# Build stage
FROM python:3.9-slim AS builder

WORKDIR /app

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

# Copy requirements file
COPY requirements.txt .

# Install dependencies into a virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Final stage
FROM python:3.9-slim

WORKDIR /app

# Copy only the necessary files from the builder stage
COPY --from=builder /opt/venv /opt/venv

# Make sure we use the virtual environment
ENV PATH="/opt/venv/bin:$PATH"
ENV PYTHONUNBUFFERED=1

# Copy only the application code needed to run the service
COPY src/ ./src/
COPY main.py .

# Expose the port the app runs on
EXPOSE 8000

# Command to run the application
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]