SHELL=/bin/bash -o pipefail
INTERACTIVE:=$(shell [ -t 0 ] && echo 1)

ifdef INTERACTIVE
CLEAN_ANSI=
else
CLEAN_ANSI=| sed -r 's/\x1B\[([0-9]{1,3}(;[0-9]{1,2};?)?)?[mGK]//g'
endif

CXX := clang++

CXX_FLAGS := -Wall -Wextra -Werror -std=c++20 \
	     -isystem include/

LD_FLAGS := -L/opt/homebrew/lib

SOURCE_DIR := src/
TEST_DIR := tests/
INCLUDE_DIR := include/

HEADERS := $(shell find $(INCLUDE_DIR) -name *.h)

CPP_SOURCES := $(wildcard $(SOURCE_DIR)*.cxx)
CPP_OBJECTS := $(patsubst %.cxx, .build/%.o, $(CPP_SOURCES))
LIBRARY := abnf-parser.a
LIBRARY := $(patsubst %, .build/lib/%, $(LIBRARY))

TEST_HEADERS := $(wildcard $(TEST_DIR)*.h)
TEST_SOURCES := $(wildcard $(TEST_DIR)*.cxx)
TEST_OBJECTS := $(patsubst %.cxx, .build/%.o, $(TEST_SOURCES))
TEST_BINARIES := .build/bin/selfvalidate
EXECUTE_TESTS := $(patsubst %, %.run, $(TEST_BINARIES))

all: run-test

debug: CXX_FLAGS := $(CXX_FLAGS) -g -fsanitize=address
debug: LD_FLAGS := $(LD_FLAGS) -fsanitize=address
debug: test

clean:
	@ rm -rf .build

build: $(LIBRARY)

test: build
test: $(TEST_BINARIES)

run-test: test
run-test: $(EXECUTE_TESTS)

# Actual Definitions (non-phony)
.build/src/%.o: src/%.cxx $(HEADERS)
	@ mkdir -p .build/src
	$(CXX) $(CXX_FLAGS) -c $< -o $@

.build/tests/%.o: tests/%.cxx $(HEADERS) $(TEST_HEADERS)
	@ mkdir -p .build/tests
	$(CXX) $(CXX_FLAGS) -c $< -o $@


.build/lib/abnf-parser.a: $(CPP_OBJECTS)
	@ mkdir -p .build/lib
	ar rc $@ $^


.build/bin/selfvalidate: .build/tests/selfvalidate_test.o $(LIBRARY)
	@ mkdir -p .build/bin
	@ rm -f $@.done
	$(CXX) $^ -o $@ $(LD_FLAGS) -lgmock -lgtest


.build/bin/selfvalidate.run: .build/bin/selfvalidate
	.build/bin/selfvalidate
	@ touch $@