FROM python:3.10-slim

# Install system dependencies
RUN apt-get update && apt-get install -y \
    ffmpeg \
    libsndfile1 \
    wget \
    git \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Set working directory
WORKDIR /app

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

# Install PyTorch CPU-only version first (much smaller and faster)
RUN pip install --no-cache-dir torch==2.5.1 torchaudio==2.5.1 --index-url https://download.pytorch.org/whl/cpu

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

# Download spacy model during build to avoid runtime network calls
RUN python -m spacy download en_core_web_sm

# Copy application code
COPY app.py .

# Create directory for models (they will be downloaded on first run)
RUN mkdir -p /app/models

# Set environment variables
ENV PYTHONUNBUFFERED=1

# Expose port
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=120s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Run the application
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]