# 1. Base image with Python 3.10
FROM python:3.10-slim

# Container environment settings
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PORT=7860 \
    HF_HOME=/tmp/huggingface \
    TRANSFORMERS_CACHE=/tmp/huggingface

WORKDIR /app

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

# Install python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Create non-root user (Hugging Face Spaces runs as UID 1000)
RUN useradd -m -u 1000 user

# Copy application files
COPY backend ./backend
COPY frontend ./frontend
COPY start.sh .

# Create data directories and grant permissions to UID 1000
RUN mkdir -p /data /app/data/chroma_db /app/data/uploads /tmp/huggingface && \
    chmod +x /app/start.sh && \
    chown -R 1000:1000 /data /app /tmp/huggingface

USER 1000

# Hugging Face Spaces listens on port 7860
EXPOSE 7860

CMD ["/app/start.sh"]