import type { ReviewState, ReviewerVerdict } from '../shared/types.js';
import type { ListPr } from './github/queries.js';

export function deriveReviewState(pr: ListPr): {
  reviewState: ReviewState;
  unresolvedThreads: number;
  totalThreads: number;
} {
  const totalThreads = pr.reviewThreads.totalCount;
  const unresolvedThreads = pr.reviewThreads.nodes.filter((t) => !t.isResolved).length;
  let reviewState: ReviewState;
  if (pr.reviews.totalCount === 0 && totalThreads === 0) reviewState = 'no_review';
  else if (unresolvedThreads > 0) reviewState = 'outstanding';
  else reviewState = 'addressed';
  return { reviewState, unresolvedThreads, totalThreads };
}

export function deriveVerdicts(pr: ListPr): ReviewerVerdict[] {
  const author = pr.author?.login;
  return pr.latestReviews.nodes
    .filter(
      (r): r is typeof r & { state: 'APPROVED' | 'CHANGES_REQUESTED' } =>
        (r.state === 'APPROVED' || r.state === 'CHANGES_REQUESTED') &&
        r.author?.login !== undefined &&
        r.author.login !== author,
    )
    .map((r) => ({
      reviewer: r.author!.login,
      state: r.state,
      url: r.url,
      submittedAt: r.submittedAt,
    }));
}