# m2-GTK4 - GNU Modula-2 bindings for GTK4
GM2      ?= gm2
CC       ?= gcc
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)
# GtkSourceView 5 is optional too.
SRCVLIBS := $(shell pkg-config --libs gtksourceview-5 2>/dev/null)
# libspelling + libpanel are optional platform libraries.
SPELLIBS := $(shell pkg-config --libs libspelling-1 2>/dev/null)
PANELLIBS := $(shell pkg-config --libs libpanel-1 2>/dev/null)
GLLIBS   := $(shell pkg-config --libs gl 2>/dev/null)
GTKCFG   += $(shell pkg-config --cflags libadwaita-1 2>/dev/null)
GTKCFG   += $(shell pkg-config --cflags gtksourceview-5 2>/dev/null)
GTKCFG   += $(shell pkg-config --cflags libspelling-1 libpanel-1 2>/dev/null)
GTKLIBS  += $(ADWLIBS) $(SRCVLIBS) $(SPELLIBS) $(PANELLIBS) $(GLLIBS)
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 $(OBJDIR)/m2gtkshim.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_models test_cairo test_drawing test_gestures test_models2 test_widgets3 test_shim test_shim2 test_shim3 test_dnd test_media test_gl test_print test_text test_expr test_constraints test_shortcuts test_snapshot test_lastwidgets test_application
EXAMPLES := hello counter inputs containers actions headerbar editor layouts files views builder feedback styling popover dialogs drawing demo gestures customwidget customlayout media clipboard gl richtext snapshot

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

# Include the GtkSourceView example when gtksourceview-5 is installed.
ifneq ($(SRCVLIBS),)
EXAMPLES += sourceview
endif

# Include the spell-checking example with GtkSourceView + libspelling.
ifneq ($(SRCVLIBS)$(SPELLIBS),)
EXAMPLES += spelling
endif

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

all: tests examples demos

$(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 $@

# C shim for GObject subclassing (custom GtkWidget / GdkPaintable).
$(OBJDIR)/m2gtkshim.o: $(LIB_DIR)/m2gtkshim.c | $(OBJDIR)
	$(CC) $(GTKCFG) -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)

# --- m2 gtk-demo (demos/) -------------------------------------------------
DEMO_DIR := demos

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

$(OBJDIR)/DemoCatalog.o: $(DEMO_DIR)/DemoCatalog.mod $(DEMO_DIR)/DemoCatalog.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/DemoImpl.o: $(DEMO_DIR)/DemoImpl.mod $(DEMO_DIR)/DemoImpl.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/DemosBasic.o: $(DEMO_DIR)/DemosBasic.mod $(DEMO_DIR)/DemosBasic.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/DemosLayout.o: $(DEMO_DIR)/DemosLayout.mod $(DEMO_DIR)/DemosLayout.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/DemosText.o: $(DEMO_DIR)/DemosText.mod $(DEMO_DIR)/DemosText.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/DemosWindows.o: $(DEMO_DIR)/DemosWindows.mod $(DEMO_DIR)/DemosWindows.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/DemosInput.o: $(DEMO_DIR)/DemosInput.mod $(DEMO_DIR)/DemosInput.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/DemosChooser.o: $(DEMO_DIR)/DemosChooser.mod $(DEMO_DIR)/DemosChooser.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/DemosCanvas.o: $(DEMO_DIR)/DemosCanvas.mod $(DEMO_DIR)/DemosCanvas.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

$(OBJDIR)/GtkDemo.o: $(DEMO_DIR)/GtkDemo.mod $(DEMO_DIR)/GtkDemo.def | $(OBJDIR)
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) -c $< -o $@

DEMO_OBJS := $(OBJDIR)/DemoCatalog.o $(OBJDIR)/DemoImpl.o $(OBJDIR)/DemosBasic.o \
             $(OBJDIR)/DemosLayout.o $(OBJDIR)/DemosText.o \
             $(OBJDIR)/DemosWindows.o $(OBJDIR)/DemosInput.o \
             $(OBJDIR)/DemosChooser.o $(OBJDIR)/DemosCanvas.o $(OBJDIR)/GtkDemo.o

demos: $(BLD)/demos $(OBJS) $(DEMO_OBJS) $(BLD)/demos/m2gtkdemo

$(BLD)/demos/m2gtkdemo: $(DEMO_DIR)/m2gtkdemo.mod $(OBJS) $(DEMO_OBJS) | $(BLD)/demos
	$(GM2) $(INCLUDES) -I$(DEMO_DIR) $(GM2FLAGS) $(GTKCFG) $< \
	     $(OBJS) $(DEMO_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 GtkSource-5 Gdk-4.0 Gsk-4.0 Spelling-1 Panel-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