SHELL = /bin/bash
BINDIR = bin
TMPDIR = tmp
DOCDIR = doc
PATH := $(PATH):$(BINDIR)

#  list of itineraries to generate GPX and HTML files from and to crosscheck
ITINERARIES = $(basename $(notdir $(wildcard $(DOCDIR)/*.xls)))
#  list of itineraries whose GPX and HTML files should be installed in the corresponding holiday directories
INSTALLABLE_ITINERARIES = $(ITINERARIES)
#  generator and crosschecker tool
CSV2XXX_CMD = csv2xxx
#  tolerance 0.0001 degrees is fine, but at 0.00011 degrees then it
#  starts thinking different camps are actually the same camps (mainly
#  round Prague).
CSV2XXX_TOLERANCE_OPT = --tolerance=0.0001035
CSV2XXX_MISMATCH_OPT  = 

$(TMPDIR)/camping-guide.kml: $(TMPDIR)/all-gpx-and-html-installed.timestamp

$(TMPDIR)/camping-guide-installed.timestamp: $(TMPDIR)/camping-guide.kml
		scp -q $(TMPDIR)/camping-guide.kml root@vesuvio:/var/www/suzanneramsay.freemyip.com/wp-content/uploads/private/campsite-guide/camping-guide-map.kml

$(TMPDIR)/all-gpx-and-html-installed.timestamp: $(TMPDIR)/all-csv-crosschecked.timestamp $(TMPDIR)/all-gpx-generated.timestamp $(TMPDIR)/all-html-generated.timestamp
	@[ "$(findstring s,$(MAKEFLAGS))" ] || echo "cp $(TMPDIR)/*.gpx ../holidays/.../waypoints/..."
	@[ "$(findstring s,$(MAKEFLAGS))" ] || echo "cp $(TMPDIR)/*.html ../holidays/.../html/..."
	@for GPX in $(TMPDIR)/*.gpx; do \
	    for HOLIDAY_DIR in ../holidays/20????-*; do \
	        [[ $$GPX =~ $(TMPDIR)/(.*)\.gpx ]] || continue; \
	        GPX_STEM=$${BASH_REMATCH[1]}; \
	        [[ $$HOLIDAY_DIR =~ \.\./holidays/20....-(.*) ]] || continue; \
	        HOLIDAY_DIR_STEM=$${BASH_REMATCH[1]}; \
	        [ $$GPX_STEM = $$HOLIDAY_DIR_STEM ] || continue; \
	        cp $$GPX $$HOLIDAY_DIR/waypoints/$$HOLIDAY_DIR_STEM-waypoints-camps.gpx; \
	        cp $${GPX%.gpx}.html $$HOLIDAY_DIR/html/$$HOLIDAY_DIR_STEM-camps.html; \
	    done; \
	done
	touch $@

$(TMPDIR)/all-csv-crosschecked.timestamp: $(TMPDIR)/all-csv-generated.timestamp
	$(CSV2XXX_CMD) $(CSV2XXX_TOLERANCE_OPT) $(CSV2XXX_MISMATCH_OPT) --output-format=null $(TMPDIR)/*.csv
	touch $@

$(TMPDIR)/all-gpx-generated.timestamp: $(addprefix $(TMPDIR)/,$(addsuffix .gpx, $(ITINERARIES)))
	touch $@

$(TMPDIR)/all-csv-generated.timestamp: $(addprefix $(TMPDIR)/,$(addsuffix .csv, $(ITINERARIES)))
	touch $@

$(TMPDIR)/all-html-generated.timestamp: $(addprefix $(TMPDIR)/,$(addsuffix .html, $(ITINERARIES)))
	touch $@

$(TMPDIR)/%.gpx: $(TMPDIR)/%.csv
	$(CSV2XXX_CMD) --output-format=gpx $^ > $@

$(TMPDIR)/%.html: $(TMPDIR)/%.csv
	$(CSV2XXX_CMD) --output-format=html $^ > $@

$(TMPDIR)/%.kml: $(TMPDIR)/%.csv
	@#  Note that camping-guide.kml depends on the .timestamp file that indicates
	@#  all crosschecks have been done, so we need to filter out the .timestamp file.
	$(CSV2XXX_CMD) --output-format=kml $(filter-out %.timestamp, $^) > $@

#  See https://wiki.openoffice.org/wiki/Documentation/DevGuide/Spreadsheets/Filter_Options,
#  especially the examples right at the end of the page. The important bits here are
#  '76' meaning UTF, 'true' meaning 'quote all text fields'
$(TMPDIR)/%.csv: $(DOCDIR)/%.xls
	@[ "$(findstring s,$(MAKEFLAGS))" ] || echo "libreoffice ... --convert-to csv ... $<"
	@libreoffice -env:UserInstallation=file:///var/tmp/$$USER/.libreoffice-alt --headless --convert-to "csv:Text - txt - csv (StarCalc):44,34,76,1,1/1,,true" --outdir $(TMPDIR) $< > /dev/null

clean:
	rm -f $(TMPDIR)/*