import type { VerificationIssueStage } from './verificationBoardStages';

export const VERIFICATION_ISSUE_EVENT_TOPIC = '/sub/verification-issues/events';

export type VerificationIssueEventType = 'CREATED' | 'STAGE_CHANGED';

export interface VerificationIssueEventDto {
  eventType: VerificationIssueEventType;
  issueId: number;
  title: string;
  stage: VerificationIssueStage;
  previousStage?: VerificationIssueStage | null;
  updatedAt?: string;
  sourceDeviceId?: string | null;
}

export interface VerificationIssueToastItem {
  id: string;
  issueId: number;
  title: string;
  stage: VerificationIssueStage;
  previousStage?: VerificationIssueStage | null;
  eventType: VerificationIssueEventType;
}

export function getVerificationDeviceId(): string {
  let id = localStorage.getItem('gc_device_id');
  if (!id) {
    id = crypto.randomUUID();
    localStorage.setItem('gc_device_id', id);
  }
  return id;
}

export function parseVerificationIssueEvent(raw: string): VerificationIssueEventDto | null {
  try {
    const data = JSON.parse(raw) as VerificationIssueEventDto;
    if (data.issueId == null || !data.eventType || !data.title) return null;
    if (data.eventType !== 'CREATED' && data.eventType !== 'STAGE_CHANGED') return null;
    return data;
  } catch {
    return null;
  }
}

export function shouldShowVerificationIssueEvent(event: VerificationIssueEventDto): boolean {
  const localDevice = getVerificationDeviceId();
  if (event.sourceDeviceId && event.sourceDeviceId === localDevice) {
    return false;
  }
  return true;
}

export function eventToToast(event: VerificationIssueEventDto): VerificationIssueToastItem {
  return {
    id: `${event.eventType}-${event.issueId}-${event.updatedAt ?? Date.now()}`,
    issueId: event.issueId,
    title: event.title,
    stage: event.stage,
    previousStage: event.previousStage,
    eventType: event.eventType,
  };
}