# Use a lightweight Python base image
FROM python:3.10-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PORT=7860

# Set working directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    git \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements file
COPY requirements.txt .

# Install Python dependencies
# Note: We install torch CPU version to keep image size smaller if GPU is not used,
# but Cloud Run is CPU-only by default anyway.
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# Expose the port
EXPOSE 7860

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