#!/bin/bash

# Run from the source dir.
SRCDIR=${PWD}

# TODO replace w/ wget
LZMA="xz-5.2.1"
LZMA_FILE="${SRCDIR}/../${LZMA}.tar.gz"

MAKEFLAGS="-j 10"

BUILDDIR=${SRCDIR}/build
LZMASRC=${BUILDDIR}/${LZMA}

NONWIN_CFLAGS=""
MINGW_CFLAGS="-DEXTERNAL_COMPRESSION=0 -DXD3_WIN32=1 -DSHELL_TESTS=0"

MYOS=`uname`
DATE=`date`

CLEAN=""

LINUXTGTS=""
LINUXTEST1=""
LINUXTEST2=""

WINTGTS=""
WINTEST1=""
WINTEST2=""

OSXTGTS=""
OSXTEST1=""
OSXTEST2=""

XTMP="/tmp"
if [ "${TMP}" != "" ]; then
    XTMP="${TMP}"
fi
if [ "${TMPDIR}" != "" ]; then
    XTMP="${TMPDIR}"
fi

BUILDFILES=`ls -A ${BUILDDIR} 2> /dev/null`
if [ -d "${BUILDDIR}" ]; then
    if [ -n "${BUILDFILES}" ]; then
	echo "Directory ${BUILDDIR} should be empty"
	exit 1
    fi
else
    mkdir "${BUILDDIR}"
fi

function setup {
    libtoolize || glibtoolize
    automake --add-missing
    aclocal -I m4
    autoheader
    automake
    autoconf
}

function try {
    local w=$1
    shift
    local dir=$1
    shift
    echo -n "	${w} ... "
    (cd "${dir}" && "$@" >${w}.stdout 2>${w}.stderr)
    local s=$?
    if [ ${s} -eq 0 ]; then
	echo " success"
    else
	echo " failed!"
	echo "Error $1 in ${dir}" >&2
    fi
    return ${s}
}

function buildlzma {
    host=$1
    march=$2
    local target="${BUILDDIR}/lib-${host}${march}"

    echo "	... liblzma"
    
    mkdir -p ${target}

    try configure-lzma ${target} ${LZMASRC}/configure \
	--host=${host} \
	--prefix=${target} \
	--disable-shared \
	"CC=${CC}" \
	"CXX=${CXX}" \
	"CFLAGS=${march}" \
	"CXXFLAGS=${march}" \
	"LDFLAGS=${march}"
    if [ $? -ne 0 ]; then
	return
    fi

    try build-lzma ${target} make ${MAKEFLAGS}
    if [ $? -ne 0 ]; then
    	return
    fi
    try install-lzma ${target} make install
    if [ $? -ne 0 ]; then
    	return
    fi
}

function buildit {
    local host=$1
    local march=$2
    local usizebits=$3
    local offsetbits=$4
    local cargs=$5
    local afl=$6
    local BM="${host}${march}"
    local USECC="${CC}"
    local USECXX="${CXX}"
    local LIBBM="${BM}"

    if [ "${afl}" = "1" ]; then
	USECC="afl-gcc"
	USECXX="afl-g++"
	BM="${BM}-afl"
    fi

    local D="build/${BM}/usize${usizebits}/xoff${offsetbits}"
    local BMD="${BM}-${usizebits}-${offsetbits}"

    local FULLD="${SRCDIR}/${D}"
    local CFLAGS="${march} ${cargs} -I${SRCDIR}/build/lib-${LIBBM}/include"
    local CXXFLAGS="${march} ${cargs} -I${SRCDIR}/build/lib-${LIBBM}/include"
    local CPPFLAGS="-I${SRCDIR}/build/lib-${LIBBM}/include"
    local LDFLAGS="${march} -L${SRCDIR}/build/lib-${LIBBM}/lib"

    local EXEC_PREAMBLE=""
    local EXEC_SUFFIX=""

    case ${host} in
	*mingw*)
	    EXEC_PREAMBLE="wine"
	    EXEC_SUFFIX=".exe"
	    ;;
    esac
    
    mkdir -p ${D}

    echo "	... ${BMD}"
    
    cat >> Makefile.test <<EOF

# ${BMD}
# ${CFLAGS}
.PHONY: build-${BMD}
build-${BMD}:
	(cd ${D} && make all && make install)

.PHONY: clean-${BMD}
clean-${BMD}:
	(cd ${D} && make clean)

.PHONY: regtest-${BMD}
regtest-${BMD}:
	(cd ${D} && ${EXEC_PREAMBLE} ./bin/xdelta3regtest${EXEC_SUFFIX} 1> \${TMP}/regtest.${BMD}.stdout 2> \${TMP}/regtest.${BMD}.stderr)

