#!/bin/sh

REPOROOT="$(git rev-parse --show-toplevel)"
SCRIPTPATH="$(dirname $(readlink -f "$0"))"
cd "$SCRIPTPATH"

makefile="
all: service/.copyts

service/.copyts: src/*
	bash do.sh cleansrc src service/src
	touch service/.copyts
"

shopt -s expand_aliases
alias pushd="pushd &>/dev/null"
alias popd="popd &>/dev/null"

if [ "$1" == "compose" ]; then
	# ensure built service files are up to date
	make --file <(echo "$makefile")

	# forward commands to compose
	pushd service
	docker-compose ${@:2}
	popd
elif [ "$1" == "cleansrc" ]; then
	if [ $# -lt 3 ]; then
		echo "USAGE: do.sh cleansrc <SRC> <DST>"
		exit 0
	fi

	# copy files
	src="$2"
	dst="$3"
	[ -e "$dst" ] && rm -rf "$dst"
	mkdir -p "$dst"
	cp -r "$src"/{*.c,*.h,Makefile,msgs} "$dst"

	# strip comments
	find "$dst" | while read path; do
		if [ -f "$path" ]; then
			if [ ! -z $(echo "$path" | grep '.[hc]$') ]; then
				sed -i -e 's/^\s*\/\*.*\*\/\s*$//g' "$path"     # remove /* */ style comments
				sed -i -e 's/\s*\/\*.*\*\/\s*/ /g' "$path"      # remove /* */ style comments
				sed -i -e 's/\/\/.*//g' "$path"                 # remove // style comments
				sed -i -e ':a;N;$!ba;s/\n\{3,\}/\n\n/g' "$path" # collapse multiple newlines
				sed -i -e 's/fprintf(\s*stderr\s*,\s*/printf(/g' "$path" # replace fprintf stderr
			elif [ "$(basename "$path")" == "Makefile" ]; then
				sed -i -e 's/\s*#.*//g' "$path"                 # remove # style comments
				sed -i -e ':a;N;$!ba;s/\n\{3,\}/\n\n/g' "$path" # collapse multiple newlines
			fi
		fi
	done

	# apply patches if requested
	if [ ! -z "$PATCHED" ]; then
		pushd "$dst"
		git apply "$REPOROOT/src/patches/"*.diff
		popd
	fi
elif [ "$1" == "test" ]; then
	SRCDIR="$PWD/src" DATADIR="$PWD/service/data" bash "tests/test.sh" ${@:2}
elif [ "$1" == "make" ]; then
	make -C src
else
	echo "USAGE: do.sh (compose|test|cleansrc) [args..]"
	echo "EXAMPLES:"
	echo "    do.sh compose up --build       # setup src and start the container"
	echo "    do.sh test stl-upload test.stl # test the upload of STL files"
	echo "    do.sh make                     # build local binary in src"
	echo "    do.sh cleansrc <src> <dst>     # post-process source files for release"
	echo "                                   # if \$PATCHED is set, patches are applied"
fi