PROGRAM = konengine
SRCDIR = src
KONDIR = kon
EXTDIR = ext

OBJDIR ?= obj
EXE ?=
MODEFLAGS ?= -O2 -DNDEBUG
DEFS ?=
LDLIBS ?= -lm
MODOBJS ?=

WARN = -std=c99 -Wall -Wextra -Wpedantic
KONFLAGS = $(WARN) $(MODEFLAGS) $(DEFS) -I$(KONDIR) -I$(EXTDIR)
EXTFLAGS = -std=gnu99 -w $(MODEFLAGS) $(DEFS) -I$(EXTDIR)
COMPILE = @mkdir -p $(OBJDIR); echo "\#   compile  $@"; $(CC) $(KONFLAGS) -c
COMPILEEXT = @mkdir -p $(OBJDIR); echo "\#   compile  $@"; $(CC) $(EXTFLAGS) -c

ASSETDIR ?= assets
PACKFLAGS ?=

BIN = $(OBJDIR)/$(PROGRAM)$(EXE)
PACKER = $(OBJDIR)/konpack$(EXE)
MODELER = $(OBJDIR)/konmodel$(EXE)
MZSURVEY = $(OBJDIR)/mzsurvey$(EXE)
MZSCRIPT = $(OBJDIR)/mzscript$(EXE)
KONS2C = $(OBJDIR)/kons2c$(EXE)
MZMAP = $(OBJDIR)/mzmap$(EXE)
EXAMPLES = modelview sound ui platform dialog script corridor hills sectorview
EXAMPLEBINS = $(EXAMPLES:%=$(OBJDIR)/%$(EXE))
PACKFILE = $(OBJDIR)/data.kpk
CORE = $(OBJDIR)/engine.o $(OBJDIR)/konwinlib.o $(OBJDIR)/konsofren.o \
	$(OBJDIR)/kontime.o $(OBJDIR)/koninput.o $(OBJDIR)/konprogram.o
OBJS = $(CORE) $(MODOBJS)

all: $(BIN)

$(BIN): $(OBJS)
	@echo "#   link     $@"
	@$(CC) -o $@ $(OBJS) $(LDLIBS)

$(OBJDIR)/engine.o: $(SRCDIR)/engine.c $(KONDIR)/*.h
	$(COMPILE) $(SRCDIR)/engine.c -o $@

$(OBJDIR)/konwinlib.o: $(SRCDIR)/impl/konwinlib.c $(KONDIR)/konwinlib.h
	$(COMPILE) $(SRCDIR)/impl/konwinlib.c -o $@

$(OBJDIR)/konsofren.o: $(SRCDIR)/impl/konsofren.c $(KONDIR)/konsofren.h
	$(COMPILE) $(SRCDIR)/impl/konsofren.c -o $@

$(OBJDIR)/kontime.o: $(SRCDIR)/impl/kontime.c $(KONDIR)/kontime.h
	$(COMPILE) $(SRCDIR)/impl/kontime.c -o $@

$(OBJDIR)/koninput.o: $(SRCDIR)/impl/koninput.c $(KONDIR)/koninput.h $(KONDIR)/konwinlib.h
	$(COMPILE) $(SRCDIR)/impl/koninput.c -o $@

$(OBJDIR)/konfont.o: $(SRCDIR)/impl/konfont.c $(KONDIR)/konfont.h $(KONDIR)/konsofren.h $(EXTDIR)/stb_truetype.h
	$(COMPILE) $(SRCDIR)/impl/konfont.c -o $@

$(OBJDIR)/konsector.o: $(SRCDIR)/impl/konsector.c $(KONDIR)/konsector.h $(KONDIR)/konsofren.h $(KONDIR)/konmath.h
	$(COMPILE) $(SRCDIR)/impl/konsector.c -o $@

$(OBJDIR)/kontoml.o: $(SRCDIR)/impl/kontoml.c $(KONDIR)/kontoml.h
	$(COMPILE) $(SRCDIR)/impl/kontoml.c -o $@

# modules with a .c next to their header are normal modules, the single header libs go through src/impl
$(OBJDIR)/%.o: $(KONDIR)/%.c $(KONDIR)/*.h $(EXTDIR)/*.h
	$(COMPILE) $< -o $@

$(OBJDIR)/stb_image.o: $(SRCDIR)/impl/stb_image.c $(EXTDIR)/stb_image.h
	$(COMPILEEXT) $(SRCDIR)/impl/stb_image.c -o $@

