# Use Python 3.10 slim image
FROM python:3.10-slim

# Set working directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for better caching
COPY requirements.txt .

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

# Create non-root user
RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app

# Copy application files
COPY . .

# Create necessary directories with proper permissions
RUN mkdir -p templates property_db /tmp/hf_cache /tmp/chromadb_properties
RUN mkdir -p /tmp/hf_cache/transformers /tmp/hf_cache/datasets /tmp/hf_cache/hub /tmp/hf_cache/chroma /tmp/hf_cache/onnx /tmp/hf_cache/sentence_transformers
RUN chmod -R 755 /tmp/hf_cache /tmp/chromadb_properties
RUN chown -R appuser:appuser /tmp/hf_cache /tmp/chromadb_properties

# Set environment variables
ENV PYTHONPATH=/app
ENV FLASK_APP=app.py
ENV PORT=7860
ENV HF_HOME=/tmp/hf_cache
ENV TRANSFORMERS_CACHE=/tmp/hf_cache/transformers
ENV HF_DATASETS_CACHE=/tmp/hf_cache/datasets
ENV HF_HUB_CACHE=/tmp/hf_cache/hub
ENV CHROMA_CACHE_DIR=/tmp/hf_cache/chroma
ENV ONNXRUNTIME_CACHE_DIR=/tmp/hf_cache/onnx
ENV SENTENCE_TRANSFORMERS_HOME=/tmp/hf_cache/sentence_transformers
ENV CHROMADB_PERSIST_DIRECTORY=/tmp/chromadb_properties
ENV CHROMADB_IS_PERSISTENT=true

# Expose port (Hugging Face Spaces uses 7860)
EXPOSE 7860

# Switch to non-root user
USER appuser

# Health check
HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/api/health || exit 1

# Run the application
CMD ["python", "app.py"]