import { HttpError } from '../services/HttpService';

/** Why the server keeps a stored file closed until its malware scan clears it. */
export type ScanHold = 'held' | 'blocked' | 'unscannable';

/** The scan state a refusal carries, or undefined when the refusal is about something else. */
export const scanHoldOf = (error: unknown): ScanHold | undefined => {
    if (!(error instanceof HttpError) || error.status !== 409) return undefined;
    const document = (error.body as { document?: unknown } | null | undefined)?.document;
    return document === 'held' || document === 'blocked' || document === 'unscannable' ? document : undefined;
};

/** Said in place of a file that will not open yet, or at all. */
export const SCAN_HOLD_WORDS: Record<ScanHold, string> = {
    held: 'This file is still being checked for viruses. Try again in a minute.',
    blocked: 'This file failed its virus check, so it stays closed.',
    unscannable: 'This file could not be checked for viruses, so it stays closed.',
};

/** Said in place of a file that was put inside a record before files were checked, so it is never opened. */
export const PRE_SCAN_FILE_WORDS = 'This file was sent before files were checked for viruses, so it stays closed. Ask for it to be sent again.';

/** Said when a submission cannot be attached because one of its files will not open. */
export const SUBMISSION_SCAN_HOLD_WORDS: Record<ScanHold, string> = {
    held: 'A file on this submission is still being checked for viruses. Try again in a minute. Nothing was written to the record.',
    blocked: 'A file on this submission failed its virus check, so the submission cannot be attached. Nothing was written to the record.',
    unscannable: 'A file on this submission could not be checked for viruses, so the submission cannot be attached. Nothing was written to the record.',
};