FROM python:3.11-slim

# Set environment variables for better HF performance
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PORT=7860 \
    TRANSFORMERS_CACHE=/tmp/transformers_cache \
    SENTENCE_TRANSFORMERS_HOME=/tmp/sentence_transformers_cache

WORKDIR /app

# Install system dependencies (including audio libs for XTTSv2)
RUN apt-get update && apt-get install -y \
    build-essential \
    libpq-dev \
    libsndfile1 \
    ffmpeg \
    espeak-ng \
    && rm -rf /var/lib/apt/lists/*

# Create a non-root user (Hugging Face runs as UID 1000)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

# Install python dependencies as the user
COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt

# Cache-bust: change this value to force Docker to re-copy source files
ARG CACHE_BUST=v9

# Copy application code (fresh, no cache)
COPY --chown=user . .

# Remove any stale bytecode
RUN find /app -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null; true

# Expose port 7860 for Hugging Face Spaces
EXPOSE 7860

# Start the application with debug logging
CMD ["uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "7860", "--log-level", "debug"]