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:: ================================================================================================
:: Android libwebm Library Build Script
:: ================================================================================================
:: Purpose: Build libwebm library for Android ARM64 platform
:: Target:  lib/android-arm64-v8a/libwebm/
:: Author:  Generated with Claude Code
::
:: Prerequisites:
::   1. Android NDK r25+ installed
::   2. CMake installed and in PATH
::   3. libwebm source code available in oss/libwebm
::
:: Usage:
::   1. Set Android NDK environment variable:
::      set ANDROID_NDK_HOME=C:\Android\android-ndk-r25c
::   2. libwebm source should be available at:
::      oss/libwebm/
::   3. Run this script:
::      build_libwebm_android.bat        (for ARM64)
::      build_libwebm_android.bat arm32  (for ARM32)
::
:: Output:
::   - lib/android-arm64-v8a/libwebm/libwebm.a (ARM64)
::   - lib/android-armeabi-v7a/libwebm/libwebm.a (ARM32)
::   - include/libwebm/*.h
:: ================================================================================================

echo.
echo ========================================
echo  Android libwebm Library Build Script
echo ========================================
echo.

:: Set project root directory
set "PROJECT_ROOT=%~dp0"
set "PROJECT_ROOT=%PROJECT_ROOT:~0,-1%"

:: Set Android build configuration (default to ARM64, can be overridden)
if "%1"=="arm32" (
    set "ANDROID_ABI=armeabi-v7a"
    set "ANDROID_TOOLCHAIN_PREFIX=armv7a-linux-androideabi"
    set "CMAKE_ANDROID_ARCH_ABI=armeabi-v7a"
) else (
    set "ANDROID_ABI=arm64-v8a"
    set "ANDROID_TOOLCHAIN_PREFIX=aarch64-linux-android"
    set "CMAKE_ANDROID_ARCH_ABI=arm64-v8a"
)
set "ANDROID_PLATFORM=android-29"
set "ANDROID_API_LEVEL=29"

:: Set output directory
set "OUTPUT_DIR=%PROJECT_ROOT%\lib\android-%ANDROID_ABI%\libwebm"

:: libwebm source directory
set "LIBWEBM_SOURCE_DIR=%PROJECT_ROOT%\oss\libwebm"
set "BUILD_DIR=%PROJECT_ROOT%\build-android\libwebm"

echo Project Root: %PROJECT_ROOT%
echo libwebm Source: %LIBWEBM_SOURCE_DIR%
echo Build Directory: %BUILD_DIR%
echo Output Directory: %OUTPUT_DIR%
echo Android ABI: %ANDROID_ABI%
echo Android API Level: %ANDROID_API_LEVEL%
echo.

:: Check if Android NDK is set
if "%ANDROID_NDK_HOME%"=="" (
    if "%ANDROID_NDK_ROOT%"=="" (
        echo ❌ Error: Android NDK not found
        echo Please set ANDROID_NDK_HOME or ANDROID_NDK_ROOT environment variable
        echo Example: set ANDROID_NDK_HOME=C:\Android\android-ndk-r25c
        exit /b 1
    ) else (
        set "ANDROID_NDK_HOME=%ANDROID_NDK_ROOT%"
    )
)

echo ✅ Android NDK found: %ANDROID_NDK_HOME%

:: Check if libwebm source directory exists
if not exist "%LIBWEBM_SOURCE_DIR%" (
    echo ❌ Error: libwebm source directory not found: %LIBWEBM_SOURCE_DIR%
    echo Please ensure libwebm source is available at:
    echo   %PROJECT_ROOT%\oss\libwebm\
    exit /b 1
)

echo ✅ libwebm source found: %LIBWEBM_SOURCE_DIR%

:: Check for required tools
where cmake >nul 2>&1
if errorlevel 1 (
    echo ❌ Error: cmake not found in PATH
    echo Please install CMake and add it to your PATH
    exit /b 1
)

echo ✅ Build tools found: cmake

:: Create build directory
if exist "%BUILD_DIR%" (
    echo 🧹 Cleaning existing build directory...
    rmdir /s /q "%BUILD_DIR%"
)

mkdir "%BUILD_DIR%"
if errorlevel 1 (
    echo ❌ Error: Failed to create build directory
    exit /b 1
)

