BUILDTHREADS=${BUILDTHREADS:-1}
SDK_VERSION=${SDK_VERSION:-"Default"}
Configuration=${Configuration:-"Default"}
XBMC_DEPENDS_ROOT=${XBMC_DEPENDS_ROOT:-"Default"}
PATH_CHANGE_REV_FILENAME=".last_success_revision"

#set platform defaults
#$XBMC_PLATFORM_DIR matches the platform subdirs!
case $XBMC_PLATFORM_DIR in
  atv2)
    DEFAULT_SDK_VERSION=4.3
    DEFAULT_XBMC_DEPENDS_ROOT=$WORKSPACE/tools/depends/xbmc-depends
    DEFAULT_CONFIGURATION="Debug"
    ;;

  ios)
    DEFAULT_SDK_VERSION=4.3
    DEFAULT_XBMC_DEPENDS_ROOT=$WORKSPACE/tools/depends/xbmc-depends
    DEFAULT_CONFIGURATION="Debug"
    ;;

  osx32)
    DEFAULT_SDK_VERSION=10.8
    DEFAULT_XBMC_DEPENDS_ROOT=$WORKSPACE/tools/depends/xbmc-depends
    DEFAULT_CONFIGURATION="Debug"
    ;;

  osx64)
    DEFAULT_SDK_VERSION=10.8
    DEFAULT_XBMC_DEPENDS_ROOT=$WORKSPACE/tools/depends/xbmc-depends
    DEFAULT_CONFIGURATION="Debug"
    ;;

  android)
    DEFAULT_SDK_VERSION=10
    DEFAULT_XBMC_DEPENDS_ROOT=$WORKSPACE/tools/depends/xbmc-depends
    DEFAULT_CONFIGURATION="Debug"
    ;;

  linux*)
    DEFAULT_XBMC_DEPENDS_ROOT=$WORKSPACE/tools/depends/xbmc-depends
esac

if [ $SDK_VERSION == "Default" ]
then
  SDK_VERSION=$DEFAULT_SDK_VERSION
fi

if [ $XBMC_DEPENDS_ROOT == "Default" ]
then
  XBMC_DEPENDS_ROOT=$DEFAULT_XBMC_DEPENDS_ROOT
fi

if [ $Configuration == "Default" ]
then
  Configuration=$DEFAULT_CONFIGURATION
fi

#clamp release builds to 1 thread only
if [ $Configuration == "Release" ]
then
  BUILDTHREADS=1
fi

#helper functions

#hash a dir based on the git revision, SDK_PATH, NDK_PATH, SDK_VERSION, TOOLCHAIN and XBMC_DEPENDS_ROOT
function getBuildHash ()
{
  local checkPath
  checkPath="$1"
  local hashStr
  hashStr="$(git rev-list HEAD --max-count=1  -- $checkPath)"
  hashStr="$hashStr $SDK_PATH $NDK_PATH $SDK_VERSION $TOOLCHAIN $XBMC_DEPENDS_ROOT"
  echo $hashStr
}

function pathChanged ()
{
  local ret
  local checkPath
  ret="0"
  #no optims in release builds!
  if [ $Configuration == "Release" ]
  then
    echo "1"
    return
  fi

  checkPath="$1"
  if [ -e $checkPath/$PATH_CHANGE_REV_FILENAME ]
  then
    if [ "$(cat $checkPath/$PATH_CHANGE_REV_FILENAME)" != "$(getBuildHash $WORKSPACE/tools/depends)" ]
    then
      ret="1"
    fi
  else
    ret="1"
  fi
  
  echo $ret
}

function tagSuccessFulBuild ()
{
  local checkPath
  checkPath="$1"
  echo "$(getBuildHash $checkPath)" > $checkPath/$PATH_CHANGE_REV_FILENAME
}

function getBuildRevDateStr ()
{
  local revStr
  #fetch date-rev
  revStr=`git --no-pager log --abbrev=7 -n 1 --pretty=format:"%h %ci" HEAD | awk '{gsub("-", "");print $2"-"$1}' 2>/dev/null`
  if [ "$?" == "0" ]
  then
    #fetch the first branch containing head
    revStr=$revStr"-"`git branch -r --contains HEAD | head -n1 | awk '{gsub(".*/","");print $1}'`
    if [ "$?" == "0" ]
    then
      echo $revStr
    else
      echo "Unknown"
    fi
  else
    echo "Unknown"
  fi
}