export function frameworkSkillSummaryKey(id) {
  return `framework_program:${id}`
}

export function moduleSkillSummaryKey(id) {
  return `training_module:${id}`
}

export function skillEntryFromSummary(summary, skillId) {
  if (!summary?.skills) return null
  return summary.skills.find((s) => String(s.skill_id) === String(skillId)) || null
}

export function maxSelectedSkillClubPercent(summary, skillIds = []) {
  if (!summary || !skillIds.length) return null
  let max = null
  for (const id of skillIds) {
    const sk = skillEntryFromSummary(summary, id)
    if (!sk) continue
    const pct = sk.universal_percent
    if (pct == null) continue
    if (max == null || pct > max) max = pct
  }
  return max
}

export function formatClubPercent(value) {
  if (value == null || !Number.isFinite(Number(value))) return '—'
  const n = Number(value)
  return n % 1 === 0 ? `${n}%` : `${n.toFixed(1)}%`
}

export function artifactTypeLabel(type) {
  if (type === 'framework_program') return 'Rahmenprogramm'
  if (type === 'training_module') return 'Modul'
  if (type === 'progression_graph') return 'Regressionspfad'
  return type || 'Artefakt'
}

export function artifactPath(ref) {
  if (!ref) return null
  if (ref.artifact_type === 'framework_program') {
    return `/planning/framework-programs/${ref.artifact_id}`
  }
  if (ref.artifact_type === 'training_module') {
    return `/planning/training-modules/${ref.artifact_id}`
  }
  return null
}

/** Zeilen für Kompakt-Anzeige: gewählte Fähigkeiten oder Top je Kategorie. */
export function compactSkillDisplayRows(summary, { skillIds = [], limit = 6 } = {}) {
  if (!summary) return []
  if (skillIds.length) {
    return skillIds
      .map((id) => skillEntryFromSummary(summary, id))
      .filter(Boolean)
      .sort((a, b) => (b.universal_percent ?? 0) - (a.universal_percent ?? 0))
      .slice(0, limit)
  }
  return (summary.top_by_category || []).slice(0, limit)
}