#        /\         +------------------------------------------------------+ 
#   ____/  \____   /| - Open source game framework licensed to freely use, |
#   \          /  / |   copy, modify and sell without restriction          |
# +--\ ^__^   /--+  |                                                      |
# | ~/        \~ |  | - created for <https://foam.shampoo.ooo>             |
# | ~~~~~~~~~~~~ |  +------------------------------------------------------+
# | SPACE ~~~~~  | /
# |  ~~~~~~~ BOX |/
# +--------------+
#
# Modify location parameters to match locations for each directory on the system and run `make emscripten`

#######################
# Location parameters #
#######################

# Location of project specific source files
SRC_DIR := ./

# Locations of [SPACEBOX] source and dependencies required to be compiled from source. These locations are configured to match the
# structure of the [SPACEBOX] repository but can be modified as necessary.
SB_DIR := ../../
SB_SRC_DIR := $(SB_DIR)src/
SB_LIB_DIR := $(SB_DIR)lib/
SDLGFX2_DIR := $(SB_LIB_DIR)sdl2-gfx/
GLEW_DIR := $(SB_LIB_DIR)glew/

# C and C++ compiler commands
CC := clang
CXX := clang++

# Location of SDL config program
SDLCONFIG := $(HOME)/local/sdl/bin/sdl2-config

# Edit to point to the location of BPmono.ttf
CREATE_FONT_SYMLINK := ln -nsf $(SB_DIR)"BPmono.ttf" .

#############################
# Based on above parameters #
#############################

SDL_CFLAGS = $(shell $(SDLCONFIG) --cflags)
SDL_LFLAGS := $(shell $(SDLCONFIG) --libs)
SB_H_FILES := $(wildcard $(addprefix $(SB_SRC_DIR),*.hpp))
SB_O_FILES := $(filter-out $(addprefix $(SB_SRC_DIR),filesystem.o),$(SB_H_FILES:.hpp=.o))
SRC_H_FILES := $(wildcard $(addprefix $(SRC_DIR),*.hpp))
SRC_O_FILES := browser_webcam_test.o $(SRC_H_FILES:.hpp=.o)

#####################################################################
# Targets for building [SPACE BOX], dependencies and project source #
#####################################################################

$(SDLGFX2_DIR)%.o: $(SDLGFX2_DIR)%.c $(SDLGFX2_DIR)%.h
$(GLEW_DIR)%.o: $(GLEW_DIR)%.c $(GLEW_DIR)%.h
	$(CC) $< $(CFLAGS) -c -o $@

