# Multi-stage / Production Dockerfile for AI Document Intelligence OCR on Google Cloud Run
FROM python:3.10-slim

# Prevent Python from writing .pyc files and buffer stdout/stderr
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PORT=8080

WORKDIR /app

# Install system dependencies for OpenCV, Pillow, PaddleOCR, and ONNX
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    curl \
    libgl1 \
    libglib2.0-0 \
    libgomp1 \
    libgstreamer1.0-0 \
    && rm -rf /var/lib/apt/lists/*

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

# Copy application source code
COPY src/ ./src/
COPY app.py .
COPY frontend.py .

# Health check probe
HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
    CMD curl -f http://localhost:${PORT}/health || exit 1

# Expose container port
EXPOSE 8080

# Run FastAPI with uvicorn listening on $PORT (Google Cloud Run dynamically injects PORT)
CMD ["sh", "-c", "uvicorn app:app --host 0.0.0.0 --port ${PORT:-8080} --workers 1"]