"""EditTemplateVersion — 模板发布版本快照，用于回滚和版本历史."""

from __future__ import annotations

from dataclasses import dataclass, field
from datetime import datetime, timezone
from typing import Any
from uuid import uuid4


@dataclass(slots=True)
class EditTemplateVersion:
    """模板发布版本快照

    每次发布时保存模板当时的完整状态（config + clip_configs），
    支持回滚到任意历史版本。
    """

    id: str
    template_id: str
    version: int
    name: str = ""
    editing_mode: str = "one_take"
    config: dict[str, Any] = field(default_factory=dict)
    clip_configs: list[dict[str, Any]] = field(default_factory=list)
    change_note: str = ""
    published_by: str = ""
    created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))

    @classmethod
    def create(
        cls,
        template_id: str,
        version: int,
        *,
        name: str = "",
        editing_mode: str = "one_take",
        config: dict[str, Any] | None = None,
        clip_configs: list[dict[str, Any]] | None = None,
        change_note: str = "",
        published_by: str = "",
    ) -> "EditTemplateVersion":
        return cls(
            id=uuid4().hex,
            template_id=template_id,
            version=version,
            name=name,
            editing_mode=editing_mode,
            config=config or {},
            clip_configs=clip_configs or [],
            change_note=change_note,
            published_by=published_by,
        )