from __future__ import annotations

from core.models import Bounds, Scene, SceneElement
from semantic.models import SemanticScene, SemanticWidget
from world.models import WorldEvent, WorldState


def _scene() -> Scene:
    return Scene(
        width=10,
        height=20,
        elements=[
            SceneElement(
                id="send",
                type="button",
                text="Send",
                bounds=Bounds(1, 2, 3, 4),
            )
        ],
    )


def test_world_event_and_state_to_dict() -> None:
    semantic_scene = SemanticScene(
        page="Chat",
        intents=["send a message"],
        widgets=[SemanticWidget(element_id="send", purpose="send message")],
    )
    event = WorldEvent(
        scene_summary=semantic_scene,
        action="tap",
        success=True,
    )
    state = WorldState.with_history_bound(2)
    state.current_app = "com.example.chat"
    state.current_page = "Chat"
    state.variables["contact"] = "Zhang San"
    state.history.append(event)

    data = state.to_dict()

    assert data["current_app"] == "com.example.chat"
    assert data["current_page"] == "Chat"
    assert data["variables"] == {"contact": "Zhang San"}
    assert data["history"][0]["scene_summary"] == semantic_scene.to_dict()
    assert data["history"][0]["action"] == "tap"
    assert data["history"][0]["success"] is True
    assert data["history"][0]["timestamp"]


def test_world_state_history_evicts_oldest_entry_at_bound() -> None:
    state = WorldState.with_history_bound(2)

    state.history.append(WorldEvent(_scene(), "first", True))
    state.history.append(WorldEvent(_scene(), "second", True))
    state.history.append(WorldEvent(_scene(), "third", True))

    assert len(state.history) == 2
    assert [event.action for event in state.history] == ["second", "third"]
    assert state.history.maxlen == 2