BIBLIOGRAPHY := bibliography.bib
TEMPLATE_FILES := $(wildcard templates/*)
TEMPLATE := templates/default.latex
WORDCOUNT_FILTER := filters/wordcount.lua
DISSERTATION_FRONTMATTER := frontmatter.yml
DISSERTATION_MARKDOWN := dissertation.md
CHAPTER_MARKDOWN_FILES := $(wildcard chapter*.md)
CHAPTER_MARKDOWN_FILE_PATTERN := chapter%.md
CHAPTER_INDICES := $(CHAPTER_MARKDOWN_FILES:chapter%.md=%)
CHAPTER_WORDCOUNT_FILE_PATTERN := .chapter%.wc
CHAPTER_WORDCOUNT_FILES := $(CHAPTER_INDICES:%=$(CHAPTER_WORDCOUNT_FILE_PATTERN))
LOG_MARKDOWN := log.md
SCRAPBOOK_MARKDOWN := scrapbook.md
DISSERTATION_LATEX := dissertation.latex
DISSERTATION_LATEX_NO_REFERENCES := dissertation-no-references.latex
DISSERTATION_WORDCOUNT_FILE := .dissertation.wc
DISSERTATION_NO_REFERENCES_WORDCOUNT_FILE := .dissertation-no-references.wc
DISSERTATION_PDF := dissertation.pdf
DISSERTATION_PDF_NO_REFERENCES := dissertation-no-references.pdf
COVER_SHEET_TEMPLATE_ODT := cover-sheet.odt
COVER_SHEET_COMPLETE_ODT := cover-sheet-complete.odt
COVER_SHEET_COMPLETE_PDF := cover-sheet-complete.pdf
DISSERTATION_SUBMISSION := dissertation-submission.pdf
LOG_PDF := log.pdf
SCRAPBOOK_PDF := scrapbook.pdf

chapter_markdown_file = chapter$(chapter_index).md
chapter_wordcount_file = .chapter$(chapter_index).wc
chapter_wordcount = $(shell cat $(chapter_wordcount_file))
chapter_wordcounts = $(foreach chapter_index,$(CHAPTER_INDICES),$(chapter_wordcount))
chapter_wordcounts_sum = $$(( $(addsuffix " +",$(chapter_wordcounts)) 0 ))
dissertation_wordcount = $(shell cat $(DISSERTATION_WORDCOUNT_FILE))
dissertation_no_references_wordcount = $(shell cat $(DISSERTATION_NO_REFERENCES_WORDCOUNT_FILE))
prettify_wordcount = $(shell printf "%'i" $(1))
footnotes_wordcount = $$(( $(dissertation_no_references_wordcount) - $(chapter_wordcounts_sum) ))
references_wordcount = $$(( $(dissertation_wordcount) - $(dissertation_no_references_wordcount) ))
chapter_title = $(shell head -n 1 $(chapter_markdown_file) | cut -c4-)

all: log scrapbook dissertation wordcount submission

watch:
ifdef TARGET
	while true; do \
		$(MAKE) $(TARGET); \
		inotifywait -qre close_write .; \
	done
else
	while true; do \
		$(MAKE) all; \
		inotifywait -qre close_write .; \
	done
endif

log: $(LOG_PDF)

$(LOG_PDF): $(LOG_MARKDOWN) $(BIBLIOGRAPHY) $(TEMPLATE_FILES)
	pandoc \
		--standalone \
		--from markdown \
		--to pdf \
		--pdf-engine pdflatex \
		--citeproc \
		--template $(TEMPLATE) \
		--output $(LOG_PDF) \
		$(LOG_MARKDOWN)

scrapbook: $(SCRAPBOOK_PDF)

$(SCRAPBOOK_PDF): $(SCRAPBOOK_MARKDOWN) $(BIBLIOGRAPHY) $(TEMPLATE_FILES)
	pandoc \
		--standalone \
		--from markdown \
		--to pdf \
		--pdf-engine pdflatex \
		--citeproc \
		--template $(TEMPLATE) \
		--output $(SCRAPBOOK_PDF) \
		$(SCRAPBOOK_MARKDOWN)

dissertation: $(DISSERTATION_PDF)

$(DISSERTATION_PDF): $(DISSERTATION_MARKDOWN) $(BIBLIOGRAPHY) $(TEMPLATE_FILES)
	pandoc \
    	--standalone \
    	--from markdown \
    	--to pdf \
    	--pdf-engine pdflatex \
    	--citeproc \
        --template $(TEMPLATE) \
    	--output $(DISSERTATION_PDF) \
    	$(DISSERTATION_MARKDOWN)

$(DISSERTATION_LATEX): $(DISSERTATION_MARKDOWN) $(BIBLIOGRAPHY) $(TEMPLATE_FILES)
	pandoc \
    	--standalone \
    	--from markdown \
    	--to latex \
    	--citeproc \
        --template $(TEMPLATE) \
    	--output $(DISSERTATION_LATEX) \
    	$(DISSERTATION_MARKDOWN)

