export type CheckCategory = 'lint' | 'specs' | 'e2e' | 'other';

export type CategoryState = 'fail' | 'running' | 'pending' | 'pass' | 'skipped' | 'none';

export interface CheckInfo {
  name: string;
  state: CategoryState;
  url: string | null;
}

export interface CategoryStatus {
  category: CheckCategory;
  state: CategoryState;
  passed: number;
  /** Non-skipped check count (drives the "7/9" chip summary). */
  total: number;
  checks: CheckInfo[];
}

export type ReviewState = 'no_review' | 'outstanding' | 'addressed';

export interface ReviewerVerdict {
  reviewer: string;
  state: 'APPROVED' | 'CHANGES_REQUESTED';
  url: string;
  submittedAt: string;
}

export interface PrSnapshot {
  id: string;
  repo: string;
  number: number;
  title: string;
  url: string;
  author: string;
  isDraft: boolean;
  /** GitHub's merge-conflict state; UNKNOWN while GitHub is still computing it. */
  mergeable: 'MERGEABLE' | 'CONFLICTING' | 'UNKNOWN';
  branch: string;
  updatedAt: string;
  labels: string[];
  /** Per-PR review environment, when the repo configures one and the label matches. */
  previewUrl: string | null;
  reviewState: ReviewState;
  unresolvedThreads: number;
  totalThreads: number;
  verdicts: ReviewerVerdict[];
  categories: CategoryStatus[];
}

export type TimelineKind = 'issue_comment' | 'review_comment' | 'review';

export interface TimelineEvent {
  id: string;
  prId: string;
  repo: string;
  prNumber: number;
  prTitle: string;
  kind: TimelineKind;
  actor: string;
  createdAt: string;
  bodyExcerpt: string;
  url: string;
  reviewState: string | null;
  path: string | null;
  read: boolean;
  /** Trailing lines of the diff hunk a review comment is anchored to. */
  diffHunk: string | null;
  /** Set when this is a reply within a review thread: the thread's root comment. */
  inReplyTo: { actor: string; bodyExcerpt: string } | null;
}

export interface SpecFailure {
  path: string;
  line: number | null;
  name: string;
  message: string;
}

export interface FailureReportSummary {
  key: string;
  label: string;
  failed: number;
  truncated: boolean;
}

export interface FailureReport extends FailureReportSummary {
  fetchedAt: string;
  failures: SpecFailure[];
}

export interface StatePayload {
  /** The configured GitHub login this dashboard belongs to. */
  user: string;
  prs: PrSnapshot[];
  lastSyncAt: string | null;
  lastSyncError: string | null;
  unreadCountsByPr: Record<string, number>;
  unreadTotal: number;
  failuresByPr: Record<string, FailureReportSummary[]>;
}

export interface TimelinePage {
  events: TimelineEvent[];
  nextCursor: string | null;
}

export interface SyncEventPayload {
  lastSyncAt: string | null;
  error: string | null;
  changedPrIds: string[];
  newEventCount: number;
  unreadCount: number;
}