"""Ticket data model for the ticketing system."""

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


class TicketStatus(str, Enum):
    OPEN = "open"
    IN_PROGRESS = "in_progress"
    RESOLVED = "resolved"
    CLOSED = "closed"


class TicketPriority(str, Enum):
    LOW = "low"
    MEDIUM = "medium"
    HIGH = "high"
    CRITICAL = "critical"


@dataclass
class Ticket:
    title: str
    description: str
    priority: TicketPriority = TicketPriority.MEDIUM
    status: TicketStatus = TicketStatus.OPEN
    assignee: str = ""
    project: str = ""
    id: Optional[int] = None
    created_at: str = ""
    updated_at: str = ""

    def __post_init__(self) -> None:
        now = datetime.now(timezone.utc).isoformat()
        if not self.created_at:
            self.created_at = now
        if not self.updated_at:
            self.updated_at = now

    def to_dict(self) -> dict:
        data = asdict(self)
        data["priority"] = self.priority.value
        data["status"] = self.status.value
        return data

    @classmethod
    def from_dict(cls, data: dict) -> "Ticket":
        data = dict(data)  # shallow copy
        data["priority"] = TicketPriority(data["priority"])
        data["status"] = TicketStatus(data["status"])
        return cls(**data)