# Makefile to use with SDL+Android
# See https://wiki.libsdl.org/SDL3/README/android
# for details on how SDL interacts with Android.
#
# This Makefile assumes you have wget or curl and Python v3 installed.
#
# Running `make -f Makefile.android` will produce these files or directories:
#  - SDL-main.zip
#  - SDL-main
#  - com.imgui.example
#

# Variables
PACKAGE_NAME := com.imgui.sdl3renderer3
VARIANT := copy
VERSION := 0.1.0
URL := https://github.com/libsdl-org/SDL/archive/refs/heads/main.zip
ARCHIVE_NAME := SDL-main.zip
SDL_ROOT := SDL-main
CREATED_ANDROID_PROJECT := $(CURDIR)/$(PACKAGE_NAME)
ANDROID_SRCS_DIR := $(CREATED_ANDROID_PROJECT)/app/jni/src
SDL_PYTHON_SCRIPT := $(SDL_ROOT)/build-scripts/create-android-project.py
IMGUI_ROOT := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))../..)

SOURCES := \
	$(IMGUI_ROOT)/backends/imgui_impl_sdlrenderer3.cpp \
	$(IMGUI_ROOT)/backends/imgui_impl_sdl3.cpp \
	$(IMGUI_ROOT)/imgui.cpp \
	$(IMGUI_ROOT)/imgui_draw.cpp \
	$(IMGUI_ROOT)/imgui_widgets.cpp \
	$(IMGUI_ROOT)/imgui_demo.cpp \
	$(IMGUI_ROOT)/imgui_tables.cpp \
	main.cpp

HEADERS := $(IMGUI_ROOT)/imstb_rectpack.h \
	$(IMGUI_ROOT)/imstb_textedit.h \
	$(IMGUI_ROOT)/imstb_truetype.h \
	$(IMGUI_ROOT)/imgui.h \
	$(IMGUI_ROOT)/imgui_internal.h \
	$(IMGUI_ROOT)/imconfig.h \
	$(IMGUI_ROOT)/backends/imgui_impl_sdl3.h \
	$(IMGUI_ROOT)/backends/imgui_impl_sdlrenderer3.h

# Targets
.PHONY: all clean setup download extract run

all: setup run

clean:
	rm -rf $(SDL_ROOT) $(ARCHIVE_NAME) $(CREATED_ANDROID_PROJECT)

setup: download extract
	@echo "Setting up the Android project..."
	@which python3 > /dev/null || which python > /dev/null || { echo "Error: Python v3 is not installed."; exit 1;}

download:
	@echo "Downloading Android project..."
	wget -O $(ARCHIVE_NAME) $(URL) || curl -L -o $(ARCHIVE_NAME) $(URL)

extract:
	@echo "Extracting Android project..."
	mkdir -p $(SDL_ROOT)
	unzip -o $(ARCHIVE_NAME) -d $(CURDIR)

run:
	@echo "Creating Android project..."
	python3 $(SDL_PYTHON_SCRIPT) --variant $(VARIANT) --output $(CURDIR) $(PACKAGE_NAME) $(SOURCES)
	cp -r $(HEADERS) $(ANDROID_SRCS_DIR)