#! /usr/bin/env bash

# This script cross compiles aubio for windows using mingw, four times:
#
#  - 32 and 64 bits with no external dependencies
#  - 32 and 64 bits against ffmpeg
#
# On debian or ubuntu, you will want to 'apt-get install gcc-mingw-w64'

set -e
set -x

python this_version.py -v
VERSION=`python $PWD/this_version.py -v`

FFMPEG_BUILDS_URL="https://ffmpeg.zeranoe.com/builds"
FFMPEG_DEFAULT="3.3.3"

# define some default CFLAGS
DEF_CFLAGS="-Os -I/usr/share/mingw-w64"
DEF_LDFLAGS=""

WAFOPTS=""
# disable external deps to make sure we don't try to use the host package
WAFOPTS+=" --disable-samplerate --disable-jack --disable-sndfile"
# enable ffmpeg build
WAFOPTS+=" --disable-avcodec"
# install without a prefix
WAFOPTS+=" --prefix=/"
# compile the tests, but fake running them
# passing this option WAFOPTS fails (escaping?), added in actual waf call below
#WAFOPTS+=" --testcmd='echo %s'"

# debugging
#WAFOPTS+=" -v"
#WAFOPTS+=" -j1"
#WAFOPTS+=" --notests"

function fetch_ffpmeg() {
  ## manually add ffmpeg (no pkg-config .pc files in bins)
  [ -n "$FFMPEG_VERSION" ] || FFMPEG_VERSION=$FFMPEG_DEFAULT
  FFMPEG_TARBALL="$PWD/ffmpeg-$FFMPEG_VERSION-$TARGET-dev.zip"
  FFMPEG_BINARIES="${FFMPEG_TARBALL%%.zip}"
  if [ ! -d "$FFMPEG_BINARIES" ]
  then
    if [ ! -f "$FFMPEG_TARBALL" ]
    then
      curl -O $FFMPEG_BUILDS_URL/$TARGET/dev/ffmpeg-$FFMPEG_VERSION-$TARGET-dev.zip
    else
      echo "using $FFMPEG_TARBALL"
    fi
    unzip -x $FFMPEG_TARBALL
  else
    echo "using $FFMPEG_BINARIES"
  fi
}

function get_cflags() {
  CFLAGS="$DEF_CFLAGS"
  LDFLAGS="$DEF_LDFLAGS"
  if [ -n "$WITH_FFMEG" ]
  then
    fetch_ffpmeg
    CFLAGS+=" -DHAVE_LIBAV=1 -DHAVE_SWRESAMPLE=1"
    CFLAGS+=" -I$FFMPEG_BINARIES/include"
    LDFLAGS+=" -lavcodec -lavformat -lavutil -lswresample"
    LDFLAGS+=" -L$FFMPEG_BINARIES/lib"
  fi
}

function build_mingw() {
  DESTDIR="$PWD/aubio-$VERSION-$TARGET"
  [ -n "$WITH_FFMEG" ] && DESTDIR+="-ffmpeg"
  [ -f $DESTDIR.zip ] && echo "Remove existing $DESTDIR.zip first" && exit 1
  [ -d $DESTDIR ] && rm -rf $DESTDIR
  WAFOPTS_TGT="$WAFOPTS --destdir=$DESTDIR"
  WAFOPTS_TGT+=" --with-target-platform=$TARGET"
  get_cflags
  CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" \
    ./waf distclean configure build install $WAFOPTS_TGT --testcmd='echo %s'
  # fix dll location (see https://github.com/waf-project/waf/issues/1860)
  mv $DESTDIR/lib/libaubio-5.dll $DESTDIR/bin
  mv $DESTDIR/lib/libaubio-5.def $DESTDIR/bin
  zip -r $DESTDIR.zip `basename $DESTDIR`
  rm -rf $DESTDIR
  sha256sum $DESTDIR.zip > $DESTDIR.zip.sha256
}

function build_mingw32() {
  TARGET=win32
  export CC=i686-w64-mingw32-gcc
  export NM=i686-w64-mingw32-nm
  build_mingw
}

function build_mingw64() {
  TARGET=win64
  export CC=x86_64-w64-mingw32-gcc
  export NM=x86_64-w64-mingw32-nm
  build_mingw
}

# fetch waf if needed
[ -f "waf" ] || make getwaf

# first build without ffmpeg
build_mingw32
build_mingw64

# then build against ffmpeg
WITH_FFMEG=1
build_mingw32
build_mingw64

set +x
echo ""
echo "All done! The following files were generated:"
echo ""
ls -lart aubio*.zip*
