# Root directory
AONROOTREL := ../../../../..
AONROOTDIR = $(realpath $(AONROOTREL))
INSTALLDIR := ../FINAL/
# Relative location of the XML files
RELXMLDIR := $(AONROOTDIR)/$(BLANG)/xml/
XMLFILE=$(patsubst %.tex,$(RELXMLDIR)/%.xml,$(SOURCE))
# Relative location of the scripts
RELSCRIPT := $(AONROOTDIR)/common/scripts
# Convert Script
XML2LATEX = $(RELSCRIPT)/gbtolatex.pl
# LaTeX stylesheet
LATEXXSL = $(AONROOTDIR)/common/xsl/latex.xsl

# Define ORIGSERIES unless defined
ORIGSERIES ?= $(SERIES)

# Define ILLUSTRATOR if not defined with a sane default
ILLUSTRATOR ?= williams

# Control debug
AT_0 := @
AT_1 := 
AT = $(AT_$(VERBOSE))

all: $(BASENAME).pdf 

SOURCE=$(BASENAME).tex
ifeq "$(BLANG)" "en"
EXTRAFILES=souvenir.sty
else
EXTRAFILES=ac1.tex crtneg.tex ac2.tex crtpos.tex random.tex ac3.tex \
	souvenir.sty souverbt.sty
endif


# Generate the LaTeX file from the XML file
$(SOURCE): $(XMLFILE) $(XML2LATEX) $(LATEXXSL) tweak.diff
	AONPATH="$(AONROOTDIR)" perl $(XML2LATEX) $(BASENAME) $(BLANG) $@
	$(AT)if ! test -s $(SOURCE) ; then \
		echo "ERROR: Empty file $(SOURCE), check for errors above."  >&2 ; \
		rm -f $(SOURCE) ; \
		exit 1 ; \
	fi
	$(AT)cp $(SOURCE) $(BASENAME)-untweaked.tex
	$(AT)if test -f tweak.diff; then \
		patch $(SOURCE) <tweak.diff ; \
	fi

# Extra TeX files needed for the PDFs
ifeq "$(BLANG)" "en"
# This is for english content:
ac1.tex:
	ln -s ../../shared/$@
ac2.tex:
	ln -s ../../shared/$@
ac3.tex:
	ln -s ../../shared/$@
crtneg.tex:
	ln -s ../../shared/$@
crtpos.tex:
	ln -s ../../shared/$@
else
# This is for other translated content:
ac1.tex:
	ln -s ../../shared/$(BLANG)/$@
ac2.tex:
	ln -s ../../shared/$(BLANG)/$@
ac3.tex:
	ln -s ../../shared/$(BLANG)/$@
crtneg.tex:
	ln -s ../../shared/$(BLANG)/$@
crtpos.tex:
	ln -s ../../shared/$(BLANG)/$@
endif
# Shared across all languages
random.tex:
	ln -s ../../shared/$@
souvenir.sty:
	ln -s ../../shared/$@
souverbt.sty:
	ln -s ../../shared/$@
# Create empty tweak.diff if it does not exist
tweak.diff:
	$(AT)touch tweak.diff

