ANDROID_HOME ?= $(HOME)/Library/Android/sdk
ADB          := $(ANDROID_HOME)/platform-tools/adb
EMULATOR     := $(ANDROID_HOME)/emulator/emulator
AVD          ?= DC-1
PACKAGE      := net.metacircular.engpad
ACTIVITY     := $(PACKAGE).MainActivity

# Proto generation output directory (checked into git)
PROTO_GEN    := app/src/main/java/gen
PROTO_SRC    := app/src/main/proto

.PHONY: build test lint clean run devrun apk proto proto-lint all

# Build everything (compile + test + lint)
all: lint test build

# Compile debug and release APKs
build:
	./gradlew build

# Run unit tests
test:
	./gradlew test

# Run a single test class: make test-one CLASS=net.metacircular.engpad.data.StrokeBlobTest
test-one:
	./gradlew test --tests "$(CLASS)"

# Run Android lint
lint:
	./gradlew lint

# Build release APK
apk:
	./gradlew assembleRelease
	@echo "APK: app/build/outputs/apk/release/app-release-unsigned.apk"

# Generate Kotlin/gRPC stubs from .proto files
proto:
	@rm -rf $(PROTO_GEN)
	@mkdir -p $(PROTO_GEN)
	protoc \
		--proto_path=$(PROTO_SRC) \
		--proto_path=$$(protoc --print-proto-path 2>/dev/null || echo /usr/local/include) \
		--java_out=lite:$(PROTO_GEN) \
		--kotlin_out=lite:$(PROTO_GEN) \
		--plugin=protoc-gen-grpc=$$(which protoc-gen-grpc-java 2>/dev/null || echo $(HOME)/bin/protoc-gen-grpc-java) \
		--grpc_out=lite:$(PROTO_GEN) \
		--plugin=protoc-gen-grpckt=$(HOME)/bin/protoc-gen-grpckt \
		--grpckt_out=lite:$(PROTO_GEN) \
		$$(find $(PROTO_SRC) -name '*.proto')

# Lint proto files with buf
proto-lint:
	buf lint
	buf breaking --against '.git#branch=master,subdir=$(PROTO_SRC)'

# Clean build artifacts
clean:
	./gradlew clean

# Install and launch on the Android emulator.
# Starts the emulator if it isn't already running.
run: build
	@if ! $(ADB) devices | grep -q emulator; then \
		echo "Starting emulator ($(AVD))..."; \
		$(EMULATOR) -avd $(AVD) -no-snapshot-load &>/dev/null & \
		$(ADB) wait-for-device; \
		echo "Emulator ready."; \
	fi
	./gradlew installDebug
	$(ADB) -e shell am start -n $(PACKAGE)/$(ACTIVITY)

# Install and launch on a connected USB device.
devrun: build
	./gradlew installDebug
	$(ADB) -d shell am start -n $(PACKAGE)/$(ACTIVITY)