##### PARAMS

include Makefile.conf

##### TOOLS

OPENSSL=openssl

TAR=tar
GZIP=gzip

###### DIRS

KEYSDIR = ./keys
CFGDIR = ./configs
TMPDIR = ./tmp

###### FILES

hosts_keys_pub=$(foreach net,$(nets), \
				$(foreach host,$(net_$(net)_hosts), \
					$(KEYSDIR)/$(net)/$(host).pub \
				) \
			)

hosts_keys_priv=$(foreach net,$(nets), \
				$(foreach host,$(net_$(net)_hosts), \
					$(KEYSDIR)/$(net)/$(host).priv \
				) \
			)

hosts_tgz=$(foreach net,$(nets), \
				$(foreach host,$(net_$(net)_hosts), \
					$(CFGDIR)/$(net)/$(host).tar.gz \
				) \
			)

nets_hosts=$(foreach net,$(nets), \
				$(foreach host,$(net_$(net)_hosts), \
					$(TMPDIR)/hosts/$(net)/$(host) \
				) \
			)

.PHONY: all directories misc hosts_keys hosts_tgz clean cleanall cleantmp cleancfg cleankeys

### ALL ###

all: directories hosts_tgz

### CLEAN ###

clean: cleantmp cleancfg
cleanall: clean cleankeys

cleantmp:
	-rm -rv $(TMPDIR)

cleancfg:
	-rm -rv $(CFGDIR)

cleankeys:
	-rm -rv $(KEYSDIR)

### DIRECTORIES ###

directories: $(TMPDIR) $(KEYSDIR) $(CFGDIR)

$(TMPDIR) $(KEYSDIR) $(CFGDIR):
	mkdir -p $@

### MISC ###

misc:
	true

### KEYS

hosts_keys: $(hosts_keys_pub) $(hosts_keys_priv)

$(KEYSDIR)/%.pem:
	mkdir -p $(@D)
	$(OPENSSL) genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:4096 -out $@

$(KEYSDIR)/%.pub: $(KEYSDIR)/%.pem
	$(OPENSSL) rsa -in $(KEYSDIR)/$*.pem -RSAPublicKey_out > $@

$(KEYSDIR)/%.priv: $(KEYSDIR)/%.pem
	$(OPENSSL) rsa -in $(KEYSDIR)/$*.pem -text | sed -ne '/-----BEGIN RSA PRIVATE KEY-----/,/-----END RSA PRIVATE KEY-----/p' > $@

### NETS HOSTS

nets_hosts: hosts_keys $(nets_hosts)

$(TMPDIR)/hosts/%: net=$(firstword $(subst /, ,$*))
$(TMPDIR)/hosts/%: host=$(@F)
$(TMPDIR)/hosts/%: pubkey=$(KEYSDIR)/$(net)/$(host).pub
$(TMPDIR)/hosts/%: pubaddr=$(net_$(net)_$(host)_public_address)
$(TMPDIR)/hosts/%: pubport=$(net_$(net)_$(host)_public_port)
$(TMPDIR)/hosts/%: subnets=$(net_$(net)_$(host)_local_subnets)

$(TMPDIR)/hosts/%:
	@echo hostconf net: $(net)
	@echo hostconf host: $(host)
	@echo hostconf pubkey: $(pubkey)
	@mkdir -p $(@D)
	@echo Generating $@ for $(*F)
	@
	# Add Hostname
	if [ -n "$(pubaddr)" ]; then echo "Address=$(pubaddr)" >> $@ ; fi
	# Add Port
	if [ -n "$(pubport)" ]; then echo "Port=$(pubport)" >> $@ ; fi
	# Add Subnets
	for subnet in $(subnets); do echo Subnet=$$subnet ; done >> $@
	echo "" >> $@
	# Add pubic key
	cat $(pubkey) >> $@

### TINC.CONF

$(TMPDIR)/tinc.conf/%: net=$(firstword $(subst /, ,$*))
$(TMPDIR)/tinc.conf/%: host=$(@F)
$(TMPDIR)/tinc.conf/%:
	@echo tinc.conf net: $(net)
	@echo tinc.conf host: $(host)
	@mkdir -p $(@D)
	@echo Generating $@ for $(*F)
	# Add Hostname
	echo "Name=$(*F)" > $@
	# Add ConnectTo
	for peer in $(net_$(net)_hosts); do if [ "$$peer" != $(host) ]; then echo ConnectTo=$$peer ; fi; done >> $@
	echo "" >> $@

### TINC-UP

$(TMPDIR)/tinc-up/%: net=$(firstword $(subst /, ,$*))
$(TMPDIR)/tinc-up/%: host=$(@F)
$(TMPDIR)/tinc-up/%: localaddr=$(net_$(net)_$(host)_local_address)
$(TMPDIR)/tinc-up/%:
	@echo tinc-up net: $(net)
	@echo tinc-up host: $(host)
	@mkdir -p $(@D)
	@echo Generating $@ for $(*F)
	sed -e 's|^ADDRESS=$$|ADDRESS=$(localaddr)|' scripts/tinc-up > $@

### CONFIG ARCHIVES

hosts_tgz: hosts_keys $(hosts_tgz)

.SECONDEXPANSION:
$(CFGDIR)/%.tar.gz: net=$(firstword $(subst /, ,$*))
$(CFGDIR)/%.tar.gz: host=$(basename $(basename $(@F)))
$(CFGDIR)/%.tar.gz: $(TMPDIR)/tinc.conf/% $(TMPDIR)/tinc-up/% $(nets_hosts)
	@echo Generating $@ for $(net) - $(host)
	@echo hosts_tgz net: $(net)
	@echo hosts_tgz host: $(host)
	@mkdir -p $(@D)
	$(TAR) --append --file $(basename $@) --directory=$(KEYSDIR)/                --transform='s|$(host).priv|rsa_key.priv|' --mode=0600 $(net)/$(host).priv

	$(TAR) --append --file $(basename $@) --directory=$(TMPDIR)/hosts            --transform='s|^$(net)|$(net)/hosts|' $(net)

	$(TAR) --append --file $(basename $@) --directory=$(TMPDIR)/tinc.conf/$(net) --transform='s|$(host)|$(net)/tinc.conf|' $(host)

#	$(TAR) --append --file $(basename $@) --directory=./scripts --transform='s|^|$(net)/|' --mode=0755 tinc-up
	$(TAR) --append --file $(basename $@) --directory=./scripts --transform='s|^|$(net)/|' --mode=0755 tinc-down
	$(TAR) --append --file $(basename $@) --directory=./scripts --transform='s|^|$(net)/|' --mode=0755 subnet-up
	$(TAR) --append --file $(basename $@) --directory=./scripts --transform='s|^|$(net)/|' --mode=0755 subnet-down
	$(TAR) --append --file $(basename $@) --directory=$(TMPDIR)/tinc-up/$(net)   --transform='s|$(host)|$(net)/tinc-up|' --mode=0755 $(host)

	$(GZIP) $(basename $@)