mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
WORKING_DIR := $(patsubst %/,%,$(dir $(mkfile_path)))
BOOKNAME=singalongs
SRC_DIR=src
BUILD_DIR=build
TMP_DIR=tmp
SONG_DIR=${SRC_DIR}/songs
BUILD_BOOK_DIR=${BUILD_DIR}/books
TMP_BOOK_DIR=${TMP_DIR}/books
BUILD_SONG_DIR=${BUILD_DIR}/songs
TMP_SONG_DIR=${TMP_DIR}/songs
BUILD_MIDI_DIR=${BUILD_DIR}/midi
TMP_MIDI_DIR=${TMP_DIR}/midi
BUILD_OPUS_DIR=${BUILD_DIR}/opus

LY_FILES=$(wildcard ${SONG_DIR}/*.ly)
LY_PDFS=$(patsubst %.ly,${BUILD_SONG_DIR}/%.pdf,$(notdir ${LY_FILES}))
LY_TMP_PDFS=$(patsubst %.ly,${TMP_SONG_DIR}/%.pdf,$(notdir ${LY_FILES}))
LY_MIDIS=$(patsubst %.ly,${BUILD_MIDI_DIR}/%.midi,$(notdir ${LY_FILES}))
LY_TMP_MIDIS=$(patsubst %.ly,${TMP_MIDI_DIR}/%.midi,$(notdir ${LY_FILES}))
LY_OPUS=$(patsubst %.ly,${BUILD_OPUS_DIR}/%.opus,$(notdir ${LY_FILES}))

.PHONY: book songs midi opus clean directories all
.DEFAULT_GOAL := all

directories: ${BUILD_DIR} ${BUILD_BOOK_DIR} ${TMP_BOOK_DIR} ${BUILD_SONG_DIR} ${BUILD_MIDI_DIR} ${TMP_DIR} ${TMP_SONG_DIR} ${TMP_MIDI_DIR} ${BUILD_OPUS_DIR}

${BUILD_DIR}:
	mkdir -p ${BUILD_DIR}

${BUILD_BOOK_DIR}:
	mkdir -p ${BUILD_BOOK_DIR}

${BUILD_SONG_DIR}:
	mkdir -p ${BUILD_SONG_DIR}

${BUILD_MIDI_DIR}:
	mkdir -p ${BUILD_MIDI_DIR}

${TMP_DIR}:
	mkdir -p ${TMP_DIR}

${TMP_BOOK_DIR}:
	mkdir -p ${TMP_BOOK_DIR}

${TMP_SONG_DIR}:
	mkdir -p ${TMP_SONG_DIR}

${TMP_MIDI_DIR}:
	mkdir -p ${TMP_MIDI_DIR}

${BUILD_OPUS_DIR}:
	mkdir -p ${BUILD_OPUS_DIR}

${TMP_SONG_DIR}/%.pdf: ${SONG_DIR}/%.ly ${SONG_DIR}/%.tex
	cd ${SRC_DIR} && lualatex --jobname='$(notdir $(basename $@))' --output-directory=${WORKING_DIR}/${TMP_SONG_DIR} --shell-escape ${WORKING_DIR}/${SRC_DIR}/song.tex ${WORKING_DIR}/${SONG_DIR}/$(notdir $(basename $@)).ly ${WORKING_DIR}/${SONG_DIR}/$(notdir $(basename $@)).tex
	rm -r ${SRC_DIR}/tmp-ly

${BUILD_MIDI_DIR}/%.midi: ${TMP_MIDI_DIR}/%-1.midi
	cp $< $@

${TMP_MIDI_DIR}/%-1.midi: ${SONG_DIR}/%.ly
	lilypond --output=${TMP_MIDI_DIR} ${WORKING_DIR}/$<

${BUILD_OPUS_DIR}/%.opus: ${BUILD_MIDI_DIR}/%.midi
	timidity $< -Ow -o - | opusenc - $@

${TMP_BOOK_DIR}/%.pdf: ${SRC_DIR}/%.tex ${SRC_DIR}/images/title.png
	latexmk -cd -lualatex -e '$$lualatex=q/lualatex %O -shell-escape %S/' -output-directory=${WORKING_DIR}/${TMP_BOOK_DIR} $<
	rm -r ${SRC_DIR}/tmp-ly

${TMP_BOOK_DIR}/%-folio.pdf: ${TMP_BOOK_DIR}/%.pdf
	cd ${TMP_BOOK_DIR} && \
	../../bin/makebook -v -t folio -i $(notdir $<) -o $(notdir $@)

#long edge binding
${TMP_BOOK_DIR}/%-quarto.pdf: ${TMP_BOOK_DIR}/%.pdf
	cd ${TMP_BOOK_DIR} && \
	../../bin/makebook -v -t quarto -i $(notdir $<) -o $(notdir $@)

${TMP_BOOK_DIR}/%-sexto.pdf: ${TMP_BOOK_DIR}/%.pdf
	cd ${TMP_BOOK_DIR} && \
	../../bin/makebook -v -t sexto -i $(notdir $<) -o $(notdir $@)

#short edge binding
${TMP_BOOK_DIR}/%-octavo.pdf: ${TMP_BOOK_DIR}/%.pdf
	cd ${TMP_BOOK_DIR} && \
	../../bin/makebook -v -t octavo -i $(notdir $<) -o $(notdir $@)

${BUILD_DIR}/%.pdf: ${TMP_DIR}/%.pdf
	cp $< $@

book: directories ${BUILD_BOOK_DIR}/${BOOKNAME}.pdf ${BUILD_BOOK_DIR}/${BOOKNAME}-folio.pdf ${BUILD_BOOK_DIR}/${BOOKNAME}-quarto.pdf ${BUILD_BOOK_DIR}/${BOOKNAME}-sexto.pdf ${BUILD_BOOK_DIR}/${BOOKNAME}-octavo.pdf ${LY_FILES}
songs: directories ${LY_PDFS}
midi: directories ${LY_MIDIS}
opus: directories ${LY_OPUS}
all: book songs midi opus

clean:
	rm -rf ${BUILD_DIR}
	rm -rf ${TMP_DIR}