"""UI-agnostic installer engine."""

from __future__ import annotations

from typing import Iterable

from .milestone import Milestone
from .runner import InstallerRunner
from .state import InstallerState


class InstallerCore:
    """Convenience wrapper around the runner and milestones."""

    def __init__(
        self, milestones: Iterable[Milestone], state: InstallerState | None = None
    ):
        self.runner = InstallerRunner(milestones, state=state)

    @property
    def state(self) -> InstallerState:
        return self.runner.state

    def on(self, event: str, callback) -> None:
        self.runner.on(event, callback)

    def run(self, start_id: str | None = None) -> bool:
        return self.runner.run(start_id=start_id)