#!/bin/bash -e

#
#  JoeyLib
#  Copyright (C) 2018-2019 Scott Duensing <scott@kangaroopunch.com>
#
#  This software is provided 'as-is', without any express or implied
#  warranty.  In no event will the authors be held liable for any damages
#  arising from the use of this software.
#
#  Permission is granted to anyone to use this software for any purpose,
#  including commercial applications, and to alter it and redistribute it
#  freely, subject to the following restrictions:
#
#  1. The origin of this software must not be misrepresented; you must not
#     claim that you wrote the original software. If you use this software
#     in a product, an acknowledgment in the product documentation would be
#     appreciated but is not required.
#  2. Altered source versions must be plainly marked as such, and must not be
#     misrepresented as being the original software.
#  3. This notice may not be removed or altered from any source distribution.
#


#
# Global variables
#
G_TITLE="JoeyLib Installer"
G_PARENT=


function buildPCDeps() {
	local DIST=$1
	local PREFIX=$2
	local CROSS=$3
	local CC_EXPORT=$4
	local CXX_EXPORT=$5
	local CC_OLD=$CC
	local CXX_OLD=$CXX
	local SRC="${G_PARENT}/joeylib/joeylib/src"
	local G_CFLAGS="-Wall -D_REENTRANT_ -I${SRC} -c"

	echo ""
	tBoldBox tCYAN "NOTE:  If an error is encountered, installer will exit!"

	# Clear any existing built libraries
	if [[ -d ${PREFIX} ]]; then
		rm -rf ${PREFIX}
	fi
	mkdir -p ${PREFIX}

	pushd deps >& /dev/null

	export CC="${CC_EXPORT}"
	export CXX="${CXX_EXPORT}"

	# SDL2
	if [[ ! -d SDL ]]; then
		echo ""
		tBoldBox tPURPLE "Building SDL2"
		echo ""
		hg clone http://hg.libsdl.org/SDL
		clearPCDepsBuild
		pushd build >& /dev/null
		../SDL/configure \
			--target="${CROSS}" \
			--host="${CROSS}" \
			--build=x86_64-linux \
			--enable-static \
			--disable-shared \
			--prefix=${PREFIX}
		make
		make install
		popd >& /dev/null
	fi

	# libModPlug
	if [[ ! -d libmodplug ]]; then
		echo ""
		tBoldBox tPURPLE "Building libModPlug"
		echo ""
		git clone https://github.com/Konstanty/libmodplug.git
		pushd libmodplug >& /dev/null
		libtoolize --force
		aclocal
		autoheader
		automake --force-missing --add-missing
		autoconf
		popd >& /dev/null
		clearPCDepsBuild
		pushd build >& /dev/null
		../libmodplug/configure \
			--target="${CROSS}" \
			--host="${CROSS}" \
			--build=x86_64-linux \
			--enable-static \
			--disable-shared \
			--prefix=${PREFIX}
		make
		make install
		popd >& /dev/null
	fi

	# SDL_mixer
	if [[ ! -d SDL_mixer ]]; then
		echo ""
		tBoldBox tPURPLE "Building SDL_mixer"
		echo ""
		hg clone http://hg.libsdl.org/SDL_mixer
		clearPCDepsBuild
		pushd build >& /dev/null
		MODPLUG_CFLAGS="-I${PREFIX}/include -DMODPLUG_STATIC" \
		MODPLUG_LIBS="-L${PREFIX}/lib -lmodplug -lstdc++ -lm" \
		../SDL_mixer/configure \
			--target="${CROSS}" \
			--host="${CROSS}" \
			--build=x86_64-linux \
			--enable-static \
			--disable-shared \
			--prefix=${PREFIX} \
			--with-sdl-prefix=${PREFIX} \
			--disable-music-cmd \
			--disable-music-wave \
			--enable-music-mod-modplug \
			--disable-music-mod-modplug-shared \
			--disable-music-mod-mikmod \
			--disable-music-midi \
			--disable-music-ogg \
			--disable-music-flac \
			--disable-music-opus \
			--disable-music-mp3 \
			--disable-music-mp3-mpg123
		make
		make install
		popd >& /dev/null
	fi

	export CC="${CC_OLD}"
	export CXX="${CXX_OLD}"

	# JoeyLib
	echo ""
	tBoldBox tPURPLE "Building JoeyLib"
	echo ""
	if [[ -d "${DIST}" ]]; then
		rm -rf "${DIST}"
	fi
	mkdir -p "${DIST}"
	clearPCDepsBuild
	pushd build >& /dev/null
	${CC_EXPORT} ${G_CFLAGS} -o jPC.o ${SRC}/jPC.c
	${CC_EXPORT} ${G_CFLAGS} -o joey.o ${SRC}/joey.c
	ar x ${PREFIX}/lib/libSDL2.a
	ar x ${PREFIX}/lib/libSDL2_mixer.a
	ar x ${PREFIX}/lib/libmodplug.a
	ar rcs ${DIST}/libjoeylib.a *.o
	cp -f ${SRC}/joey.h ${DIST}/../..
	cp -f ${SRC}/../joey.pri ${DIST}/../..
	popd >& /dev/null

	popd >& /dev/null
}


function clearPCDepsBuild() {
	if [[ -d $(pwd)/build ]]; then
		rm -rf $(pwd)/build
	fi
	mkdir -p $(pwd)/build
}


