# ============================================================
# AuthorBot RAG API — HuggingFace Spaces Dockerfile
# Entry: app.py → app/main.py (FastAPI)
# Routes: /api/chat/{slug} · /api/admin/{slug} · /api/super · /health
# ============================================================
FROM python:3.11-slim AS builder

RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libpq-dev \
    libmagic1 \
    curl \
    git \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

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

# ── Production Stage ──────────────────────────────────────────
FROM python:3.11-slim

RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    libmagic1 \
    curl \
    redis-server \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app
ENV PYTHONPATH=/app
ENV DATABASE_URL=sqlite+aiosqlite:////data/db.sqlite
ENV REDIS_URL=redis://:authorbotredis@localhost:6379/0
ENV CHROMA_CLIENT_MODE=persistent
ENV CHROMA_PERSIST_DIR=/data/chroma
ENV UPLOAD_STORAGE_PATH=/data/uploads

COPY --from=builder /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

# Copy entire flat project (app/, static/, app.py, requirements.txt)
COPY app/ ./app/
COPY static/ ./static/
COPY app.py .

RUN mkdir -p /data/chroma /data/uploads /data/sessions /data/redis && \
    printf 'dir /data/redis\nbind 127.0.0.1\nport 6379\ndaemonize yes\nlogfile /dev/null\nrequirepass authorbotredis\nappendonly yes\nappendfsync everysec\n' > /app/redis-hf.conf

RUN adduser --disabled-password --gecos "" --uid 1000 appuser && \
    chown -R appuser:appuser /app /data
USER appuser

# Pre-warm ML models (non-fatal if network unavailable at build time)
RUN python -c "from sentence_transformers import CrossEncoder; CrossEncoder('cross-encoder/ms-marco-MiniLM-L-6-v2')" || true
RUN python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('sentence-transformers/all-MiniLM-L6-v2')" || true

RUN python -c "from app.main import app; print('App import OK')"

HEALTHCHECK --interval=30s --timeout=10s --start-period=180s --retries=5 \
    CMD curl -f http://localhost:7860/health || exit 1

EXPOSE 7860

CMD ["sh", "-c", "mkdir -p /data/chroma /data/uploads /data/sessions /data/redis && redis-server /app/redis-hf.conf && sleep 1 && uvicorn app.main:app --host 0.0.0.0 --port 7860 --workers 1 --loop uvloop --http httptools"]