FROM python:3.10

ENV PYTHONUNBUFFERED=1

# Install uv
# Ref: https://docs.astral.sh/uv/guides/integration/docker/#installing-uv
COPY --from=ghcr.io/astral-sh/uv:0.9.26 /uv /uvx /bin/

# Compile bytecode
# Ref: https://docs.astral.sh/uv/guides/integration/docker/#compiling-bytecode
ENV UV_COMPILE_BYTECODE=1

# uv Cache
# Ref: https://docs.astral.sh/uv/guides/integration/docker/#caching
ENV UV_LINK_MODE=copy

WORKDIR /app/

# Place executables in the environment at the front of the path
# Ref: https://docs.astral.sh/uv/guides/integration/docker/#using-the-environment
ENV PATH="/app/.venv/bin:$PATH"

# Install dependencies
# Ref: https://docs.astral.sh/uv/guides/integration/docker/#intermediate-layers
RUN --mount=type=cache,target=/root/.cache/uv \
    --mount=type=bind,source=uv.lock,target=uv.lock \
    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
    uv sync --frozen --no-install-workspace --package app

COPY ./backend/scripts /app/backend/scripts

COPY ./backend/pyproject.toml ./backend/alembic.ini /app/backend/

COPY ./backend/app /app/backend/app

# Sync the project
# Ref: https://docs.astral.sh/uv/guides/integration/docker/#intermediate-layers
RUN --mount=type=cache,target=/root/.cache/uv \
    --mount=type=bind,source=uv.lock,target=uv.lock \
    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
    uv sync --frozen --package app

# Connectors are ordinary installed packages found through the
# `fluksio.node_types` entry point. `make connectors` builds them into here;
# an image with none is the normal case.
COPY ./backend/connector-wheels /tmp/connector-wheels
RUN --mount=type=cache,target=/root/.cache/uv \
    sh -c 'ls /tmp/connector-wheels/*.whl >/dev/null 2>&1 \
      && uv pip install --python /app/.venv/bin/python /tmp/connector-wheels/*.whl \
      || echo "no connectors bundled"'

WORKDIR /app/backend/

# Single worker on purpose: the process hosts the flow engine, and a second
# worker would be a second engine — duplicated subscriptions, cron ticks and
# webhooks. Scaling out is the M5 worker split, not more uvicorn processes.
CMD ["fastapi", "run", "app/main.py"]