# Variables
temp_sed_file:=$(shell mktemp).sed
temp_svg_file:=$(shell mktemp).svg
ifdef dark
	ifneq ($(wildcard $(dark)),)
		dark_mime:=$(shell file -bN --mime-type $(dark))
		dark_color?=transparent
	else
		dark_color:=$(dark)
	endif
endif
ifdef light
	ifneq ($(wildcard $(light)),)
		light_mime:=$(shell file -bN --mime-type $(light))
		light_color?=transparent
	else
		light_color:=$(light)
	endif
endif
ifdef middle
	ifneq ($(wildcard $(middle)),)
		middle_mime:=$(shell file -bN --mime-type $(middle))
		middle_color?=transparent
	else
		middle_color:=$(middle)
	endif
endif
size?=1024
dark_color?=black
light_color?=white
middle_color?=transparent

# Base targets
default: build

# Build process
build: clean logo.svg
	@cp logo.svg $(temp_svg_file)
	@echo 's|fill: black|:fill1:|' >> $(temp_sed_file)
	@echo 's|fill: white|:fill2:|' >> $(temp_sed_file)
	@echo 's|fill: gray|:fill3:|' >> $(temp_sed_file)
	@echo 's|:fill1:|fill: $(dark_color)|' >> $(temp_sed_file)
	@echo 's|:fill2:|fill: $(light_color)|' >> $(temp_sed_file)
	@echo 's|:fill3:|fill: $(middle_color)|' >> $(temp_sed_file)
	@echo 's|dark.png|:image1:|' >> $(temp_sed_file)
	@echo 's|light.png|:image2:|' >> $(temp_sed_file)
	@echo 's|middle.png|:image3:|' >> $(temp_sed_file)
ifdef dark_mime
	@echo -n 's|:image1:|data:$(dark_mime);base64,' >> $(temp_sed_file)
	@base64 -w0 < $(dark) >> $(temp_sed_file)
	@echo '|' >> $(temp_sed_file)
else
	@echo 's|:image1:|$(dark)|' >> $(temp_sed_file)
endif
ifdef light_mime
	@echo -n 's|:image2:|data:$(light_mime);base64,' >> $(temp_sed_file)
	@base64 -w0 < $(light) >> $(temp_sed_file)
	@echo '|' >> $(temp_sed_file)
else
	@echo 's|:image2:|$(light)|' >> $(temp_sed_file)
endif
ifdef middle_mime
	@echo -n 's|:image3:|data:$(middle_mime);base64,' >> $(temp_sed_file)
	@base64 -w0 < $(middle) >> $(temp_sed_file)
	@echo '|' >> $(temp_sed_file)
else
	@echo 's|:image3:|$(middle)|' >> $(temp_sed_file)
endif
	sed -i -f $(temp_sed_file) -- $(temp_svg_file)
	convert -background none -size $(size)x$(size) $(temp_svg_file) logo.png
clean:
	@rm -f logo.png temp.svg

# Linting
lint: xmllint
xmllint: logo.svg
	xmllint --noout logo.svg