#!/bin/mksh
# -*- mode: sh -*-
#-
# Copyright © 2007, 2008, 2011, 2012, 2013, 2014, 2018, 2019, 2020
#	mirabilos <m@mirbsd.org>
#
# Provided that these terms and disclaimer and all copyright notices
# are retained or reproduced in an accompanying document, permission
# is granted to deal in this work without restriction, including un‐
# limited rights to use, publicly perform, distribute, sell, modify,
# merge, give away, or sublicence.
#
# This work is provided “AS IS” and WITHOUT WARRANTY of any kind, to
# the utmost extent permitted by applicable law, neither express nor
# implied; without malicious intent or gross negligence. In no event
# may a licensor, author or contributor be held liable for indirect,
# direct, other damage, loss, or other issues arising in any way out
# of dealing in the work, even if advised of the possibility of such
# damage or existence of a defect, except proven that it results out
# of said person’s immediate fault when using the work as intended.
#-
# cf. $(dirname "$0")/push-music

unset LANGUAGE
export LC_ALL=C.UTF-8
export TZ=UTC
unset UNZIP
me=$(realpath "$0")

if [[ -z $DISPLAY ]]; then
	print -ru2 -- "E: re-run with DISPLAY set, need X11"
	exit 1
fi

usage() {
	print -r -- "E: Usage: $0 [±23 cmd] [-c file] [-fnrU] [-- mscore-args]"
	print -r -- "N: -c convert only given file (multiples ok)"
	print -r -- "N: -f do only fonts, -n do not upload, ±r run mscore (+r v2)"
	print -r -- "N: -U add UI font to, and do not use tmp cfg/~ for ±r"
	exit ${1:-1}
}

function saveFilename {
	REPLY=${1##*([	-
 …   - 

  　])}
	REPLY=${REPLY%%*([	-
 …   - 

  　])}
	REPLY=${REPLY//+([	-
 …   - 

  　])/_}
	REPLY=${REPLY//ä/ae}
	REPLY=${REPLY//ö/oe}
	REPLY=${REPLY//ü/ue}
	REPLY=${REPLY//ß/ss}
	REPLY=${REPLY//Ä/Ae}
	REPLY=${REPLY//Ö/Oe}
	REPLY=${REPLY//Ü/Ue}
	REPLY=${REPLY//♭/b}
	REPLY=${REPLY//♯/#}
	REPLY=${REPLY//[\\/:*?\"<>|]/_}
}

function dumparr {
	nameref arr=$1
	local el

	for el in "${arr[@]}"; do
		REPLY+=" ${el@Q}"
	done
	REPLY="${1@Q}=(${REPLY:1})"
}

function try_mscore {
	local have=0 cmd vchk=$1 exe chroot dv=$2
	nameref arr=$dv
	shift 2

	while [[ $1 != . ]]; do
		exe=$1; chroot=$2
		shift 2
		set -A cmd -- schroot -prc "$chroot" -- "$exe"
		[[ -n $chroot ]] || set -A cmd -- "$exe"
		[[ $("${cmd[@]}" --version 2>/dev/null) = \
		    MuseScore*" $vchk"* ]] || continue
		if [[ $(
			if [[ -n $chroot ]]; then
				schroot -prc "$chroot" -- mksh -c \
				    'file $(realpath $(which '"${exe@Q}))"
			else
				file $(realpath $(which "$exe"))
			fi
		    ) = *32-bit*x86-64* ]]; then
			# x32 binary, prefer others (often slightly buggy)
			(( have )) || set -A arr -- "${cmd[@]}"
			have=1
		else
			set -A arr -- "${cmd[@]}"
			break
		fi
	done
	set +x
	try_sf "$dv" "${arr[@]}"
}
function try_sf {
	local cmd
	nameref sfa=sf${1#mscore}; shift

