# Use official lightweight Python image
FROM python:3.10-slim

# Install system dependencies for 'dlib' (Face extraction) and 'ffmpeg' (Audio extraction)
RUN apt-get update && apt-get install -y \
    build-essential \
    cmake \
    ffmpeg \
    libopenblas-dev \
    liblapack-dev \
    && rm -rf /var/lib/apt/lists/*

# Set working directory
WORKDIR /app

# Create HuggingFace User mapped to id 1000
RUN useradd -m -u 1000 user
USER user
ENV PATH="/home/user/.local/bin:$PATH"

# Ensure we have the latest pip
RUN pip install --user --no-cache-dir --upgrade pip

# Install dlib explicitly first to cache its heavy C++ build phase
# We MUST set CMAKE_BUILD_PARALLEL_LEVEL=1 and low optimization to prevent OOM crash!
ENV CMAKE_BUILD_PARALLEL_LEVEL=1
ENV CXXFLAGS="-O1"
RUN pip install --user --no-cache-dir "dlib>=19.24.0"

# Install requirements
COPY --chown=user web_ui/requirements.txt .
RUN pip install --user --no-cache-dir -r requirements.txt

# Copy the entire project codebase
COPY --chown=user . .

# Expose Gradio default port
EXPOSE 7860
ENV GRADIO_SERVER_NAME="0.0.0.0"

# HF Spaces passes the user environment variables dynamically
CMD ["python", "-u", "web_ui/app.py"]