"""Participant model - unified participant for users and agents."""
from datetime import datetime
from typing import Optional, Dict, Any, TYPE_CHECKING
from dataclasses import dataclass
from enum import Enum

if TYPE_CHECKING:
    from luxx.models.user import User


class ParticipantType(Enum):
    USER = "user"
    AGENT = "agent"


@dataclass
class Participant:
    """Unified participant abstraction for users and agents."""
    participant_id: str
    name: str
    participant_type: ParticipantType
    avatar: Optional[str] = None
    role: Optional[str] = None  # ChatRoom role: owner/admin/member
    permission_level: int = 1
    is_active: bool = True
    created_at: Optional[datetime] = None

    @property
    def is_agent(self) -> bool:
        return self.participant_type == ParticipantType.AGENT

    @property
    def is_user(self) -> bool:
        return self.participant_type == ParticipantType.USER

    def to_dict(self) -> Dict[str, Any]:
        return {
            "id": self.participant_id,
            "name": self.name,
            "type": self.participant_type.value,
            "avatar": self.avatar,
            "role": self.role,
            "permission_level": self.permission_level,
            "is_active": self.is_active,
            "created_at": self.created_at.isoformat() if self.created_at else None
        }

    @classmethod
    def from_user(cls, user: "User") -> "Participant":
        return cls(
            participant_id=f"user:{user.id}",
            name=user.username,
            participant_type=ParticipantType.USER,
            permission_level=user.permission_level,
            is_active=user.is_active,
            created_at=user.created_at
        )

    @classmethod
    def from_agent(
        cls, agent_id: str, name: str, role: str = None,
        avatar: str = None, permission_level: int = 1, is_active: bool = True
    ) -> "Participant":
        return cls(
            participant_id=f"agent:{agent_id}",
            name=name,
            participant_type=ParticipantType.AGENT,
            role=role,
            avatar=avatar,
            permission_level=permission_level,
            is_active=is_active
        )