FROM python:3.10-slim

# Set working directory
WORKDIR /app

# Install system dependencies including security tools
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    g++ \
    make \
    git \
    curl \
    libseccomp2 \
    pkg-config \
    libffi-dev \
    libssl-dev \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/* \
    && rm -rf /tmp/* /var/tmp/*

# Create a non-root user with restricted shell
RUN groupadd -r -g 1000 botuser && \
    useradd -r -m -u 1000 -g botuser -s /usr/sbin/nologin botuser && \
    mkdir -p /app/bots /app/data /app/templates /app/cache /app/logs /app/uploads /app/cache/pip && \
    chmod 755 /app

# Copy requirements first for better caching
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Clean up pip cache
RUN rm -rf /root/.cache/pip

# Copy application code
COPY . .

# Set ownership after all files are copied
RUN chown -R botuser:botuser /app && \
    chmod -R 755 /app

# Set secure environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PYTHONHASHSEED=random \
    GRADIO_SERVER_NAME="0.0.0.0" \
    GRADIO_SERVER_PORT=7860 \
    UVICORN_HOST="0.0.0.0" \
    UVICORN_PORT=8000 \
    HF_HOME=/app/data/huggingface \
    BOTS_DIR=/app/bots \
    PIP_CACHE_DIR=/app/cache/pip \
    MAX_MEMORY_MB=512 \
    MAX_CPU_TIME=30

# Switch to non-root user
USER botuser

# Create user directories with proper permissions
RUN mkdir -p /app/bots /app/data /app/templates /app/cache/pip /app/logs /app/uploads

# Expose ports
EXPOSE 7860 8000

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

# Run the application
CMD ["python", "app.py"]