from enum import Enum
from pydantic import BaseModel, Field
from datetime import datetime
from typing import Any, Optional, Dict

class EventType(str, Enum):
    USER_CREATED = "user.created"
    USER_UPDATED = "user.updated"
    USER_DELETED = "user.deleted"
    USER_LOGIN = "user.login"
    
    IMAGE_UPLOADED = "image.uploaded"
    IMAGE_CACHED = "image.cached"
    IMAGE_DELETED = "image.deleted"
    
    TASK_CREATED = "task.created"
    TASK_COMPLETED = "task.completed"
    TASK_FAILED = "task.failed"

class Event(BaseModel):
    event_type: EventType
    timestamp: datetime = Field(default_factory=datetime.now)
    service: str
    data: Dict[str, Any]
    correlation_id: Optional[str] = None
    user_id: Optional[str] = None
    
    class Config:
        json_encoders = {
            datetime: lambda v: v.isoformat()
        }