#!/bin/bash -xe

#
#  Singe 2
#  Copyright (C) 2006-2024 Scott Duensing <scott@kangaroopunch.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public Licens
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#


G_BUILDROOT=${PWD}
G_BUILDDIR=.builddir
G_TARGET=
G_GENERATED=


function buildAll() {
	local OS=$1
	local ARCH=$2
	local TRIPLE=
	local SUFFIX=
	local TOOLCHAIN=
	local COMMON=
	local CROSS_OS=
	local OSXCROSS_LOCATION=


	case "${OS}" in

		linux)
			case "${ARCH}" in
				x86)
					TRIPLE="i686-linux-gnu"
					;;
				x86_64)
					TRIPLE="x86_64-linux-gnu"
					;;
			esac
			CROSS_OS="linux"
			;;

		macos)
			case "${ARCH}" in
				aarch64)
					TRIPLE="aarch64-apple-darwin22.4"
					OSXCROSS_LOCATION=${G_BUILDROOT}/../toolchains/x-tools/aarch64-macos-apple
					;;
				x86)
					TRIPLE="i386-apple-darwin17"
					OSXCROSS_LOCATION=${G_BUILDROOT}/../toolchains/x-tools/x86_64-macos-apple
					;;
				x86_64)
					TRIPLE="x86_64-apple-darwin17"
					OSXCROSS_LOCATION=${G_BUILDROOT}/../toolchains/x-tools/x86_64-macos-apple
					;;
			esac
			CROSS_OS="darwin"
			source <("${OSXCROSS_LOCATION}/bin/osxcross-conf" 2>/dev/null)
			export OSXCROSS_LOCATION
			;;


		windows)
			case "${ARCH}" in
				x86)
					TRIPLE="i686-w64-mingw32"
					;;
				x86_64)
					TRIPLE="x86_64-w64-mingw32"
					;;
			esac
			SUFFIX=".exe"
			CROSS_OS="mingw32"
			;;

	esac

	G_TARGET=${G_BUILDROOT}/${G_BUILDDIR}/${OS}/${ARCH}
	G_GENERATED=${G_TARGET}/generated
	TOOLCHAIN=${G_BUILDROOT}/../toolchains/cmake/${TRIPLE}.cmake
	COMMON="-DCMAKE_INSTALL_PREFIX=${G_TARGET} -DCMAKE_TOOLCHAIN_FILE=${TOOLCHAIN}"
	# Add CMAKE_BUILD_TYPE to COMMON

	mkdir -p ${G_GENERATED}

	#export LD_FLAGS="-L ${G_TARGET}/lib"
	#export C_FLAGS="-I ${G_TARGET}/include"
	#export CXX_FLAGS=${C_FLAGS}
	export LD_LIBRARY_PATH=${G_TARGET}
	export PKG_CONFIG_LIBDIR=${G_TARGET}/lib/pkgconfig

#:<<SKIP
	pushd thirdparty/SDL2
	clearAndEnterBuild
	cmake ${COMMON} \
		-DSDL_SHARED=off \
		-DSDL_STATIC=on \
		..
	make install
	popd

	pushd thirdparty/SDL2_image
	clearAndEnterBuild
	cmake ${COMMON} \
		-DBUILD_SHARED_LIBS=off \
		-DSDL2IMAGE_DEPS_SHARED=off \
		-DSDL2IMAGE_SAMPLES=off \
		-DSDL2IMAGE_TESTS=off \
		-DSDL2IMAGE_VENDORED=on \
		-DSDL2IMAGE_AVIF=off \
		-DSDL2IMAGE_JXL=off \
		-DSDL2IMAGE_TIF=off \
		-DSDL2IMAGE_WEBP=on \
		-DSDL2_DIR=${G_TARGET}/lib/cmake/SDL2 \
		..
	make install
	popd
	if [[ "${OS}" == "windows" ]]; then
		mv ${G_TARGET}/lib/libjxl_dec-static.a ${G_TARGET}/lib/libjxl_dec.a
	fi

	pushd thirdparty/SDL2_mixer
	clearAndEnterBuild
	cmake ${COMMON} \
		-DBUILD_SHARED_LIBS=off \
		-DSDL2MIXER_CMD=off \
		-DSDL2MIXER_DEPS_SHARED=off \
		-DSDL2MIXER_VENDORED=on \
		-DSDL2MIXER_SAMPLES=off \
		-DSDL2_DIR=${G_TARGET}/lib/cmake/SDL2 \
		-DWAVPACK_ENABLE_ASM=no \
		..
	make install
	popd

	pushd thirdparty/SDL2_ttf
	clearAndEnterBuild
	cmake ${COMMON} \
		-DBUILD_SHARED_LIBS=off \
		-DSDL2TTF_VENDORED=on \
		-DSDL2TTF_HARFBUZZ=on \
		-DSDL2TTF_SAMPLES=off \
		-DSDL2_DIR=${G_TARGET}/lib/cmake/SDL2 \
		..
	make install
	popd

