ROOT = $(TUP_CWD)

## Base
ifeq (@(CC),)
CC = clang
else
CC = @(CC)
endif
CFLAGS += -std=c99 -pedantic
CFLAGS += -D_POSIX_C_SOURCE=200809L
CFLAGS += -I$(ROOT)/src
CFLAGS += -I$(ROOT)/src/modules
CFLAGS += -fvisibility=hidden
CFLAGS += -Wall -Wextra
CFLAGS += -Wno-unused-parameter
CFLAGS_@(STRICT) += -Werror
FLAGS_@(DEBUG) += -g
FLAGS_@(OPTIMIZE) += -Oz
FLAGS_@(SANITIZE) += -fsanitize=address,undefined

## Windows
CFLAGS_win32 += -DLOVR_GL
CFLAGS_win32 += -D_CRT_SECURE_NO_WARNINGS
CFLAGS_win32 += -Wno-language-extension-token
LDFLAGS_win32 += -lShell32 -lOle32
EXTRAS_win32 += bin/lovr.lib bin/lovr.exp
ifeq (@(DEBUG),y)
EXTRAS_win32 += bin/lovr.pdb bin/lovr.ilk
endif

## Linux
CFLAGS_linux += -DLOVR_GL
LDFLAGS_linux += -lm -lpthread -ldl
LDFLAGS_linux += -Wl,-rpath,\$ORIGIN

## macOS
CFLAGS_macos += -DLOVR_GL
LDFLAGS_macos += -Wl,-rpath,@executable_path
LDFLAGS_macos += -lobjc

## Android
CFLAGS_android += -DLOVR_GLES
CFLAGS_android += -I@(ANDROID_NDK)/sources/android/native_app_glue
CFLAGS_android += --target=aarch64-linux-android@(ANDROID_VERSION)
LDFLAGS_android += --target=aarch64-linux-android@(ANDROID_VERSION)
LDFLAGS_android += -landroid -lEGL -lGLESv3
LDFLAGS_android += -shared

## emscripten
CFLAGS_web += -DLOVR_WEBGL
LDFLAGS_web += -s USE_WEBGL2
LDFLAGS_web += -s FORCE_FILESYSTEM
LDFLAGS_web += -s EXPORTED_FUNCTIONS="['_main','_lovrDestroy','_webxr_attach','_webxr_detach','_lovrCanvasCreateFromHandle','_lovrCanvasDestroy','_lovrGraphicsSetBackbuffer','_lovrGraphicsSetViewMatrix','_lovrGraphicsSetProjection']"
LDFLAGS_@(WEBXR)_web += --js-library $(ROOT)/src/resources/webxr.js
LDFLAGS_web += --shell-file $(ROOT)/src/resources/lovr.html
CFLAGS_@(THREAD)_web += -s USE_PTHREADS=1
LDFLAGS_@(THREAD)_web += -s USE_PTHREADS=1
EXTRAS_web = bin/lovr.js bin/lovr.wasm
EXTRAS_@(THREAD)_web += bin/lovr.worker.js

## Modules
DISABLE_@(AUDIO) += -DLOVR_DISABLE_AUDIO
DISABLE_@(DATA) += -DLOVR_DISABLE_DATA
DISABLE_@(EVENT) += -DLOVR_DISABLE_EVENT
DISABLE_@(FILESYSTEM) += -DLOVR_DISABLE_FILESYSTEM
DISABLE_@(GRAPHICS) += -DLOVR_DISABLE_GRAPHICS
DISABLE_@(HEADSET) += -DLOVR_DISABLE_HEADSET
DISABLE_@(MATH) += -DLOVR_DISABLE_MATH
DISABLE_@(PHYSICS) += -DLOVR_DISABLE_PHYSICS
DISABLE_@(THREAD) += -DLOVR_DISABLE_THREAD
DISABLE_@(TIMER) += -DLOVR_DISABLE_TIMER

## Headset backends
CFLAGS_@(SIMULATOR) += -DLOVR_USE_DESKTOP_HEADSET
CFLAGS_@(OPENVR) += -DLOVR_USE_OPENVR
CFLAGS_@(OPENXR) += -DLOVR_USE_OPENXR
CFLAGS_@(OPENXR) += -Ideps/openxr/include
CFLAGS_@(OCULUS) += -DLOVR_USE_OCULUS
CFLAGS_@(OCULUS) += -I@(OCULUS_PATH)/LibOVR/Include
CFLAGS_@(VRAPI) += -DLOVR_USE_VRAPI
CFLAGS_@(PICO) += -DLOVR_USE_PICO
CFLAGS_@(WEBXR) += -DLOVR_USE_WEBXR

