#!/bin/bash

set -euo pipefail


IMAGE="quay-ci"

CACHE_DIR="${HOME}/docker"
SHORT_SHA="${TRAVIS_COMMIT:0:7}"
IMAGE_TAG="${SHORT_SHA}-${TRAVIS_BUILD_NUMBER}"
IMAGE_TAR="${CACHE_DIR}/${IMAGE}-${IMAGE_TAG}.tar.gz"

MYSQL_IMAGE="mysql:5.6"
POSTGRES_IMAGE="postgres:9.6"

export MYSQL_ROOT_PASSWORD="quay"
export MYSQL_USER="quay"
export MYSQL_PASSWORD="quay"
export MYSQL_DATABASE="quay_ci"

export POSTGRES_USER="quay"
export POSTGRES_PASSWORD="quay"
export POSTGRES_DB="quay_ci"


build_image() {
    # Build the image and save it to the shared cache.
    docker build -t "${IMAGE}:${IMAGE_TAG}" .

    echo "Exporting Docker image to cache..."
    time (docker save "${IMAGE}:${IMAGE_TAG}" | gzip -2 > "${IMAGE_TAR}")
}


load_image() {
    # Load our cached Docker image.
    echo "Loading Docker image from cache..."
    time (zcat "${IMAGE_TAR}" | docker load)
}


clean_cache() {
    rm "${IMAGE_TAR}"
}


quay_run() {
    docker run --net=host -e TEST_DATABASE_URI -ti "${IMAGE}:${IMAGE_TAG}" "$@"
}


unit() {
    load_image && quay_run make unit-test
}


registry() {
    load_image && quay_run make registry-test
}


registry_old() {
    load_image && quay_run make registry-test-old
}


mysql_ping() {
    mysqladmin --connect-timeout=2 --wait=30 --host=127.0.0.1 \
               --user=root --password="${MYSQL_ROOT_PASSWORD}" ping
}


mysql_start() {
    docker run --net=host -d -e MYSQL_ROOT_PASSWORD -e MYSQL_USER \
           -e MYSQL_PASSWORD -e MYSQL_DATABASE "${MYSQL_IMAGE}"

    if ! (sleep 10 && mysql_ping); then
        echo "MySQL failed to respond in time."
        exit 1
    fi
}


mysql() {
    TEST_DATABASE_URI="mysql+pymysql://"
    TEST_DATABASE_URI+="${MYSQL_USER}:${MYSQL_PASSWORD}"
    TEST_DATABASE_URI+="@127.0.0.1/${MYSQL_DATABASE}"

    export TEST_DATABASE_URI

    load_image
    mysql_start
    quay_run make full-db-test
}


postgres_ping() {
    pg_isready --timeout=30 --dbname="${TEST_DATABASE_URI}"
}


postgres_start() {
    docker run --net=host -d -e POSTGRES_USER -e POSTGRES_PASSWORD \
           -e POSTGRES_DB "${POSTGRES_IMAGE}"

    if ! (sleep 10 && postgres_ping); then
        echo "PostgreSQL failed to respond in time."
        exit 1
    fi    
}


postgres() {
    TEST_DATABASE_URI="postgresql://"
    TEST_DATABASE_URI+="${POSTGRES_USER}:${POSTGRES_PASSWORD}"
    TEST_DATABASE_URI+="@127.0.0.1/${POSTGRES_DB}"

    export TEST_DATABASE_URI

    load_image
    postgres_start
    quay_run make full-db-test
}


case "$1" in
    build)
        build_image
        ;;

    unit)
        unit
        ;;

    registry)
        registry
        ;;

    registry_old)
        registry_old
        ;;

    mysql)
        mysql
        ;;

    postgres)
        postgres
        ;;

    clean)
        clean_cache
        ;;

    *)
        echo "Usage: $0 {build|unit|registry|registry_old|mysql|postgres|clean}"
        exit 1
        ;;
esac