#!/usr/bin/bash
#
#  Copyright 2025 Yağız Zengin
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at

#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#

set -e

BUILD_64="build_arm64-v8a"
BUILD_32="build_armeabi-v7a"
THIS="$(basename $0)"

echo() { command echo "[$THIS]: $@"; }

checks()
{
    if [ -z "$ANDROID_NDK" ]; then
        echo "Please set ANDROID_NDK variable as your NDK path."
        exit 1
    fi
    if [ ! -f /usr/bin/cmake ] && [ ! -f /bin/cmake ]; then
        echo "Please verify your CMake installation."
        exit 1
    fi
}

clean()
{
    echo "Cleaning workspace."
    rm -rf $BUILD_32 $BUILD_64 \
        include/generated \
        srclib/libhelper/tests/dir \
        srclib/libhelper/tests/linkdir \
        srclib/libhelper/tests/file.txt
}

build()
{
    mkdir -p $BUILD_64 $BUILD_32
    command echo -e "BUILD INFO:
    ARCHS: arm64-v8a armeabi-v7a
    ANDROID_PLATFORM: $ANDROID_PLATFORM
    ANDROID_TOOLCHAIN_FILE: $ANDROID_NDK/build/cmake/android.toolchain.cmake\n"

    echo "Configuring for arm64-v8a..."
    cmake -B $BUILD_64 -S . $1 \
        -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK/build/cmake/android.toolchain.cmake \
        -DANDROID_ABI=arm64-v8a \
        -DANDROID_PLATFORM=$ANDROID_PLATFORM \
        -DANDROID_STL=c++_static

    echo "Configuring for armeabi-v7a..."
    cmake -B $BUILD_32 -S . $1 \
        -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK/build/cmake/android.toolchain.cmake \
        -DANDROID_ABI=armeabi-v7a \
        -DANDROID_PLATFORM=$ANDROID_PLATFORM \
        -DANDROID_STL=c++_static

    echo "Building arm64-v8a artifacts..."
    cmake --build $BUILD_64
    echo "arm64-v8a build complete, artifacts: $PWD/$BUILD_64"

    echo "Building armeabi-v7a artifacts..."
    cmake --build $BUILD_32
    echo "armeabi-v7a build complete, artifacts: $PWD/$BUILD_32"
}

if [ $# -eq 0 ]; then
    command echo "Usage: $0 build|rebuild|clean [EXTRA_CMAKE_FLAGS] [ANDROID_PLATFORM=SELECTED_ANDROID_PLATFORM]"
    exit 1
fi

if [ -z $ANDROID_PLATFORM ]; then ANDROID_PLATFORM="android-21"; fi

checks

case $1 in
    "build")   build $2;;
    "clean")   clean ;;
    "rebuild") clean; build $2;;
    *)
        command echo "$0: Unknown argument: $1"
        exit 1 ;;
esac