	if [[ $1 = schroot ]]; then
		set -A cmd -- schroot -prc "$3" -- mksh -c
	else
		set -A cmd -- mksh -c
	fi
	set -A sfa -- "$("${cmd[@]}" \
	    'realpath /usr/share/sounds/sf3/MuseScore_General.sf3')"
	sfa[1]=$("${cmd[@]}" "python3 - -i ${sfa@Q}" <"${me%/*}"/riffedit.py)
	sfa=${sfa##/usr/share/sounds/?(sf?/)}
}
try_mscore 2.3.2 mscore2 \
    musescore buster \
    musescore '' \
    musescore vncsess \
    musescore stretch \
    .
try_mscore 3. mscore3 \
    musescore3 buster \
    musescore3 '' \
    musescore3 vncsess \
    musescore3 stretch \
    musescore-snapshot '' \
    musescore-snapshot vncsess \
    .

onlyfont=0
onlyconvert=0
domscore=0
doupload=1
doUI=0
set -A toconvert
while getopts "2:3:c:fhnrU" ch; do
	case $ch {
	(2|3)
		nameref cmd=mscore$ch
		set -A cmd -- "$OPTARG"
		try_sf $ch "${cmd[@]}"
		;;
	(+2|+3)
		set -o noglob
		nameref cmd=mscore${ch#'+'}
		set -A cmd -- $OPTARG
		set +o noglob
		try_sf $ch "${cmd[@]}"
		;;
	(c)
		onlyconvert=1
		toconvert+=("$(realpath "$OPTARG")")
		;;
	(f)
		onlyfont=1
		;;
	(+f)
		onlyfont=0
		;;
	(h)
		usage 0
		;;
	(n)
		doupload=0
		;;
	(+n)
		doupload=1
		;;
	(r)
		domscore=3
		;;
	(+r)
		domscore=2
		;;
	(U)
		doUI=1
		;;
	(+U)
		doUI=0
		;;
	(*)
		usage
		;;
	}
done
shift $((OPTIND - 1))
theremote=${1:-origin}

function sfid {
	nameref sfa=sf$1
	print -r -- "${sfa[1]}" | \
	    tr '\377' '\0' | \
	    grep -z -a -e ^INAM -e ^ICOP | \
	    tr '\376\0' ':\n'
}
print -ru2 -- "D: ${|dumparr mscore2;} $(sfid 2)"
print -ru2 -- "D: ${|dumparr mscore3;} $(sfid 3)"
sleep 1

set -x
set -e
set -o inherit-xtrace
set -o pipefail

owd=$PWD
cd "$(realpath "$0/../../..")"
wd=$(realpath .)
mkdir -p .git/t-export/.tmp
T=$(realpath .git/t-export/.tmp)
rm -rf "$T/home"
mkdir "$T/home" "$T/home/cfg"
ohome=$(realpath ~)
(( doUI )) || HOME=$T/home
: "${XAUTHORITY:=$ohome/.Xauthority}"
export XAUTHORITY

# RFC 2396 and some optional characters _plus_ apostrophe
# -> escapes all shell meta-characters as well
# minus /
function p_uri_escape {
	print -nr -- "$@" | sed -e '
	    s.%.%25.g
	    s.;.%3B.g
	    s.?.%3F.g
	    s.:.%3A.g
	    s.@.%40.g
	    s.&.%26.g
	    s.=.%3D.g
	    s.+.%2B.g
	    s.\$.%24.g
	    s.,.%2C.g
	    s.	.%09.g
	    s. .%20.g
	    s.<.%3C.g
	    s.>.%3E.g
	    s.#.%23.g
	    s.".%22.g
	    s.{.%7B.g
	    s.}.%7D.g
	    s.|.%7C.g
	    s.\\.%5C.g
	    s.\^.%5E.g
	    s.\[.%5B.g
	    s.\].%5D.g
	    s.`.%60.g
	    s.'\''.%27.g
	'
}

