from pydantic import BaseModel, Field, ConfigDict
from datetime import datetime, timezone
from typing import Optional
import uuid

class Message(BaseModel):
    model_config = ConfigDict(extra="ignore")
    id: str = Field(default_factory=lambda: str(uuid.uuid4()))
    sender_id: str
    receiver_id: str
    content: str
    read: bool = False
    timestamp: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class SendMessageRequest(BaseModel):
    receiver_id: str
    content: str