#!/bin/bash

# https://stackoverflow.com/a/246128
SOURCE="${0}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
  SOURCE="$(readlink "$SOURCE")"
  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"

# Checking Android SDK
if [ -z "$ANDROID_HOME" -a "$ANDROID_HOME" == "" ]; then
        echo -e "\033[31mFailed! ANDROID_HOME is empty. Run 'export ANDROID_HOME=[PATH_TO_SDK]'\033[0m"
        exit
fi

# Checking Android NDK
if [ -z "$ANDROID_NDK_HOME" -a "$ANDROID_NDK_HOME" == "" ]; then
	echo -e "\033[31mFailed! ANDROID_NDK_HOME is empty. Run 'export ANDROID_NDK_HOME=[PATH_TO_NDK]'\033[0m"
	exit 1
fi

_NDK_OPTS="-j `nproc` NDK_MODULE_PATH=$DIR"

_help()
{
	echo "Syntax: $(basename "$SOURCE") [-m|d|s|h|v]"
	echo "Options:"
	echo "b     Build binary."
	echo "c     Clean before binary build."
	echo "d     Debug build."
	echo "s     Strip binaries."
	echo "x     Skip libraries rebuild."
	echo "v     Verbose NDK output."
	echo "h     Print this Help."
	echo
}

_failed()
{
	echo "Compilation failed";
	exit 1;
}

while getopts ":dbcsvxh" option; do
	case $option in
		d) # debug build
			_NDK_OPTS="$_NDK_OPTS NDK_DEBUG=1"
			;;
		b) # build binary
			_BINARY=1
			;;
		c) # clean before build
			_CLEAN=1
			;;
		s) # strip binaries
			_STRIP=1
			;;
		x) # skip libraries rebuild
			_SKIP_LIBS=1
			;;
		v) # verbose output
			_NDK_OPTS="$_NDK_OPTS V=1 NDK_LOG=1"
			;;
		h) # display help
			_help
			exit;;
		\?) # Invalid option
			echo "Error: Invalid option. Use $(basename "$SOURCE") -h for help"
			exit;;
	esac
done

# Building
if [ -z "$_SKIP_LIBS" ]; then
	echo "Building boost..."
	./build_boost.sh
	[ $? -ne 0 ] && _failed

	echo "Building openssl..."
	./build_openssl.sh
	[ $? -ne 0 ] && _failed

	echo "Building miniupnpc..."
	./build_miniupnpc.sh
	[ $? -ne 0 ] && _failed
fi

if [ ! -z "$_CLEAN" ]; then
	echo "Cleaning..."
	$ANDROID_NDK_HOME/ndk-build $_NDK_OPTS clean
fi

if [ ! -z "$_BINARY" ]; then
	echo "Building i2pd..."
	$ANDROID_NDK_HOME/ndk-build $_NDK_OPTS
fi

if [[ ! -z "$_STRIP" || ! -z "$_MODULE" ]]; then
	echo "Processing binaries..."
	pushd $DIR/../libs > /dev/null
	for xarch in $(ls .); do
		if [ ! -z "$_STRIP" ]; then
			$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip -s $xarch/i2pd
		fi
		if [ ! -z "$_MODULE" ]; then
			mv $xarch/i2pd $xarch/libi2pd.so
		fi
	done
	popd > /dev/null
fi

echo "Compilation finished"