dev/null << EOF

name = "bash"

description = "A base system with bash"

version = "0.0.1"

[[packages]]

name = "bash"

[customizations.services]

enabled = ["sshd", "cloud-init", "cloud-init-local", "cloud-config", "cloud-final"]

EOF

# Prepare the blueprint for the compose.

greenprint "📋 Preparing blueprint"

sudo composer-cli blueprints push $BLUEPRINT_FILE

sudo composer-cli blueprints depsolve bash

# Get worker unit file so we can watch the journal.

WORKER_UNIT=$(sudo systemctl list-units | egrep -o "osbuild.*worker.*\.service")

sudo journalctl -af -n 1 -u ${WORKER_UNIT} &

WORKER_JOURNAL_PID=$!

# Start the compose and upload to AWS.

greenprint "🚀 Starting compose"

sudo composer-cli --json compose start bash ami $IMAGE_KEY $AWS_CONFIG | tee $COMPOSE_START

COMPOSE_ID=$(jq -r '.build_id' $COMPOSE_START)

# Wait for the compose to finish.

greenprint "⏱ Waiting for compose to finish: ${COMPOSE_ID}"

while true; do

    sudo composer-cli --json compose info ${COMPOSE_ID} | tee $COMPOSE_INFO > /dev/null

    COMPOSE_STATUS=$(jq -r '.queue_status' $COMPOSE_INFO)

    # Is the compose finished?

    if [[ $COMPOSE_STATUS != RUNNING ]] && [[ $COMPOSE_STATUS != WAITING ]]; then

        break

    fi

    # Wait 30 seconds and try again.

    sleep 30

done

# Capture the compose logs from osbuild.

greenprint "💬 Getting compose log and metadata"

get_compose_log $COMPOSE_ID

get_compose_metadata $COMPOSE_ID

# Did the compose finish with success?

if [[ $COMPOSE_STATUS != FINISHED ]]; then

    echo "Something went wrong with the compose. 😢"

    exit 1

fi

# Find the image that we made in AWS.

greenprint "🔍 Search for created AMI"

$AWS_CMD ec2 describe-images \

    --owners self \

    --filters Name=name,Values=${IMAGE_KEY} \

    | tee $AMI_DATA > /dev/null

AMI_IMAGE_ID=$(jq -r '.Images[].ImageId' $AMI_DATA)

# Stop watching the worker journal.

sudo kill ${WORKER_JOURNAL_PID}

# NOTE(mhayden): Getting TagSpecifications to play along with bash's

# parsing of curly braces and square brackets is nuts, so we just write some

# json and pass it to the aws command.

tee $AWS_INSTANCE_JSON > /dev/null << EOF

{

    "TagSpecifications": [

        {

            "ResourceType": "instance",

            "Tags": [

                {

                    "Key": "Name",

                    "Value": "${IMAGE_KEY}"

                }

            ]

        }

    ]

}

EOF

# Build instance in AWS with our image.

greenprint "👷🏻 Building instance in AWS"

$AWS_CMD ec2 run-instances \

    --associate-public-ip-address \

    --key-name personal_servers \

    --image-id ${AMI_IMAGE_ID} \

    --instance-type t3a.micro \

    --user-data file://${WORKSPACE}/test/cloud-init/user-data \

    --cli-input-json file://${AWS_INSTANCE_JSON} > /dev/null

# Wait for the instance to finish building.

greenprint "⏱ Waiting for AWS instance to be marked as running"

while true; do

    $AWS_CMD ec2 describe-instances \

        --filters Name=image-id,Values=${AMI_IMAGE_ID} \

        | tee $INSTANCE_DATA > /dev/null

    INSTANCE_STATUS=$(jq -r '.Reservations[].Instances[].State.Name' $INSTANCE_DATA)

    # Break the loop if our instance is running.

    if [[ $INSTANCE_STATUS == running ]]; then

        break

    fi

    # Sleep for 10 seconds and try again.

    sleep 10

done

# Get data about the instance we built.

INSTANCE_ID=$(jq -r '.Reservations[].Instances[].InstanceId' $INSTANCE_DATA)

PUBLIC_IP=$(jq -r '.Reservations[].Instances[].PublicIpAddress' $INSTANCE_DATA)

# Wait for the node to come online.

greenprint "⏱ Waiting for AWS instance to respond to ssh"

for LOOP_COUNTER in {0..30}; do

    if ssh-keyscan $PUBLIC_IP 2>&1 > /dev/null; then

        echo "SSH is up!"

        ssh-keyscan $PUBLIC_IP >> ~/.ssh/known_hosts

        break

    fi

    # Get a screenshot of the instance console.

    echo "Getting instance screenshot..."

    store_instance_screenshot $INSTANCE_ID $LOOP_COUNTER || true

    # ssh-keyscan has a 5 second timeout by default, so the pause per loop

    # is 10 seconds when you include the following `sleep`.

    echo "Retrying in 5 seconds..."

    sleep 5

done

# Check for our smoke test file.

greenprint "🛃 Checking for smoke test file"

for LOOP_COUNTER in {0..10}; do

    RESULTS="$(smoke_test_check $PUBLIC_IP)"

    if [[ $RESULTS == 1 ]]; then

        echo "Smoke test passed! 🥳"

        break

    fi

    sleep 5

done

# Clean up our mess.

greenprint "🧼 Cleaning up"

SNAPSHOT_ID=$(jq -r '.Images[].BlockDeviceMappings[].Ebs.SnapshotId' $AMI_DATA)

$AWS_CMD ec2 terminate-instances --instance-id ${INSTANCE_ID}

$AWS_CMD ec2 deregister-image --image-id ${AMI_IMAGE_ID}

$AWS_CMD ec2 delete-snapshot --snapshot-id ${SNAPSHOT_ID}

# Use the return code of the smoke test to determine if we passed or failed.

if [[ $RESULTS == 1 ]]; then

  greenprint "💚 Success"

else

  greenprint "❌ Failed"

  exit 1

fi

exit 0