# ── Stage 1: dependency install ────────────────────────────────────────────────
FROM python:3.11-slim AS deps

WORKDIR /app

# System packages needed at build time only (git for any VCS deps, curl for health check)
RUN apt-get update && \
    apt-get install -y --no-install-recommends git curl && \
    rm -rf /var/lib/apt/lists/*

# Copy dependency manifests first so Docker can cache this layer
# and skip re-installing when only source code changes
COPY requirements.txt .

RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

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

# curl is needed for the HEALTHCHECK
RUN apt-get update && \
    apt-get install -y --no-install-recommends curl && \
    rm -rf /var/lib/apt/lists/*

# Create a non-root user — required by Hugging Face Spaces
RUN useradd -m -u 1000 appuser

WORKDIR /app

# Copy installed packages from the build stage (no venv needed inside Docker)
COPY --from=deps /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
COPY --from=deps /usr/local/bin /usr/local/bin

# Copy the entire my_env package
# Build context must be the my_env/ directory (see README for docker build command)
COPY --chown=appuser:appuser . /app

# PYTHONPATH makes `import my_env` and `import server` both resolve correctly
ENV PYTHONPATH="/app"

# HF Spaces requires port 7860. Internal uvicorn also binds 7860.
EXPOSE 7860

# Health check — HF Spaces polls /health to decide if the container is ready
HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=5 \
    CMD curl -f http://localhost:7860/health || exit 1

USER appuser

# Run from /app/my_env so relative imports (server.app:app) resolve correctly
WORKDIR /app

ENV ENABLE_WEB_INTERFACE=true
CMD ["uvicorn", "server.app:app", \
    "--host", "0.0.0.0", \
    "--port", "7860", \
    "--workers", "1", \
    "--log-level", "info"]