# --- Configuration ---
IMAGE_NAME := audio-engine-hub
TAG := latest
# Default internal application port (exposed to Traefik)
PORT := 8000
# Traefik's external entrypoints
TRAEFIK_WEB_PORT := 80
TRAEFIK_DASHBOARD_PORT := 8080

# --- Port Checking Functions ---

# Function to check if required Traefik ports are free
# Exits if any are busy, does not suggest alternatives.
define check_traefik_ports_free
	@echo "Checking if Traefik ports ($(TRAEFIK_WEB_PORT}, $(TRAEFIK_DASHBOARD_PORT}) are free..." >&2
	@local busy_ports=""; \
	if ss -tulnp | grep ":$(TRAEFIK_WEB_PORT) " > /dev/null; then \
		busy_ports="$$busy_ports $(TRAEFIK_WEB_PORT)"; \
	fi; \
	if ss -tulnp | grep ":$(TRAEFIK_DASHBOARD_PORT) " > /dev/null; then \
		busy_ports="$$busy_ports $(TRAEFIK_DASHBOARD_PORT)"; \
	fi; \
	if [ -n "$$busy_ports" ]; then \
		echo "ERROR: The following Traefik ports are already in use: $$busy_ports. Please free them or stop Traefik if already running." >&2; \
		exit 1; \
	fi; \
	@echo "Traefik ports are free." >&2
endef

# Function to find next free host port for the app and ask user
# This function will echo the chosen port if successful, or exit with an error.
define check_app_port_free
	@local start_port=$(PORT); \
	local found_port=$$start_port; \
	local is_free=false; \
	\
	if ! ss -tulnp | grep ":$$start_port " > /dev/null; then \
		echo "$$start_port"; \
		exit 0; \
	fi; \
	\
	echo "Port $$start_port is busy. Searching for a free port for the app..." >&2; \
	while ! $$is_free; do \
		if ! ss -tulnp | grep ":$$found_port " > /dev/null; then \
			is_free=true; \
		else \
			((found_port++)); \
			if [ "$$found_port" -gt 65535 ]; then \
				echo "ERROR: No free ports found up to 65535. Aborting." >&2; \
				exit 1; \
			fi; \
		fi; \
	done; \
	\
	echo "Port $$start_port is busy. I found port $$found_port to be free for the app." >&2; \
	read -p "Do you want to use port $$found_port for the app? (y/N): " choice; \
	case "$$choice" in \
		y|Y ) \
			echo "$$found_port"; \
			;; \
		* ) \
			echo "Operation cancelled by user." >&2; \
			exit 1; \
			;; \
	esac;
endef

# --- Docker Commands ---

.PHONY: build
build:
	@echo "Building Docker image: $(IMAGE_NAME):$(TAG)"
	docker build -t $(IMAGE_NAME):$(TAG) .

.PHONY: run
run:
	@export SELECTED_HOST_PORT=$$(bash -c 'func() { $(check_app_port_free) }; func') && \
	echo "Using host port $$SELECTED_HOST_PORT for single app container" && \
	docker run -d -p $$SELECTED_HOST_PORT:$(PORT) --name $(IMAGE_NAME) $(IMAGE_NAME):$(TAG)

.PHONY: stop
stop:
	@echo "Stopping Docker container: $(IMAGE_NAME)"
	docker stop $(IMAGE_NAME) || true
	docker rm $(IMAGE_NAME) || true

.PHONY: logs
logs:
	@echo "Showing logs for container: $(IMAGE_NAME)"
	docker logs -f $(IMAGE_NAME)

.PHONY: shell
shell:
	@echo "Accessing shell in container: $(IMAGE_NAME)"
	docker exec -it $(IMAGE_NAME) /bin/bash

# --- Docker Compose Commands ---

.PHONY: up
up:
	$(call check_traefik_ports_free) # Check Traefik ports before starting
	@echo "Starting development environment with Docker Compose (Traefik enabled)..."
	docker-compose up --build -d

.PHONY: down
down:
	@echo "Stopping development environment with Docker Compose..."
	docker-compose down

# --- Image Management ---

.PHONY: tag
tag:
	@echo "Tagging image $(IMAGE_NAME):$(TAG) as $(REGISTRY)/$(IMAGE_NAME):$(TAG)"
	docker tag $(IMAGE_NAME):$(TAG) $(REGISTRY)/$(IMAGE_NAME):$(TAG)

.PHONY: push
push: tag
	@echo "Pushing image $(REGISTRY)/$(IMAGE_NAME):$(TAG) to registry..."
	docker push $(REGISTRY)/$(IMAGE_NAME):$(TAG)

.PHONY: test
test:
	@echo "Running tests with coverage..."
	pytest --cov=. app/ tests/

# --- Cleanup ---

.PHONY: clean
clean:
	@echo "Cleaning up stopped containers and dangling images..."
	docker container prune -f
	docker image prune -f

.PHONY: help
help:
	@echo "Available commands:"
	@echo "  build   - Build the Docker image"
	@echo "  run     - Run the Docker container (single app, no Traefik)"
	@echo "  stop    - Stop and remove the Docker container"
	@echo "  logs    - Follow the logs of the container"
	@echo "  shell   - Get a shell inside the running container"
	@echo "  up      - Start the dev environment with docker-compose (with Traefik)"
	@echo "  down    - Stop the dev environment with docker-compose"
	@echo "  tag     - Tag the image for a registry"
	@echo "  push    - Push the image to a registry (after tagging)"
	@echo "  clean   - Clean up unused containers and images"
	@echo "  help    - Show this help message"

.DEFAULT_GOAL := help