# escape XHTML characters (three mandatory XML ones plus double quotes,
# the latter in an XML safe fashion numerically though)
function xhtml_escape {
	if (( $# )); then
		print -nr -- "$@"
	else
		cat
	fi | sed \
	    -e 's
&
\&amp;
g' \
	    -e 's
<
\&lt;
g' \
	    -e 's
>
\&gt;
g' \
	    -e 's
"
\&#34;
g'
}

# same as valsub avoiding fork
function xhtml_fesc {
	REPLY=${1//'&'/'&amp;'}
	REPLY=${REPLY//'<'/'&lt;'}
	REPLY=${REPLY//'>'/'&gt;'}
	REPLY=${REPLY//'"'/'&#34;'}
}

if (( !onlyconvert )); then
	rm -rf .git/t-fonts
	mkdir -p .git/t-fonts/{conf,fnts,cache,x}
	sed \
	    -e "s
@fontdir@
$(realpath .git/t-fonts/fnts | xhtml_escape)
" \
	    -e "s
@cachedir@
$(realpath .git/t-fonts/cache | xhtml_escape)
" \
	    <music/resources/push-fontconf.in >.git/t-fonts/conf/fonts.conf
	for archive in music/resources/Gentium*.zip \
	    music/resources/UnifrakturMaguntia*.zip \
	    ; do
		archive=$(realpath "$archive")
		(
			cd .git/t-fonts/x
			case $archive {
			(*.zip) unzip -- "$archive" ;;
			(*.tgz) tar -xzf "$archive" ;;
			(*) print -ru2 -- "E: unknown type: $archive"; exit 1 ;;
			}
		)
	done
	fntdir=$(realpath .git/t-fonts/fnts)
	(cd /usr/share/fonts/truetype/freefont; pax -rw -l \
	    Free{Sans,Serif{,Bold}{,Italic}}.ttf "$fntdir/")
	(cd .git/t-fonts/x/Gentium*/; pax -rw -l Gentium-*ttf "$fntdir/")
	(cd .git/t-fonts/x/UnifrakturMaguntia*/; pax -rw -l UnifrakturMaguntia.ttf "$fntdir/")
	(cd music/resources/; pax -rw -l *.?tf "$fntdir/")
	# not suitable for embedding
	rm -f .git/t-fonts/fnts/Inconsolatazi4varl_qu-Bold.otf
fi
fntdir=$(realpath .git/t-fonts/fnts)
export FC_CONFIG_FILE=$(realpath .git/t-fonts/conf/fonts.conf)
export FC_CONFIG_DIR=$(realpath .git/t-fonts/conf)
export FONTCONFIG_FILE=$FC_CONFIG_FILE FONTCONFIG_PATH=$FC_CONFIG_DIR
fc-list | sort
(( !onlyfont )) || exit 0
set -A cfgdir -- -c "$T/home/cfg" -a alsa #-b 160
(( doUI )) && set -A cfgdir #empty

if (( domscore )); then
	firadir=/usr/share/texlive/texmf-dist/fonts/opentype/public/fira
	(( doUI )) && if [[ -s $firadir/FiraSans-Medium.otf ]]; then
		print -ru2 -- "N: adding Fira Sans as UI font"
		(cd "$firadir"; pax -rw -l FiraSans-*.otf "$fntdir/")
	else
		print -ru2 -- "W: Fira Sans missing, read usage"
	fi
	cd "$owd"
	nameref cmd=mscore$domscore
	exec "${cmd[@]}" "${cfgdir[@]}" "$@"
fi

