from pydantic import BaseModel
from datetime import datetime
from typing import Optional


class EventBase(BaseModel):
    title: str
    description: Optional[str] = None
    location: Optional[str] = None
    start_date: datetime
    end_date: Optional[datetime] = None
    max_attendees: Optional[int] = None
    is_public: bool = True
    image_url: Optional[str] = None


class EventCreate(EventBase):
    pass


class EventUpdate(BaseModel):
    title: Optional[str] = None
    description: Optional[str] = None
    location: Optional[str] = None
    start_date: Optional[datetime] = None
    end_date: Optional[datetime] = None
    max_attendees: Optional[int] = None
    is_public: Optional[bool] = None
    image_url: Optional[str] = None


class EventResponse(EventBase):
    id: int
    created_by: int
    created_at: datetime
    updated_at: datetime
    creator_name: Optional[str] = None
    registered_count: int = 0
    is_registered: bool = False

    class Config:
        from_attributes = True


class EventRegistrationResponse(BaseModel):
    id: int
    event_id: int
    user_id: int
    status: str
    registered_at: datetime
    user_name: Optional[str] = None

    class Config:
        from_attributes = True