#!/bin/bash

# Generate JS bindings for Cocos2D-X
# ... using Android NDK system headers
# ... and automatically update submodule references
# ... and push these changes to remote repos

# Dependencies
#
# For bindings generator:
# (see ../../../tojs/genbindings.sh
# ... for the defaults used if the environment is not customized)
#
#  * $PYTHON_BIN
#  * $CLANG_ROOT
#  * $NDK_ROOT
#
# For automatically pushing changes:
#
#  * REMOTE_COCOS2DX_REPOSITORY
#  * REMOTE_AUTOGEN_BINDINGS_REPOSITORY
#  * Ensure you have ssh access to above repositories

# Exit on error
set -e

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
COCOS2DX_ROOT="$DIR"/../../../..

# 1. Generate JS bindings
COCOS2DX_ROOT="$COCOS2DX_ROOT" /bin/bash ../../../tojs/genbindings.sh

echo
echo Bindings generated successfully
echo

if [ -z "${REMOTE_AUTOGEN_BINDINGS_REPOSITORY+aaa}" ]; then
    echo
    echo Environment variable must be set REMOTE_AUTOGEN_BINDINGS_REPOSITORY
    echo This script expects to automatically push changes
    echo to this repo
    echo
    echo Exiting with failure.
    echo
# example
# REMOTE_AUTOGEN_BINDINGS_REPOSITORY="git@github.com:folecr/cocos2dx-autogen-bindings.git"
# REMOTE_AUTOGEN_BINDINGS_REPOSITORY="$HOME/test/cocos2dx-autogen-bindings"
    exit 1
fi

if [ -z "${COMMITTAG+aaa}" ]; then
# ... if COMMITTAG is not set, use this machine's hostname
    COMMITTAG=`hostname -s`
fi
echo Using "'$COMMITTAG'" in the commit messages

ELAPSEDSECS=`date +%s`
echo Using "$ELAPSEDSECS" in the branch names for pseudo-uniqueness

GENERATED_BRANCH=autogeneratedbindings_"$ELAPSEDSECS"
GENERATED_GITDIR="$COCOS2DX_ROOT"/scripting/javascript/bindings/generated/.git
GENERATED_WORKTREE="$COCOS2DX_ROOT"/scripting/javascript/bindings/generated

# git command shortcut
gitcmd_GEN="git --git-dir=$GENERATED_GITDIR --work-tree=$GENERATED_WORKTREE"

# testing...
${gitcmd_GEN} status

# 2. In JSBindings repo, Check out a branch named "autogeneratedbindings" and commit the auto generated bindings to it
${gitcmd_GEN} add README cocos2dx.cpp cocos2dx.hpp cocos2dxapi.js
${gitcmd_GEN} checkout origin/master -b "$GENERATED_BRANCH"
${gitcmd_GEN} commit -m "$COMMITTAG : autogenerated bindings"

# 3. In JSBindings repo, Push the commit with generated bindings to "master" of the auto generated bindings repository
${gitcmd_GEN} push "$REMOTE_AUTOGEN_BINDINGS_REPOSITORY" "$GENERATED_BRANCH":master

if [ -z "${REMOTE_COCOS2DX_REPOSITORY+aaa}" ]; then
    echo
    echo Environment variable is not set REMOTE_COCOS2DX_REPOSITORY
    echo This script will NOT automatically push changes
    echo unless this variable is set.
    echo
    echo Exiting with success.
    echo
# example
# REMOTE_COCOS2DX_REPOSITORY="git@github.com:cocos2d/cocos2d-x.git"
# REMOTE_COCOS2DX_REPOSITORY="$HOME/test/cocos2d-x"
    exit 0
fi

COCOS_BRANCH=updategeneratedsubmodule_"$ELAPSEDSECS"

pushd "${DIR}"

# 4. In Cocos2D-X repo, Checkout a branch named "updategeneratedsubmodule" Update the submodule reference to point to the commit with generated bindings
cd "${COCOS2DX_ROOT}"
git add scripting/javascript/bindings/generated
git checkout origin/gles20 -b "$COCOS_BRANCH"
git commit -m "$COMMITTAG : updating submodule reference to latest autogenerated bindings"

# 5. In Cocos2D-X repo, Push the commit with updated submodule to "gles20" of the cocos2d-x repository
git push "$REMOTE_COCOS2DX_REPOSITORY" "$COCOS_BRANCH":gles20

popd