# Use an official Python runtime as a parent image
FROM python:3.10-slim

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

# Set the working directory in the container
WORKDIR /app

# Install system dependencies (needed for some python packages like numpy/scikit-learn)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy the requirements file into the container
COPY requirements.txt .

# Install any needed packages specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the backend code
COPY . .

# Create the data directory for SQLite if it doesn't exist
RUN mkdir -p /app/data

# Expose the port the app runs on
EXPOSE 7860

# Run the application
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--timeout", "120", "--workers", "1", "app:app"]