from pydantic import BaseModel, EmailStr
from bson import ObjectId
from typing import Optional
from datetime import datetime

class User(BaseModel):
    username: str
    email: EmailStr
    password: str

class TokenData(BaseModel):
    username: Optional[str] = None

class Token(BaseModel):
    access_token: str
    token_type: str

class FileUpload(BaseModel):
    filename: str
    content: list[dict]
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None
    
class Opportunity(BaseModel):
    username:str
    activity: str
    closeDate: Optional[datetime] = None
    customerContact: str
    customerContactRole: str
    customerName: str
    nextSteps: str
    opportunityDescription: str
    opportunityId: str
    opportunityName: str
    opportunityState: str
    opportunityValue: str
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None
    
    class Config:
        json_encoders = {
            datetime: lambda v: v.isoformat(),
            ObjectId: lambda v: str(v)
        }
        allow_population_by_field_name = True

class ChatMessage(BaseModel):
    message: str
    timestamp: datetime
    sender: str