# Use an official Python runtime as a parent image
FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    DEBIAN_FRONTEND=noninteractive

# Set the working directory
WORKDIR /app

# Install system dependencies for OpenCV, PyTesseract, and PDF processing
RUN apt-get update && apt-get install -y \
    build-essential \
    ffmpeg \
    libsm6 \
    libxext6 \
    poppler-utils \
    tesseract-ocr \
    libgl1 \
    && rm -rf /var/lib/apt/lists/*

# Create a non-root user required by Hugging Face Spaces
RUN useradd -m -u 1000 user

# Set the working directory
WORKDIR /app

# Ensure /app is owned by the user so we don't get PermissionError on startup
RUN chown -R user:user /app

USER user
ENV PATH="/home/user/.local/bin:$PATH"

# Copy requirements first to leverage Docker cache
COPY --chown=user requirements.txt .

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

# Copy the rest of the application code
COPY --chown=user . .

# Expose the port Hugging Face Spaces expects
EXPOSE 7860

# Command to run the application
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]