function installLinux32() {
	buildPCDeps \
		"$(pwd)/../dist/linux/i386" \
		"$(pwd)/deps/installed/linux/i386" \
		"x86_64-linux-gnu" \
		"x86_64-linux-gnu-gcc -m32" \
		"x86_64-linux-gnu-g++ -m32"
}


function installLinux64() {
	buildPCDeps \
		"$(pwd)/../dist/linux/x64" \
		"$(pwd)/deps/installed/linux/x64" \
		"x86_64-linux-gnu" \
		"x86_64-linux-gnu-gcc" \
		"x86_64-linux-gnu-g++"
}


function installWin32() {
	buildPCDeps \
		"$(pwd)/../dist/windows/i386" \
		"$(pwd)/deps/installed/windows/i386" \
		"i686-w64-mingw32" \
		"i686-w64-mingw32-gcc -static-libgcc" \
		""
}


function installWin64() {
	buildPCDeps \
		"$(pwd)/../dist/windows/x64" \
		"$(pwd)/deps/installed/windows/x64" \
		"x86_64-w64-mingw32" \
		"x86_64-w64-mingw32-gcc -static-libgcc" \
		"x86_64-w64-mingw32-g++ -static-libstdc++"
}


function mainMenu() {
	local ITEMS=(
#		"IIgs" "Amiga" "ST"
		"Linux32" "Linux64"
		"Win32" "Win64"
#		"macOS32" "macOS64"
#		"Android" "iOS"
	)
	local DESC=(
#		"Apple IIgs 16" "Commodore Amiga 16" "Atari ST 16"
		"Linux 32" "Linux 64"
		"Windows 32" "Windows 64"
#		"macOS 32" "macOS 64"
#		"Android 32" "iOS 64"
	)
	local TOTAL=${#ITEMS[*]}
	local MENU=()
	local X=
	local CHOICE="x"

	while [[ "${CHOICE}" != "" ]]; do
		MENU=()
		for (( X=0; X<=$(( ${TOTAL}-1 )); X++ )); do
			MENU+=( "${ITEMS[$X]}" )
			MENU+=( "Install ${DESC[$X]} Bit JoeyLib Library" )
		done
		CHOICE=$(
			set e+
			whiptail --title "${G_TITLE}" --cancel-button "Exit" --menu "" $(( ${TOTAL}+7 )) 65 ${TOTAL} "${MENU[@]}" 3>&2 2>&1 1>&3
			set e-
		)
		if [[ "${CHOICE}" != "" ]]; then
			CHOICE="install${CHOICE}"
			${CHOICE}
		fi
	done
}


# --- START

if [[ $EUID -ne 0 ]]; then
	echo "The installer must be run as root."
	exit 1
fi

mkdir -p installerWork

# Do we have Towel yet?
if [[ ! -f installerWork/towel/towel.sh ]]; then
	# Do we have GIT?
	if [[ "$(which git || true)" == "" ]]; then
		echo "Installing git..."
		apt-get -y install git >& /dev/null
	fi
	echo "Downloading towel.sh support library..."
	git clone https://skunkworks.kangaroopunch.com/skunkworks/towel.git installerWork/towel >& /dev/null
fi

# Load Towel
source installerWork/towel/towel.sh

# Remember where we live.
G_PARENT=$(pwd)

# Don't change directories until Towel is loaded.
pushd installerWork >& /dev/null

:<<'SKIP'
# See if all the packages we need are installed
echo ""
tBoldBox tBLUE "Examining system..."
tCheckPackages MISSING cmake ragel hfsplus hfsutils hfsprogs libreadline-dev libedit-dev \
	build-essential git mercurial texinfo libtool autoconf automake \
	gcc-multilib g++-multilib mingw-w64 gdb-mingw-w64 clang llvm-dev libxml2-dev \
	uuid-dev libssl-dev bash patch make tar xz-utils bzip2 gzip sed cpio \
	libpulse-dev{,:i386} libasound-dev{,:i386} \
	libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libfreetype6-dev libpcap0.8-dev \
	php-cli

if [[ "${MISSING}" != "" ]]; then
	if (whiptail --title "${G_TITLE}" --yesno "Some required packages are missing.\n\nInstall them now?" 9 40); then
		TEMP=" ${MISSING//[^ ]}"
		TOTAL=${#TEMP}
		COUNT=0
		{
			for PACKAGE in ${MISSING}; do
				PERCENT=$(( 100*(++COUNT)/TOTAL ))
				echo ${PERCENT}
				apt-get -y install ${PACAKGE} >& /dev/null
			done
		} | whiptail --title "${G_TITLE}" --gauge "\nInstalling packages..." 7 50 0
	else
		tBoldBox tRED "Canceled!"
		echo ""
		echo "Installation cannot continue without the following pacakges:"
		echo ""
		echo ${MISSING}
		echo ""
		exit 1
	fi
fi
SKIP

# Do we have JoeyLib yet?
if [[ ! -f ${G_PARENT}/joeylib/LICENSE ]]; then
	echo ""
	tBoldBox tBLUE "Downloading JoeyLib source..."
	git clone https://skunkworks.kangaroopunch.com/skunkworks/joeylib.git ${G_PARENT}/joeylib >& /dev/null
fi

mainMenu

clear
tBoldBox tBLUE "Goodbye!"
echo ""

# --- EXIT
popd  >& /dev/null