#!/bin/bash -e

set -E
set -o pipefail
set -x

WORK_DIR="$PWD/.verify-$RANDOM"
MINIO_CONFIG_DIR="$WORK_DIR/.minio"
MINIO=( "$PWD/minio" --config-dir "$MINIO_CONFIG_DIR" server )

if [ ! -x "$PWD/minio" ]; then
    echo "minio executable binary not found in current directory"
    exit 1
fi

if [ ! -x "$PWD/minio" ]; then
    echo "minio executable binary not found in current directory"
    exit 1
fi

function start_minio_4drive() {
    start_port=$1

    export MINIO_ROOT_USER=minio
    export MINIO_ROOT_PASSWORD=minio123
    export MC_HOST_minio="http://minio:minio123@127.0.0.1:${start_port}/"
    unset MINIO_KMS_AUTO_ENCRYPTION # do not auto-encrypt objects
    export MINIO_CI_CD=1

    mkdir ${WORK_DIR}
    C_PWD=${PWD}
    if [ ! -x "$PWD/mc" ]; then
	MC_BUILD_DIR="mc-$RANDOM"
	if ! git clone --quiet https://github.com/minio/mc "$MC_BUILD_DIR"; then
	    echo "failed to download https://github.com/minio/mc"
	    purge "${MC_BUILD_DIR}"
	    exit 1
	fi

	(cd "${MC_BUILD_DIR}" && go build -o "$C_PWD/mc")

	# remove mc source.
	purge "${MC_BUILD_DIR}"
    fi

    "${MINIO[@]}" --address ":$start_port" "${WORK_DIR}/disk{1...4}" > "${WORK_DIR}/server1.log" 2>&1 &
    pid=$!
    disown $pid
    sleep 5

    if ! ps -p ${pid} 1>&2 >/dev/null; then
	echo "server1 log:"
	cat "${WORK_DIR}/server1.log"
	echo "FAILED"
	purge "$WORK_DIR"
	exit 1
    fi

    "${PWD}/mc" mb --with-versioning minio/bucket

    for i in $(seq 1 4); do
	"${PWD}/mc" cp /etc/hosts minio/bucket/testobj

	sudo chown -R root. "${WORK_DIR}/disk${i}"

	"${PWD}/mc" cp /etc/hosts minio/bucket/testobj

	sudo chown -R ${USER}. "${WORK_DIR}/disk${i}"
    done

    for vid in $("${PWD}/mc" ls --json --versions minio/bucket/testobj | jq -r .versionId); do
	"${PWD}/mc" cat --vid "${vid}" minio/bucket/testobj | md5sum
    done

    pkill minio
    sleep 3
}

function main() {
    start_port=$(shuf -i 10000-65000 -n 1)

    start_minio_4drive ${start_port}
}

function purge()
{
    rm -rf "$1"
}

( main "$@" )
rv=$?
purge "$WORK_DIR"
exit "$rv"
