# --Compile DLib
#   Adapted from https://github.com/Luca96/dlib-for-android
# -----------------------------------------------------------------------------

# Android-cmake path: REPLACE WITH YOUR CMAKE PATH!
AndroidCmake='/home/user/Android/Sdk/cmake/3.22.1/bin/cmake'

# Android-ndk path: REPLACE WITH YOUR NDK PATH!
NDK="${ANDROID_NDK:/home/user/Android/Sdk/ndk/21.4.7075529}" 

TOOLCHAIN="$NDK/build/cmake/android.toolchain.cmake"


# Supported Android ABI: TAKE ONLY WHAT YOU NEED!
# ABI=('armeabi-v7a' 'arm64-v8a' 'x86' 'x86_64')
ABI=('arm64-v8a')

# path to strip tool: REPLACE WITH YOURS, ACCORDING TO OS!
STRIP_PATH="/home/user/Android/Sdk/ndk/21.4.7075529/toolchains/llvm/prebuilt/linux-x86_64/bin" 

# Declare the array
declare -A STRIP_TOOLS

STRIP_TOOLS=(
    ['armeabi-v7a']=$STRIP_PATH/arm-linux-androideabi-strip
    ['arm64-v8a']=$STRIP_PATH/aarch64-linux-android-strip
    ['x86']=$STRIP_PATH/x86_64-linux-android-strip
    ['x86_64']=$STRIP_PATH/x86_64-linux-android-strip
)

# Minimum supported sdk: SHOULD BE GREATER THAN 16
MIN_SDK=21 #16




# Android project path: REPLACE WITH YOUR PROJECT PATH!
PROJECT_PATH='/home/user/Downloads/AndroidProject' #I have no android project on this virtual machine, I just need a folder where I can copy the generated .so libs 
 
# Directory for storing native libraries
NATIVE_DIR="$PROJECT_PATH/compiled" #same






# -----------------------------------------------------------------------------
# -- Dlib 
# ----------------------------------------------------------------------------- 

# Dlib library path: REPLACE WITH YOUR DLIB PATH! O scarichi il repo di luca ricorsivamente e allora punti alla sottocartella "dlib" del repo, o scarichi dlib a parte e punti a quella cartella!
DLIB_PATH='/home/user/Downloads/dlib-19.21'

function compile_dlib {
	
	
	
	cd $DLIB_PATH
	echo
	echo "*************"
	echo "I'll try to make build folder in '$DLIB_PATH'/build  "
	echo "*************"
	echo
	
	mkdir 'build'

	
	
	
	

	for abi in "${ABI[@]}"
	do
	
		echo			
		echo "*************"
		echo "I'll try to make $abi folder in '$DLIB_PATH'/build/'$abi'    "
		echo "*************"
		echo

		mkdir "build/$abi"
		
		echo			
		echo "*************"
		echo "I'll try to move to the folder where I'll compile " # to '$DLIB_PATH'/build/$abi "
		echo "*************"
		echo
		
		#cd "/home/user/Downloads/dlib-19.21/dlib"
		cd "build/$abi"


		echo
		echo "*************"
		echo "current dir is: $PWD"
		echo "Setting Cmake for ABI: '$abi'... "
		echo "*************"
		echo
		
		$AndroidCmake -DBUILD_SHARED_LIBS=1 \
					  -DANDROID_NDK=$NDK \
					  -DCMAKE_TOOLCHAIN_FILE=$TOOLCHAIN \ 
					  -DCMAKE_BUILD_TYPE=Release \
					  -DCMAKE_CXX_FLAGS="-std=c++11 -frtti -fexceptions" \
					  -DCMAKE_C_FLAGS=-O3 \
					  -DANDROID_ABI=$abi \
					  -DANDROID_PLATFORM="android-$MIN_SDK" \
					  -DANDROID_TOOLCHAIN=clang \
					  -DANDROID_STL=c++_shared \
					  -DANDROID_CPP_FEATURES=rtti exceptions \
					  -DCMAKE_FIND_DEBUG_MODE=ON \
					  -DCMAKE_PREFIX_PATH=../../ \
					  ../../
					   #-DCMAKE_S="/home/user/Down loads/dlib-19.21/dlib"
					  
					  
					  
 		
 		
 		
 		echo
		echo "*************"
		echo "current dir is $PWD "
		echo "Generating the 'dlib/libdlib.so' for ABI: '$abi' "
		echo "*************"
		echo
	
 	  
		$AndroidCmake --build .

		echo
		echo "*************"
		echo "Stripping libdlib.so for '$abi' to reduce lib size using ${STRIP_TOOLS[$abi]}"
		echo "*************"
		echo
		
		
	
		${STRIP_TOOLS[$abi]} --strip-unneeded dlib/libdlib.so

		echo
		echo "*************"
		echo "Compilation Dlib for ABI: '$abi' is Over. "
		echo "*************"
		echo
		
		cd ../../
	done
}





#to copy .so libs into Android Project
function dlib_setup {
	
	echo
	echo "*************"
	echo "Making directories for Dlib "
	echo "*************"
	echo
	
	
	mkdir "$NATIVE_DIR/dlib"
	echo "=> '$NATIVE_DIR/dlib' created."
	mkdir "$NATIVE_DIR/dlib/lib"
	echo "=> '$NATIVE_DIR/dlib/lib' created."
	mkdir "$NATIVE_DIR/dlib/include"
	echo "=> '$NATIVE_DIR/dlib/include' created."
	mkdir "$NATIVE_DIR/dlib/include/dlib"
    echo "=> '$NATIVE_DIR/dlib/include/dlib' created."

	echo "=> Copying Dlib headers..."
	cp -v -r "$DLIB_PATH/dlib" "$NATIVE_DIR/dlib/include/dlib"

	echo "=> Copying 'libdlib.so' for each ABI..."
	for abi in "${ABI[@]}"
	do
		mkdir "$NATIVE_DIR/dlib/lib/$abi"
		cp -v "$DLIB_PATH/build/$abi/dlib/libdlib.so" "$NATIVE_DIR/dlib/lib/$abi"
		echo " > Copied libdlib.so for $abi"
	done
}






# COMMENT TO DISABLE COMPILATION
compile_dlib




# -----------------------------------------------------------------------------
# -- OpenCV
# -----------------------------------------------------------------------------

# OpenCV library path: REPLACE WITH YOUR OPENCV PATH!
OPENCV_PATH='/home/user/Downloads/opencv454/sdk/native'



#to copy openCV .so lib to Androdi Project
function opencv_setup {
	mkdir "$NATIVE_DIR/opencv"

	echo
	echo "*************"
	echo "Copying 'libopencv_java4.so' for each ABI to Android Project"
	echo "*************"
	echo
	
	for abi in "${ABI[@]}"
	do
		mkdir "$NATIVE_DIR/opencv/$abi"
		cp -v "$OPENCV_PATH/libs/$abi/libopencv_java4.so" "$NATIVE_DIR/opencv/$abi"
		echos " > Copied libopencv_java4.so for $abi"
	done
}





# -----------------------------------------------------------------------------
# -- Project setup
# -----------------------------------------------------------------------------

# mkdir $NATIVE_DIR att

# COMMENT TO NOT COPY DLIB '.so' FILES
#dlib_setup

# COMMENT TO NOT COPY OPENCV '.so' FILES
#opencv_setup

echo
echo "=> Project configuration completed."
echo
read -p "Press enter to continue"
echo