FROM python:3.13.5-slim

WORKDIR /app

# Install OS-level dependencies including ffmpeg and OpenCV requirements
RUN apt-get update && apt-get install -y \
    build-essential \
    curl \
    git \
    ffmpeg \
    libsm6 \
    libxext6 \
    libfontconfig1 \
    libxrender1 \
    libgl1-mesa-glx \
    libglib2.0-0 \
    && rm -rf /var/lib/apt/lists/*

# Copy dependency spec and source code
COPY requirements.txt ./
COPY . ./

# Install Python dependencies
RUN pip3 install --no-cache-dir -r requirements.txt

# Set environment variables for Streamlit and Keras
ENV STREAMLIT_HOME=/tmp/.streamlit
ENV STREAMLIT_BROWSER_GATHER_USAGE_STATS=false
ENV KERAS_BACKEND=torch
ENV OPENCV_LOG_LEVEL=ERROR

# Expose the port used by Streamlit
EXPOSE 8501

# Healthcheck: test whether Streamlit's health endpoint is alive
HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health

# Launch Streamlit app; bind to 0.0.0.0 so external connections work
ENTRYPOINT ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0"]