#!/bin/bash

# Cross-compiling script using https://github.com/mitchellh/gox
# This scripts build and archives binaries and supporting files.
# If directory ./server/static exists, it's asumed to contain
# TinodeWeb and then it's also copied and archived.

# Check if gox is installed. Abort otherwise.
command -v gox >/dev/null 2>&1 || {
  echo >&2 "This script requires https://github.com/mitchellh/gox. Please install it before running."; exit 1;
}

# Supported OSs: darwin windows linux
goplat=( darwin windows linux )
# Supported CPU architectures: amd64
goarc=( amd64 )
# Supported database tags
dbadapters=( mysql mongodb rethinkdb )
dbtags=( ${dbadapters[@]} alldbs )

for line in $@; do
  eval "$line"
done

version=${tag#?}

if [ -z "$version" ]; then
  # Get last git tag as release version. Tag looks like 'v.1.2.3', so strip 'v'.
  version=`git describe --tags`
  version=${version#?}
fi

echo "Releasing $version"

GOSRC=${GOPATH}/src/github.com/tinode

pushd ${GOSRC}/chat > /dev/null

# Prepare directory for the new release
rm -fR ./releases/${version}
mkdir ./releases/${version}

for plat in "${goplat[@]}"
do
  for arc in "${goarc[@]}"
  do
    # Keygen is database-independent
    # Remove previous build
    rm -f $GOPATH/bin/keygen
    # Build
    gox -osarch="${plat}/${arc}" -ldflags "-s -w" -output $GOPATH/bin/keygen ./keygen > /dev/null

    for dbtag in "${dbtags[@]}"
    do
      echo "Building ${dbtag}-${plat}/${arc}..."

      # Remove previous builds
      rm -f $GOPATH/bin/tinode
      rm -f $GOPATH/bin/init-db
      # Build tinode server and database initializer for RethinkDb and MySQL.
      # For 'alldbs' tag, we compile in all available DB adapters.
      if [ "$dbtag" = "alldbs" ]; then
        buildtag="${dbadapters[@]}"
      else
        buildtag=$dbtag
      fi
      gox -osarch="${plat}/${arc}" \
        -ldflags "-s -w -X main.buildstamp=`git describe --tags`" \
        -tags "${buildtag}" -output $GOPATH/bin/tinode ./server > /dev/null
      gox -osarch="${plat}/${arc}" \
        -ldflags "-s -w" \
        -tags "${buildtag}" -output $GOPATH/bin/init-db ./tinode-db > /dev/null

      # Tar on Mac is inflexible about directories. Let's just copy release files to
      # one directory.
      rm -fR ./releases/tmp
      mkdir -p ./releases/tmp/templ

      # Copy templates and database initialization files
      cp ./server/tinode.conf ./releases/tmp
      cp ./server/templ/*.templ ./releases/tmp/templ
      cp ./tinode-db/data.json ./releases/tmp
      cp ./tinode-db/*.jpg ./releases/tmp
      cp ./tinode-db/credentials.sh ./releases/tmp

      # Create directories for and copy TinodeWeb files.
      if [[ -d ./server/static ]]
      then
        mkdir -p ./releases/tmp/static/img
        mkdir ./releases/tmp/static/css
        mkdir ./releases/tmp/static/audio
        mkdir ./releases/tmp/static/src
        mkdir ./releases/tmp/static/umd

        cp ./server/static/img/*.png ./releases/tmp/static/img
        cp ./server/static/img/*.svg ./releases/tmp/static/img
        cp ./server/static/audio/*.mp3 ./releases/tmp/static/audio
        cp ./server/static/css/*.css ./releases/tmp/static/css
        cp ./server/static/index.html ./releases/tmp/static
        cp ./server/static/index-dev.html ./releases/tmp/static
        cp ./server/static/umd/*.js ./releases/tmp/static/umd
        cp ./server/static/manifest.json ./releases/tmp/static
        cp ./server/static/service-worker.js ./releases/tmp/static
        # Create empty FCM client-side config.
        echo > ./releases/tmp/static/firebase-init.js
      else
        echo "TinodeWeb not found, skipping"
      fi

      # Build archive. All platforms but Windows use tar for archiving. Windows uses zip.
      if [ "$plat" = "windows" ]; then
        # Copy binaries
        cp $GOPATH/bin/tinode.exe ./releases/tmp
        cp $GOPATH/bin/init-db.exe ./releases/tmp
        cp $GOPATH/bin/keygen.exe ./releases/tmp

        # Remove possibly existing archive.
        rm -f ./releases/${version}/tinode-${dbtag}."${plat}-${arc}".zip
        # Generate a new one
        pushd ./releases/tmp > /dev/null
        zip -q -r ../${version}/tinode-${dbtag}."${plat}-${arc}".zip ./*
        popd > /dev/null
      else
        plat2=$plat
        # Rename 'darwin' tp 'mac'
        if [ "$plat" = "darwin" ]; then
          plat2=mac
        fi
        # Copy binaries
        cp $GOPATH/bin/tinode ./releases/tmp
        cp $GOPATH/bin/init-db ./releases/tmp
        cp $GOPATH/bin/keygen ./releases/tmp

        # Remove possibly existing archive.
        rm -f ./releases/${version}/tinode-${dbtag}."${plat2}-${arc}".tar.gz
        # Generate a new one
        tar -C ${GOSRC}/chat/releases/tmp -zcf ./releases/${version}/tinode-${dbtag}."${plat2}-${arc}".tar.gz .
      fi
    done
  done
done

# Need to rebuild the linux-rethink binary without stripping debug info.
echo "Building the binary for web.tinode.co"

rm -f $GOPATH/bin/tinode
rm -f $GOPATH/bin/init-db

gox -osarch=linux/amd64 \
  -ldflags "-X main.buildstamp=`git describe --tags`" \
  -tags rethinkdb -output $GOPATH/bin/tinode ./server > /dev/null
gox -osarch=linux/amd64 \
  -tags rethinkdb -output $GOPATH/bin/init-db ./tinode-db > /dev/null

# Build chatbot release
echo "Building python code..."

./build-py-grpc.sh

# Release chatbot
echo "Packaging chatbot.py..."
rm -fR ./releases/tmp
mkdir -p ./releases/tmp

cp ${GOSRC}/chat/chatbot/python/chatbot.py ./releases/tmp
cp ${GOSRC}/chat/chatbot/python/quotes.txt ./releases/tmp
cp ${GOSRC}/chat/chatbot/python/requirements.txt ./releases/tmp

tar -C ${GOSRC}/chat/releases/tmp -zcf ./releases/${version}/py-chatbot.tar.gz .
pushd ./releases/tmp > /dev/null
zip -q -r ../${version}/py-chatbot.zip ./*
popd > /dev/null

# Release tn-cli
echo "Packaging tn-cli..."

rm -fR ./releases/tmp
mkdir -p ./releases/tmp

cp ${GOSRC}/chat/tn-cli/*.py ./releases/tmp
cp ${GOSRC}/chat/tn-cli/requirements.txt ./releases/tmp

tar -C ${GOSRC}/chat/releases/tmp -zcf ./releases/${version}/tn-cli.tar.gz .
pushd ./releases/tmp > /dev/null
zip -q -r ../${version}/tn-cli.zip ./*
popd > /dev/null

# Clean up temporary files
rm -fR ./releases/tmp

popd > /dev/null