	pushd thirdparty/bzip2
	clearAndEnterBuild
	cmake ${COMMON} \
		-DENABLE_SHARED_LIB=off \
		-DENABLE_STATIC_LIB=on \
		-DENABLE_LIB_ONLY=on \
		..
	make install
	popd

	pushd thirdparty/xz
	clearAndEnterBuild
	cmake ${COMMON} \
		-DBUILD_SHARED_LIBS=off \
		-DBUILD_TESTING=off \
		..
	make install
	popd

	pushd thirdparty/zlib
	clearAndEnterBuild
	cmake ${COMMON} ..
	make install
	popd
	if [[ "${OS}" == "windows" ]]; then
		mv ${G_TARGET}/lib/libzlibstatic.a ${G_TARGET}/lib/libz.a
	fi

	pushd thirdparty/ffmpeg
	clearAndEnterBuild
	# https://trac.ffmpeg.org/wiki/CompilationGuide/CrossCompilingForWindows
	../configure \
		--enable-static \
		--disable-shared \
		--disable-debug \
		--disable-muxers \
		--disable-hwaccels \
		--disable-encoders \
		--disable-filters \
		--disable-network \
		--disable-devices \
		--disable-doc \
		--disable-programs \
		--enable-gpl \
		--enable-version3 \
		--extra-ldflags="-L${G_TARGET}/lib -l:libz.a -l:liblzma.a" \
		--prefix=${G_TARGET} \
		--arch=${ARCH} \
		--target-os=${CROSS_OS} \
		--cross-prefix=${TRIPLE}-
	make install
	popd

	pushd thirdparty/ffms2
	#libtoolize --force
	#aclocal
	#autoheader
	#automake --force-missing --add-missing
	#autoupdate
	#autoconf
	#./autogen.sh
	#make distclean || true
	clearAndEnterBuild
	../configure \
		--prefix=${G_TARGET} \
		--with-zlib=${G_TARGET} \
		--enable-static \
		--disable-shared \
		--target=${TRIPLE} \
		--host=${TRIPLE} \
		--build=x86_64-linux
	make install-libLTLIBRARIES  # This weird target prevents building the command line tools.
	popd

	# === Known FFMPEG Types ===
	createExtensionHeader ffmpeg > ${G_GENERATED}/extensions.h

	# === Overlay Font ===
	createEmbeddedImage font

	# === Window Icon ===
	createEmbeddedImage icon

	# === Kangaroo Punch Logo ===
	createEmbeddedImage kangarooPunchLogo

	# === Singe Logo ===
	createEmbeddedImage singeLogo

	# === Laser Disc ===
	createEmbeddedImage laserDisc

	# === Magnifying Glass ===
	createEmbeddedImage magnifyingGlass

	# === "Indexing" Text ===
	createEmbeddedImage indexing

	# === Singe Framework ===
	createEmbeddedBinary assets/Framework.singe ${G_GENERATED}/Framework_singe.h FRAMEWORK_SINGE_H

	# === Default Config ===
	createEmbeddedBinary assets/controls.cfg ${G_GENERATED}/controls_cfg.h CONTROLS_CFG_H

	# === Singe Menu App ===
	createEmbeddedBinary assets/Menu.singe ${G_GENERATED}/Menu_singe.h MENU_SINGE_H

	# === Singe Menu Font ===
	createEmbeddedBinary assets/FreeSansBold.ttf ${G_GENERATED}/FreeSansBold_ttf.h FREESANSBOLD_TTF_H

	# === Singe Menu Background Video ===
	ffmpeg -i "assets/Singe Engine Intro.mpg" -filter:v 'crop=ih/3*4:ih' -vf scale=720:480 -c:v libx264 -c:a aac -f matroska ${G_TARGET}/temp1.mkv
	ffmpeg -i assets/180503_01_PurpleGrid.mp4 -filter:v 'crop=ih/3*4:ih' -vf scale=720:480 -c:v libx264 -c:a aac -f matroska ${G_TARGET}/temp2.mkv
	ffmpeg -f concat -safe 0 -i <(echo -e "file ${G_TARGET}/temp1.mkv\nfile ${G_TARGET}/temp2.mkv\n") -c copy ${G_TARGET}/menuBackground.mkv
	createEmbeddedBinary ${G_TARGET}/menuBackground.mkv ${G_GENERATED}/menuBackground_mkv.h MENUBACKGROUND_MKV_H
	rm ${G_TARGET}/temp1.mkv ${G_TARGET}/temp2.mkv ${G_TARGET}/menuBackground.mkv
#SKIP