## Libraries
ifneq (@(CMAKE_DEPS),)
  BUILD = @(CMAKE_DEPS)
  DEPS = $(ROOT)/deps

  ifeq (@(OPTIMIZE),y)
  CONFIG = Release
  else
  CONFIG = Debug
  endif

  # Lua
  ifeq (@(LUAJIT),y)
    CFLAGS += -I$(DEPS)/luajit/src
    LDFLAGS_win32 += -L$(BUILD)/luajit/src/$(CONFIG) -lluajit
    LDFLAGS_macos += -L$(BUILD)/luajit/src -lluajit -pagezero_size 10000 -image_base 100000000
    LDFLAGS_linux += -L$(BUILD)/luajit/src -lluajit
    LDFLAGS_android += -L$(BUILD)/luajit/src -lluajit
    LIBS_win32 += $(BUILD)/luajit/src/$(CONFIG)/luajit.dll
    LIBS_macos += $(BUILD)/luajit/src/libluajit.dylib
    LIBS_linux += $(BUILD)/luajit/src/libluajit.so
  else
    CFLAGS += -I$(DEPS)/lua/src -I$(BUILD)/lua
    LDFLAGS_win32 += -L$(BUILD)/lua/$(CONFIG) -llua
    LDFLAGS_macos += -L$(BUILD)/lua -llua
    LDFLAGS_linux += -L$(BUILD)/lua -llua
    LDFLAGS_android += -L$(BUILD)/lua -llua
    LDFLAGS_web += $(BUILD)/lua/liblua.a
  endif

  # GLFW
  CFLAGS_win32 += -I$(DEPS)/glfw/include
  CFLAGS_macos += -I$(DEPS)/glfw/include
  CFLAGS_linux += -I$(DEPS)/glfw/include
  LDFLAGS_win32 += -L$(BUILD)/glfw/src/$(CONFIG) -lglfw3dll
  LDFLAGS_macos += -L$(BUILD)/glfw/src -lglfw
  LDFLAGS_linux += -L$(BUILD)/glfw/src -lglfw
  LIBS_win32 += $(BUILD)/glfw/src/$(CONFIG)/glfw3.dll
  LIBS_macos += $(BUILD)/glfw/src/libglfw.*dylib
  LIBS_linux += $(BUILD)/glfw/src/libglfw.*so*

  # OpenAL
  CFLAGS_@(AUDIO)_win32 += -I$(DEPS)/openal-soft/include
  CFLAGS_@(AUDIO)_macos += -I$(DEPS)/openal-soft/include
  CFLAGS_@(AUDIO)_linux += -I$(DEPS)/openal-soft/include
  CFLAGS_@(AUDIO)_android += -I$(DEPS)/openal-soft/include
  LDFLAGS_@(AUDIO)_win32 += -L$(BUILD)/openal/$(CONFIG) -lOpenAL32
  LDFLAGS_@(AUDIO)_macos += -L$(BUILD)/openal -lopenal
  LDFLAGS_@(AUDIO)_linux += -L$(BUILD)/openal -lopenal
  LDFLAGS_@(AUDIO)_android += -L$(BUILD)/lib/arm64-v8a -lopenal
  LIBS_@(AUDIO)_win32 += $(BUILD)/openal/$(CONFIG)/OpenAL32.dll
  LIBS_@(AUDIO)_macos += $(BUILD)/openal/libopenal.*dylib
  LIBS_@(AUDIO)_linux += $(BUILD)/openal/libopenal.*so*
  LIBS_@(AUDIO)_android += $(BUILD)/lib/arm64-v8a/libopenal.*so*