# Symlink the images needed for the PDF; unused images and HTML-specific images are ignored
link-images:
	$(AT)[ -n "$(SERIES)" ] || { echo "Error: SERIES variable not defined. Hint: Review the Makefile"; exit 1; }
	$(AT)[ -n "$(SUBSERIES)" ] || { echo "Error: SUBSERIES variable not defined. Hint: Review the Makefile"; exit 1; }
	$(AT)[ -n "$(BASENAME)" ] || { echo "Error: BASENAME variable not defined. Hint: Review the Makefile"; exit 1; }
	$(AT)echo "Linking images for the book to working directory"
	$(AT)[ -n "$(ILLUSTRATOR)" ] || { echo "Warning: ILLUSTRATOR variable not defined. Some illustrations might be missing. Hint: Review the Makefile"; }
	$(AT)[ ! -n "$(ILLUSTRATOR)" ] || [ -d "$(AONROOTREL)/common/pdf/$(ORIGSERIES)/common/ill/$(ILLUSTRATOR)" ] || \
	{ echo "Warning: Folder $(AONROOTREL)/common/pdf/$(ORIGSERIES)/common/ill/$(ILLUSTRATOR) not found. Some illustrations might be missing."; }
	$(AT)[ ! -n "$(ILLUSTRATOR)" ] || [ ! -d "$(AONROOTREL)/common/pdf/$(ORIGSERIES)/common/ill/$(ILLUSTRATOR)" ] || \
	find $(AONROOTREL)/common/pdf/$(ORIGSERIES)/common/ill/$(ILLUSTRATOR)/ -name "*.pdf" | \
	while read file ; do \
		[ -e "`basename $$file`" ] || ln -s $$file . ; \
	done
ifeq "$(BLANG)" "en"
	$(AT)for images in jpeg png ; do \
		[ ! -d "$(AONROOTREL)/en/$$images/$(SERIES)/$(BASENAME)/" ] || find $(AONROOTREL)/en/$$images/$(SERIES)/$(BASENAME)/ \( -name "*.jpg" -o -name "*.png" \) | \
		while read file ; do \
			[ -e "`basename $$file`" ] || \
			case "`basename $$file`" in \
				back*|bckgrnd*|brdr*|forward*|left*|right*|title*|toc*) ;; \
				ac*|crt*|random*) ;; \
				*) ln -s $$file . ;; \
			esac ; \
		done ; \
	done
	$(AT)[ ! -d "$(AONROOTREL)/en/pdf/$(SERIES)/$(SUBSERIES)" ] || find $(AONROOTREL)/en/pdf/$(SERIES)/$(SUBSERIES)/ -name "*.pdf" | \
	while read file ; do \
		[ -e "`basename $$file`" ] || ln -s $$file . ; \
	done
else
	$(AT)[ -n "$(ORIGSERIES)" ] || { echo "Error: ORIGSERIES variable not defined. Hint: Review the Makefile"; exit 1; }
	$(AT)[ -n "$(ORIGBASENAME)" ] || { echo "Error: ORIGBASENAME variable not defined. Hint: Review the Makefile"; exit 1; }
	$(AT)for images in jpeg png ; do \
		[ ! -d "$(AONROOTREL)/$(BLANG)/$$images/$(SERIES)/$(BASENAME)/" ] || find $(AONROOTREL)/$(BLANG)/$$images/$(SERIES)/$(BASENAME)/ \( -name "*.jpg" -o -name "*.png" \) | \
		while read file ; do \
			[ -e "`basename $$file`" ] || ln -s $$file . ; \
		done ; \
		[ ! -d "$(AONROOTREL)/en/$$images/$(ORIGSERIES)/$(ORIGBASENAME)/" ] || find $(AONROOTREL)/en/$$images/$(ORIGSERIES)/$(ORIGBASENAME)/ \( -name "*.jpg" -o -name "*.png" \) | \
		while read file ; do \
			rootname=`basename $$file | sed -e 's/\..*//'`; \
			[ -e "$$rootname.jpg" ] || [ -e "$$rootname.png" ] || ln -s $$file . ; \
		done ; \
	done
	$(AT)[ ! -d "$(AONROOTREL)/$(BLANG)/pdf/$(SERIES)/$(SUBSERIES)" ] || find $(AONROOTREL)/$(BLANG)/pdf/$(SERIES)/$(SUBSERIES)/ -name "*.pdf" | \
	while read file ; do \
		[ -e "`basename $$file`" ] || ln -s $$file . ; \
	done
	$(AT)[ ! -d "$(AONROOTREL)/en/pdf/$(ORIGSERIES)/$(SUBSERIES)" ] || find $(AONROOTREL)/en/pdf/$(ORIGSERIES)/$(SUBSERIES)/ -name "*.pdf" | \
	while read file ; do \
		[ -e "`basename $$file`" ] || ln -s $$file . ; \
	done
endif
	touch $@

# Convert them using the appropiate script
convert-images: link-images
	$(AT)echo "Converting images to PDF format"
	$(AT)sh ../../convert-images.sh
	touch $@
	
# Final install dir
install: $(INSTALLDIR) all
	$(AT)echo "Copying $(BASENAME).pdf to $(INSTALLDIR)"
	$(AT)cp $(BASENAME).pdf $(INSTALLDIR)

$(INSTALLDIR):
	mkdir $@


dvi: $(BASENAME).dvi 
%.dvi: %.tex $(EXTRAFILES)
	latex $<
	latex -interaction batch $<
	# Regenerate Contents
	latex $<

