# ================= COMPILER SETTINGS =================
CC ?= gcc
CFLAGS ?= -Wall -Wextra -Werror -std=c18 -Iinclude -Ibenchmark
LDFLAGS ?=

SRC_DIR := src
TEST_DIR := tests
BENCH_DIR := benchmark
BUILD_DIR := build

SRC := $(SRC_DIR)/syntax_essentials.c benchmark/benchmark.c benchmark/resource_usage.c
TESTS := $(wildcard $(TEST_DIR)/*.c)

OUT_HOST := $(BUILD_DIR)/syntax_essentials_tests_host

# ================= TARGETS =================
all: host

$(BUILD_DIR):
	mkdir -p $(BUILD_DIR)

# ---------------- HOST BUILD (static) ----------------
host: $(BUILD_DIR) $(SRC) $(TESTS)
	$(CC) $(CFLAGS) -static $(SRC) $(TESTS) -o $(OUT_HOST) $(LDFLAGS)
	@echo "[INFO] Host binary built: $(OUT_HOST)"

# ---------------- ESP32 SIM ----------------
esp32_sim: host
	@echo "[INFO] Running ESP32-S3 simulation in minimal Docker..."
	docker build -t esp32-s3-sim .
	docker run --rm --memory=6m --cpus=0.2 esp32-s3-sim

# ---------------- CLEAN ----------------
clean:
	rm -rf $(BUILD_DIR)

# ---------------- INFO ----------------
info:
	@echo "Host compiler: $(CC)"
	@echo "Binary: $(OUT_HOST)"

# ---------------- HELP ----------------
help:
	@echo "Available targets:"
	@echo "  all / host       - Build host binary (statically linked)"
	@echo "  esp32_sim        - Build host binary + run ESP32-S3 Docker simulation"
	@echo "  clean            - Remove build artifacts"
	@echo "  info             - Show compiler and binary info"