Dockerfile

# Use Ubuntu 20.04 as base image
FROM ubuntu:20.04

# Set environment variables to avoid interactive prompts during installation
ENV DEBIAN_FRONTEND=noninteractive
ENV TZ=UTC

# Update package lists and install essential build tools
RUN apt-get update && apt-get install -y \
    # Essential build tools
    build-essential \
    git \
    wget \
    curl \
    pkg-config \
    software-properties-common \
    lsb-release \
    unzip \
    libtool \
    autoconf \
    # Dependencies for building CMake
    libssl-dev

# Install CMake 3.21.1 (removing default cmake first if it exists)
RUN apt purge --auto-remove -y cmake && \
    wget https://cmake.org/files/v3.21/cmake-3.21.1.tar.gz && \
    tar -xzvf cmake-3.21.1.tar.gz && \
    cd cmake-3.21.1 && \
    ./bootstrap && \ 
    make -j$(nproc) && \
    make install

# C/C++ compilers and tools
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    gdb \
    make \
    ninja-build

# OpenMP support (usually included with gcc, but ensure libomp-dev is available)
RUN apt-get update && apt-get install -y \
    libomp-dev \
    libomp5

# PCL dependencies
RUN apt-get update && apt-get install -y \    
    libpcl-dev \
    #libpcl-tools \
    # Additional libraries that PCL depends on
    libeigen3-dev \
    libflann-dev \
    libvtk7-dev \
    libqhull-dev \
    libusb-1.0-0-dev \
    libgtest-dev \
    # Boost libraries
    libboost-all-dev 

# OpenCV (comprehensive installation)
RUN apt-get update && apt-get install -y \
    libopencv-dev \
    libopencv-contrib-dev \
    # OpenCV dependencies
    libgtk-3-dev \
    libavcodec-dev \
    libavformat-dev \
    libswscale-dev \
    libv4l-dev \
    libxvidcore-dev \
    libx264-dev \
    libjpeg-dev \
    libpng-dev \
    libtiff-dev \
    libatlas-base-dev \
    python3-dev \
    python3-numpy

# Python libraries installation
RUN apt-get update && apt-get install -y \
    python3-pip \
    python3-numpy \
    python3-matplotlib \
    python3-opencv\
    python3-scipy \
    python3-pandas \
    ca-certificates \
    && python3 -m pip install --upgrade pip setuptools wheel

# FFTW3 (Fast Fourier Transform library)
RUN apt-get update && apt-get install -y \
    libfftw3-dev \
    libfftw3-doc

# CGAL (Computational Geometry Algorithms Library)
RUN apt-get update && apt-get install -y \
    libcgal-dev \
    libcgal-qt5-dev \
    # CGAL dependencies
    libgmp-dev \
    libmpfr-dev \
    # Qt5 for CGAL GUI components (optional)
    qtbase5-dev \
    libqt5opengl5-dev

# Copy requirements file and install all Python packages
COPY requirements.txt /tmp/requirements.txt
RUN echo "=== Installing Python packages from requirements.txt ===" && \
    python3 -m pip install --timeout=120 --retries=5 --trusted-host pypi.org --trusted-host pypi.python.org --trusted-host files.pythonhosted.org -r /tmp/requirements.txt && \
    echo "=== Checking installed packages ===" && \
    python3 -m pip list && \
    echo "=== Checking Python paths ===" && \
    python3 -c "import sys; print('\n'.join(sys.path))" && \
    echo "=== Testing imports immediately after installation ===" && \
    rm /tmp/requirements.txt

# Additional useful tools
RUN apt-get update && apt-get install -y \
    vim \
    nano \
    htop \
    tree \
    valgrind \
    sudo \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user 'tester' to avoid root permissions on created files
# Use build args to match host user UID/GID
ARG USER_ID=1000
ARG GROUP_ID=1000

RUN groupadd -r tester -g ${GROUP_ID} && \
    useradd -r -g tester -u ${USER_ID} -m -d /home/tester -s /bin/bash tester && \
    echo "tester ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers && \
    chown -R tester:tester /home/tester

