from __future__ import annotations
from pydantic import BaseModel
from datetime import datetime


class User(BaseModel):
    id: str = ""
    telegram_id: int
    username: str | None = None
    invited_by: str | None = None
    has_invited_user: bool = False
    registered: bool = False
    status: str = "active"
    created_at: datetime | None = None
    last_activity: datetime | None = None


class Invite(BaseModel):
    id: str = ""
    inviter_user_id: str
    invited_user_id: str | None = None
    code: str
    status: str = "pending"
    created_at: datetime | None = None


class Channel(BaseModel):
    id: str = ""
    telegram_channel_id: int
    name: str
    is_required: bool = True
    created_at: datetime | None = None


class Document(BaseModel):
    id: str = ""
    name: str
    file_path: str | None = None
    uploaded_by: str | None = None
    created_at: datetime | None = None
    status: str = "processing"


class DocumentChunk(BaseModel):
    id: str = ""
    document_id: str
    text: str
    embedding: list[float] | None = None
    page_number: int | None = None
    chunk_index: int
    created_at: datetime | None = None


class Log(BaseModel):
    id: str = ""
    type: str
    message: str
    user_id: str | None = None
    metadata: dict = {}
    created_at: datetime | None = None