from datetime import datetime
from typing import Literal

from pydantic import BaseModel, Field


TTLOption = Literal["1h", "24h", "7d", "never"]


class ItemCreate(BaseModel):
    body: str = Field(min_length=1)
    title: str | None = None
    is_public: bool = True
    burn_after_read: bool = False
    ttl: TTLOption = "24h"


class ItemOut(BaseModel):
    slug: str
    kind: str
    title: str
    body: str | None = None
    file_name: str | None = None
    mime: str | None = None
    size_bytes: int | None = None
    is_public: bool
    burn_after_read: bool
    expires_at: datetime | None
    created_at: datetime
    view_count: int

    model_config = {"from_attributes": True}


class WallResponse(BaseModel):
    items: list[ItemOut]
    page: int
    page_size: int
    total: int