"""保存的大屏：存储记录与接口模型。页面本身（PageSchema）按原始 JSON 存取，校验见 app/schemas/screen.py"""

from datetime import datetime
from typing import Annotated, Any, Literal

from pydantic import BaseModel, Field, StringConstraints

NAME_MAX_LENGTH = 100
DEFAULT_NAME = "未命名大屏"

ScreenName = Annotated[
    str,
    StringConstraints(strip_whitespace=True, min_length=1, max_length=NAME_MAX_LENGTH),
]
PublishStatus = Literal["published", "offline"]
ListStatus = Literal["draft", "published", "offline"]
SortField = Literal["updated_at", "created_at", "name"]


class PublishInfo(BaseModel):
    """screens.publish：线上版本的指针，快照本身在 screen_publishes"""

    status: PublishStatus
    version: int  # 当前线上版本号
    revision: int  # 线上版本是从哪个 revision 发出去的
    share_id: str
    published_at: datetime


class ScreenSummary(BaseModel):
    """不含页面的大屏记录，列表、元数据更新和线上读取用"""

    screen_id: str
    owner_id: int
    name: str
    thumbnail: str | None = None
    canvas: dict[str, Any] | None = None
    revision: int
    created_at: datetime
    updated_at: datetime
    deleted_at: datetime | None = None
    publish: PublishInfo | None = None


class ScreenRecord(ScreenSummary):
    page: dict[str, Any]


class PublishEntry(BaseModel):
    screen_id: str
    version: int
    revision: int
    published_at: datetime
    published_by: int


class PublishSnapshot(PublishEntry):
    """发布快照，只增不改"""

    page: dict[str, Any]


# ---- 请求 ----


class ScreenCreate(BaseModel):
    name: ScreenName = DEFAULT_NAME
    page: dict[str, Any] | None = None


class ScreenSave(BaseModel):
    page: dict[str, Any]
    revision: int = Field(ge=0)


class ScreenRename(BaseModel):
    name: ScreenName


class ScreenPublishRequest(BaseModel):
    revision: int = Field(ge=0)


class ScreenCopyRequest(BaseModel):
    name: ScreenName | None = None


# ---- 响应 ----


class ScreenCreated(BaseModel):
    screen_id: str
    revision: int


class PublishBrief(BaseModel):
    status: PublishStatus
    version: int
    share_id: str
    published_at: datetime


class ScreenDetail(BaseModel):
    screen_id: str
    name: str
    page: dict[str, Any]
    revision: int
    updated_at: datetime
    publish: PublishBrief | None


class ScreenSaved(BaseModel):
    revision: int
    updated_at: datetime


class ScreenPublished(BaseModel):
    version: int
    share_id: str
    published_at: datetime


class ScreenListItem(BaseModel):
    screen_id: str
    name: str
    thumbnail_url: str | None
    canvas: dict[str, Any] | None
    status: ListStatus
    has_unpublished_changes: bool
    share_id: str | None
    updated_at: datetime
    published_at: datetime | None
    deleted_at: datetime | None
    # 在回收站里的大屏，到这个时间会被自动彻底删除
    purge_at: datetime | None


class ScreenList(BaseModel):
    items: list[ScreenListItem]
    total: int


class TrashEmptied(BaseModel):
    count: int


class ScreenCopied(BaseModel):
    screen_id: str


class ThumbnailResult(BaseModel):
    thumbnail_url: str


class PublishHistoryItem(BaseModel):
    version: int
    revision: int
    published_at: datetime
    published_by: int


class PublishHistory(BaseModel):
    items: list[PublishHistoryItem]
    total: int


class ScreenRestored(BaseModel):
    revision: int


class PublicScreen(BaseModel):
    name: str
    page: dict[str, Any]
    version: int
    published_at: datetime