#!/usr/bin/env bash

cd "$(dirname "$0")" >/dev/null && [ -f x264.h ] || exit 1

echo "#define XSTR(x) STR(x)"
echo "#define STR(x) #x"

git rev-list HEAD | sort > config.git-hash
LOCAL_VER=`wc -l config.git-hash | awk '{print $1}'`
GIT_HEAD=`git branch --list | grep "*" | awk '{print $2}'`
BIT_DEPTH=`grep "X264_BIT_DEPTH" < x264_config.h | awk '{print $3}'`
if [ $BIT_DEPTH == "0" ] ; then
    BIT_DEPTH="all"
fi
CHROMA_FORMATS=`grep "X264_CHROMA_FORMAT" < x264_config.h | awk '{print $3}'`
if [ $CHROMA_FORMATS == "0" ] ; then
    CHROMA_FORMATS="all"
elif [ $CHROMA_FORMATS == "X264_CSP_I420" ] ; then
    CHROMA_FORMATS="4:2:0"
elif [ $CHROMA_FORMATS == "X264_CSP_I422" ] ; then
    CHROMA_FORMATS="4:2:2"
elif [ $CHROMA_FORMATS == "X264_CSP_I444" ] ; then
    CHROMA_FORMATS="4:4:4"
fi
BUILD_ARCH=`grep "ARCH=" < config.mak | awk -F= '{print $2}'`
if [ $LOCAL_VER \> 1 ] ; then
    PLAIN_VER=`git rev-list porigin/stable | sort | join config.git-hash - | wc -l | awk '{print $1}'`
    DEV_VER=`git rev-list origin/devel | sort | join config.git-hash - | wc -l | awk '{print $1}'`
    echo "#define X264_REV $PLAIN_VER"
    if [ $PLAIN_VER == $LOCAL_VER ] ; then
        VER=$PLAIN_VER
    else
        if [ $PLAIN_VER == $DEV_VER ] ; then
            VER_DIFF=$(($LOCAL_VER-$PLAIN_VER))
            VER="$PLAIN_VER+$VER_DIFF"
        else
            VER_DIFF=$(($LOCAL_VER-$DEV_VER))
            DEV_DIFF=$(($DEV_VER-$PLAIN_VER))
            VER="$PLAIN_VER+$DEV_DIFF+$VER_DIFF"
            VER_DIFF=$(($LOCAL_VER-$PLAIN_VER))
        fi
    fi
    echo "#define X264_REV_DIFF $VER_DIFF"
    # if git status | grep -q "modified:" ; then
    #     VER="${VER}M"
    # fi
    VER="$VER $(git rev-list HEAD -n 1 | cut -c 1-7) $GIT_HEAD [${BIT_DEPTH}-bit@${CHROMA_FORMATS} ${BUILD_ARCH}]"
    CCTAG='"[GCC " XSTR(__GNUC__) "." XSTR(__GNUC_MINOR__) "." XSTR(__GNUC_PATCHLEVEL__) "]"'
    echo "#define X264_VERSION \" r$VER\" $CCTAG"
else
    echo "#define X264_VERSION \"\""
    VER="x [${BIT_DEPTH}-bit@${CHROMA_FORMATS} ${BUILD_ARCH}]"
fi
rm -f config.git-hash
API=`grep '#define X264_BUILD' < x264.h | sed -e 's/.* \([1-9][0-9]*\).*/\1/'`
echo "#define X264_POINTVER \"0.$API.$VER\""