:: Create output directory
if not exist "%OUTPUT_DIR%" (
    mkdir "%OUTPUT_DIR%"
    if errorlevel 1 (
        echo ❌ Error: Failed to create output directory
        exit /b 1
    )
)

:: Set Android toolchain path
set "ANDROID_TOOLCHAIN_FILE=%ANDROID_NDK_HOME%\build\cmake\android.toolchain.cmake"

echo.
echo 🔧 Configuring libwebm build with CMake...
echo.

:: Change to build directory
pushd "%BUILD_DIR%"

:: Configure CMake for Android cross-compilation (static library for embedding)
cmake "%LIBWEBM_SOURCE_DIR%" ^
    -DCMAKE_TOOLCHAIN_FILE="%ANDROID_TOOLCHAIN_FILE%" ^
    -DANDROID_ABI=%CMAKE_ANDROID_ARCH_ABI% ^
    -DANDROID_PLATFORM=%ANDROID_PLATFORM% ^
    -DANDROID_NDK="%ANDROID_NDK_HOME%" ^
    -DCMAKE_BUILD_TYPE=Release ^
    -DCMAKE_ANDROID_STL_TYPE=c++_shared ^
    -DBUILD_SHARED_LIBS=OFF ^
    -DCMAKE_POSITION_INDEPENDENT_CODE=ON ^
    -DENABLE_WEBM_PARSER=ON ^
    -DENABLE_WEBMTS=OFF ^
    -DENABLE_WEBMINFO=OFF ^
    -DENABLE_TESTS=OFF ^
    -DENABLE_IWYU=OFF ^
    -DENABLE_SAMPLES=OFF ^
    -G "Ninja"

if errorlevel 1 (
    echo ❌ Error: CMake configuration failed
    popd
    exit /b 1
)

echo.
echo 🔨 Building libwebm library...
echo.

:: Build with cmake
cmake --build . --config Release -j %NUMBER_OF_PROCESSORS%

if errorlevel 1 (
    echo ❌ Error: Build failed
    popd
    exit /b 1
)

popd

echo.
echo 📦 Installing libwebm to output directory...
echo.

:: Copy built library
if exist "%BUILD_DIR%\libwebm.a" (
    copy "%BUILD_DIR%\libwebm.a" "%OUTPUT_DIR%\"
    if errorlevel 1 (
        echo ❌ Error: Failed to copy libwebm.a
        exit /b 1
    )
    echo ✅ Copied: libwebm.a
) else (
    echo ❌ Error: libwebm.a not found in build directory
    dir "%BUILD_DIR%"
    exit /b 1
)

:: Copy headers
set "HEADER_OUTPUT_DIR=%PROJECT_ROOT%\include\libwebm"
if not exist "%HEADER_OUTPUT_DIR%" (
    mkdir "%HEADER_OUTPUT_DIR%"
)

:: Copy public headers from libwebm source
echo ✅ Copying libwebm headers...