# remove target dir unless we’re converting individual files only
(( onlyconvert )) || rm -rf .git/t-music

d_mscz='MuseScore'
d_mid='Standard MIDI'
d_xml='MusicXML'
d_pdf='PDF'
d_mp3='MPEG 1 or 2, layer Ⅲ audio'

set -A renamef
set -A renamet
nrename=0

function cvtf2meta {
	set +x
	local V=$1 name=$2 f=$3 x
	local bn=${name%.*} parts part partf
	shift 3

	print -r -- "<MirseScoreMetaPreBeta>"
	for x in "$@"; do
		nameref d=d_$x
		print -r -- "	<export href=\"$(p_uri_escape \
		    "/$bn.$x")\">$d</export>"
	done
	parts=$(xmlstarlet <"$f" sel -T -t \
	    -m //museScore/Score/Score/name -v . -o '
' -b)
	while [[ -n $parts ]]; do
		part=${parts%%
*}
		parts=${parts#*
}
		partf=${|saveFilename "$part";}
		partx=${|xhtml_fesc "$part";}
		if [[ $partf != "$part" ]]; then
			renamef[nrename]="$bn [$partf].pdf"
			renamet[nrename]="$bn [$part].pdf"
			let ++nrename
		fi
		print -r -- "	<export href=\"$(p_uri_escape \
		    "/$bn [$part].pdf")\" part=\"$partx\"" \
		    "partfn=\"${|xhtml_fesc "$partf";}\">part" \
		    "PDF for: $partx</export>"
	done
	print -r -- "	<score href=\"$(p_uri_escape "/$name")\">"
	urlsplit "$(xmlstarlet <"$f" sel -t -m /museScore \
	    -o $'\t\t' -e madeWith -v programVersion -b -n \
	    -m 'Score/metaTag[text()]' -o $'\t\t' -c . -n -b -b)"
	print -r -- "$REPLY"
	print -r -- "	</score>"
	cat "$T/t$V.xml"
	print -r -- "</MirseScoreMetaPreBeta>"
}

set -A to_mischk
function cvtf {
	local name=$1 exts
	set -A exts

	# analyse file
	local f=$name V
	if [[ $f = *.mscz ]]; then
		f=$(unzip -p -- "$name" META-INF/container.xml | \
		    xmlstarlet sel -T -t -m //rootfile -v @full-path -n)
		unzip -p -- "$name" "$f" >"$T/tmp-analyse"
		f=$T/tmp-analyse
	fi
	V=$(xmlstarlet sel -T -t -m /museScore -v @version -n <"$f")
	if [[ $V = 2.* ]]; then
		V=2
	elif [[ $V = 3.* ]]; then
		V=3
	else
		print -ru2 -- "E: unknown score version in $name"
		print -ru2 -- "N: version: ${V@Q}"
		print -ru2 -- "N: line:" $(fgrep '<museScore' "$f")
		exit 1
	fi

	mkdir -p ".git/t-music/${name%/*}"
	local sp=$(realpath "$name")
	local db=$(realpath ".git/t-music/$name")
	local tb="${sp%.msc[xz]}"
	db="${db%.msc[xz]}"

	local dJ="[ [ ${|json_escape "$db [";}, \"].pdf\" ]"
	for ext in mscz mid xml pdf mp3; do
		[[ -e $tb.$ext ]] && continue
		exts+=($ext)
		dJ+=", ${|json_escape "$db.$ext";}"
	done
	addtransA "$V" "$sp" "$dJ ]"
	cvtf2meta "$V" "$name" "$f" "${exts[@]}" >"$db.meta.xml"
	to_mischk+=("${name%.msc[xz]}")
}

# fixup missing-glyph detection
function hack_mudraw {
	case $basename {
	(*/'Praetorius -- Lobt Gott ihr Christen allzugleich (Original)')
		# ligatures in UnifrakturMaguntia show up as unknown
		sed \
		    -e 's/Se�ster/Sechster/g' \
		    -e 's/Deuts�er Geistli�er in der Christli�en Kir�en übli�er/Deutscher Geistlicher in der Christlichen Kirchen üblicher/g'
		;;
	(*)
		# characters outside of the BMP
		sed -E \
		    -e 's/ � (CC-BY-SA|CC-BY-NC-SA|CPDL)\>/ 🄯 \1/g'
		;;
	}
}

