SRCDIR := src
INCDIR := include
OBJDIR := obj
BINDIR := bin

# Compiler and flags
CC := clang
CFLAGS := -std=c11 -Wall -Wextra -Wpedantic -Werror
CFLAGS += -Wshadow -Wconversion -Wdouble-promotion
CFLAGS += -Wformat=2 -Wundef -fno-common
CFLAGS += -I$(INCDIR)

# Target
TARGET := $(BINDIR)/ascii3d

# Source files
SRCS := $(wildcard $(SRCDIR)/*.c)
OBJS := $(SRCS:$(SRCDIR)/%.c=$(OBJDIR)/%.o)
DEPS := $(OBJS:.o=.d)

# Libraries
LDFLAGS := -lm

# Build modes
.PHONY: all debug release clean install uninstall help

# Default target
all: release

# Release build (optimized)
release: CFLAGS += -O3 -DNDEBUG -march=native -flto
release: LDFLAGS += -flto
release: $(TARGET)

# Debug build (with symbols and sanitizers)
debug: CFLAGS += -O0 -g3 -DDEBUG
debug: CFLAGS += -fsanitize=address,undefined
debug: LDFLAGS += -fsanitize=address,undefined
debug: $(TARGET)

# Profile build (optimized with debug symbols)
profile: CFLAGS += -O2 -g -pg
profile: LDFLAGS += -pg
profile: $(TARGET)

# Create directories
$(OBJDIR) $(BINDIR):
	@mkdir -p $@

# Link
$(TARGET): $(OBJS) | $(BINDIR)
	@echo "Linking $@..."
	@$(CC) $(OBJS) -o $@ $(LDFLAGS)
	@echo "Build complete: $@"

# Compile
$(OBJDIR)/%.o: $(SRCDIR)/%.c | $(OBJDIR)
	@echo "Compiling $<..."
	@$(CC) $(CFLAGS) -MMD -MP -c $< -o $@

# Include dependencies
-include $(DEPS)

# Clean build artifacts
clean:
	@echo "Cleaning..."
	@rm -rf $(OBJDIR) $(BINDIR)
	@echo "Clean complete."

# Install to system
PREFIX ?= /usr/local
install: release
	@echo "Installing to $(PREFIX)/bin..."
	@install -d $(PREFIX)/bin
	@install -m 755 $(TARGET) $(PREFIX)/bin/
	@echo "Installation complete."

# Uninstall from system
uninstall:
	@echo "Uninstalling from $(PREFIX)/bin..."
	@rm -f $(PREFIX)/bin/ascii3d
	@echo "Uninstallation complete."

# Run the program
run: release
	@./$(TARGET)

# Run with demo text
demo: release
	@./$(TARGET) -a HELLO

# Static analysis
analyze:
	@echo "Running static analysis..."
	@cppcheck --enable=all --std=c11 -I$(INCDIR) $(SRCDIR)/*.c

# Format code
format:
	@echo "Formatting code..."
	@clang-format -i $(SRCDIR)/*.c $(INCDIR)/*.h

# Help
help:
	@echo "ASCII 3D Renderer - Build System"
	@echo "================================"
	@echo ""
	@echo "Targets:"
	@echo "  all       - Build release version (default)"
	@echo "  release   - Build optimized release version"
	@echo "  debug     - Build debug version with sanitizers"
	@echo "  profile   - Build with profiling support"
	@echo "  clean     - Remove build artifacts"
	@echo "  install   - Install to system (PREFIX=/usr/local)"
	@echo "  uninstall - Remove from system"
	@echo "  run       - Build and run"
	@echo "  demo      - Build and run demo"
	@echo "  analyze   - Run static analysis (requires cppcheck)"
	@echo "  format    - Format source code (requires clang-format)"
	@echo "  help      - Show this help"
	@echo ""
	@echo "Examples:"
	@echo "  make                    # Build release"
	@echo "  make debug              # Build debug"
	@echo "  make run                # Build and run"
	@echo "  make install PREFIX=~   # Install to home directory"