from dataclasses import dataclass, field
from datetime import datetime
from enum import Enum
from typing import Optional


class Priority(str, Enum):
    high = "high"
    medium = "medium"
    low = "low"


class Status(str, Enum):
    open = "open"
    in_progress = "in_progress"
    blocked = "blocked"
    resolved = "resolved"


@dataclass
class Todo:
    id: Optional[int]
    title: str
    repo: str = ""
    status: Status = Status.open
    priority: Priority = Priority.medium
    assignee: str = ""
    tags: list[str] = field(default_factory=list)
    created_at: str = field(default_factory=lambda: datetime.utcnow().isoformat() + "Z")
    updated_at: str = field(default_factory=lambda: datetime.utcnow().isoformat() + "Z")
    resolved_at: Optional[str] = None