$(SB_SRC_DIR)extension.o : $(addprefix $(SB_SRC_DIR),Box.hpp Segment.hpp Color.hpp filesystem.hpp Pixels.hpp Log.hpp)
$(SB_SRC_DIR)Node.o : $(addprefix $(SB_SRC_DIR),Game.hpp Configuration.hpp Delegate.hpp Display.hpp Input.hpp Box.hpp Audio.hpp Log.hpp)
$(SB_SRC_DIR)Game.o : $(addprefix $(SB_SRC_DIR),extension.hpp Node.hpp Recorder.hpp Input.hpp Configuration.hpp Delegate.hpp Audio.hpp Log.hpp)
$(SB_SRC_DIR)Animation.o : $(addprefix $(SB_SRC_DIR),Node.hpp Timer.hpp)
$(SB_SRC_DIR)Recorder.o : $(addprefix $(SB_SRC_DIR),Node.hpp Game.hpp Configuration.hpp Delegate.hpp Animation.hpp extension.hpp)
$(SB_SRC_DIR)Input.o : $(addprefix $(SB_SRC_DIR),Node.hpp Animation.hpp Configuration.hpp Delegate.hpp)
$(SB_SRC_DIR)Configuration.o : $(addprefix $(SB_SRC_DIR),Node.hpp Animation.hpp Log.hpp)
$(SB_SRC_DIR)Delegate.o : $(addprefix $(SB_SRC_DIR),Node.hpp Game.hpp Input.hpp)
$(SB_SRC_DIR)Display.o : $(addprefix $(SB_SRC_DIR),Node.hpp Game.hpp Box.hpp Configuration.hpp Delegate.hpp Log.hpp)
$(SB_SRC_DIR)Box.o : $(addprefix $(SB_SRC_DIR),extension.hpp Segment.hpp)
$(SB_SRC_DIR)Segment.o : $(addprefix $(SB_SRC_DIR),extension.hpp Box.hpp)
$(SB_SRC_DIR)Pixels.o : $(addprefix $(SB_SRC_DIR),Box.hpp extension.hpp Log.hpp utility.hpp)
$(SB_SRC_DIR)Audio.o : $(addprefix $(SB_SRC_DIR),Node.hpp Display.hpp Configuration.hpp Box.hpp filesystem.hpp extension.hpp)
$(SB_SRC_DIR)GLObject.o : $(addprefix $(SB_SRC_DIR),Log.hpp)
$(SB_SRC_DIR)Texture.o : $(addprefix $(SB_SRC_DIR),GLObject.hpp filesystem.hpp Log.hpp)
$(SB_SRC_DIR)VBO.o : $(addprefix $(SB_SRC_DIR),Log.hpp GLObject.hpp Attributes.hpp extension.hpp)
$(SB_SRC_DIR)Attributes.o : $(addprefix $(SB_SRC_DIR),Log.hpp extension.hpp)
$(SRC_DIR)Model.o : $(addprefix $(SB_SRC_DIR),extension.hpp Attributes.hpp Texture.hpp utility.hpp)
$(SRC_DIR)*.o : $(SRC_H_FILES) $(SB_H_FILES)
%.o : %.cpp %.hpp
	$(CXX) $(CXXFLAGS) $< -c -o $@

#############
# Web build #
#############

# Use Emscripten to output JavaScript and an HTML index page for running in the browser

EMSCRIPTENHOME = $(HOME)/ext/software/emsdk/upstream/emscripten
EMSCRIPTEN_CFLAGS = -O1 -Wall -s USE_SDL=2 -s USE_SDL_IMAGE=2 -s SDL2_IMAGE_FORMATS="['png', 'jpg']" -s USE_SDL_TTF=2 -s USE_SDL_MIXER=2 \
	-I $(SB_LIB_DIR) -I $(SB_SRC_DIR)
EMSCRIPTEN_LFLAGS = -s MIN_WEBGL_VERSION=2 -s EXPORTED_FUNCTIONS="['_main']" -s ALLOW_MEMORY_GROWTH=1 -s FULL_ES3=1 \
	-s LLD_REPORT_UNDEFINED $(wildcard $(addprefix $(HOME)/ext/software/opencv-4.6.0/build_wasm/lib/,*.a)) $(HOME)/ext/software/ZBar/zbar/.libs/libzbar.a \
	--bind
EMSCRIPTEN_PRELOADS = --preload-file "BPmono.ttf"@/ --preload-file "shaders/"@/"shaders/" --preload-file "config.json"@/

emscripten : CC = $(EMSCRIPTENHOME)/emcc
emscripten : CXX = $(EMSCRIPTENHOME)/em++
emscripten : CFLAGS = $(EMSCRIPTEN_CFLAGS)
emscripten : CXXFLAGS = $(CFLAGS) --std=c++17
emscripten : $(addprefix $(SDLGFX2_DIR),SDL2_rotozoom.o SDL2_gfxPrimitives.o) $(SB_O_FILES) $(SRC_O_FILES)
	$(CREATE_FONT_SYMLINK)
	$(CXX) $^ $(CXXFLAGS) $(EMSCRIPTEN_LFLAGS) $(EMSCRIPTEN_PRELOADS) -o browser_webcam_test.js 

#########################
# Clean up object files #
#########################

clean :
	-find $(SRC_DIR) -iname "*.o" -delete
	 rm -f BPmono.ttf browser_webcam_test.data browser_webcam_test.js browser_webcam_test.wasm

clean-all : clean
	-find $(SB_SRC_DIR) -iname "*.o" -delete
	-find $(SB_LIB_DIR) -iname "*.o" -delete