# Use Python 3.11 slim image for smaller size
FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    PORT=7860

# Set working directory
WORKDIR /app

# Install system dependencies (ffmpeg for yt-dlp, curl for healthchecks)
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    curl \
    && rm -rf /var/lib/apt/lists/*

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

# Install Python dependencies
RUN pip install --upgrade pip && \
    pip install -r requirements.txt

# Copy application code
COPY . .

# Expose port (documentation; HF handles actual port mapping)
EXPOSE 7860

# Health check (uses PORT env var with fallback)
HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
    CMD curl -f http://localhost:7860/ || exit 1

# Run the application
# Assumes run.py reads PORT from environment and binds to 0.0.0.0
CMD ["python", "run.py"]