.SILENT: $(DISSERTATION_MARKDOWN)
$(DISSERTATION_MARKDOWN): $(DISSERTATION_FRONTMATTER) $(CHAPTER_MARKDOWN_FILES)
	echo "---" > $(DISSERTATION_MARKDOWN)
	cat $(DISSERTATION_FRONTMATTER) >> $(DISSERTATION_MARKDOWN)
	echo "---" >> $(DISSERTATION_MARKDOWN); \
	$(foreach chapter,$(CHAPTER_MARKDOWN_FILES), \
    	echo "" >> $(DISSERTATION_MARKDOWN); \
    	cat $(chapter) >> $(DISSERTATION_MARKDOWN); \
     )
	echo "" >> $(DISSERTATION_MARKDOWN)
	echo "## References" >> $(DISSERTATION_MARKDOWN)
	echo "" >> $(DISSERTATION_MARKDOWN)
	echo "Bible references are from the Authorised Version." >> $(DISSERTATION_MARKDOWN)
	echo "" >> $(DISSERTATION_MARKDOWN)

.SILENT: wordcount
.PHONY: wordcount
wordcount: $(CHAPTER_WORDCOUNT_FILES) $(DISSERTATION_WORDCOUNT_FILE) $(DISSERTATION_NO_REFERENCES_WORDCOUNT_FILE)
	$(foreach chapter_index,$(CHAPTER_INDICES), \
    	echo "$(chapter_title): $(call prettify_wordcount,$(chapter_wordcount))"; \
	)
	echo "Footnotes: $(call prettify_wordcount,$(footnotes_wordcount))"
	echo "--------------------------------"
	echo "Total: $(call prettify_wordcount,$(dissertation_no_references_wordcount))"
	echo "--------------------------------"
	echo "(References: $(call prettify_wordcount,$(references_wordcount)))"

$(CHAPTER_WORDCOUNT_FILE_PATTERN): $(CHAPTER_MARKDOWN_FILE_PATTERN) $(WORDCOUNT_FILTER)
	pandoc --lua-filter $(WORDCOUNT_FILTER) $< > $@

$(DISSERTATION_WORDCOUNT_FILE): $(DISSERTATION_PDF)
	pdfgrep -o '\w+' $(DISSERTATION_PDF) | wc -w \
		> $(DISSERTATION_WORDCOUNT_FILE)

$(DISSERTATION_NO_REFERENCES_WORDCOUNT_FILE): $(DISSERTATION_PDF_NO_REFERENCES)
	pdfgrep -o '\w+' $(DISSERTATION_PDF_NO_REFERENCES) | wc -w \
		> $(DISSERTATION_NO_REFERENCES_WORDCOUNT_FILE)

$(DISSERTATION_PDF_NO_REFERENCES): $(DISSERTATION_LATEX_NO_REFERENCES)
	pandoc \
    	--standalone \
    	--from latex \
    	--to pdf \
    	--pdf-engine pdflatex \
    	--output $(DISSERTATION_PDF_NO_REFERENCES) \
    	$(DISSERTATION_LATEX_NO_REFERENCES)

bib_start_line_index = $(shell grep -nm 1 "^\\\\begin{CSLReferences}" $(DISSERTATION_LATEX) | sed "s/^\([0-9]*\):.*$$/\1/")
bib_end_line_index = $(shell grep -nm 1 "^\\\\end{CSLReferences}" $(DISSERTATION_LATEX) | sed "s/^\([0-9]*\):.*$$/\1/")
$(DISSERTATION_LATEX_NO_REFERENCES): $(DISSERTATION_LATEX)
	head -n $$(( $(bib_start_line_index) - 1 )) $(DISSERTATION_LATEX) > $(DISSERTATION_LATEX_NO_REFERENCES)
	tail -n +$$(( $(bib_end_line_index) + 1 )) $(DISSERTATION_LATEX) >> $(DISSERTATION_LATEX_NO_REFERENCES)

.phony: submission
submission: $(DISSERTATION_SUBMISSION)

$(DISSERTATION_SUBMISSION): $(COVER_SHEET_COMPLETE_PDF) $(DISSERTATION_PDF)
	pdftk $(COVER_SHEET_COMPLETE_PDF) $(DISSERTATION_PDF) cat output $(DISSERTATION_SUBMISSION)

$(COVER_SHEET_COMPLETE_PDF): $(COVER_SHEET_COMPLETE_ODT)
	libreoffice --convert-to pdf $(COVER_SHEET_COMPLETE_ODT)

$(COVER_SHEET_COMPLETE_ODT): $(COVER_SHEET_TEMPLATE_ODT) $(DISSERTATION_NO_REFERENCES_WORDCOUNT_FILE)
	odfdo-replace \
	    "{{ word_count }}" \
		"$(call prettify_wordcount,$(dissertation_no_references_wordcount))" \
		-i $(COVER_SHEET_TEMPLATE_ODT) \
		-o $(COVER_SHEET_COMPLETE_ODT)

clean:
	rm -f $(LOG_PDF) $(SCRAPBOOK_PDF) $(DISSERTATION_MARKDOWN) $(DISSERTATION_LATEX) $(DISSERTATION_LATEX_NO_REFERENCES) $(DISSERTATION_PDF) $(DISSERTATION_PDF_NO_REFERENCES) $(CHAPTER_WORDCOUNT_FILES) $(DISSERTATION_WORDCOUNT_FILE) $(COVER_SHEET_COMPLETE_ODT) $(COVER_SHEET_COMPLETE_PDF)