OSM ?= lithuania-latest.osm.pbf
WHERE ?= name='Visinčia' OR name='Šalčia' OR name='Nemunas' OR name='Merkys'
#WHERE ?= name like '%'
SLIDES = slides-2021-03-29.pdf

# Max figure size (in meters) is when it's width is TEXTWIDTH_CM on scale 1:25k
SCALEDWIDTH = $(shell awk '/^TEXTWIDTH_CM/{print 25000/100*$$3}' layer2img.py)

##############################################################################
# These variables have to come before first use due to how macros are expanded
##############################################################################

NON_ARCHIVABLES = notes.txt referatui.txt slides-2021-03-29.txt
ARCHIVABLES = $(filter-out $(NON_ARCHIVABLES),$(shell git ls-files .))

FIGURES = \
		  test-figures \
		  fig8-definition-of-a-bend \
		  fig5-gentle-inflection-before \
		  fig5-gentle-inflection-after \
		  inflection-1-gentle-inflection-before \
		  inflection-1-gentle-inflection-after \
		  fig6-selfcrossing-before \
		  fig6-selfcrossing-after \
		  selfcrossing-1-before \
		  selfcrossing-1-after

RIVERS = \
		 salvis-25k \
		 salvis-50k \
		 salvis-250k

#################################
# The thesis, publishable version
#################################

mj-msc-full.pdf: mj-msc.pdf version.inc.tex $(ARCHIVABLES) ## Thesis for publishing
	cp $< .tmp-$@
	for f in $^; do \
		if [ "$$f" = "$<" ]; then continue; fi; \
		pdfattach .tmp-$@ $$f .tmp2-$@; \
		mv .tmp2-$@ .tmp-$@; \
	done
	mv .tmp-$@ $@

###############################
# Auxiliary targets for humans
###############################

.PHONY: test
test: .faux_test ## Unit tests (fast)

.PHONY: test-rivers
test-rivers: .faux_test-rivers ## Rivers tests (slow)

.PHONY: slides
slides: $(SLIDES)

###########################
# The report, quick version
###########################

mj-msc.pdf: mj-msc.tex version.inc.tex vars.inc.tex extract-and-generate bib.bib \
	$(addsuffix .pdf,$(FIGURES)) $(addsuffix .pdf,$(RIVERS))
	latexmk -shell-escape -g -pdf $<

############################
# Report's test dependencies
############################

define FIG_template
$(1).pdf: layer2img.py Makefile $(2)
	python ./layer2img.py --outfile=$(1).pdf \
		$$(if $$($(1)_WIDTHDIV),--widthdiv=$$($(1)_WIDTHDIV)) \
		$$(foreach i,1 2 3, \
			$$(if $$($(1)_$$(i)SELECT),--group$$(i)-select="$$($(1)_$$(i)SELECT)") \
			$$(if $$($(1)_$$(i)LINESTYLE),--group$$(i)-linestyle="$$($(1)_$$(i)LINESTYLE)") \
	)
endef
$(foreach fig,$(FIGURES),$(eval $(call FIG_template,$(fig),.faux_test)))
$(foreach fig,$(RIVERS), $(eval $(call FIG_template,$(fig),.faux_test-rivers)))

test-figures_1SELECT = wm_figures

fig8-definition-of-a-bend_1SELECT = wm_debug where name='fig8' AND stage='bbends' AND gen=1
fig8-definition-of-a-bend_2SELECT = wm_debug where name='fig8' AND stage='bbends-polygon' AND gen=1

fig5-gentle-inflection-before_WITHDIV = 2
fig5-gentle-inflection-before_1SELECT = wm_debug where name='fig5' AND stage='bbends' AND gen=1
fig5-gentle-inflection-before_2SELECT = wm_debug where name='fig5' AND stage='bbends-polygon' AND gen=1
fig5-gentle-inflection-after_WITHDIV = 2
fig5-gentle-inflection-after_1SELECT = wm_debug where name='fig5' AND stage='cinflections' AND gen=1
fig5-gentle-inflection-after_2SELECT = wm_debug where name='fig5' AND stage='cinflections-polygon' AND gen=1

inflection-1-gentle-inflection-before_WIDTHDIV = 2
inflection-1-gentle-inflection-before_1SELECT = wm_debug where name='inflection-1' AND stage='bbends' AND gen=1
inflection-1-gentle-inflection-before_2SELECT = wm_debug where name='inflection-1' AND stage='bbends-polygon' AND gen=1
inflection-1-gentle-inflection-after_WIDTHDIV = 2
inflection-1-gentle-inflection-after_1SELECT = wm_debug where name='inflection-1' AND stage='cinflections' AND gen=1
inflection-1-gentle-inflection-after_2SELECT = wm_debug where name='inflection-1' AND stage='cinflections-polygon' AND gen=1

fig6-selfcrossing-before_WIDTHDIV = 2
fig6-selfcrossing-before_1SELECT = wm_debug where name='fig6' AND stage='bbends' AND gen=1
fig6-selfcrossing-before_2SELECT = wm_visuals where name='fig6-baseline'
fig6-selfcrossing-before_2LINESTYLE = dotted
fig6-selfcrossing-before_3SELECT = wm_visuals where name='fig6-newline'
fig6-selfcrossing-after_WIDTHDIV = 2
fig6-selfcrossing-after_1SELECT = wm_debug where name='fig6' AND stage='dcrossings' AND gen=1

