import type {InventoryItem} from '../types';
import {getBuildTagDefinition} from './buildTags';
import type {InventoryUseEffect} from './inventoryEffects';

const STRUCTURAL_TAG_LABELS: Record<string, string> = {
  weapon: '武器',
  armor: '护甲',
  relic: '遗物',
  material: '材料',
  consumable: '消耗品',
  healing: '疗伤',
  mana: '法力',
  rare: '稀有',
  wuxia: '边城模板',
  xianxia: '灵潮模板',
  neutral: '中性',
};

function dedupeStrings(values: Array<string | null | undefined>) {
  return [...new Set(values.map(value => value?.trim() ?? '').filter(Boolean))];
}

function buildEffectSummaryParts(
  item: InventoryItem,
  useEffect: InventoryUseEffect | null,
) {
  if (useEffect) {
    return [
      useEffect.hpRestore > 0 ? `恢复 ${useEffect.hpRestore} 点气血` : null,
      useEffect.manaRestore > 0 ? `恢复 ${useEffect.manaRestore} 点灵力` : null,
      useEffect.cooldownReduction > 0
        ? `额外推进 ${useEffect.cooldownReduction} 回合冷却`
        : null,
      useEffect.buildBuffs.length > 0
        ? `获得 ${useEffect.buildBuffs.map(buff => buff.name).join('、')}`
        : null,
    ];
  }

  return [
    item.tags.includes('healing') ? '在冒险中恢复生命值' : null,
    item.tags.includes('mana') ? '帮助回转灵力与技能节奏' : null,
    item.tags.includes('weapon') ? '适合进攻型构筑' : null,
    item.tags.includes('armor') ? '适合防御型构筑' : null,
    item.tags.includes('relic') ? '可作为稀有遗物长期携带' : null,
    item.tags.includes('material') ? '可用于制作、锻造或交换' : null,
  ];
}

export function getInventoryTagLabel(tag: string) {
  const normalized = tag.trim();
  if (!normalized) return '';

  const buildTag = getBuildTagDefinition(normalized);
  if (buildTag) {
    return buildTag.label;
  }

  return STRUCTURAL_TAG_LABELS[normalized.toLowerCase()] ?? normalized;
}

export function getInventoryTagLabels(tags: string[]) {
  return dedupeStrings(tags.map(getInventoryTagLabel));
}

export function buildInventoryItemDescription(
  item: InventoryItem,
  useEffect: InventoryUseEffect | null = null,
) {
  if (item.description?.trim()) return item.description.trim();

  const storyFingerprint = item.runtimeMetadata?.storyFingerprint;
  if (storyFingerprint) {
    return [
      storyFingerprint.visibleClue,
      `${storyFingerprint.witnessMark} ${storyFingerprint.unresolvedQuestion}`,
      `它会在此刻出现，是因为${storyFingerprint.currentAppearanceReason}。`,
    ].join(' ');
  }

  const parts = buildEffectSummaryParts(item, useEffect).filter(
    (part): part is string => Boolean(part),
  );

  if (parts.length > 0) {
    return `${item.name} 当前可提供这些作用：${parts.join('，')}。`;
  }

  switch (item.category) {
    case '武器':
      return `${item.name} 更适合作为当前战利品中的主战装备，后续可用于替换现有武器或继续锻造。`;
    case '护甲':
      return `${item.name} 适合用来补足防护与承伤能力，也可留作后续重铸素材。`;
    case '饰品':
    case '稀有品':
    case '专属品':
    case '专属物':
    case '专属物品':
      return `${item.name} 更偏向长期携带与构筑补强，也可能牵出额外线索。`;
    case '材料':
      return `${item.name} 可用于制作、锻造、交易，或为后续掉落组合做准备。`;
    default:
      return `${item.name} 可用于后续路线规划、交易或构筑调整。`;
  }
}