FROM python:3.10-slim

WORKDIR /app

# Install system dependencies (ffmpeg for audio/video processing)
RUN apt-get update && apt-get install -y \
    ffmpeg \
    libglib2.0-0 \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first to leverage Docker cache
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy the application code (excludes venv, models, .whl via .dockerignore)
COPY . .

# HuggingFace Spaces expects port 7860
EXPOSE 7860

# Set environment variables for HF deployment
# IMPORTANT: Do NOT set TRANSFORMERS_OFFLINE or HF_HUB_OFFLINE here — models must download
ENV TRANSFORMERS_CACHE=/app/cache
ENV HF_HOME=/app/cache
ENV TRANSFORMERS_OFFLINE=0
ENV HF_HUB_OFFLINE=0
ENV PORT=7860

# Create cache directory with write permissions
RUN mkdir -p /app/cache /app/sessions && chmod -R 777 /app/cache /app/sessions

# Start the FastAPI app via uvicorn on port 7860
CMD ["uvicorn", "fusion_engine:app", "--host", "0.0.0.0", "--port", "7860"]