$(eval HOSTNAME=$(shell hostname))
NIXOS_CONFIG := $(PWD)/nixos/$(HOSTNAME)-$(USER).nix
HOMEMANAGER_CONFIG := $(PWD)/home/$(HOSTNAME)-$(USER).nix
CONFIG_DIR := $(if $(XDG_CONFIG_HOME), $(XDG_CONFIG_HOME), $(HOME)/.config)
SSH_DIR := $(HOME)/.ssh

CONFIG_ITEMS := $(wildcard config/*)
CONFIG_TARGETS := $(CONFIG_ITEMS:config/%=$(CONFIG_DIR)/%)
SSH_ITEMS := $(wildcard ssh/*)
SSH_TARGETS := $(SSH_ITEMS:ssh/%=$(SSH_DIR)/%)

.PHONY: default all clean check directories link home install

default: directories link

all: default install home

clean:
	for link in $(CONFIG_TARGETS); do rm "$$link"; done
	for link in $(SSH_TARGETS); do rm "$$link"; done
	rm $(HOME)/.inputrc
	rm -rf $(HOME)/.local/share/nvim

directories: $(CONFIG_DIR) $(SSH_DIR)

$(CONFIG_DIR) $(SSH_DIR) $(CONFIG_DIR)/home-manager:
	mkdir -p $@

link: $(CONFIG_TARGETS) $(SSH_DIR)/config.d $(HOME)/.inputrc

$(CONFIG_TARGETS): $(CONFIG_DIR)/%: config/%
$(SSH_DIR)/config.d: $(SSH_DIR)/%: ssh/%
$(HOME)/.inputrc: $(HOME)/%: %
$(CONFIG_TARGETS) $(SSH_DIR)/config.d $(HOME)/.inputrc:
	ln -s $(PWD)/$? $@

home: $(CONFIG_DIR)/home-manager/home.nix

$(CONFIG_DIR)/home-manager/home.nix: $(CONFIG_DIR)/home-manager
	ln -s $(HOMEMANAGER_CONFIG) $@

install: /nix /etc/nixos/$(HOSTNAME)-$(USER).nix

/etc/nixos/$(HOSTNAME)-$(USER).nix:
	[ -f $(NIXOS_CONFIG) ] || touch $(NIXOS_CONFIG)
	sudo ln -s $(NIXOS_CONFIG) $@

/nix:
	command -v nix > /dev/null && echo "Nix already installed" || sh <(curl -L https://nixos.org/nix/install) --daemon