  # msdfgen
  CFLAGS_@(DATA) += -I$(DEPS)/msdfgen
  LDFLAGS_@(DATA)_win32 += -L$(BUILD)/lib_msdfgen/$(CONFIG) -lmsdfgen
  LDFLAGS_@(DATA)_macos += -L$(BUILD)/lib_msdfgen -lmsdfgen
  LDFLAGS_@(DATA)_linux += -L$(BUILD)/lib_msdfgen -lmsdfgen
  LDFLAGS_@(DATA)_android += -L$(BUILD)/lib_msdfgen -lmsdfgen
  LDFLAGS_@(DATA)_web += $(BUILD)/lib_msdfgen/libmsdfgen.a
  LIBS_@(DATA)_win32 += $(BUILD)/lib_msdfgen/$(CONFIG)/msdfgen.dll
  LIBS_@(DATA)_macos += $(BUILD)/lib_msdfgen/libmsdfgen.dylib
  LIBS_@(DATA)_linux += $(BUILD)/lib_msdfgen/libmsdfgen.so

  # OpenVR
  CFLAGS_@(OPENVR) += -I$(DEPS)/openvr/headers
  LDFLAGS_@(OPENVR)_win32 += -L$(DEPS)/openvr/bin/win64/$(CONFIG) -lopenvr_api64
  LDFLAGS_@(OPENVR)_macos += -L$(BUILD)/openvr_api -lopenvr_api
  LDFLAGS_@(OPENVR)_linux += -L$(BUILD)/openvr_api -lopenvr_api
  LIBS_@(OPENVR)_win32 += $(DEPS)/openvr/bin/win64/openvr_api.dll
  LIBS_@(OPENVR)_macos += $(BUILD)/openvr_api/libopenvr_api.dylib
  LIBS_@(OPENVR)_linux += $(BUILD)/openvr_api/libopenvr_api.so

  # ODE
  CFLAGS_@(PHYSICS) += -I$(DEPS)/ode/include -I$(BUILD)/ode/include
  LDFLAGS_@(PHYSICS)_win32 += -L$(BUILD)/ode/$(CONFIG) -lode
  LDFLAGS_@(PHYSICS)_macos += -L$(BUILD)/ode -lode
  LDFLAGS_@(PHYSICS)_linux += -L$(BUILD)/ode -lode
  LDFLAGS_@(PHYSICS)_android += -L$(BUILD)/lib/arm64-v8a -lode
  LDFLAGS_@(PHYSICS)_web += $(BUILD)/ode/libode.a
  LIBS_@(PHYSICS)_win32 += $(BUILD)/ode/$(CONFIG)/ode.dll
  LIBS_@(PHYSICS)_macos += $(BUILD)/ode/libode.dylib
  LIBS_@(PHYSICS)_linux += $(BUILD)/ode/libode.so
  LIBS_@(PHYSICS)_android += $(BUILD)/lib/arm64-v8a/libode.so
endif

## Android
ifeq (@(PLATFORM),android)
  CC = @(ANDROID_NDK)/toolchains/llvm/prebuilt/@(ANDROID_HOST_TAG)/bin/clang
  TOOLS = @(ANDROID_SDK)/build-tools/@(ANDROID_BUILD_TOOLS_VERSION)
  ANDROID_JAR = @(ANDROID_SDK)/platforms/android-@(ANDROID_VERSION)/android.jar

  ACTIVITY_@(OPENXR) = Activity_openxr
  ACTIVITY_@(VRAPI) = Activity_vrapi
  ACTIVITY_@(PICO) = Activity_pico
  ANDROID_MANIFEST_@(OPENXR) = src/resources/AndroidManifest_oculus.xml
  ANDROID_MANIFEST_@(VRAPI) = src/resources/AndroidManifest_oculus.xml
  ANDROID_MANIFEST_@(PICO) = src/resources/AndroidManifest_pico.xml

  ifneq (@(ANDROID_MANIFEST),)
  ANDROID_MANIFEST_y = @(ANDROID_MANIFEST)
  endif

  ifneq (@(ANDROID_ASSETS),)
  ANDROID_ASSETS = -A @(ANDROID_ASSETS)
  endif

  CLASSPATH = $(ANDROID_JAR)
  ifeq (@(PICO),y)
    EXTRA_JARS = $(DEPS)/pico/classes.jar
    ifeq (@(TUP_PLATFORM),win32)
      CLASSPATH = "$(CLASSPATH);$(EXTRA_JARS)"
    else
      CLASSPATH = "$(CLASSPATH):$(EXTRA_JARS)"
    endif
  endif