:<<UNUSED
	# === Singe Manual ===
	#libreoffice --headless "-env:UserInstallation=file:///tmp/LibreOffice_Conversion_${USER}" --convert-to pdf:writer_pdf_Export Manual.odt
	documentbuilder makePDFs.docbuilder
	mv /tmp/Manual.pdf ${G_TARGET}/.
	createEmbeddedBinary ${G_TARGET}/Manual.pdf ${G_GENERATED}/Manual_pdf.h MANUAL_H
	rm ${G_TARGET}/Manual.pdf
UNUSED

	pushd ${G_TARGET}
	clearAndEnterBuild
	cmake ${COMMON} ${G_BUILDROOT}
	make
	upx -9 singe2${SUFFIX}
	mv -f singe2${SUFFIX} ../Singe-v2.10-${OS}-${ARCH}${SUFFIX}
	popd
}


function clearAndEnterBuild() {
	[[ -d ${G_BUILDDIR} ]] && rm -rf ${G_BUILDDIR}
	mkdir -p ${G_BUILDDIR}
	cd ${G_BUILDDIR}
}


function createEmbeddedBinary() {
	local BINFILE=$1
	local SOURCEFILE=$2   # This is assumed to be an absolute path
	local BLOCKER=$3
	local FILENAME=$(basename ${BINFILE})
	local DIRNAME=$(dirname ${BINFILE})

	outputLicense > ${SOURCEFILE}
	outputHeader ${BLOCKER} >> ${SOURCEFILE}
	printf "\n#ifdef EMBED_HERE\n\n" >> ${SOURCEFILE}
	pushd ${DIRNAME}
	xxd -i ${FILENAME} >> ${SOURCEFILE}
	popd
	printf "\n#else // EMBED_HERE\n\n" >> ${SOURCEFILE}
	printf "extern unsigned char ${FILENAME/\./_}[];\n" >> ${SOURCEFILE}
	printf "extern unsigned int ${FILENAME/\./_}_len;\n" >> ${SOURCEFILE}
	printf "\n#endif // EMBED_HERE\n\n" >> ${SOURCEFILE}
	outputFooter ${BLOCKER} >> ${SOURCEFILE}
}


function createEmbeddedImage() {
	local BASENAME=$1

	pushd assets
	convert -flatten ${BASENAME}.xcf ${G_GENERATED}/${BASENAME}.png
	createEmbeddedBinary ${G_GENERATED}/${BASENAME}.png ${G_GENERATED}/${BASENAME}.h ${BASENAME^^}_H
	rm ${G_GENERATED}/${BASENAME}.png
	popd
}


function createExtensionHeader() {
	local FFMPEG=$1
	local a=
	local c=0

	outputLicense
	outputHeader FFMPEG_EXTENSIONS_H
	printf "static char *ffmpegExtensions[] = {\n"
	printf "\t"
	getExtensions "${FFMPEG}" | sort | uniq -u | while read a; do
		printf "\"${a}\", "
		c=$((c + 1))
		if [[ ${c} -ge 10 ]]; then
			printf "\n\t"
			c=0
		fi
	done
	printf "0\n};"
	outputFooter FFMPEG_EXTENSIONS_H
}


function getExtensions() {
	local FFMPEG=$1
	local a=
	local b=
	local c=
	local d=
	local e=
	local f=
	local g=

	"${FFMPEG}" -demuxers 2> /dev/null | while read a b c; do
		if [[ "${a}x" == "Dx" ]]; then
			"${FFMPEG}" -h demuxer=${b} 2> /dev/null | grep "Common extensions" | while read d e f; do
				g=${f/./}
				echo -e "${g//,/\\n}"
			done
		fi
	done
}


function outputFooter() {
	local BLOCKER=$1

	printf "\n#pragma GCC diagnostic pop\n\n\n#endif // ${BLOCKER}\n"
}


function outputHeader() {
	local BLOCKER=$1

	printf "\n\n#ifndef ${BLOCKER}\n#define ${BLOCKER}\n\n\n"
	printf "// ===== THIS FILE IS AUTOMATICALLY GENERATED - DO NOT EDIT =====\n\n\n"
	printf "#pragma GCC diagnostic push\n#pragma GCC diagnostic ignored \"-Wunused-variable\"\n"
}


function outputLicense() {
	cat <<- LICENSE
		/*
		 *
		 *  Singe 2
		 *  Copyright (C) 2006-2024 Scott Duensing <scott@kangaroopunch.com>
		 *
		 * This program is free software; you can redistribute it and/or
		 * modify it under the terms of the GNU General Public License
		 * as published by the Free Software Foundation; either version 2
		 * of the License, or (at your option) any later version.
		 *
		 * This program is distributed in the hope that it will be useful,
		 * but WITHOUT ANY WARRANTY; without even the implied warranty of
		 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
		 * GNU General Public License for more details.
		 *
		 * You should have received a copy of the GNU General Public License
		 * along with this program; if not, write to the Free Software
		 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
		 *
		 */
	LICENSE
}


buildAll linux x86
buildAll linux x86_64
#buildAll macos aarch64
#buildAll macos x86   #***TODO*** Needs older SDL2
#buildAll macos x86_64   #***TODO*** Needs older SDL2
buildAll windows x86
buildAll windows x86_64