"""A scenario binds a use case to concrete actors, a world and a schedule."""

from __future__ import annotations

from dataclasses import dataclass, field
from typing import Sequence

from .actions import SemanticAction
from .intent import UseCase
from .observers import Watch


@dataclass(frozen=True, slots=True)
class Step:
    """One scheduled semantic action, attributed to one actor."""

    id: str
    actor_id: str
    action: SemanticAction
    expect_refusal: bool = False


@dataclass(frozen=True, slots=True)
class Scenario:
    """UseCase + Actors + World + Schedule + Surfaces + Variant."""

    id: str
    use_case: UseCase
    steps: tuple[Step, ...]
    watches: tuple[Watch, ...] = field(default_factory=tuple)
    variant: str = "baseline"


@dataclass(slots=True)
class VerificationAsset:
    """A test as a durable thing with identity, maturity and lineage.

    Maturity is the T0..T5 continuum. The kernel produces T5 assets: fully
    deterministic, no model involvement. Agentic assets (T1) arrive in T07, and
    crystallization walks an asset from T1 toward T5 in T09.
    """

    id: str
    scenario: Scenario
    maturity: str = "T5"
    parent_id: str | None = None
    adaptation_history: list[dict] = field(default_factory=list)