function mischk {
	local basename name

	rm -f "$T/tmp-analyse"
	runalltrans

	for basename in "${to_mischk[@]}"; do
		for name in .git/t-music/"$basename".pdf \
		    .git/t-music/"$basename ["*.pdf; do
			[[ -s $name ]] || continue
			mutool draw -o - -F txt "$name" | \
			    hack_mudraw "$basename" >"$T/tmp-draw" 2>&1
			fgrep -q '�' "$T/tmp-draw" || continue
			print -ru2 -- "W: missing glyphs in $name"
			misglyph+=("$name")
		done
	done
	rm -f "$T/tmp-draw"

	(( ${#misglyph[*]} )) || return 0
	set +x
	print -ru2 -- "E: missing glyphs found; check them with:"
	for name in "${misglyph[@]}"; do
		print -ru2 -- "N: mutool draw -o - -F txt ${name@Q} | less \$'+/\xEF\xBF\xBD'"
	done
	exit 1
}

mkdir -p .git/t-music
[[ -d .git/t-music/. ]]
set -A misglyph

rm -f "$T"/t*.{jsn,xml}

set +x
function urlsplit {
	local t x z
	set -o noglob

	IFS=$'\xFF'
	[[ $1 = *"$IFS"* ]] && exit 205

	# hrefify embedded URLs, well some anyway
	set -A z -- ${1@/http?(s)'://'/$IFS$KSH_MATCH}
	REPLY=$z
	unset z[0]
	for x in "${z[@]}"; do
		t=${x%%?([;?:,.!\'\(\)])[!#0-9a-zA-Z;/?:@&=+$,_.!~*\'\(\)%-]*}
		x=${x#"$t"}
		REPLY+="<a href=\"$t\">$t</a>$x"
	done

	IFS=$' \t\n'
}

function do_soundfont {
	local x y z
	set -o noglob

	print -r -- "	<soundfont file=\"${|xhtml_fesc "$1";}\">"
	IFS=$'\xFF'
	set -A y -- $2
	for x in "${y[@]}"; do
		IFS=$'\xFE'
		set -A z -- $x
		set -A rs
		x=$'\t\t<info name="'${|xhtml_fesc "${z[0]}";}'">'
		# escape for XML and strip trailing newlines-ish
		z=${|xhtml_fesc "${z[1]%%+($'\r'|$'\n')}";}
		print -r -- "$x${|urlsplit "$z";}</info>"
	done
	print -r -- '	</soundfont>'
}
do_soundfont "${sf2[@]}" >"$T"/t2.xml
do_soundfont "${sf2[@]}" >"$T"/t3.xml
set -x

# escape string into JSON string (with surrounding quotes)
function json_escape {
	set +x # requires mksh R51
	set -U
	local o=\" s
	if (( $# )); then
		read -raN-1 s <<<"$*"
		unset s[${#s[*]}-1]
	else
		read -raN-1 s
	fi
	local -i i=0 n=${#s[*]} wc
	local -Uui16 -Z7 x
	local -i1 ch

	while (( i < n )); do
		(( ch = x = wc = s[i++] ))
		case $wc {
		(8) o+=\\b ;;
		(9) o+=\\t ;;
		(10) o+=\\n ;;
		(12) o+=\\f ;;
		(13) o+=\\r ;;
		(34) o+=\\\" ;;
		(92) o+=\\\\ ;;
		(*)
			if (( wc < 0x20 || wc > 0xFFFD || \
			    (wc >= 0xD800 && wc <= 0xDFFF) || \
			    (wc > 0x7E && wc < 0xA0) )); then
				o+=\\u${x#16#}
			else
				o+=${ch#1#}
			fi
			;;
		}
	done
	REPLY="$o\""
}