:: Copy main headers
if exist "%LIBWEBM_SOURCE_DIR%\mkvmuxer.hpp" (
    copy "%LIBWEBM_SOURCE_DIR%\mkvmuxer.hpp" "%HEADER_OUTPUT_DIR%\"
)
if exist "%LIBWEBM_SOURCE_DIR%\mkvmuxertypes.hpp" (
    copy "%LIBWEBM_SOURCE_DIR%\mkvmuxertypes.hpp" "%HEADER_OUTPUT_DIR%\"
)
if exist "%LIBWEBM_SOURCE_DIR%\mkvmuxerutil.hpp" (
    copy "%LIBWEBM_SOURCE_DIR%\mkvmuxerutil.hpp" "%HEADER_OUTPUT_DIR%\"
)
if exist "%LIBWEBM_SOURCE_DIR%\mkvparser.hpp" (
    copy "%LIBWEBM_SOURCE_DIR%\mkvparser.hpp" "%HEADER_OUTPUT_DIR%\"
)
if exist "%LIBWEBM_SOURCE_DIR%\mkvreader.hpp" (
    copy "%LIBWEBM_SOURCE_DIR%\mkvreader.hpp" "%HEADER_OUTPUT_DIR%\"
)
if exist "%LIBWEBM_SOURCE_DIR%\mkvwriter.hpp" (
    copy "%LIBWEBM_SOURCE_DIR%\mkvwriter.hpp" "%HEADER_OUTPUT_DIR%\"
)
if exist "%LIBWEBM_SOURCE_DIR%\webmids.hpp" (
    copy "%LIBWEBM_SOURCE_DIR%\webmids.hpp" "%HEADER_OUTPUT_DIR%\"
)
if exist "%LIBWEBM_SOURCE_DIR%\hdr_util.hpp" (
    copy "%LIBWEBM_SOURCE_DIR%\hdr_util.hpp" "%HEADER_OUTPUT_DIR%\"
)

:: Copy mkvmuxer headers
if exist "%LIBWEBM_SOURCE_DIR%\mkvmuxer\*.h" (
    if not exist "%HEADER_OUTPUT_DIR%\mkvmuxer" mkdir "%HEADER_OUTPUT_DIR%\mkvmuxer"
    copy "%LIBWEBM_SOURCE_DIR%\mkvmuxer\*.h" "%HEADER_OUTPUT_DIR%\mkvmuxer\"
)

:: Copy mkvparser headers
if exist "%LIBWEBM_SOURCE_DIR%\mkvparser\*.h" (
    if not exist "%HEADER_OUTPUT_DIR%\mkvparser" mkdir "%HEADER_OUTPUT_DIR%\mkvparser"
    copy "%LIBWEBM_SOURCE_DIR%\mkvparser\*.h" "%HEADER_OUTPUT_DIR%\mkvparser\"
)

:: Copy common headers
if exist "%LIBWEBM_SOURCE_DIR%\common\*.h" (
    if not exist "%HEADER_OUTPUT_DIR%\common" mkdir "%HEADER_OUTPUT_DIR%\common"
    copy "%LIBWEBM_SOURCE_DIR%\common\*.h" "%HEADER_OUTPUT_DIR%\common\"
)

:: Copy webvtt headers
if exist "%LIBWEBM_SOURCE_DIR%\webvtt\*.h" (
    if not exist "%HEADER_OUTPUT_DIR%\webvtt" mkdir "%HEADER_OUTPUT_DIR%\webvtt"
    copy "%LIBWEBM_SOURCE_DIR%\webvtt\*.h" "%HEADER_OUTPUT_DIR%\webvtt\"
)

echo ✅ Copied: libwebm headers to include/libwebm/

:: Display build summary
echo.
echo ========================================
echo  Build Summary
echo ========================================
echo Library: %OUTPUT_DIR%\libwebm.a
echo Headers: %HEADER_OUTPUT_DIR%\*.h
echo Platform: Android %ANDROID_ABI% (API %ANDROID_API_LEVEL%)
echo Build Type: Release
echo.

:: Verify output files
if exist "%OUTPUT_DIR%\libwebm.a" (
    echo ✅ Success: Android libwebm library built successfully

    :: Display file size
    for %%F in ("%OUTPUT_DIR%\libwebm.a") do (
        echo Library Size: %%~zF bytes
    )
) else (
    echo ❌ Error: Build completed but libwebm.a not found in output directory
    exit /b 1
)

echo.
echo 🎯 Next Steps:
echo   1. The Android libwebm library is ready for use in VavCore
echo   2. Build VavCore Android library: platforms\android\vavcore\build.sh
echo   3. Test the library with Android VavCore integration
echo.

endlocal
exit /b 0