FROM python:3.12-slim

ENV PYTHONUNBUFFERED=1 \
    UV_SYSTEM_PYTHON=1 \
    APP_DATA_DIR=/data \
    VIDEO_ARCHIVE=/videos

# ffmpeg does the trimming and frame extraction; libgl1/libglib2.0-0 are what
# OpenCV needs once ultralytics pulls in the non-headless build.
RUN apt-get update && apt-get install -y --no-install-recommends \
        ffmpeg libgl1 libglib2.0-0 \
    && rm -rf /var/lib/apt/lists/*

# uv comes from PyPI rather than `COPY --from=ghcr.io/astral-sh/uv`: pulling it
# from a second registry made every build fail whenever ghcr.io was unreachable,
# even with all the dependency layers already cached. This is the only pip call
# in the project — bootstrapping the tool that installs everything else.
RUN pip install --no-cache-dir uv

WORKDIR /app

# Dependencies first so code edits don't re-download ~3 GB of CUDA wheels.
COPY requirements.txt ./
RUN uv pip install -r requirements.txt

# The vendored SAM3 declares timm/ftfy/regex/tqdm itself, so this install keeps
# its dependencies (unlike einops + pycocotools, which it needs but never
# declares — those are pinned in requirements.txt).
COPY sam3/ ./sam3/
RUN uv pip install -e ./sam3

# The counting pipeline (tracker, stabiliser, line counter) lives in
# algoritma-batch and imports itself as `src.*`. Copied to /app/src so those
# imports resolve unchanged rather than being duplicated into backend/.
COPY algoritma-batch/src/ ./src/
# tracking.py resolves its ByteTrack tuning as ../cfg/tracker.yaml relative to
# src/, so the two directories have to keep that shape inside the image.
COPY algoritma-batch/cfg/ ./cfg/

COPY backend/ ./backend/

EXPOSE 8000
CMD ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "8000"]