#
# The public targets in this Makefile are: build, clean, wipe
#
# What `build` target does:
#
# - build cerbero to build glib, libogg, libvorbis, libflac, and libsndfile.
# - build glib-2.0.so and many other dependency shared libraries
# - build Oboe shared library
# - build libfluidsynth.so
# - build libfluidsynth-assetloader.so
#
# Android app developers are supposed to copy all those shared
# libraries into their apks (per ABI).
#
PWD=$(shell pwd)
CERBERO=$(PWD)/external/cerbero
OBOE=$(PWD)/external/oboe
CMAKE=cmake
JOBS=$(shell nproc)

ANDROID_NDK = $(PWD)/external/cerbero/build/android-ndk-21

ABIS_SIMPLE = x86 x86-64 armv7 arm64


DIST_PATH=$(CERBERO)/build/dist
OBOE_BUILD_PATH=$(OBOE)/build

all: build

.PHONY: prepare
prepare: checkout-oboe checkout-cerbero
	for abi in $(ABIS_SIMPLE) ; do \
		cd $(CERBERO) && ./cerbero-uninstalled -c config/cross-android-$$abi.cbc bootstrap --jobs $(JOBS) && cd $(PWD) ; \
	done

.PHONY: checkout-oboe
checkout-oboe: $(OBOE)
	cd $(OBOE) && git checkout 1.5.0

$(OBOE):
	git clone https://github.com/Google/oboe.git $(OBOE) 

.PHONY: checkout-cerbero
checkout-cerbero: $(CERBERO)
	cd $(CERBERO) && git checkout e9f18b3b340de1648d885a0542d2f06c3fcfffe8

$(CERBERO):
	git clone https://github.com/falrm/cerbero.git $(CERBERO)

.PHONY: build
build: build-oboe dist-oboe build-deps-cerbero dist-deps-cerbero build-fluidsynth dist-fluidsynth build-fluidsynth-assetloader dist-fluidsynth-assetloader

.PHONY: build-deps-cerbero
build-deps-cerbero:
	for abi in $(ABIS_SIMPLE) ; do \
		cd $(CERBERO) && ./cerbero-uninstalled -c config/cross-android-$$abi.cbc build --jobs $(JOBS) glib libsndfile && cd $(PWD) ; \
	done

define run_make_abi_target
	make -f Makefile.android BUILD_ABI=$(1) A_ABI=$(2) $(3)
endef
define run_make_abi_target-unsafe
	if make -f Makefile.android BUILD_ABI=$(1) A_ABI=$(2) $(3) ; then \
		echo "ignore failure for $(1)..." ; \
	fi
endef

define run_make_for_all_abi
	$(call run_make_abi_target,x86,x86,$(1) )
	$(call run_make_abi_target,x86_64,x86_64,$(1) )
	$(call run_make_abi_target,armv7,armeabi-v7a,$(1) )
	$(call run_make_abi_target-unsafe,arm64,arm64-v8a,$(1) )
endef

.PHONY: dist-deps-cerbero
dist-deps-cerbero:
	$(call run_make_for_all_abi, dist-deps-cerbero-one)

.PHONY: dist-fluidsynth
dist-fluidsynth:
	$(call run_make_for_all_abi, dist-fluidsynth-one)

.PHONY: build-oboe
build-oboe:
	$(call run_make_for_all_abi, build-oboe-one)

.PHONY: dist-oboe
dist-oboe:
	$(call run_make_for_all_abi, dist-oboe-one)

.PHONY: build-fluidsynth
build-fluidsynth:
	$(call run_make_for_all_abi, build-fluidsynth-one)

build-fluidsynth-one:
	mkdir -p build/$(A_ABI) && cd build/$(A_ABI) && \
	LD_RUN_PATH=$(DIST_PATH)/android-$(BUILD_ABI)/lib:$(OBOE_BUILD_PATH)/$(A_ABI) \
	LD_LIBRARY_PATH=$(DIST_PATH)/android_$(BUILD_ABI)/lib \
	PKG_CONFIG_PATH=$(DIST_PATH)/android_$(BUILD_ABI)/lib/pkgconfig/:$(OBOE_BUILD_PATH)/$(A_ABI) \
	PKG_CONFIG_LIBDIR=$(DIST_PATH)/android_$(BUILD_ABI)/lib/pkgconfig/:$(OBOE_BUILD_PATH)/$(A_ABI) \
	$(CMAKE) -DCMAKE_INSTALL_PREFIX=$(PWD)/dist/$(A_ABI) \
		-Denable-floats=1 \
		-DCMAKE_VERBOSE_MAKEFILE=1 \
		-DCMAKE_TOOLCHAIN_FILE=$(ANDROID_NDK)/build/cmake/android.toolchain.cmake \
		-Denable-opensles=on -Denable-oboe=on -Denable-oss=off -Denable-libsndfile=on \
		-DANDROID_NATIVE_API_LEVEL=android-27 -DANDROID_PLATFORM=android-27 -DANDROID_ABI=$(A_ABI) ../../../.. && \
	make -j$(JOBS)

build-oboe-one:
	mkdir -p $(OBOE)/build/$(A_ABI) && cd $(OBOE)/build/$(A_ABI) && \
		$(CMAKE) -DCMAKE_TOOLCHAIN_FILE=$(ANDROID_NDK)/build/cmake/android.toolchain.cmake -DANDROID_ABI=$(A_ABI) -DANDROID_NATIVE_API_LEVEL=android-27 -DANDROID_PLATFORM=android-27 -DBUILD_SHARED_LIBS=on ../.. && make -j$(JOBS)
	cp oboe-1.0.pc $(OBOE)/build/$(A_ABI)

dist-oboe-one:
	mkdir -p dist/$(A_ABI) && cp $(OBOE)/build/$(A_ABI)/*.so dist/$(A_ABI)/

dist-deps-cerbero-one:
	mkdir -p dist/$(A_ABI) && cd dist/$(A_ABI) && cp ../../external/cerbero/build/dist/android_$(BUILD_ABI)/lib/*.so . && cd ../..	

dist-fluidsynth-one:
	mkdir -p dist/$(A_ABI) && cd dist/$(A_ABI) && cp ../../build/$(A_ABI)/src/libfluidsynth.so . && cd ../..
	cp -r ../../include/fluidsynth build/$(A_ABI)/include/

build-fluidsynth-assetloader:
	cd fluidsynth-assetloader && ./ext-build.sh

dist-fluidsynth-assetloader:
	cp fluidsynth-assetloader/build/x86/*.so dist/x86/
	cp fluidsynth-assetloader/build/x86_64/*.so dist/x86_64/
	cp fluidsynth-assetloader/build/armeabi-v7a/*.so dist/armeabi-v7a/
	cp fluidsynth-assetloader/build/arm64-v8a/*.so dist/arm64-v8a/

clean:
	rm -rf dist/* build/* external/oboe/build/* obj/local/* fluidsynth-asset-loader/build/*

.PHONY: wipe
wipe: $(CERBERO)
	for abi in $(ABIS_SIMPLE) ; do \
		cd $(CERBERO) && ./cerbero-uninstalled -c config/cross-android-$$abi.cbc wipe && cd ../.. ; \
	done