/**
 * Makes youth teams identifiable while retaining the team name supplied by
 * click-TT. Age groups occur in a few forms, for example "Jugend 13",
 * "Jugend 13 1. Kreisklasse", and "J13". Some imports provide the age
 * only for the whole fixture, therefore `competitionAgeGroup` is considered
 * as a fallback.
 */
export function youthTeamCode(teamAgeGroup, teamName = '', competitionAgeGroup = '') {
  const ageGroup = [teamAgeGroup, competitionAgeGroup]
    .map(value => String(value || '').trim())
    .filter(Boolean)
    .join(' ')
  const name = String(teamName || '').trim()
  const codeMatch = `${ageGroup} ${name}`.match(/\b(?:jugend\s*|j\s*\(?)(\d{1,2})\b/i)

  if (codeMatch) return `J${codeMatch[1]}`
  if (/\bjugend\b/i.test(ageGroup) || /\bjugend\b/i.test(name)) return 'J'
  return ''
}

export function formatTeamDisplayName(teamName, teamAgeGroup, competitionAgeGroup = '') {
  const rawName = String(teamName || '').trim()
  if (!rawName) return ''

  const youthCode = youthTeamCode(teamAgeGroup, rawName, competitionAgeGroup)
  const name = youthCode
    ? rawName.replace(/\s*\(J\d{1,2}\)\s*$/i, '').trim()
    : rawName
  return youthCode ? `(${youthCode}) ${name}` : name
}