FROM ubuntu:24.04

# Install required tools for MinGW cross-compilation, CMake, and dependencies
RUN apt-get update && apt-get install -y \
    git \
    make \
    curl \
    wget \
    unzip \
    cmake \
    build-essential \
    mingw-w64 \
    g++-mingw-w64-x86-64-posix \
    gcc-mingw-w64-x86-64-posix \
    pkg-config \
    && rm -rf /var/lib/apt/lists/*

# Download and install Go 1.25.4
RUN wget https://go.dev/dl/go1.25.4.linux-amd64.tar.gz && \
    tar -C /usr/local -xzf go1.25.4.linux-amd64.tar.gz && \
    rm go1.25.4.linux-amd64.tar.gz
ENV PATH=$PATH:/usr/local/go/bin

# Download OpenCV 4.12.0 source
RUN wget https://github.com/opencv/opencv/archive/4.12.0.zip && \
    unzip 4.12.0.zip && \
    mv opencv-4.12.0 opencv && \
    rm 4.12.0.zip

# Create MinGW toolchain file for CMake
RUN echo 'set(CMAKE_SYSTEM_NAME Windows)' > /opencv/toolchain.cmake && \
    echo 'set(CMAKE_SYSTEM_PROCESSOR AMD64)' >> /opencv/toolchain.cmake && \
    echo 'set(TOOLCHAIN x86_64-w64-mingw32)' >> /opencv/toolchain.cmake && \
    echo 'set(CMAKE_C_COMPILER /usr/bin/${TOOLCHAIN}-gcc-posix)' >> /opencv/toolchain.cmake && \
    echo 'set(CMAKE_CXX_COMPILER /usr/bin/${TOOLCHAIN}-g++-posix)' >> /opencv/toolchain.cmake && \
    echo 'set(CMAKE_RC_COMPILER /usr/bin/${TOOLCHAIN}-windres)' >> /opencv/toolchain.cmake && \
    echo 'set(CMAKE_FIND_ROOT_PATH /usr/${TOOLCHAIN})' >> /opencv/toolchain.cmake && \
    echo 'set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)' >> /opencv/toolchain.cmake && \
    echo 'set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)' >> /opencv/toolchain.cmake && \
    echo 'set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)' >> /opencv/toolchain.cmake

# Build and install OpenCV for Windows (static libs, minimal build to avoid dependency issues)
RUN cd /opencv && mkdir build && cd build && \
    cmake -DCMAKE_TOOLCHAIN_FILE=../toolchain.cmake \
          -DCMAKE_INSTALL_PREFIX=/usr/x86_64-w64-mingw32 \
          -DBUILD_SHARED_LIBS=OFF \
          -DWITH_IPP=OFF \
          -DBUILD_EXAMPLES=OFF \
          -DBUILD_TESTS=OFF \
          -DBUILD_PERF_TESTS=OFF \
          -DBUILD_opencv_apps=OFF \
          -DWITH_FFMPEG=OFF \
          -DWITH_OPENGL=OFF \
          -DWITH_QT=OFF \
          -DWITH_VTK=OFF \
          -DWITH_GTK=OFF \
          -DCPU_BASELINE=SSE3 \
          -DWITH_TBB=OFF \
          -DWITH_PROTOBUF=ON \
          -DBUILD_PROTOBUF=ON \
          -DPROTOBUF_UPDATE_FILES=OFF \
          -DWITH_PNG=ON \
          -DWITH_JPEG=ON \
          -DWITH_TIFF=ON \
          -DWITH_WEBP=ON \
          -DWITH_OPENJPEG=ON \
          -DWITH_OPENEXR=OFF \
          -DBUILD_PNG=ON \
          -DBUILD_JPEG=ON \
          -DBUILD_TIFF=ON \
          -DBUILD_WEBP=ON \
          -DBUILD_OPENJPEG=ON \
          -DBUILD_ZLIB=ON \
          .. && \
    make -j$(nproc) && \
    make install

# List the actual libraries to help debug
RUN echo "Installed OpenCV libraries:" && ls -la /usr/x86_64-w64-mingw32/lib/*.a | head -30

# Set CGO environment variables with corrected library names and paths
ENV CGO_CPPFLAGS="-I/usr/x86_64-w64-mingw32/include/opencv4"
ENV CGO_CXXFLAGS="--std=c++11"
# Include both main lib directory and opencv4/3rdparty subdirectory, use correct library names and Windows system libs
ENV CGO_LDFLAGS="-L/usr/x86_64-w64-mingw32/lib -L/usr/x86_64-w64-mingw32/lib/opencv4/3rdparty -lopencv_core4120 -lopencv_imgproc4120 -lopencv_objdetect4120 -lopencv_flann4120 -lopencv_features2d4120 -lopencv_calib3d4120 -lopencv_highgui4120 -lopencv_videoio4120 -lopencv_imgcodecs4120 -lopencv_video4120 -lopencv_photo4120 -lopencv_ml4120 -lopencv_dnn4120 -lopencv_gapi4120 -lopencv_stitching4120 -llibprotobuf -llibpng -llibopenjp2 -llibwebp -llibtiff -llibjpeg-turbo -lzlib -lade -lgdi32 -lole32 -loleaut32 -luuid -lcomdlg32 -lstdc++fs -lws2_32 -static-libgcc -static-libstdc++ -static"
ENV PKG_CONFIG_PATH=/usr/x86_64-w64-mingw32/lib/pkgconfig
ENV LD_LIBRARY_PATH=/usr/x86_64-w64-mingw32/lib

# Clone the repository
RUN git clone https://git.weirdcat.su/weirdcat/auto-attendance.git /go/src/auto-attendance

# Set working directory
WORKDIR /go/src/auto-attendance

# Download Go modules
RUN go mod download

# Build the Windows executable with CGO enabled, customenv tag, and MinGW compilers
RUN GOOS=windows GOARCH=amd64 CGO_ENABLED=1 \
    CC=x86_64-w64-mingw32-gcc-posix CXX=x86_64-w64-mingw32-g++-posix \
    go build -tags customenv -v -o bin/autoattendance.exe ./cmd/