import 'package:commons_core/commons_core.dart';

import '../i18n/strings.g.dart';

/// Singular + plural label for a [QuantityKind]. For uncountable *vibe* kinds
/// (a few, some…) both are the same word.
(String, String) _unit(Translations t, QuantityKind kind) => switch (kind) {
  QuantityKind.aFew => (t.unit.aFew, t.unit.aFew),
  QuantityKind.some => (t.unit.some, t.unit.some),
  QuantityKind.plenty => (t.unit.plenty, t.unit.plenty),
  QuantityKind.pinch => (t.unit.pinch, t.unit.pinch),
  QuantityKind.handful => (t.unit.handful.singular, t.unit.handful.plural),
  QuantityKind.teaspoon => (t.unit.teaspoon.singular, t.unit.teaspoon.plural),
  QuantityKind.spoon => (t.unit.spoon.singular, t.unit.spoon.plural),
  QuantityKind.cup => (t.unit.cup.singular, t.unit.cup.plural),
  QuantityKind.jar => (t.unit.jar.singular, t.unit.jar.plural),
  QuantityKind.sack => (t.unit.sack.singular, t.unit.sack.plural),
  QuantityKind.packet => (t.unit.packet.singular, t.unit.packet.plural),
  QuantityKind.cob => (t.unit.cob.singular, t.unit.cob.plural),
  QuantityKind.pod => (t.unit.pod.singular, t.unit.pod.plural),
  QuantityKind.ear => (t.unit.ear.singular, t.unit.ear.plural),
  QuantityKind.head => (t.unit.head.singular, t.unit.head.plural),
  QuantityKind.fruit => (t.unit.fruit.singular, t.unit.fruit.plural),
  QuantityKind.bulb => (t.unit.bulb.singular, t.unit.bulb.plural),
  QuantityKind.tuber => (t.unit.tuber.singular, t.unit.tuber.plural),
  QuantityKind.seedHead => (t.unit.seedHead.singular, t.unit.seedHead.plural),
  QuantityKind.bunch => (t.unit.bunch.singular, t.unit.bunch.plural),
  QuantityKind.plant => (t.unit.plant.singular, t.unit.plant.plural),
  QuantityKind.pot => (t.unit.pot.singular, t.unit.pot.plural),
  QuantityKind.tray => (t.unit.tray.singular, t.unit.tray.plural),
  QuantityKind.seedling => (t.unit.seedling.singular, t.unit.seedling.plural),
  QuantityKind.tree => (t.unit.tree.singular, t.unit.tree.plural),
  QuantityKind.cutting => (t.unit.cutting.singular, t.unit.cutting.plural),
  QuantityKind.grams => (t.unit.grams.singular, t.unit.grams.plural),
  QuantityKind.count => (t.unit.count.singular, t.unit.count.plural),
};

/// The unit's singular name — for chips/scale items ("cob", "packet").
String unitLabel(Translations t, QuantityKind kind) => _unit(t, kind).$1;

/// A full, human quantity: "3 cobs", "2 packets", "a few".
String quantityDisplay(Translations t, Quantity q) {
  final n = q.count;
  final (one, other) = _unit(t, q.kind);
  if (!q.kind.countable || n == null) {
    // Vibe amount, or a countable unit with no number → bare unit name.
    return (n != null && n != 1) ? other : one;
  }
  return '${_formatCount(n)} ${n == 1 ? one : other}';
}

String _formatCount(num n) =>
    n == n.roundToDouble() ? n.toInt().toString() : n.toString();