# m2-GTK4 - GNU Modula-2 bindings for GTK4
GM2      ?= gm2
GTKCFG   := $(shell pkg-config --cflags gtk4 2>/dev/null)
GTKLIBS  := $(shell pkg-config --libs gtk4 2>/dev/null || echo -lgtk-4)
# libadwaita is optional; added to the flags when present.
ADWLIBS  := $(shell pkg-config --libs libadwaita-1 2>/dev/null)
GTKCFG   += $(shell pkg-config --cflags libadwaita-1 2>/dev/null)
GTKLIBS  += $(ADWLIBS)
GM2FLAGS ?= -fiso
GIR      ?= Gtk-4.0
GIR_DIR  ?= /usr/share/gir-1.0

SRC_DIR := src
LIB_DIR := lib
BLD     := build
OBJDIR  := $(BLD)/objs
OBJS    := $(OBJDIR)/GtkUtils.o $(OBJDIR)/GtkClosures.o

INCLUDES := -I$(SRC_DIR) -I$(LIB_DIR)

TESTS    := test_glib test_version test_widgets test_inputs test_inputs2 test_containers test_containers2 test_actions test_closure test_headerbar test_gio test_gerror test_filedialog test_views test_builder test_utility test_css test_popover test_dialogs test_application
EXAMPLES := hello counter inputs containers actions headerbar editor layouts files views builder feedback styling popover dialogs

# Include the libadwaita test/example only when libadwaita is installed.
ifneq ($(ADWLIBS),)
TESTS    += test_adw
EXAMPLES += adw
endif

.PHONY: all tests examples check clean gir gir-check gir-verify

all: tests examples

$(OBJDIR):
	mkdir -p $(OBJDIR)

$(BLD)/tests:
	mkdir -p $(BLD)/tests

$(BLD)/examples:
	mkdir -p $(BLD)/examples

# The FOR "C" .def modules carry no code; only the pure-M2 helpers are
# compiled to object files and linked into every program.
$(OBJDIR)/GtkUtils.o: $(LIB_DIR)/GtkUtils.mod $(LIB_DIR)/GtkUtils.def | $(OBJDIR)
	$(GM2) $(INCLUDES) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/GtkClosures.o: $(LIB_DIR)/GtkClosures.mod $(LIB_DIR)/GtkClosures.def | $(OBJDIR)
	$(GM2) $(INCLUDES) $(GM2FLAGS) -c $< -o $@

tests: $(BLD)/tests $(OBJS) $(addprefix $(BLD)/tests/,$(TESTS))

$(BLD)/tests/%: tests/%.mod $(OBJS) | $(BLD)/tests
	$(GM2) $(INCLUDES) $(GM2FLAGS) $(GTKCFG) $< $(OBJS) -o $@ $(GTKLIBS)

examples: $(BLD)/examples $(OBJS) $(addprefix $(BLD)/examples/,$(EXAMPLES))

$(BLD)/examples/%: examples/%.mod $(OBJS) | $(BLD)/examples
	$(GM2) $(INCLUDES) $(GM2FLAGS) $(GTKCFG) $< $(OBJS) -o $@ $(GTKLIBS)

check: tests
	./tests/run_tests.sh

# Optional GIR -> .def generator (broad, auto-generated coverage).
#   make gir                       # Gtk-4.0 -> gen/
#   make gir GIR=Gio-2.0           # another namespace
gir:
	python3 tools/gir2def.py $(GIR) --gir-dir $(GIR_DIR) -o gen

# Generate and compile/link-check a sample of the output.
gir-check:
	./tools/run_gir_check.sh

# Check that every generated identifier exists in the installed library.
GIR_VERIFY ?= Gtk-4.0 GLib-2.0 Gio-2.0 Adw-1
gir-verify:
	set -e; for ns in $(GIR_VERIFY); do \
	    python3 tools/gir_verify.py $$ns --gir-dir $(GIR_DIR); \
	done

clean:
	rm -rf $(BLD) gen