# Use Python 3.10 slim image for smaller size
FROM python:3.10-slim

# Set working directory
WORKDIR /app

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

# Create cache directories with proper permissions
RUN mkdir -p /tmp/transformers_cache /tmp/hf_cache && \
    chmod 777 /tmp/transformers_cache /tmp/hf_cache

# Set environment variables for caching
ENV TRANSFORMERS_CACHE=/tmp/transformers_cache
ENV HF_HOME=/tmp/hf_cache
ENV TRANSFORMERS_OFFLINE=0
ENV HF_DATASETS_OFFLINE=0

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

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

# Create directories for models and temp files
RUN mkdir -p /app/models /app/temp

# Copy application code
COPY app.py .

# Set environment variables
ENV PYTHONUNBUFFERED=1
ENV FLASK_APP=app.py
ENV FLASK_ENV=production
ENV PORT=7860

# Expose port
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=30s --start-period=120s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Command to run the application
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "1", "--timeout", "300", "--worker-class", "sync", "--preload", "app:app"]