# Create workspace and set proper permissions
RUN mkdir -p /workspace && \
    chown -R tester:tester /workspace

# Verify installations BEFORE copying and compiling source code
RUN echo "=== Verifying library installations ===" && \
    (cmake --version | head -1 && echo "✓ CMake 3.21.1 installed") || echo "✗ CMake NOT properly installed" && \
    (pkg-config --modversion pcl_common-1.10 && echo "✓ PCL installed") || echo "✗ PCL NOT properly installed" && \
    (pkg-config --modversion opencv4 || pkg-config --modversion opencv) && echo "✓ OpenCV installed" || echo "✗ OpenCV NOT properly installed" && \
    (pkg-config --modversion fftw3 && echo "✓ FFTW3 installed") || echo "✗ FFTW3 NOT properly installed" && \
    (gcc -fopenmp --version >/dev/null 2>&1 && echo "✓ OpenMP support available") || echo "✗ OpenMP NOT available" && \
    (find /usr -name "CGAL" -type d 2>/dev/null | head -1 >/dev/null && echo "✓ CGAL installed") || echo "✗ CGAL NOT properly installed" && \
    (python3 --version && echo "✓ Python3 installed") || echo "✗ Python3 NOT installed" && \
    (python3 -c "import numpy, cv2, matplotlib, scipy, pandas; print('✓ Python libraries installed')" 2>/dev/null) || echo "✗ Python libraries NOT properly installed" && \
    echo "=== Final FastAPI verification ===" && \
    echo "Current PYTHONPATH: $PYTHONPATH" && \
    python3 -c "import sys; print('Python executable:', sys.executable)" && \
    python3 -c "import sys; print('Python version:', sys.version)" && \
    python3 -m pip show fastapi && \
    python3 -m pip show uvicorn && \
    (python3 -c "import fastapi" && echo "✓ FastAPI imported successfully") || echo "✗ FastAPI import failed" && \
    (python3 -c "import uvicorn" && echo "✓ Uvicorn imported successfully") || echo "✗ Uvicorn import failed"

# Copy source code from host src/ directory to container
COPY --chown=tester:tester ./src /workspace/src

# Switch to tester user for compilation
USER tester

# Set working directory BEFORE compilation
WORKDIR /workspace

# Create build directory and compile C++ code
RUN cd src && \
    mkdir -p build && \
    cd build && \
    echo "=== Starting CMake configuration ===" && \
    cmake .. && \
    echo "=== Starting compilation ===" && \
    make -j$(nproc) && \
    echo "=== Compilation completed ===" && \
    echo "Built executables:" && \
    find . -type f -executable -exec ls -la {} \; && \
    echo "=== Build directory contents ===" && \
    ls -la /workspace/src/build/ && \
    echo "=== Creating symbolic links for easy access ===" && \
    ln -sf /workspace/src/build/fourier_soft2D /workspace/fourier_soft2D && \
    ln -sf /workspace/src/tools/scripts/imageStitching.py /workspace/imageStitching.py && \
    ln -sf /workspace/src/tools/scripts/plotRegistrationSolution.py /workspace/plotRegistrationSolution.py && \
    echo "=== Symbolic links created ===" && \
    ls -la /workspace/ | grep -E "(fourier_soft2D|imageStitching|plotRegistrationSolution)"

RUN mkdir -p /workspace/input && \
    mkdir -p /workspace/output && \
    echo "=== Created input and output directories ==="

# Verify build directory exists in final image
RUN echo "=== Final verification - build directory and symbolic links ===" && \
    ls -la /workspace/src/build/ 2>/dev/null || echo "Build directory missing!"

# Add health check to verify FastAPI is running -- This is not necessary if docker compose is used
# HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
#     CMD curl -f http://localhost:8080/health || exit 1

# Set default command to start FastAPI application
CMD cd /workspace/src/ws-api && uvicorn app.main:app --reload --host 0.0.0.0 --port 8080


# Labels for documentation
LABEL maintainer="Arturo Gomez-Chavez <agomezchav@constructor.university>"
LABEL description="Ubuntu 20.04 with C++/Pyhton tools for FSOFT Registration"
LABEL version="1.0"