// Turns a chunk's study notes into a starting script outline for a talk or episode.
const has = (s) => (s ?? '').trim().length > 0;

export function buildScriptDraft(chunk, reference) {
  const title = [chunk.episodeNumber, chunk.episodeTitle].filter(has).join(': ');
  const words = (chunk.greekWords ?? [])
    .filter((w) => w.lexeme || w.transliteration)
    .map((w) => `• ${[w.lexeme, w.transliteration && `(${w.transliteration})`].filter(Boolean).join(' ')}${w.englishGloss || w.shortDefinition ? ` — ${w.englishGloss || w.shortDefinition}` : ''}`);
  const section = (heading, body) => `${heading}\n${has(body) ? body.trim() : '[…]'}`;
  return [
    title || reference,
    title ? reference : null,
    '',
    section('OPENING', ''),
    '',
    section('WHAT THE TEXT SAYS', chunk.observation),
    '',
    section('WHAT IT MEANS', chunk.interpretation),
    ...(words.length ? ['', 'KEY WORDS', ...words] : []),
    '',
    section('WHAT IT MEANS FOR US', chunk.application),
    '',
    section('CLOSING', ''),
  ].filter((line) => line !== null).join('\n');
}

export const wordCount = (s) => (s ?? '').trim().split(/\s+/).filter(Boolean).length;
// Speaking pace for the time estimate: about 150 words a minute.
export const spokenMinutes = (s) => Math.round((wordCount(s) / 150) * 10) / 10;