"use strict";

const GROUND_TYPE_ORDER = Object.freeze(["soil", "dirt", "concrete", "blanket", "foot_massage", "ice"]);
const GROUND_TYPES = Object.freeze({
  // 既存セーブとの互換性のため、デフォルトIDは soil のままにし、表示名だけ「砂」にする。
  soil: Object.freeze({ id: "soil", label: "砂", description: "普通の地面。", stressMultiplier: 1.0, grassMultiplier: 1.0, grassGrowthMultiplier: 1.0 }),
  dirt: Object.freeze({ id: "dirt", label: "土", description: "草がよく育つ地面。", stressMultiplier: 1.0, grassMultiplier: 1.75, grassGrowthMultiplier: 2.45 }),
  concrete: Object.freeze({ id: "concrete", label: "コンクリート", description: "草が生えない", stressMultiplier: 1.0, grassMultiplier: 0.0, grassGrowthMultiplier: 0.0, grassLimit: 0 }),
  blanket: Object.freeze({ id: "blanket", label: "ふわふわ毛布", description: "ストレスが増えにくい", stressMultiplier: 0.5, grassMultiplier: 1.0, grassGrowthMultiplier: 1.0 }),
  foot_massage: Object.freeze({ id: "foot_massage", label: "足つぼ", description: "青いまだら地面。ストレスが増えやすい", stressMultiplier: 1.5, grassMultiplier: 1.0, grassGrowthMultiplier: 1.0 }),
  ice: Object.freeze({ id: "ice", label: "氷", description: "つるつる滑る。草は生えにくい", stressMultiplier: 1.1, grassMultiplier: 0.15, grassGrowthMultiplier: 0.35 }),
});

function groundDefinition(id = "soil") {
  return GROUND_TYPES[id] || GROUND_TYPES.soil;
}

function groundExists(id = "soil") {
  return Boolean(GROUND_TYPES[id]);
}

function groundLabel(id = "soil") {
  return groundDefinition(id).label || "砂";
}

function groundDescription(id = "soil") {
  return groundDefinition(id).description || "";
}

function normalizedGroundStressMultiplier(id = "soil") {
  const mult = Number(groundDefinition(id).stressMultiplier);
  return Number.isFinite(mult) && mult > 0 ? mult : 1;
}

function normalizedGroundGrassMultiplier(id = "soil") {
  const mult = Number(groundDefinition(id).grassMultiplier);
  return Number.isFinite(mult) && mult >= 0 ? mult : 1;
}

function normalizedGroundGrassGrowthMultiplier(id = "soil") {
  const def = groundDefinition(id);
  const mult = Number(def.grassGrowthMultiplier ?? def.grassMultiplier);
  return Number.isFinite(mult) && mult >= 0 ? mult : 1;
}

function groundLimitForField(fieldType = "garden") {
  const config = typeof CONFIG !== "undefined" ? CONFIG : null;
  const byField = config?.grassLimitsByField || { cage: 19, garden: 99, park: 299 };
  const fieldLimit = byField[fieldType || "garden"];
  return Number(Number.isFinite(fieldLimit) ? fieldLimit : (config?.grassLimit ?? 99));
}

function groundGrassLimit(id = "soil", fieldType = "garden") {
  const def = groundDefinition(id);
  if (Number.isFinite(def.grassLimit)) return Math.max(0, Math.floor(Number(def.grassLimit)));
  const mult = normalizedGroundGrassMultiplier(def.id);
  if (mult <= 0) return 0;
  const limit = groundLimitForField(fieldType) * mult;
  return Number.isFinite(limit) && limit >= 0 ? Math.floor(limit) : Infinity;
}

function nextGroundTypeId(current = "soil") {
  const index = GROUND_TYPE_ORDER.indexOf(current || "soil");
  return GROUND_TYPE_ORDER[(index + 1 + GROUND_TYPE_ORDER.length) % GROUND_TYPE_ORDER.length] || "soil";
}

function groundTooltipText(id = "soil") {
  const def = groundDefinition(id);
  const desc = def.description || "クリックで切り替え";
  return `${def.label || "じめん"}\n${desc}`;
}

window.TarinaiGround = Object.freeze({
  definitions: GROUND_TYPES,
  order: GROUND_TYPE_ORDER,
  definition: groundDefinition,
  exists: groundExists,
  label: groundLabel,
  description: groundDescription,
  stressMultiplier: normalizedGroundStressMultiplier,
  grassMultiplier: normalizedGroundGrassMultiplier,
  grassGrowthMultiplier: normalizedGroundGrassGrowthMultiplier,
  grassLimit: groundGrassLimit,
  nextId: nextGroundTypeId,
  tooltipText: groundTooltipText,
});