.PHONY: all clean check printrun cardrun
.PRECIOUS: %.pdf %.png

default: check decks
all: check decks export

# Check existence of necessary executables
CONVERT:=$(shell command -v convert 2> /dev/null)
XELATEX:=$(shell command -v xelatex 2> /dev/null)
PDFTOPPM:=$(shell command -v pdftoppm 2> /dev/null)
PDFUNITE:=$(shell command -v pdfunite 2> /dev/null)

check:
ifndef CONVERT
	$(error "convert not found. Please install imagemagick")
endif
ifndef XELATEX
	$(error "xelatex not found. Please install xetex")
endif
ifndef PDFTOPPM
	$(error "pdftoppm not found. Please install poppler")
endif
ifndef PDFUNITE
	$(error "pdfunite not found. Please install poppler")
endif

SHORT_DECKLIST=$(shell ls cards/decks | grep -v run | sed -e 's/.txt//')
DECKLIST=$(SHORT_DECKLIST) printrun cardrun
DEPENDLIST=$(DECKLIST:%=%.d)

outputs/printrun.txt: $(SHORT_DECKLIST)
	cat $^ | sort > $@

outputs/cardrun.txt: $(SHORT_DECKLIST)
	cat $^ | sort -u > $@

outputs/%run.d: cards/decks/%run.txt
	echo -n 'outputs/$*run.pdf:' > $@
	tr '\n' ' ' < $< >> $@
	echo -e '\n\tpdfunite $$+ $$@' >> $@
	cat $< | sort | uniq -c | sed -e 's@\([[:digit:]]\+\) \(.\+/\)*\(.\+\).pdf@export: outputs/$*run/\3[\1].png@' >> $@
	cat $< | sort | uniq -c | sed -e 's@\([[:digit:]]\+\) \(.\+/\)*\(.\+\).pdf@outputs/$*run/\3[\1].png: \2\3[\1].png; cp \2\3[\1].png outputs/$*run/\3[\1].png@' >> $@
	mkdir -p outputs/$*run
	echo 'decks: outputs/$*run.pdf' >> $@

outputs/%.d: cards/decks/%.txt
	echo -n 'outputs/$*.pdf:' > $@
	tr '\n' ' ' < $< >> $@
	echo -e '\n\tpdfunite $$+ $$@' >> $@
	cat $< | sort | uniq -c | sed -e 's@\([[:digit:]]\+\) \(.\+/\)*\(.\+\).pdf@export: outputs/$*/\3[\1].png@' >> $@
	cat $< | sort | uniq -c | sed -e 's@\([[:digit:]]\+\) \(.\+/\)*\(.\+\).pdf@outputs/$*/\3[\1].png: \2\3[\1].png; cp \2\3[\1].png outputs/$*/\3[\1].png@' >> $@
	mkdir -p outputs/$*
	echo 'decks: outputs/$*.pdf' >> $@
	echo 'short: outputs/$*.pdf' >> $@

include $(DECKLIST:%=outputs/%.d)

outputs/iditaboard[face].png: iditaboard.pdf
	$(PDFTOPPM) -scale-to-x 4875 -scale-to-y 3075 -png $< > $@

outputs/cardback.png: cardback.png
	cp $< $@

outputs/stretchback1.png: cardback.png
	convert $< -fuzz 50% -fill \#7FDF7D -opaque white tmp.png
	convert tmp.png -fuzz 50% -fill \#CF5FCF -opaque black $@
	rm tmp.png

outputs/stretchback2.png: cardback.png
	convert $< -fuzz 50% -fill \#9FB76F -opaque white tmp.png
	convert tmp.png -fuzz 50% -fill \#FF5F5F -opaque black $@
	rm tmp.png

outputs/stretchback3.png: cardback.png
	convert $< -fuzz 50% -fill \#5F5FFF -opaque white tmp.png
	convert tmp.png -fuzz 50% -fill \#9F9F9F -opaque black $@
	rm tmp.png

outputs/stretchback4.png: cardback.png
	convert $< -fuzz 50% -fill \#3FDFDF -opaque white tmp.png
	convert tmp.png -fuzz 50% -fill \#DFDF3F -opaque black $@
	rm tmp.png

outputs/box[top].png: box_top.png
	cp $< $@

outputs/box[bottom].png: box_bottom.png
	cp $< $@

export: outputs/stretchback1.png outputs/stretchback2.png outputs/stretchback3.png outputs/stretchback4.png
export: outputs/cardback.png
export: outputs/box[top].png outputs/box[bottom].png
export: outputs/iditaboard[face].png
export: instructions.pdf

