#!/usr/bin/env bash
# Run integration tests against the latest docker-ce dind
set -eu -o pipefail

function container_ip {
    local cid=$1
    local network=$2
    docker inspect \
        -f "{{.NetworkSettings.Networks.${network}.IPAddress}}" "$cid"
}

function setup {
    local project=$1
    COMPOSE_PROJECT_NAME=$1 COMPOSE_FILE=$2 docker-compose up -d >&2

    local network="${project}_default"
    # TODO: only run if inside a container
    docker network connect "$network" "$(hostname)"

    engine_ip="$(container_ip "${project}_engine_1" "$network")"
    engine_host="tcp://$engine_ip:2375"
    (
        export DOCKER_HOST="$engine_host"
        timeout -t 200 ./scripts/test/e2e/wait-on-daemon
        ./scripts/test/e2e/load-alpine
        ./scripts/test/e2e/load-busybox
        is_swarm_enabled || docker swarm init
    ) >&2
    echo "$engine_host"
}

function is_swarm_enabled {
    docker info 2> /dev/null | grep -q 'Swarm: active'
}

function cleanup {
    COMPOSE_PROJECT_NAME=$1 COMPOSE_FILE=$2 docker-compose down -v >&2
}

function runtests {
    local engine_host=$1

    # TODO: only run if inside a container
    update-ca-certificates
    # shellcheck disable=SC2086
    env -i \
        TEST_DOCKER_HOST="$engine_host" \
        GOPATH="$GOPATH" \
        PATH="$PWD/build/" \
        "$(which go)" test -v ./e2e/... ${TESTFLAGS-}
}

export unique_id="${E2E_UNIQUE_ID:-cliendtoendsuite}"
compose_env_file=./e2e/compose-env.yaml

cmd=${1-}

case "$cmd" in
    setup)
        setup "$unique_id" "$compose_env_file"
        exit
        ;;
    cleanup)
        cleanup "$unique_id" "$compose_env_file"
        exit
        ;;
    test)
        engine_host=${2-}
        if [[ -z "${engine_host}" ]]; then
            echo "missing parameter docker engine host"
            echo "Usage: $0 test ENGINE_HOST"
            exit 3
        fi
        runtests "$engine_host"
        ;;
    run|"")
        engine_host="$(setup "$unique_id" "$compose_env_file")"
        testexit=0
        runtests "$engine_host" || testexit=$?
        cleanup "$unique_id" "$compose_env_file"
        exit $testexit
        ;;
    shell)
        $SHELL
        ;;
    *)
        echo "Unknown command: $cmd"
        echo "Usage: "
        echo "    $0 [setup | cleanup | test | run] [engine_host]"
        exit 1
        ;;
esac