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#!/bin/bash
set -euo pipefail

SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
TESTER_DIR=${SCRIPT_DIR}/tester
DATA_DIR=${TESTER_DIR}/data
MP3_DIR=${SCRIPT_DIR}/../mp3

# Set automatically
arch="`uname -m`"
platform=

verbose=true
fail_fast=false
bin_dir=$(realpath ${SCRIPT_DIR}/..)

__check_platform()
{
    if test -z "$platform" -a \( "$arch" = "arm64" -o "$arch" = "aarch64" \); then
	platform=linux/arm64
    elif test -z "$platform"; then
	platform=linux/amd64
    fi
}

do_help() {
    cat <<EOF
Usage $0:  [options] [command] [tester args]

This command runs tester programs for each component
of Snowcast.

Top-level options:
 --quiet     Don't print the output of each test
 --fail-fast Stop after the first test failure
 --arm       Force using binaries for arm64 platform

Commands:
 all         Run all tests
 server      Run tests for snowcast_server
 control     Run tests for snowcast_control
 milestone   Run tests for the project milestone

Tester args:
 -help       Display usage info for tester

If no command is specified, the default is 'all'.
EOF
}

check_exists() {
    bin="$1"
    if [[ ! -e ${bin} ]]; then
	echo "Binary ${bin} not found!  Exiting"
	exit 1
    fi
}

run_tester() {
    tester_name=$1
    shift

    case $platform in
	linux/amd64)
	    tester_path=${TESTER_DIR}/
	;;
	linux/arm64)
	    tester_path=${TESTER_DIR}/arm64
	;;
	*)
	    echo "Unsupported platform ${platform}"
	    exit 1
    esac

    vflag=""
    if $verbose; then
	vflag="-test.v"
    fi

    failflag=""
    if $fail_fast; then
	failflag="-test.failfast"
    fi

    export BIN_DIR=${bin_dir}
    export MP3_DIR=$MP3_DIR
    export DATA_DIR=$DATA_DIR
    ${tester_path}/${tester_name} $vflag $failflag $@
}

do_server() {
    check_exists "${bin_dir}/snowcast_server"
    run_tester server_tester $@
}

do_control() {
    check_exists "${bin_dir}/snowcast_server"
    run_tester server_tester $@
}

do_milestone() {
   do_control -test.run="Test.+?/Test(ConnectsToServer|AcceptsClientConnection|CompletesHandshake)"
   do_server -test.v -test.run="Test.+?/Test(ConnectsToServer|AcceptsClientConnection|CompletesHandshake)"
}


do_all() {
    do_server $@
    do_control $@
}

main() {
    POSITIONAL=()
    while [[ $# -gt 0 ]]; do
	key=$1
	case $key in
	    --fail-fast|-f)
		shift
		fail_fast=true
		;;
	    --quiet|-q)
		shift
		verbose=false
		;;
	    -a|--arm|--arm64|--aarch64)
		shift
		if [[ ( "${arch}" == "arm64" ) || ( "${arch}" == "aarch64" ) ]]; then
		    platform=linux/arm64
		else
		    echo "$0 --arm only works on arm64 hosts (platform is ${arch})" 1>&2
		    exit 1
		fi
		;;
	    -x|--x86-64)
		shift
		platform=linux/amd64
		;;
	    --bin-dir)
		bin_dir="$2"
		shift
		shift
		;;
	    --help)
		shift
		do_help
		exit 0
		;;
	    *)
		POSITIONAL+=("$1")
		shift
	esac
    done
    set -- "${POSITIONAL[@]}"

    __check_platform

    # Default subcommand
    if [[ $# == 0 ]]; then
	do_all
	exit 0
    fi

    # Subcommands
    case $1 in
	help)
	    do_help
	    exit 0
	    ;;
	server)
	    shift
	    do_server $@
	    ;;
	control)
	    shift
	    do_control $@
	    ;;
	milestone)
	    shift
	    do_milestone $@
	    ;;
	all)
	    shift
	    do_all $@
	    ;;
	*)
	    echo "Unrecognized command $1"
	    exit 1
	    ;;
    esac
}

main $@