#!/usr/bin/env bash

function build() {
	ROOT=$(dirname $0)
	NAME="edge-node"
	VERSION=$(lookup-version $ROOT/../internal/const/const.go)
	DIST=$ROOT/"../dist/${NAME}"
	OS=${1}
	ARCH=${2}
	TAG=${3}

	if [ -z $OS ]; then
		echo "usage: build.sh OS ARCH"
		exit
	fi
	if [ -z $ARCH ]; then
		echo "usage: build.sh OS ARCH"
		exit
	fi
	if [ -z $TAG ]; then
		TAG="community"
	fi

	echo "checking ..."
	ZIP_PATH=$(which zip)
	if [ -z $ZIP_PATH ]; then
		echo "we need 'zip' command to compress files"
		exit
	fi

	echo "building v${VERSION}/${OS}/${ARCH}/${TAG} ..."
	ZIP="${NAME}-${OS}-${ARCH}-${TAG}-v${VERSION}.zip"

	echo "copying ..."
	if [ ! -d $DIST ]; then
		mkdir $DIST
		mkdir $DIST/bin
		mkdir $DIST/configs
		mkdir $DIST/logs
		mkdir $DIST/data
	fi

	cp $ROOT/configs/api.template.yaml $DIST/configs
	cp -R $ROOT/www $DIST/
	cp -R $ROOT/pages $DIST/
	cp -R $ROOT/resources $DIST/

	# we support TOA on linux/amd64 only
	if [ $OS == "linux" -a $ARCH == "amd64" ]
	then
		cp -R $ROOT/edge-toa $DIST
	fi

	echo "building ..."

	MUSL_DIR="/usr/local/opt/musl-cross/bin"
	CC_PATH=""
	CXX_PATH=""
	if [[ `uname -a` == *"Darwin"* && "${OS}" == "linux" ]]; then
		# /usr/local/opt/musl-cross/bin/
		if [ "${ARCH}" == "amd64" ]; then
			CC_PATH="x86_64-linux-musl-gcc"
			CXX_PATH="x86_64-linux-musl-g++"
		fi
		if [ "${ARCH}" == "386" ]; then
			CC_PATH="i486-linux-musl-gcc"
			CXX_PATH="i486-linux-musl-g++"
		fi
		if [ "${ARCH}" == "arm64" ]; then
			CC_PATH="aarch64-linux-musl-gcc"
			CXX_PATH="aarch64-linux-musl-g++"
		fi
		if [ "${ARCH}" == "arm" ]; then
			CC_PATH="arm-linux-musleabi-gcc"
			CXX_PATH="arm-linux-musleabi-g++"
		fi
		if [ "${ARCH}" == "mips64" ]; then
			CC_PATH="mips64-linux-musl-gcc"
			CXX_PATH="mips64-linux-musl-g++"
		fi
		if [ "${ARCH}" == "mips64le" ]; then
			CC_PATH="mips64el-linux-musl-gcc"
			CXX_PATH="mips64el-linux-musl-g++"
		fi
	fi
	if [ ! -z $CC_PATH ]; then
		env CC=$MUSL_DIR/$CC_PATH CXX=$MUSL_DIR/$CXX_PATH GOOS=${OS} GOARCH=${ARCH} CGO_ENABLED=1 go build -tags $TAG -o $DIST/bin/${NAME} -ldflags "-linkmode external -extldflags -static -s -w" $ROOT/../cmd/edge-node/main.go
	else
		env GOOS=${OS} GOARCH=${ARCH} CGO_ENABLED=1 go build -tags $TAG -o $DIST/bin/${NAME} -ldflags="-s -w" $ROOT/../cmd/edge-node/main.go
	fi

	# delete hidden files
	find $DIST -name ".DS_Store" -delete
	find $DIST -name ".gitignore" -delete

	echo "zip files"
	cd "${DIST}/../" || exit
	if [ -f "${ZIP}" ]; then
		rm -f "${ZIP}"
	fi
	zip -r -X -q "${ZIP}" ${NAME}/
	rm -rf ${NAME}
	cd - || exit

	echo "OK"
}

function lookup-version() {
	FILE=$1
	VERSION_DATA=$(cat $FILE)
	re="Version[ ]+=[ ]+\"([0-9.]+)\""
	if [[ $VERSION_DATA =~ $re ]]; then
		VERSION=${BASH_REMATCH[1]}
		echo $VERSION
	else
		echo "could not match version"
		exit
	fi
}

build $1 $2 $3
