# Multi-stage build for Python FastAPI backend
FROM python:3.11-slim as builder

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    postgresql-client \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements and install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt

# Final stage
FROM python:3.11-slim

WORKDIR /app

# Install runtime dependencies
RUN apt-get update && apt-get install -y \
    postgresql-client \
    && rm -rf /var/lib/apt/lists/*

# Copy Python dependencies from builder
COPY --from=builder /root/.local /root/.local

# Copy application code
COPY . .

# Make sure scripts in .local are usable
ENV PATH=/root/.local/bin:$PATH

# Create imports directory
RUN mkdir -p /app/imports

# Expose port
EXPOSE 8000

# Run migrations and start server
CMD alembic upgrade head && uvicorn app.main:app --host 0.0.0.0 --port 8000