FROM python:3.10-slim

# Install system dependencies for OpenCV and PaddlePaddle
RUN apt-get update && apt-get install -y \
    libgl1 \
    libglib2.0-0 \
    libgomp1 \
    && rm -rf /var/lib/apt/lists/*

# Set working directory
WORKDIR /app

# 1. Install huggingface-hub first to download the model.
# This isolates the 4.7GB download layer. If you change requirements.txt or app.py,
# Docker will CACHE this download layer and NEVER pull the 4.7GB model again!
RUN pip install --no-cache-dir huggingface-hub

# 2. Download LLM weights early in the building phase.
# Points to Bartowski's stable and verified repository path to resolve the 404 error.
RUN python -c "from huggingface_hub import hf_hub_download; hf_hub_download(repo_id='Bartowski/Qwen2.5-7B-Instruct-GGUF', filename='Qwen2.5-7B-Instruct-Q4_K_M.gguf')"

# 3. Force the pre-compiled CPU wheel for instant installation
RUN pip install --no-cache-dir llama-cpp-python \
    --extra-index-url https://abetlen.github.io/llama-cpp-python/whl/cpu \
    --only-binary llama-cpp-python

# 4. Copy and install the rest of the dependencies from requirements.txt
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# 5. Copy application files (changes to app.py will only invalidate this quick layer)
COPY . .

# Set environment variables for Gradio
ENV GRADIO_SERVER_NAME="0.0.0.0"
ENV GRADIO_SERVER_PORT="7860"

# Expose the Gradio port
EXPOSE 7860

# Run the application
CMD ["python", "app.py"]