.PHONY: selftest-${BMD}
selftest-${BMD}:
	(cd ${D} && ${EXEC_PREAMBLE} ./bin/xdelta3${EXEC_SUFFIX} test 1> \${TMP}/selftest.${BMD}.stdout 2> \${TMP}/selftest.${BMD}.stderr)


EOF

    case ${host} in
	*linux*)
	    LINUXTGTS="${LINUXTGTS} build-${BMD}"
	    LINUXTEST1="${LINUXTEST1} selftest-${BMD}"
	    LINUXTEST2="${LINUXTEST2} regtest-${BMD}"
	    ;;
	*mingw*)
	    WINTGTS="${WINTGTS} build-${BMD}"
	    WINTEST1="${WINTEST1} selftest-${BMD}"
	    WINTEST2="${WINTEST2} regtest-${BMD}"
	    ;;
	*apple*)
	    OSXTGTS="${OSXTGTS} build-${BMD}"
	    OSXTEST1="${OSXTEST1} selftest-${BMD}"
	    OSXTEST2="${OSXTEST2} regtest-${BMD}"
	    ;;
    esac
    CLEAN="${CLEAN} clean-${BMD}"

    try configure-xdelta ${FULLD} ${SRCDIR}/configure \
    		  --host=${host} \
    		  --prefix=${FULLD} \
    		  --enable-static \
    		  --disable-shared \
    		  --enable-debug-symbols \
		  "CFLAGS=${CFLAGS}" \
		  "CXXFLAGS=${CXXFLAGS}" \
		  "CPPFLAGS=${CPPFLAGS}" \
		  "LDFLAGS=${LDFLAGS}" \
		  "CC=${USECC}" \
		  "CXX=${USECXX}"
    if [ $? -ne 0 ]; then
	return
    fi

    # try build-xdelta ${FULLD} make ${MAKEFLAGS} all
    # if [ $? -ne 0 ]; then
    # 	return
    # fi

    # try install-xdelta ${FULLD} make install
}

function buildall {
    echo ""
    echo "Host $1$2 afl=$4"
    echo ""

    buildlzma "$1" "$2"
    buildit "$1" "$2" 32 32 "-DXD3_USE_LARGESIZET=0 -DXD3_USE_LARGEFILE64=0 $3" "$4"
    buildit "$1" "$2" 32 64 "-DXD3_USE_LARGESIZET=0 -DXD3_USE_LARGEFILE64=1 $3" "$4"
    buildit "$1" "$2" 64 64 "-DXD3_USE_LARGESIZET=1 -DXD3_USE_LARGEFILE64=1 $3" "$4"
}

setup

try untar-lzma ${BUILDDIR} tar -xvf "${LZMA_FILE}"
if [ $? -ne 0 ]; then
    exit $?
fi

cat > Makefile.test <<EOF
# Auto-generated ${DATE} -*- Mode: Makefile -*-
TMP = ${XTMP}

all: linux windows apple

EOF

# Native compiles
if [ "${MYOS}" == "Linux" ]; then
    # Linux
    buildall x86_64-pc-linux-gnu -m32 "${NONWIN_CFLAGS}" "0"
    buildall x86_64-pc-linux-gnu -m32 "${NONWIN_CFLAGS}" "1"
    buildall x86_64-pc-linux-gnu -m64 "${NONWIN_CFLAGS}" "0"
    buildall x86_64-pc-linux-gnu -m64 "${NONWIN_CFLAGS}" "1"
fi

if [ "${MYOS}" == "Darwin" ]; then
    # OS X
    buildall x86_64-apple-darwin -m32 "${NONWIN_CFLAGS}" "0"
    buildall x86_64-apple-darwin -m64 "${NONWIN_CFLAGS}" "0"
fi

# Cross compile
buildall i686-w64-mingw32 -mconsole "${MINGW_CFLAGS}" "0"
buildall x86_64-w64-mingw32 -mconsole "${MINGW_CFLAGS}" "0"

cat >> Makefile.test <<EOF

clean: ${CLEAN}

.PHONY: linux windows apple
.PHONY: linux-build windows-build apple-build
.PHONY: linux-selftest windows-selftest apple-selftest
.PHONY: linux-regtest windows-regtest apple-regtest

linux: linux-build linux-selftest linux-regtest
windows: windows-build windows-selftest windows-regtest
apple: apple-build apple-selftest apple-regtest

linux-build: ${LINUXTGTS}
linux-selftest: ${LINUXTEST1}
linux-regtest: ${LINUXTEST2}

windows-build: ${WINTGTS}
windows-selftest: ${WINTEST1}
windows-regtest: ${WINTEST2}

apple-build: ${OSXTGTS}
apple-selftest: ${OSXTEST1}
apple-regtest: ${OSXTEST2}

EOF