%.ps: %.dvi
	dvips -Ppdf $<

#%.pdf: %.ps
#        ps2pdf $< $@

pdf: $(BASENAME).pdf 
%.pdf: %.tex $(EXTRAFILES) convert-images
# Convert to UTF-8 if required
	$(AT)if file $< | grep -q ISO-8859 ; then \
		echo "WARNING: $< is encoded in ISO-8859-1, converting to UTF-8" ; \
		mv $< $<.lat1;  \
		iconv -f latin1 -t utf-8 < $<.lat1  >$<; \
	fi
	-xelatex -interaction batchmode $<
#	# Remove everything except for chapter entries from the toc file
	$(AT)[ -e "$(BASENAME).toc" ] || { echo "ERROR: Generated file does not include table of contents file, please review $(BASENAME).log" ; false ; }
	-$(AT)grep '{chapter}' $(BASENAME).toc >temp.toc && mv -f temp.toc $(BASENAME).toc
#	# Run xelatex a second time to get correct page numbers in the toc
	-xelatex -interaction batchmode $<
#	# Remove everything except for chapter entries from the toc file
	-$(AT)grep '{chapter}' $(BASENAME).toc >temp.toc && mv -f temp.toc $(BASENAME).toc 
#	# Tweak the PDF bookmarks file
	$(AT)[ -e "$(BASENAME).out" ] || { echo "ERROR: Required file $(BASENAME).out does not exist, please review $(BASENAME).log" ; false ; }
	$(AT)sed 's/\\ellipsis@one =,//' $(BASENAME).out >temp.out && \
		echo '\let\WriteBookmarks\relax' >>temp.out && \
		mv -f temp.out $(BASENAME).out
#	# Run xelatex a third time to get correct PDF bookmarks
	-xelatex -interaction batchmode $<
# Restore the original ISO-8859-1 file if we used iconf
	$(AT)[ ! -e "$<.lat1" ] || mv $<.lat1 $<

pdflatex: $(BASENAME).tex $(EXTRAFILES) convert-images
#	# Remove old PDF bookmarks file (.out file)
	-rm -f $(BASENAME).out
#	# Use pdflatex for generation:
	-pdflatex -interaction batchmode $<
#	# Remove everything except for chapter entries from the toc file
	$(AT)[ -e "$(BASENAME).toc" ] || { echo "ERROR: Generated file does not include table of contents file, please review $(BASENAME).log" ; false ; }
	$(AT)grep '{chapter}' $(BASENAME).toc >temp.toc && mv -f temp.toc $(BASENAME).toc
#	# Run pdflatex a second time to get correct page numbers in the toc
	-pdflatex -interaction batchmode $<
#	# Remove everything except for chapter entries from the toc file
	$(AT)grep '{chapter}' $(BASENAME).toc >temp.toc && mv -f temp.toc $(BASENAME).toc 
#	# Tweak the PDF bookmarks file
	$(AT)[ -e "$(BASENAME).out" ] || { echo "ERROR: Required file $(BASENAME).out does not exist, please review $(BASENAME).log" ; false ; }
	$(AT)sed 's/\\ellipsis@one =,//' $(BASENAME).out >temp.out && \
		echo '\let\WriteBookmarks\relax' >>temp.out && \
		mv -f temp.out $(BASENAME).out
#	# Run pdflatex a third time to get correct PDF bookmarks
	-pdflatex -interaction batchmode $<

clean: clean-images
	-rm -f $(BASENAME).pdf $(BASENAME).ps 
	-rm -f *.aux *.toc *.log *.lof *.dvi *.ps *.bbl *.blg *.lot *.out

distclean: clean
	-rm -f $(BASENAME).tex $(BASENAME)-untweaked.tex $(BASENAME).tex.orig $(BASENAME).tex.lat1 $(BASENAME).tex.rej
# Clean symlinks
	-rm -f ac1.tex  ac2.tex ac3.tex crtneg.tex  crtpos.tex  random.tex souvenir.sty souverbt.sty    
	$(AT)for gif in *.gif ; do [ -e $$gif ] && [ -L $$gif ] && rm -f $$gif ; done  || true
# Remove tweak file if empty
	$(AT)test -s tweak.diff || rm -f tweak.diff

# Clean all images
clean-images:
	-rm -f *.png *.jpeg *.jpg *.pdf
	-rm -f convert-images link-images

# Update tweak.diff with the current difference between untweaked and tweaked tex file
update-tweakfile:
	$(AT)if [ -e $(BASENAME)-untweaked.tex -a -e $(BASENAME).tex ] ; then \
		if ! diff -q $(BASENAME)-untweaked.tex $(BASENAME).tex; then \
			diff -u $(BASENAME)-untweaked.tex $(BASENAME).tex >tweak.diff || echo Updated tweak.diff; \
		else  \
			echo "Tweak file not updated, no changes";  \
		fi; \
	else \
		echo "Tweak file not updated, missing files";  \
	fi