# Multi-stage Dockerfile to keep final image small
FROM python:3.10-slim AS builder

# Install build-time packages and Python dependencies in one layer
WORKDIR /app
COPY requirements.txt /app/requirements.txt
RUN apt-get update \
    && apt-get install -y --no-install-recommends build-essential gcc libpq-dev \
    && python -m pip install --upgrade pip \
    && pip install --no-cache-dir --prefix=/install -r /app/requirements.txt \
    && apt-get purge -y --auto-remove build-essential gcc \
    && rm -rf /var/lib/apt/lists/*

FROM python:3.10-slim
WORKDIR /app

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

# Production environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
	PYTHONUNBUFFERED=1 \
	DATABASE_DRIVER=postgresql \
	DATABASE_HOST=localhost \
	DATABASE_PORT=5432 \
	DATABASE_USER=calminer \
	DATABASE_PASSWORD=changeme \
	DATABASE_NAME=calminer \
	DATABASE_SCHEMA=public

# Copy application code
COPY . /app

# Expose service port
EXPOSE 8000

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