# Makefile for Nix Home Manager configuration
# Provides convenient targets for testing, building, and applying configurations

# Default target shows help
.DEFAULT_GOAL := help

# Flake reference for configurations
FLAKE_PERSONAL := .#personal
FLAKE_WORK := .#work

# Nix experimental features flag (enables flakes without system config changes)
NIX_FLAGS := --extra-experimental-features 'nix-command flakes'

# ============================================================================
# PHONY TARGETS
# ============================================================================
.PHONY: check show dry-run-personal dry-run-work \
        switch-personal switch-work build-personal build-work \
        update update-nixpkgs gc gc-old \
        fmt lint help

# ============================================================================
# TESTING/VALIDATION
# ============================================================================

## check: Run nix flake check to validate the flake
check:
	nix $(NIX_FLAGS) flake check

## show: Display the flake outputs
show:
	nix $(NIX_FLAGS) flake show

## dry-run-personal: Dry-run build for personal configuration (shows what would be built)
dry-run-personal:
	nix $(NIX_FLAGS) build '.#darwinConfigurations.personal.system' --dry-run

## dry-run-work: Dry-run build for work configuration (shows what would be built)
dry-run-work:
	nix $(NIX_FLAGS) build '.#darwinConfigurations.work.system' --dry-run

# ============================================================================
# BUILDING/APPLYING
# ============================================================================

## switch-personal: Apply personal configuration with darwin-rebuild (requires sudo)
switch-personal:
	nix $(NIX_FLAGS) build '.#darwinConfigurations.personal.system'
	sudo ./result/sw/bin/darwin-rebuild activate

## switch-work: Apply work configuration with darwin-rebuild (requires sudo)
switch-work:
	nix $(NIX_FLAGS) build '.#darwinConfigurations.work.system'
	sudo ./result/sw/bin/darwin-rebuild activate

## build-personal: Build personal configuration without switching
build-personal:
	nix $(NIX_FLAGS) build '.#darwinConfigurations.personal.system'

## build-work: Build work configuration without switching
build-work:
	nix $(NIX_FLAGS) build '.#darwinConfigurations.work.system'

# ============================================================================
# MAINTENANCE
# ============================================================================

## update: Update all flake inputs
update:
	nix $(NIX_FLAGS) flake update

## update-nixpkgs: Update only nixpkgs input
update-nixpkgs:
	nix $(NIX_FLAGS) flake lock --update-input nixpkgs

## gc: Run garbage collection to free disk space
gc:
	nix-collect-garbage

## gc-old: Delete old generations and run garbage collection
gc-old:
	nix-collect-garbage -d

# ============================================================================
# DEVELOPMENT
# ============================================================================

## fmt: Format all Nix files using nixfmt
fmt:
	find . -name '*.nix' -exec nixfmt {} \;

## lint: Run statix linter on Nix files (if available)
lint:
	@command -v statix >/dev/null 2>&1 && statix check . || echo "statix not installed, skipping lint"

# ============================================================================
# HELP
# ============================================================================

## help: Show this help message
help:
	@echo "Nix Home Manager Configuration - Available Targets"
	@echo "=================================================="
	@echo ""
	@echo "Testing/Validation:"
	@echo "  check            - Run nix flake check to validate the flake"
	@echo "  show             - Display the flake outputs"
	@echo "  dry-run-personal - Dry-run build for personal configuration"
	@echo "  dry-run-work     - Dry-run build for work configuration"
	@echo ""
	@echo "Building/Applying:"
	@echo "  switch-personal  - Apply personal configuration with darwin-rebuild (requires sudo)"
	@echo "  switch-work      - Apply work configuration with darwin-rebuild (requires sudo)"
	@echo "  build-personal   - Build personal configuration without switching"
	@echo "  build-work       - Build work configuration without switching"
	@echo ""
	@echo "Maintenance:"
	@echo "  update           - Update all flake inputs"
	@echo "  update-nixpkgs   - Update only nixpkgs input"
	@echo "  gc               - Run garbage collection to free disk space"
	@echo "  gc-old           - Delete old generations and run garbage collection"
	@echo ""
	@echo "Development:"
	@echo "  fmt              - Format all Nix files using nixfmt"
	@echo "  lint             - Run statix linter on Nix files"
	@echo ""
	@echo "Help:"
	@echo "  help             - Show this help message"