from __future__ import annotations

from datetime import datetime, timezone
from typing import Any, Literal

from pydantic import BaseModel, ConfigDict, Field

from time_machine.domain.models import (
    AudioResult,
    CharacterPortrait,
    Destination,
    ImmersiveScene,
    Narration,
    Persona,
    Souvenir,
    Transcript,
    VisualArtifact,
)


def utc_now() -> datetime:
    return datetime.now(timezone.utc)


class TemporalEvent(BaseModel):
    model_config = ConfigDict(extra="forbid")

    event_type: str
    message: str | None = None
    created_at: datetime = Field(default_factory=utc_now)
    metadata: dict[str, Any] = Field(default_factory=dict)


class MachineStateEvent(TemporalEvent):
    event_type: Literal["machine_state"] = "machine_state"
    state: str


class DestinationEvent(TemporalEvent):
    event_type: Literal["destination"] = "destination"
    destination: Destination


class PersonaEvent(TemporalEvent):
    event_type: Literal["persona"] = "persona"
    persona: Persona


class TranscriptEvent(TemporalEvent):
    event_type: Literal["transcript"] = "transcript"
    transcript: Transcript


class ConversationTextEvent(TemporalEvent):
    event_type: Literal["conversation_text"] = "conversation_text"
    text: str
    is_final: bool = True


class AudioEvent(TemporalEvent):
    event_type: Literal["audio"] = "audio"
    audio: AudioResult


class SceneEvent(TemporalEvent):
    event_type: Literal["scene"] = "scene"
    scene: ImmersiveScene


class PortraitEvent(TemporalEvent):
    event_type: Literal["portrait"] = "portrait"
    portrait: CharacterPortrait


class NarrationEvent(TemporalEvent):
    event_type: Literal["narration"] = "narration"
    narration: Narration


class VisualArtifactEvent(TemporalEvent):
    event_type: Literal["visual_artifact"] = "visual_artifact"
    artifact: VisualArtifact


class SouvenirEvent(TemporalEvent):
    event_type: Literal["souvenir"] = "souvenir"
    souvenir: Souvenir


class ErrorEvent(TemporalEvent):
    event_type: Literal["error"] = "error"
    severity: Literal["recoverable", "fatal"] = "recoverable"