# ─── Stage 1: Builder ────────────────────────────────────────────────────────
FROM python:3.11-slim AS builder

WORKDIR /build

# System deps for psycopg2 and cryptography
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt .
RUN pip install --no-cache-dir --prefix=/install -r requirements.txt

# ─── Stage 2: Runtime ────────────────────────────────────────────────────────
FROM python:3.11-slim AS runtime

WORKDIR /app

# Runtime system deps only
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    curl \
    && rm -rf /var/lib/apt/lists/*

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

# Copy application code (exclude venv, __pycache__, .env)
COPY app/ ./app/
COPY requirements.txt .

# Non-root user for security
RUN useradd -m -u 1001 bankbot && chown -R bankbot:bankbot /app
USER bankbot

EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
    CMD curl -f http://localhost:8000/health || exit 1

# Production: no --reload, multiple workers
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "2", "--proxy-headers", "--forwarded-allow-ips", "*"]