import type {QuestGenerationContext} from '../services/aiTypes';
import type {QuestOpportunity, QuestSceneSnapshot} from '../services/questTypes';
import { buildQuestVisibilitySlice } from '../services/storyEngine/visibilityEngine';

function describeWorld(worldType: QuestGenerationContext['worldType']) {
  switch (worldType) {
    case 'WUXIA':
      return '边城模板';
    case 'XIANXIA':
      return '灵潮模板';
    case 'CUSTOM':
      return '自定义世界';
    default:
      return '未知世界';
  }
}

function summarizeRecentStoryMoments(context: QuestGenerationContext) {
  const moments = context.recentStoryMoments
    .slice(-4)
    .map(moment => `- ${moment.text}`)
    .join('\n');

  return moments || '- 暂无近期剧情记录';
}

function summarizeCurrentQuests(context: QuestGenerationContext) {
  const summary = context.currentQuestSummary?.map(quest =>
    `- ${quest.title}（${quest.status}），发布者 ${quest.issuerNpcId}`,
  ).join('\n');

  return summary || '- 当前没有进行中的任务';
}

function summarizeCompanions(context: QuestGenerationContext) {
  const active = context.activeCompanions?.map(companion => companion.characterId).join('、') || '无';
  const roster = context.rosterCompanions?.map(companion => companion.characterId).join('、') || '无';
  return `当前同行角色：${active}\n队伍名册：${roster}`;
}

function summarizePlayerState(context: QuestGenerationContext) {
  const playerName = context.playerCharacter?.name ?? '未知角色';
  const playerTitle = context.playerCharacter?.title ?? '未知称号';
  const hp = `${context.playerHp ?? 0}/${context.playerMaxHp ?? 0}`;
  const mana = `${context.playerMana ?? 0}/${context.playerMaxMana ?? 0}`;
  const inventory = context.playerInventory?.slice(0, 8).map(item => item.name).join('、') || '无';

  return [
    `玩家：${playerName}（${playerTitle}）`,
    `生命：${hp}`,
    `灵力：${mana}`,
    `背包快照：${inventory}`,
  ].join('\n');
}

function summarizeScene(scene: QuestSceneSnapshot | null, context: QuestGenerationContext) {
  const hostileNpcIds = context.currentSceneHostileNpcIds?.join('、') || '无';
  const treasureHintCount = context.currentSceneTreasureHintCount ?? 0;

  return [
    `场景：${scene?.name ?? context.currentSceneName ?? '未知区域'}`,
    `场景描述：${scene?.description ?? context.currentSceneDescription ?? '暂无'}`,
    `敌对角色 ID：${hostileNpcIds}`,
    `宝藏线索数量：${treasureHintCount}`,
  ].join('\n');
}

function summarizeActiveThreads(context: QuestGenerationContext) {
  if (!context.activeThreadIds?.length) {
    return '暂无明确激活线程';
  }

  const storyGraph = context.customWorldProfile?.storyGraph;
  const labels = context.activeThreadIds.map((threadId) =>
    [...(storyGraph?.visibleThreads ?? []), ...(storyGraph?.hiddenThreads ?? [])]
      .find((thread) => thread.id === threadId)?.title ?? threadId,
  );

  return labels.join('、');
}

function summarizeIssuerNarrativeProfile(context: QuestGenerationContext) {
  const profile = context.issuerNarrativeProfile;
  if (!profile) {
    return '暂无额外叙事档案';
  }

  return [
    `公开面：${profile.publicMask}`,
    `表层线：${profile.visibleLine}`,
    `当前压力：${profile.immediatePressure}`,
    profile.reactionHooks.length > 0
      ? `反应钩子：${profile.reactionHooks.join('、')}`
      : null,
  ]
    .filter(Boolean)
    .join('\n');
}

function summarizeQuestVisibility(context: QuestGenerationContext) {
  const slice = buildQuestVisibilitySlice({
    issuerNarrativeProfile: context.issuerNarrativeProfile,
    activeThreadIds: context.activeThreadIds,
  });

  return [
    `可直接披露：${slice.sayableFactIds.join('、') || '无'}`,
    `只宜写成推测：${slice.inferredFactIds.join('、') || '无'}`,
    `禁止直接说破：${slice.forbiddenFactIds.join('、') || '无'}`,
  ].join('\n');
}

export const QUEST_INTENT_SYSTEM_PROMPT = `你是 AI 原生叙事 RPG 的任务导演。
只返回 JSON，不要输出 Markdown。

输出结构：
{
  "intent": {
    "title": "中文任务标题",
    "description": "中文任务描述",
    "summary": "中文短摘要",
    "narrativeType": "bounty|escort|investigation|retrieval|relationship|trial",
    "dramaticNeed": "string",
    "issuerGoal": "string",
    "playerHook": "string",
    "worldReason": "string",
    "recommendedObjectiveKinds": ["defeat_hostile_npc" | "inspect_treasure" | "spar_with_npc" | "talk_to_npc" | "reach_scene" | "deliver_item"],
    "urgency": "low|medium|high",
    "intimacy": "transactional|cooperative|trust_based",
    "rewardTheme": "currency|resource|relationship|intel|rare_item",
    "followupHooks": ["string"]
  }
}

规则：
- 所有自然语言字段都必须使用中文。
- 任务必须扎根于当前场景、发布者和近期剧情。
- 不要编造奖励、ID、数量、状态或不受支持的规则变化。
- recommendedObjectiveKinds 只是语义建议，不是硬编码结果。
- 优先给出简洁、可玩的任务框架，不要堆砌华丽辞藻。
- title 必须是 4 到 10 个中文字符左右的短任务名，不要写成长句。
- description 解释任务为什么在当前剧情里成立，避免纯规则说明。
- summary 必须是清晰达成条件，优先使用“击败 / 调查 / 返回 / 前往 / 交付 / 切磋”等明确动词，不要写“处理一下”“看看情况”这类模糊表达。`;

export function buildQuestIntentPrompt(params: {
  context: QuestGenerationContext;
  scene: QuestSceneSnapshot | null;
  opportunity: QuestOpportunity;
}) {
  const {context, scene, opportunity} = params;
  const customWorldSummary = context.customWorldProfile
    ? `${context.customWorldProfile.name}: ${context.customWorldProfile.summary}`
    : '无';

  return [
    `世界：${describeWorld(context.worldType)}`,
    `自定义世界摘要：${customWorldSummary}`,
    `发布角色：${context.issuerNpcName ?? '未知'}（${context.issuerNpcId ?? '未知'}）`,
    `发布者身份：${context.issuerNpcContext ?? '暂无'}`,
    `发布者好感：${context.issuerAffinity ?? 0}`,
    `发布者信息揭示阶段：${context.issuerDisclosureStage ?? '未知'}`,
    `发布者亲疏阶段：${context.issuerWarmthStage ?? '未知'}`,
    `当前激活线程：${summarizeActiveThreads(context)}`,
    `发布者叙事档案：\n${summarizeIssuerNarrativeProfile(context)}`,
    `任务可见性切片：\n${summarizeQuestVisibility(context)}`,
    `当前遭遇类型：${context.encounterKind ?? '无'}`,
    summarizeScene(scene, context),
    summarizePlayerState(context),
    summarizeCompanions(context),
    `当前任务机会：${opportunity.reason}`,
    `当前任务列表：\n${summarizeCurrentQuests(context)}`,
    `近期剧情片段：\n${summarizeRecentStoryMoments(context)}`,
    '现在请基于这次具体局势，生成一个自然生长出来的任务意图。',
  ].join('\n\n');
}