%.pdf: %.tex
	$(XELATEX) -interaction=batchmode -halt-on-error --shell-escape --output-directory=$(@D) $<
	echo "$@" >> changelist.txt
	rm $*.aux
	rm $*.log

instructions.pdf: instructions.tex cards/dogs/husky0.pdf cards/attachments/armour0.pdf cards/food/breakfast0.pdf cards/food/lunch0.pdf cards/sleds/repair_sled0.pdf cards/sleds/upgrade_sled0.pdf cards/movement/move0.pdf cards/food/dinner0.pdf cards/personal/first_aid0.pdf cards/dogs/good_dog0.pdf cards/util/vigilance.pdf cards/damaged.pdf cards/util/daylight_savings_time.pdf cards/util/sleeping_bag.pdf cards/sleds/new_sled.pdf cards/sleds/stop_and_shop.pdf cards/sleds/satiated.pdf cards/personal/ibuprofin.pdf cards/util/utility_knife.pdf
	$(XELATEX) -interaction=batchmode -halt-on-error --shell-escape --output-directory=$(@D) $<
	$(XELATEX) -interaction=batchmode -halt-on-error --shell-escape --output-directory=$(@D) $< # Twice, for TOC

force-make:

clean:
	-find cards -name '*.pdf' -delete
	-find cards -name '*].png' -delete
	-find cards -name '*-raw.png' -delete
	-find outputs -name '*.pdf' -delete
	-find outputs -name '*].png' -delete
	-find outputs -name '*.d' -delete
	-find . -name '*.aux' -delete
	-find . -name '*.log' -delete

print-%  : ; @echo $* = $($*)

# Rules for each multiplicity of png
%[1].png: %.pdf; ./cardtopng.sh $@
%[2].png: %.pdf; ./cardtopng.sh $@
%[3].png: %.pdf; ./cardtopng.sh $@
%[4].png: %.pdf; ./cardtopng.sh $@
%[5].png: %.pdf; ./cardtopng.sh $@
%[6].png: %.pdf; ./cardtopng.sh $@
%[7].png: %.pdf; ./cardtopng.sh $@
%[8].png: %.pdf; ./cardtopng.sh $@
%[9].png: %.pdf; ./cardtopng.sh $@
%[10].png: %.pdf; ./cardtopng.sh $@
%[11].png: %.pdf; ./cardtopng.sh $@
%[12].png: %.pdf; ./cardtopng.sh $@
%[13].png: %.pdf; ./cardtopng.sh $@
%[14].png: %.pdf; ./cardtopng.sh $@
%[15].png: %.pdf; ./cardtopng.sh $@
%[16].png: %.pdf; ./cardtopng.sh $@
%[17].png: %.pdf; ./cardtopng.sh $@
%[18].png: %.pdf; ./cardtopng.sh $@
%[19].png: %.pdf; ./cardtopng.sh $@
%[20].png: %.pdf; ./cardtopng.sh $@
%[21].png: %.pdf; ./cardtopng.sh $@
%[22].png: %.pdf; ./cardtopng.sh $@
%[23].png: %.pdf; ./cardtopng.sh $@
%[24].png: %.pdf; ./cardtopng.sh $@
%[25].png: %.pdf; ./cardtopng.sh $@
%[26].png: %.pdf; ./cardtopng.sh $@
%[27].png: %.pdf; ./cardtopng.sh $@
%[28].png: %.pdf; ./cardtopng.sh $@
%[29].png: %.pdf; ./cardtopng.sh $@
%[30].png: %.pdf; ./cardtopng.sh $@
%[31].png: %.pdf; ./cardtopng.sh $@
%[32].png: %.pdf; ./cardtopng.sh $@
%[33].png: %.pdf; ./cardtopng.sh $@
%[34].png: %.pdf; ./cardtopng.sh $@
%[35].png: %.pdf; ./cardtopng.sh $@
%[36].png: %.pdf; ./cardtopng.sh $@
%[image].png: %.pdf; ./cardtopng.sh $@