/** Effektives Ablaufprofil für Kombination im Coach/in der Planung */

/**
 * Vereinigt slot_profiles_v1 aus Katalog und Planungs-Overlay (je slot_index).
 * @param {unknown} catArr
 * @param {unknown} planArr
 */
function mergeSlotProfilesV1(catArr, planArr) {
  const c = Array.isArray(catArr) ? catArr : []
  const p = Array.isArray(planArr) ? planArr : []
  const byIx = new Map()
  for (const r of c) {
    if (!r || typeof r !== 'object') continue
    const ix = Number(r.slot_index)
    if (!Number.isFinite(ix)) continue
    byIx.set(ix, { ...r })
  }
  for (const r of p) {
    if (!r || typeof r !== 'object') continue
    const ix = Number(r.slot_index)
    if (!Number.isFinite(ix)) continue
    const prev = byIx.get(ix) || {}
    byIx.set(ix, { ...prev, ...r })
  }
  return [...byIx.entries()].sort((a, b) => a[0] - b[0]).map(([, row]) => row)
}

/**
 * Katalog-Basis + optionaler Planungs-Snapshot.
 * Wichtig: `planning_method_profile` darf nur **Überschreibungen** sein — nie den Katalog komplett ersetzen
 * (sonst verschwinden Zeiten/Runden bei leerem Objekt oder Teil-Payload).
 */
export function effectiveComboMethodProfile(catalogDict, planningSnapshot) {
  const cat =
    catalogDict && typeof catalogDict === 'object' && !Array.isArray(catalogDict) ? { ...catalogDict } : {}

  if (
    planningSnapshot === null ||
    planningSnapshot === undefined ||
    typeof planningSnapshot !== 'object' ||
    Array.isArray(planningSnapshot)
  ) {
    return { ...cat }
  }

  const plan = planningSnapshot
  const merged = { ...cat, ...plan }

  if (Object.prototype.hasOwnProperty.call(plan, 'slot_profiles_v1')) {
    merged.slot_profiles_v1 = mergeSlotProfilesV1(cat.slot_profiles_v1, plan.slot_profiles_v1)
  }

  return merged
}

export function comboPlanningProfileJsonForEditor(catalogDict, planningSnapshot) {
  const o = effectiveComboMethodProfile(catalogDict, planningSnapshot)
  try {
    return JSON.stringify(Object.keys(o).length ? o : {})
  } catch {
    return '{}'
  }
}