$(OBJDIR)/miniaudio.o: $(SRCDIR)/impl/miniaudio.c $(EXTDIR)/miniaudio.h
	$(COMPILEEXT) $(SRCDIR)/impl/miniaudio.c -o $@

# only built when ext/stb_vorbis.c exists, build.sh checks
$(OBJDIR)/stb_vorbis.o: $(EXTDIR)/stb_vorbis.c
	$(COMPILEEXT) $(EXTDIR)/stb_vorbis.c -o $@

tools: $(PACKER) $(MODELER) $(MZSURVEY) $(MZSCRIPT) $(KONS2C) $(MZMAP)

# every example is its own program, built from the same modules as the engine without engine.c
examples: $(EXAMPLEBINS)

$(OBJDIR)/%.o: examples/%.c $(KONDIR)/*.h
	$(COMPILE) $< -o $@

$(EXAMPLEBINS): $(OBJDIR)/%$(EXE): $(OBJDIR)/%.o $(filter-out $(OBJDIR)/engine.o,$(OBJS))
	@echo "#   link     $@"
	@$(CC) -o $@ $^ $(LDLIBS)

$(PACKER): tools/konpack.c $(KONDIR)/konpack.c $(KONDIR)/konpack.h
	@mkdir -p $(OBJDIR)
	@echo "#   link     $@"
	@$(CC) $(KONFLAGS) -DKONPACK_WRITER -o $@ tools/konpack.c $(KONDIR)/konpack.c

# the converter is built without DEFS, it only needs the loader and the glTF reader
TOOLFLAGS = $(WARN) $(MODEFLAGS) -I$(KONDIR) -I$(EXTDIR)

$(OBJDIR)/cgltf.o: tools/cgltf.c $(EXTDIR)/cgltf.h
	@mkdir -p $(OBJDIR)
	@echo "#   compile  $@"
	@$(CC) -std=gnu99 -w $(MODEFLAGS) -I$(EXTDIR) -c tools/cgltf.c -o $@

$(MODELER): tools/konmodel.c $(OBJDIR)/cgltf.o $(KONDIR)/konmodel.c $(KONDIR)/konmodel.h $(KONDIR)/konassets.c $(KONDIR)/konpack.c $(SRCDIR)/impl/konsofren.c
	@echo "#   link     $@"
	@$(CC) $(TOOLFLAGS) -DKONSOFREN_3D -DKONMODEL_WRITER -o $@ tools/konmodel.c $(KONDIR)/konmodel.c $(KONDIR)/konassets.c $(KONDIR)/konpack.c $(SRCDIR)/impl/konsofren.c $(OBJDIR)/cgltf.o -lm

# converters. they only read other programs' data, the engine is not linked in
$(MZSURVEY): tools/mzsurvey.c $(KONDIR)/konjson.h
	@mkdir -p $(OBJDIR)
	@echo "#   link     $@"
	@$(CC) $(TOOLFLAGS) -o $@ tools/mzsurvey.c

$(MZSCRIPT): tools/mzscript.c tools/konscriptc.h $(KONDIR)/konjson.h $(KONDIR)/konscript.c $(KONDIR)/konscript.h
	@mkdir -p $(OBJDIR)
	@echo "#   link     $@"
	@$(CC) $(TOOLFLAGS) -Itools -o $@ tools/mzscript.c $(KONDIR)/konscript.c

$(KONS2C): tools/kons2c.c tools/konscriptc.h $(KONDIR)/konscript.c $(KONDIR)/konscript.h
	@mkdir -p $(OBJDIR)
	@echo "#   link     $@"
	@$(CC) $(TOOLFLAGS) -Itools -o $@ tools/kons2c.c $(KONDIR)/konscript.c

$(MZMAP): tools/mzmap.c $(KONDIR)/konjson.h
	@mkdir -p $(OBJDIR)
	@echo "#   link     $@"
	@$(CC) $(TOOLFLAGS) -o $@ tools/mzmap.c

pack: $(PACKER)
	@find $(ASSETDIR) -type f | sort > $(OBJDIR)/assets.lst
	$(PACKER) -c $(PACKFILE) $(PACKFLAGS) -b $(ASSETDIR) -l $(OBJDIR)/assets.lst

run: $(BIN)
	./$(BIN)

clean:
	rm -f $(OBJDIR)/*.o $(BIN) $(PACKER) $(MODELER) $(MZSURVEY) $(MZSCRIPT) $(KONS2C) $(MZMAP) $(EXAMPLEBINS) $(PACKFILE) $(OBJDIR)/assets.lst

.PHONY: all run clean tools pack examples