selfcrossing-1-before_WIDTHDIV = 2
selfcrossing-1-before_1SELECT = wm_debug where name='selfcrossing-1' AND stage='bbends' AND gen=1
selfcrossing-1-before_2SELECT = wm_visuals where name='selfcrossing-1-baseline'
selfcrossing-1-before_2LINESTYLE = dotted
selfcrossing-1-before_3SELECT = wm_visuals where name='selfcrossing-1-newline'
selfcrossing-1-after_WIDTHDIV = 2
selfcrossing-1-after_1SELECT = wm_debug where name='selfcrossing-1' AND stage='dcrossings' AND gen=1
selfcrossing-1-after_2SELECT = wm_debug where name='selfcrossing-1' AND stage='bbends' AND gen=1
selfcrossing-1-after_2LINESTYLE = invisible

salvis-25k_1SELECT = wm_rivers where name='Šalčia' OR name='Visinčia'
salvis-25k_WIDTHDIV = 1

salvis-50k_1SELECT = wm_rivers where name='Šalčia' OR name='Visinčia'
salvis-50k_WIDTHDIV = 2

salvis-250k_1SELECT = wm_rivers where name='Šalčia' OR name='Visinčia'
salvis-250k_WIDTHDIV = 10

.faux_test-rivers: tests-rivers.sql wm.sql Makefile .faux_db
	bash db -v scaledwidth=$(SCALEDWIDTH) -f $<
	touch $@

.faux_test: tests.sql wm.sql .faux_db
	bash db -f $<
	touch $@

.faux_db: db init.sql
	bash db start
	bash db -f init.sql -f rivers.sql
	touch $@

################################
# Report's non-test dependencies
################################

REF = $(shell git describe --abbrev=12 --always --dirty)
version.inc.tex: Makefile $(shell git rev-parse --git-dir 2>/dev/null)
	TZ=UTC date '+\gdef\VCDescribe{%F ($(REF))}%' > $@

vars.inc.tex: vars.awk wm.sql Makefile
	awk -f $< wm.sql

###############
# Misc commands
###############

slides-2021-03-29.pdf: slides-2021-03-29.txt
	pandoc -t beamer -i $< -o $@

dump-debug_wm.sql.xz:
	docker exec -ti wm-mj pg_dump -Uosm osm -t wm_devug | xz -v > $@

release.zip: mj-msc.tex version.inc.tex vars.inc.tex \
	$(addsuffix .pdf,$(FIGURES)) $(addsuffix .pdf,$(RIVERS)) \
	$(shell git ls-files .)
	-rm $@
	zip $@ $^


mj-msc-gray.pdf: mj-msc.pdf
	gs \
		-sOutputFile=$@ \
		-sDEVICE=pdfwrite \
		-sColorConversionStrategy=Gray \
		-dProcessColorModel=/DeviceGray \
		-dCompatibilityLevel=1.4 \
		-dNOPAUSE \
		-dBATCH \
		$<

.PHONY: clean
clean: ## Clean the current working directory
	-bash db stop
	-rm -r .faux_test .faux_aggregate-rivers .faux_test-rivers .faux_db \
		version.inc.tex vars.inc.tex version.aux version.fdb_latexmk \
		_minted-mj-msc \
		$(shell git ls-files -o mj-msc*) \
		$(addsuffix .pdf,$(FIGURES)) \
		$(addsuffix .pdf,$(RIVERS)) \
		$(SLIDES)

.PHONY: clean-tables
clean-tables: ## Remove tables created during unit or rivers tests
	bash db -c '\dt wm_*' | awk '/_/{print "drop table "$$3";"}' | bash db -f -
	-rm .faux_db

.PHONY: help
help: ## Print this help message
	@awk -F':.*?## ' '/^[a-z0-9.-]*: *.*## */{printf "%-18s %s\n",$$1,$$2}' $(MAKEFILE_LIST)

.PHONY: wc
wc: mj-msc.pdf ## Character and page count
	@pdftotext $< - | \
		awk '/\yReferences\y/{exit}; {print}' | \
		tr -d '[:space:]' | wc -c | \
		awk '{printf("Chars: %d, pages: %.1f\n", $$1, $$1/1500)}'

$(OSM):
	wget http://download.geofabrik.de/europe/$@

.PHONY: refresh-rivers
refresh-rivers: aggregate-rivers.sql $(OSM) .faux_db ## Refresh rivers.sql from Open Street Maps
	PGPASSWORD=osm osm2pgsql -c --multi-geometry -H 127.0.0.1 -d osm -U osm $(OSM)
	bash db -v where="$(WHERE)" -f $<
	(\
		echo '-- Generated at $(shell TZ=UTC date +"%FT%TZ") on $(shell whoami)@$(shell hostname -f)'; \
		echo '-- Select: $(WHERE)'; \
		docker exec wm-mj pg_dump --clean -Uosm osm -t wm_rivers | tr -d '\r' \
	) > rivers.sql.tmp
	mv rivers.sql.tmp rivers.sql