# Variables
ifdef dark
	dark_color=$(dark)
endif
ifdef light
	light_color=$(light)
endif
ifdef middle
	middle_color=$(middle)
endif
ifneq ($(wildcard $(dark)),)
	dark_color=transparent
endif
ifneq ($(wildcard $(light)),)
	light_color=transparent
endif
ifneq ($(wildcard $(middle)),)
	middle_color=transparent
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
	@sed -i 's|fill: black|:fill1:|' temp.svg
	@sed -i 's|fill: white|:fill2:|' temp.svg
	@sed -i 's|fill: gray|:fill3:|' temp.svg
	@sed -i 's|:fill1:|fill: $(dark_color)|' temp.svg
	@sed -i 's|:fill2:|fill: $(light_color)|' temp.svg
	@sed -i 's|:fill3:|fill: $(middle_color)|' temp.svg
	@sed -i 's|dark.png|:image1:|' temp.svg
	@sed -i 's|light.png|:image2:|' temp.svg
	@sed -i 's|middle.png|:image3:|' temp.svg
	@sed -i 's|:image1:|$(dark)|' temp.svg
	@sed -i 's|:image2:|$(light)|' temp.svg
	@sed -i 's|:image3:|$(middle)|' temp.svg
	convert -background none -size $(size)x$(size) temp.svg logo.png
clean:
	@rm -f logo.png temp.svg

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