# Stage 1: Build
FROM python:3.11 AS builder

WORKDIR /app

# Copy only dependency files first for better caching
COPY requirements.txt /app/
RUN pip install --no-cache-dir --upgrade pip && pip install --no-cache-dir -r requirements.txt

# Stage 2: Final image
FROM python:3.11-slim

WORKDIR /app

# Copy installed dependencies from builder stage
COPY --from=builder /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

# Copy application files
COPY ./app /app

# Set environment variables
ENV PYTHONUNBUFFERED=1

# Expose API port
EXPOSE 8000

# Default command
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]