FROM python:3.12-slim

WORKDIR /app

# Hugging Face Spaces listens on 7860.
# JSON vector store + local seed embeddings (fast cold start).
ENV PORT=7860 \
    PYTHONUNBUFFERED=1 \
    APP_ENV=production \
    DATABASE_URL=sqlite+aiosqlite:///./data/db/replyflow.db \
    CHROMA_PATH=./data/chroma \
    KNOWLEDGE_PATH=./data/knowledge \
    USE_JSON_STORE=true \
    SEED_LOCAL_EMBEDDINGS=true

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

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

COPY . .

RUN mkdir -p /app/data/db /app/data/chroma /app/data/knowledge \
    && python seed_kb.py \
    && chmod -R 777 /app/data \
    && useradd -m -u 1000 user \
    && chown -R user:user /app

USER user

EXPOSE 7860

# Bind immediately; HF kills containers that do not open 7860.
CMD ["sh", "-c", \
    "uvicorn app.main:app --host 0.0.0.0 --port ${PORT:-7860}"]