function addtransA {
	local v=$1 from=$2 toJSN=$3
	nameref tlast=tlast$v
	local f=$T/t$v.jsn

	print -r -- "${tlast:-[}{\"in\":${|json_escape "$from";},\"out\":$toJSN}" \
	    >>"$f"
	tlast=,
}

function runalltrans {
	local f

	for f in $T/t*.jsn; do
		[[ -s $f ]] || continue
		runtrans "${f##*/t}"
	done

	cd "$wd/.git/t-music/music/chor"
	rm -f 'Karg-Elert -- Passionskanzone.pdf'
	if test -s 'Karg-Elert -- Passionskanzone #1.pdf' && \
	   test -s 'Karg-Elert -- Passionskanzone #3a.pdf' && \
	   test -s 'Karg-Elert -- Passionskanzone #3b.pdf'; then
		mksh "${me%/*}"/ps2pdfmir \
		    -o 'Karg-Elert -- Passionskanzone.pdf' \
		    'Karg-Elert -- Passionskanzone #1.pdf' \
		    'Karg-Elert -- Passionskanzone #3a.pdf' \
		    'Karg-Elert -- Passionskanzone #3b.pdf'
	fi
	rm -f 'Karg-Elert -- Passionskanzone #'*.pdf
	rm -f ../free/'Michel -- Macht hoch die Tür + Hosianna [Gemeinde].pdf'
	if test -s 'Michel -- Macht hoch die Tür + Hosianna [Gemeinde].pdf'; then
		ln -f 'Michel -- Macht hoch die Tür + Hosianna [Gemeinde].pdf' ../free/
	fi
	cd "$wd/.git/t-music"
	while (( nrename-- )); do
		mv "${renamef[nrename]}" "${renamet[nrename]}"
	done
	cd "$wd"
}

function runtrans {
	local V=${1%.jsn}
	local v=${V::1}
	nameref cmd=mscore$v
	local f=$T/t$V.jsn
	local p=

	[[ $V = *p* ]] && p=-P

	print ']' >>"$f"
	"${cmd[@]}" "${cfgdir[@]}" $p -j "$f"
	rm -f "$f"
}

if (( onlyconvert )); then
	rv=0
	for name in "${toconvert[@]}"; do
		if [[ -s "$name" ]]; then
			cvtf "${name#"$wd/"}"
		else
			print -ru2 -- "E: file \"$name\" does not exist"
			rv=1
		fi
	done
	mischk
	exit $rv
fi

git find -name \*.mscx -o -name \*.mscz -print0 |&
while IFS= read -r -p -d '' name; do
	[[ $name != */.skip/* ]] || continue
	[[ $name != */'Pachelbel Canon in D: Impossible'.* ]] || continue
	cvtf "$name"
done
mischk

rv=0
cd "$wd/.git/t-music/music"
for x in \
	'chor/Karg-Elert -- Passionskanzone.pdf' \
	'free/Michel -- Macht hoch die Tür + Hosianna [Gemeinde].pdf' \
    ; do
	test -s "$x" && continue
	print -ru2 -- "E: missing: $x"
	rv=1
done
cd "$wd"

(( doupload && !rv )) || exit $rv
print -u2 '\a'

remote=$(git remote get-url --push "$theremote")
rhost=${remote%%:*}
rpath=${remote#*:}
rm -rf "$T/path"
ssh -n "$rhost" "${rpath@Q}/mir/push-music" noclean >"$T/path"
cat "$T/path"
rwdir=$(sed --posix -n '/^THE_WORKTREE=/s/^THE_WORKTREE=\(.*\)
$/\1/p' \
    <"$T/path")
test -n "$rwdir"
[[ $rwdir = /* ]]
rm -f "$T/path"

ssh -n "$rhost" "${rpath@Q}/mir/push-music"
rsync -zavPH --numeric-ids -S --stats '--rsh=ssh -T' \
    .git/t-music/ "$rhost:$rwdir/"
exit 0