# Use Ubuntu as base image for better compatibility
FROM ubuntu:22.04

# Prevent interactive prompts during package installation
ENV DEBIAN_FRONTEND=noninteractive

# Update and install essential packages
RUN apt-get update && apt-get install -y \
    # Python 3.11 and pip
    software-properties-common \
    python3.11 \
    python3.11-dev \
    python3-pip \
    python3.11-venv \
    # C/C++ compilers and tools
    build-essential \
    gcc \
    g++ \
    make \
    # Java 17 (full JDK)
    openjdk-17-jdk \
    # Version control and utilities
    git \
    curl \
    wget \
    vim \
    # Process monitoring
    procps \
    htop \
    # Clean up
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Set Python 3.11 as default python3
RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.11 1 \
    && update-alternatives --set python3 /usr/bin/python3.11

# Set JAVA_HOME
ENV JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
ENV PATH="$JAVA_HOME/bin:$PATH"

# Create app directory
WORKDIR /app

# Create non-root user
RUN useradd -m -u 1000 -s /bin/bash user && \
    chown -R user:user /app

# Give user permissions to create temp directories
RUN mkdir -p /tmp/code_workspace && \
    chown -R user:user /tmp/code_workspace && \
    chmod 755 /tmp/code_workspace

# Switch to non-root user
USER user

# Set user paths
ENV PATH="/home/user/.local/bin:$PATH"
ENV PYTHONPATH="/app:$PYTHONPATH"

# Copy requirements first (for better caching)
COPY --chown=user:user requirements.txt .

# Install Python dependencies
RUN pip3 install --no-cache-dir --upgrade pip && \
    pip3 install --no-cache-dir -r requirements.txt

# Copy application files
COPY --chown=user:user . .

# Verify installations
RUN echo "=== Version Check ===" && \
    python3 --version && \
    pip3 --version && \
    java -version && \
    javac -version && \
    gcc --version && \
    g++ --version

# Expose port
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Start the application
CMD ["python3", "-m", "uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]