# Wokwi Custom Chip Makefile
# Generated by wokwi-cli
#
# Usage:
#   make          - Build the chip
#   make clean    - Remove build artifacts
#   make wokwi-api.h - Download the Wokwi API header
#
# Requirements:
#   - WASI-SDK (https://github.com/WebAssembly/wasi-sdk)
#   - Set WASI_SDK_PATH environment variable or install to ~/.wokwi/wasi-sdk
#

# Configuration
CHIP_NAME ?= heartrate.chip
SOURCES ?= main.c
OUTPUT ?= $(CHIP_NAME).wasm

# WASI-SDK paths
WASI_SDK_PATH ?= /l/disk0/alopes/.wokwi/wasi-sdk
WASI_SDK_VERSION ?= 25

# Compiler settings
CC = $(WASI_SDK_PATH)/bin/clang
SYSROOT = $(WASI_SDK_PATH)/share/wasi-sysroot

# Compilation flags
CFLAGS = --target=wasm32-wasi \
         --sysroot=$(SYSROOT) \
         -nostartfiles \
         -I. \
         -O2

LDFLAGS = -Wl,--no-entry \
          -Wl,--import-memory \
          -Wl,--export-table

# Default target
all: check-sdk wokwi-api.h $(OUTPUT)

# Build the WASM file
$(OUTPUT): $(SOURCES) wokwi-api.h
	@echo "Compiling $(CHIP_NAME)..."
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(SOURCES)
	@echo "Success! Output: $@ ($$(du -h $@ | cut -f1))"

# Check WASI-SDK is available
check-sdk:
	@if [ ! -d "$(WASI_SDK_PATH)" ]; then \
		echo "Error: WASI-SDK not found at $(WASI_SDK_PATH)"; \
		echo ""; \
		echo "Install WASI-SDK:"; \
		echo "  Option 1: Run 'wokwi-cli chip compile' once to auto-install"; \
		echo "  Option 2: Download from https://github.com/WebAssembly/wasi-sdk/releases"; \
		echo "  Option 3: Set WASI_SDK_PATH environment variable"; \
		exit 1; \
	fi

# Download wokwi-api.h if not present
wokwi-api.h:
	@if [ ! -f wokwi-api.h ]; then \
		echo "Downloading wokwi-api.h..."; \
		curl -sL "https://wokwi.com/api/chips/wokwi-api.h" -o wokwi-api.h; \
		echo "Downloaded wokwi-api.h"; \
	fi

# Clean build artifacts
clean:
	rm -f $(OUTPUT)

# Clean everything including downloaded files
distclean: clean
	rm -f wokwi-api.h

.PHONY: all check-sdk clean distclean