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

GENERATED_DIR?=generated
SENTINEL=$(GENERATED_DIR)/.sentinel

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: $(SENTINEL)
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

RAW_DECK_LIST=$(shell ./scripts/decklist.sh) first second third
DECK_LIST=$(RAW_DECK_LIST:%=$(GENERATED_DIR)/%)
DECK_DEPENDENCIES=$(DECK_LIST:%=%.d)

$(SENTINEL): cards.sql
	./scripts/generate_cards.sh $(GENERATED_DIR)
	-rm $(GENERATED_DIR)/first.list
	-rm $(GENERATED_DIR)/second.list
	-rm $(GENERATED_DIR)/third.list
	for card in legs/first/*.tex; do echo $${card%tex}pdf >> $(GENERATED_DIR)/first.list; done
	for card in legs/second/*.tex; do echo $${card%tex}pdf >> $(GENERATED_DIR)/second.list; done
	for card in legs/third/*.tex; do echo $${card%tex}pdf >> $(GENERATED_DIR)/third.list; done
	touch $@

%.d: %.list
	echo -n 'outputs/$(*F).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@' >> $@
	mkdir -p outputs/$(*D)
	echo 'decks: outputs/$(*F).pdf' >> $@

Makefile.deps: $(DECK_DEPENDENCIES) $(SENTINEL)
	cat $^ > $@

-include Makefile.deps

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

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

export: outputs/cardback.png
export: outputs/iditaboard[face].png
export: instructions.pdf

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

# TODO: Clean this up!
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
	-rm -rf $(GENERATED_DIR)
	-rm Makefile.deps

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 $@