# Use lightweight python base image
FROM python:3.11-slim

# Install compilation and runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    git \
    make \
    g++ \
    curl \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# Create and set app directory
WORKDIR /app

# 1. Clone lichess-bot repository directly into /app (since /app is empty, this works perfectly)
RUN git clone --depth 1 https://github.com/lichess-bot-devs/lichess-bot.git .

# 2. Install python requirements
RUN pip install --no-cache-dir -r requirements.txt

# 3. Clone and compile Stockfish with elshater77 branding, copying binary to /app/engines/
RUN git clone --depth 1 https://github.com/official-stockfish/Stockfish.git /tmp/stockfish && \
    cd /tmp/stockfish/src && \
    # Patch branding to elshater77
    sed -i 's/id name Stockfish/id name elshater77/g' uci.cpp || true && \
    sed -i 's/"Stockfish"/"elshater77"/g' engine_info.cpp || true && \
    # Build engine optimized for modern standard CPUs
    make -j$(nproc) build ARCH=x86-64-modern && \
    cp stockfish /app/engines/elshater77_engine && \
    chmod +x /app/engines/elshater77_engine && \
    # Clean up source files
    rm -rf /tmp/stockfish

# Copy config template and secure launcher
COPY config.yml.template /app/config.yml.template
COPY start.py /app/start.py

# Expose port 7860 to pass Hugging Face Spaces health checks!
EXPOSE 7860

# Run secure startup script
CMD ["python", "start.py"]