  !dx = |> ^ DX %b^ dx --dex --output=%o %f |>
  !zipalign = |> ^ ZIPALIGN %f^ $(TOOLS)/zipalign -f 4 %f %o |>
  !apksigner = |> ^ APKSIGNER %o^ $(TOOLS)/apksigner sign --ks @(ANDROID_KEYSTORE) --ks-pass @(ANDROID_KEYSTORE_PASS) --out %o %f |>

  ifneq ($(BUILD),)
    OPENXR_LIB_PATH = $(DEPS)/OpenXR-Oculus/Libs/Android/arm64-v8a/Release
    VRAPI_LIB_PATH = $(DEPS)/VrApi/Libs/Android/arm64-v8a/Release
    PICO_LIB_PATH = $(DEPS)/pico/jni/arm64-v8a

    CFLAGS_@(OPENXR) += -I$(DEPS)/OpenXR-Oculus/Include
    CFLAGS_@(VRAPI) += -I$(DEPS)/VrApi/Include

    LDFLAGS_@(OPENXR) += -L$(OPENXR_LIB_PATH) -lopenxr_loader
    LDFLAGS_@(VRAPI) += -L$(VRAPI_LIB_PATH) -lvrapi
    LDFLAGS_@(PICO) += -L$(PICO_LIB_PATH) -lPvr_NativeSDK

    LIBS_@(OPENXR) += $(OPENXR_LIB_PATH)/libopenxr_loader.so
    LIBS_@(VRAPI) += $(VRAPI_LIB_PATH)/libvrapi.so
    LIBS_@(PICO) += $(PICO_LIB_PATH)/libPvr_NativeSDK.so
  endif
endif

## Platform (I don't think tup has a better way to do this stuff aside from using Lua...)
ifeq (@(PLATFORM),)
PLATFORM = @(TUP_PLATFORM)
else
PLATFORM = @(PLATFORM)
endif

ifeq ($(PLATFORM),android)
LIB = bin/apk/lib/arm64-v8a
else
LIB = bin
endif

ifeq ($(PLATFORM),win32)
CFLAGS += $(CFLAGS_win32) $(CFLAGS_y_win32)
LDFLAGS += $(LDFLAGS_win32) $(LDFLAGS_y_win32)
EXTRAS += $(EXTRAS_win32) $(EXTRAS_y_win32)
LIBS += $(LIBS_y_win32)
SUFFIX = .exe
endif

ifeq ($(PLATFORM),macosx)
PLATFORM = macos
CFLAGS += $(CFLAGS_macos) $(CFLAGS_y_macos)
LDFLAGS += $(LDFLAGS_macos) $(LDFLAGS_y_macos)
LIBS += $(LIBS_y_macos)
endif

ifeq ($(PLATFORM),linux)
CFLAGS += $(CFLAGS_linux) $(CFLAGS_y_linux)
LDFLAGS += $(LDFLAGS_linux) $(LDFLAGS_y_linux)
LIBS += $(LIBS_linux) $(LIBS_y_linux)
endif

ifeq ($(PLATFORM),android)
CFLAGS += $(CFLAGS_android) $(CFLAGS_y_android)
LDFLAGS += $(LDFLAGS_android) $(LDFLAGS_y_android)
LIBS += $(LIBS_y_android)
PREFIX = apk/lib/arm64-v8a/lib
SUFFIX = .so
endif

ifeq ($(PLATFORM),web)
CFLAGS += $(CFLAGS_web) $(CFLAGS_y_web)
LDFLAGS += $(LDFLAGS_web) $(LDFLAGS_y_web)
LIBS += $(LIBS_y_web)
SUFFIX = .html
endif

CFLAGS += $(FLAGS) $(FLAGS_y) $(DISABLE_n) $(CFLAGS_y)
LDFLAGS += $(FLAGS) $(FLAGS_y)
CFLAGS += @(EXTRA_CFLAGS)
LDFLAGS += @(EXTRA_LDFLAGS)

## Macros
!cc = |> ^o CC %b^ $(CC) $(CFLAGS) -o %o -c %f |>
!ld = |> ^ LD %o^ $(CC) -o %o %f $(LDFLAGS_y) $(LDFLAGS) |>
!xd = |> ^ XD %f^ xxd -i %f > %o |>
!cp = |> ^ CP %b^ cp %f %o |>