# Multi-stage build to reduce final image size
FROM python:3.11-slim as builder

# Set working directory
WORKDIR /app

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

# Copy requirements file
COPY requirements.txt .

# Install Python dependencies to a specific directory
RUN pip install --no-cache-dir --prefix=/install -r requirements.txt

# Final stage - minimal runtime image
FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Install only runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    postgresql-client \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Copy installed packages from builder
COPY --from=builder /install /usr/local

# Copy only necessary application code (exclude test files, pycache, etc.)
COPY *.py .
COPY requirements.txt .

# Expose port 8000
EXPOSE 8000

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

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