export interface DoneState {
  checksGreen: boolean;
  mutatedSource: boolean;
  mutatedTest: boolean;
  noticedMissingTest: boolean;
}

export const MISSING_TEST_NOTICE_TYPE = 'sideroom-missing-test-notice';

const TEST_DIRECTORY = /(?:^|\/)(?:__tests__|tests?|specs?)(?:\/|$)/;

const TEST_FILE =
  /(?:^|\/)(?:test_[\w.-]*\.py|[\w.-]*[._](?:test|spec)\.[\w.-]+|[\w.-]*(?:Test|Tests)\.java)$/;

const SOURCE_FILE = /\.(?:[cm]?js|jsx|ts|tsx|go|java|php|py|rs)$/i;

export function createDoneState(): DoneState {
  return {
    checksGreen: false,
    mutatedSource: false,
    mutatedTest: false,
    noticedMissingTest: false,
  };
}

export function resetDoneRun(state: DoneState): void {
  state.checksGreen = false;
  state.mutatedSource = false;
  state.mutatedTest = false;
  state.noticedMissingTest = false;
}

export function isTestPath(path: string): boolean {
  const normalized = path.replaceAll('\\', '/');
  return TEST_DIRECTORY.test(normalized) || TEST_FILE.test(normalized);
}

export function isSourcePath(path: string): boolean {
  const normalized = path.replaceAll('\\', '/');
  return SOURCE_FILE.test(normalized);
}

export function shouldNoticeMissingTest(
  state: DoneState,
  hasTests: boolean,
): boolean {
  return (
    hasTests &&
    state.mutatedSource &&
    !state.mutatedTest &&
    !state.noticedMissingTest
  );
}

export function formatMissingTestNotice(): string {
  return 'This run changed code files and no test file. Check whether existing tests cover the changed behavior; add or update a test if coverage is missing, reuse relevant checks that already passed after the latest mutation, and run missing, failed, or stale checks before finishing. Any code or test edit makes earlier checks stale.';
}