# Multi-stage Dockerfile for all Python microservices.
# Build args:
#   EXTRAS  — pip optional-dependency groups (e.g. "news", "sentiment,trading")
#   SERVICE_MODULE — Python module name under services/ (e.g. "news_fetcher")

# ---------------------------------------------------------------------------
# Stage 1: builder — install Python dependencies
# ---------------------------------------------------------------------------
FROM python:3.12-slim AS builder

WORKDIR /app

# Copy project metadata and source so pip can resolve the local package
COPY pyproject.toml .
COPY shared/ shared/
COPY services/ services/
COPY backtester/ backtester/
COPY alembic/ alembic/
COPY alembic.ini .

ARG EXTRAS="dev"
RUN pip install --no-cache-dir ".[$EXTRAS]" && pip install --no-cache-dir curl_cffi 2>/dev/null || true

# ---------------------------------------------------------------------------
# Stage 2: slim runtime image
# ---------------------------------------------------------------------------
FROM python:3.12-slim

RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Copy installed packages and CLI entry-points from the builder
COPY --from=builder /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

# Copy application source code
COPY --from=builder /app .

ARG SERVICE_MODULE="api_gateway"
ENV SERVICE_MODULE=${SERVICE_MODULE}
ARG HEALTH_PORT="9090"
ENV HEALTH_PORT=${HEALTH_PORT}

# Check /metrics endpoint (all services expose it via OpenTelemetry)
HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
    CMD curl -sf http://localhost:${HEALTH_PORT}/metrics > /dev/null || exit 1

CMD python -m services.${SERVICE_MODULE}.main