# ─────────────────────────────────────────────────────────────────
#  Group 07 — I-ILIA-014 MIR Project  •  Dockerfile (HF Spaces)
#
#  Architecture:
#    • Data decoupled from Space repo: downloaded from separate Dataset repo
#    • Archives extracted at build time into /home/user/app/
#    • Port 7860 (HF Spaces default)
#    • UID 1000 user "user" (HF Spaces convention)
#    • Layer caching: data layer cached across code-only rebuilds
# ─────────────────────────────────────────────────────────────────

FROM python:3.11-slim

RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential && rm -rf /var/lib/apt/lists/*

RUN useradd -m -u 1000 user
USER user
ENV PATH="/home/user/.local/bin:$PATH"
WORKDIR /home/user/app

# Layer 1: install huggingface_hub to run the download script
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir "huggingface_hub>=0.23"

# Layer 2: download and extract data — cached across code-only rebuilds
COPY --chown=user download_data.py .
RUN python download_data.py

# Layer 3: install app dependencies
COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Layer 4: copy app code — only this layer rebuilds on code changes
COPY --chown=user . .

ENV MIR_H5_DIR=/home/user/app/descriptors/CLIP_Flickr8k \
    MIR_MAX_BACKBONES=4 \
    MIR_DEFAULT_BACKBONE=clip

EXPOSE 7860
CMD ["gunicorn", "--chdir", "/home/user/app/Interface", "-w", "1", "-b", "0.0.0.0:7860", "--timeout", "300", "app:app"]