import { SentenceRange } from './getSentenceRanges.js';
import '@storyteller-platform/ghost-story';
import '@echogarden/text-segmentation';
import '@storyteller-platform/mapping';

/** A "slot" is a sentence that needs to be synthesised. */
type Slot = {
    chapterId: string;
    id: number;
};
/**
 * Maps a slot to the character length of its sentence text, used to weight
 * how much of a gap's time it should occupy. Keyed by `${chapterId}\0${id}`.
 * Slots missing from this map (or with a non-positive length) fall back to
 * a weight of 1, i.e. even division, same as before this map existed.
 */
type SentenceLengths = Record<string, number>;
declare function slotKey(slot: Slot): string;
/**
 * Given a sequence of sentence ranges from an entire book,
 * ordered by occurrence in audio, interpolates sentence ranges
 * to fill any gaps.
 *
 * A gap may be:
 *   - A non-linearity between two sequential sentence ranges
 *     in the same chapter, e.g. chapter001#0 -> chapter001#3
 *   - A chapter whose sentence ranges start at a number greater
 *     than 0, e.g. chapter001#330 -> chapter002#2
 *   - A chapter whose sentence ranges end at a number lower
 *     than the total number of sentences in that chapter,
 *     e.g. chapter001#325 -> chapter002#0, where
 *     chapterSentenceCounts["chapter001"] === 330
 */
declare function interpolateSentenceRanges(sentenceRanges: SentenceRange[], chapterSentenceCounts: Record<string, number>, audioFileDurations: Record<string, number>, sentenceLengths?: SentenceLengths): SentenceRange[];

export { type SentenceLengths, interpolateSentenceRanges, slotKey };