# ---- Stage 1: build deps ----
FROM python:3.10-slim AS base

ENV PYTHONPATH=/app \
    PYTHONUNBUFFERED=1 \
    DEBIAN_FRONTEND=noninteractive \
    PIP_NO_CACHE_DIR=1

WORKDIR /app

# System dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential curl git \
    && rm -rf /var/lib/apt/lists/*

# Install Python dependencies
COPY requirements.txt .
RUN pip install --upgrade pip && \
    pip install -r requirements.txt

# ---- Stage 2: app ----
FROM base AS app

WORKDIR /app
COPY . .

# Create runtime directories
RUN mkdir -p logs data

# Non-root user for HF Spaces security policy
RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app
USER appuser

# Expose FastAPI port (HF Spaces default)
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Start server
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]