FROM python:3.10-slim

# Set working directory
WORKDIR /app

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

# Create and set writable cache directories with proper permissions
RUN mkdir -p /tmp/hf_cache && \
    chmod -R 777 /tmp/hf_cache

# Set environment variables for Hugging Face cache
ENV HF_HOME=/tmp/hf_cache
ENV TRANSFORMERS_CACHE=/tmp/hf_cache
ENV HUGGINGFACE_HUB_CACHE=/tmp/hf_cache

# Copy requirements first to leverage Docker cache
COPY requirements.txt .

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

# Copy application code
COPY . .

# Expose port
EXPOSE 7860

# Run as non-root user for better security
RUN useradd -m myuser && chown -R myuser /app
USER myuser

# Run the app
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]