FROM python:3.11-slim

# Create and set the working directory
WORKDIR /app

# Prevent some interactive prompts during package installation
ENV DEBIAN_FRONTEND=noninteractive

# Install ffmpeg and other system dependencies. The list largely mirrors
# the original project but omits PostgreSQL development headers which are
# unused here. We include libgl1 and libglib2.0-0 so that MoviePy
# (through its dependencies) can find OpenGL and GLib when using the
# Pillow and numpy backends.
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
        ffmpeg \
        libgl1 \
        libglib2.0-0 \
        build-essential \
        xvfb \
        xdg-utils \
        wget \
        unzip \
        ffmpeg \
        libgomp1 \
        libpq-dev \
        vim \
        libmagick++-dev \
        imagemagick \
        fonts-liberation \
        sox \
        bc \
        gsfonts && \
    rm -rf /var/lib/apt/lists/*

# Copy dependency specification and install Python dependencies
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application code
COPY . .

# Declare volumes for videos and outputs. These paths correspond to the
# mount points defined in the docker-compose file. Using VOLUME here
# documents the intended persistent storage locations.
VOLUME ["/app/videos", "/app/outputs"]

# The default command starts the consumer loop
CMD ["python", "-u", "main.py"]