# 1. Base Image Declaration (Corrected 'slim' tag)
FROM python:3.11-slim

# 2. Environment Variables & Cleanup
# Suppress Matplotlib cache permission warning
ENV MPLCONFIGDIR /tmp/.matplotlib

# Explicitly force CPU and suppress CUDA warnings (if not using a GPU space)
ENV CUDA_VISIBLE_DEVICES=""

# Ensure Python output is immediately available in logs
ENV PYTHONUNBUFFERED True

# Set the port required by Hugging Face Spaces/Uvicorn
ENV PORT 7860

# 3. System Dependencies (Required by OpenCV/cv2)
RUN apt-get update && \
    apt-get install -y libgl1 libglib2.0-0 libsm6 libxext6 && \
    rm -rf /var/lib/apt/lists/*

# 4. Working Directory
WORKDIR /app

# 5. Dependency Installation (Leverages Docker caching)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# 6. Application Code
COPY . .

# 7. Port Documentation (EXPOSE is optional but good practice)
EXPOSE 7860

# 8. Define the command to start the Uvicorn server
# This runs the 'app' object in the 'app.py' module, listening on port 7860.
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]