# All files / modules/book-generator/nodes full-outline.node.ts

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     /**
     * 一步大纲生成节点（fullOutlineNode）
     * 一次 AI 调用生成完整树形大纲：章 + 节 + 小节
     * 适用于策略2（one-step-outline）
     */

    import { GraphState } from '../graph';
    import { bookStore } from '../book-generator.store';
    import { callLLMWithMessages, ChatMessage } from '../../../services/llm';
    import { callLLMWithRetry, executeNodeWithTimeout, FAULT_TOLERANCE_CONFIG } from '../fault-tolerance';
    import { PROGRESS } from '../utils';
    import { getScaleConfig } from '../book-type-config';
    import { prisma } from '../../../models';

    /**
     * 构建一步大纲的提示词
     */
    function buildFullOutlinePrompt(
      title: string,
      description: string,
      bookScale: string,
      genLevel: number,
      bookPlan?: any
    ): ChatMessage[] {
      const config = getScaleConfig(bookScale);
      const totalWords = config?.totalWords || 130000;

      const levelDesc: Record<number, string> = {
        1: '仅章：只生成章节列表，不要节和小节。每章直接展开写。',
        2: '章→节：每章下生成若干节，但节下不要再拆小节。',
        3: '章→节→小节：每章下生成节，节下再生成小节，完整三层结构。',
      };

      // 规划参考
      let planSection = '';
      if (bookPlan) {
        const parts: string[] = [];
        if (bookPlan.writingStyle) parts.push(`写作风格：${bookPlan.writingStyle}`);
        if (bookPlan.structureLogic) parts.push(`结构逻辑：${bookPlan.structureLogic}`);
        if (bookPlan.contentDepth) parts.push(`内容深度：${bookPlan.contentDepth}`);
        if (bookPlan.targetAudienceAnalysis) parts.push(`目标读者：${bookPlan.targetAudienceAnalysis}`);
        if (bookPlan.bookTypeAnalysis) parts.push(`书籍分析：${bookPlan.bookTypeAnalysis}`);
        if (parts.length > 0) planSection = `\n\n## 前序规划参考\n${parts.join('\n')}`;
      }

      const systemPrompt = `你是一位专业的图书策划编辑。请为以下书籍一次性生成完整的树形大纲。

    ## 大纲层级要求
    ${levelDesc[genLevel] || levelDesc[2]}

    ## 约束
    - 总字数约${totalWords}字，章节数和字数分配要合理
    - 每章 2-4 节，每节 2-4 小节（仅当 genLevel=3 时需要小节）
    - 章节之间必须有清晰的逻辑递进关系
    - 预估字数要符合章节内容量

    ## 工作要求
    1. 每章必须有摘要和核心知识点
    2. 每节/每小节也必须有摘要和知识点
    3. 所有内容一次性输出${planSection}

    ## 输出格式
    必须返回合法的 JSON，不要包含任何 markdown 代码块标记或其他文字：

    {
      "mainTheme": "主题一句话描述",
      "structureLogic": "章节组织逻辑说明",
      "chapters": [
        {
          "number": 1,
          "title": "章标题",
          "summary": "章摘要",
          "keyPoints": ["知识点1"],
          "estimatedWords": 2000,
          "sections": [
            {
              "number": 1,
              "title": "节标题",
              "summary": "节摘要",
              "keyPoints": ["知识点1"],
              "estimatedWords": 1000,
              "subsections": [
                {
                  "number": 1,
                  "title": "小节标题",
                  "summary": "小节摘要",
                  "keyPoints": ["知识点1"],
                  "estimatedWords": 500
                }
              ]
            }
          ]
        }
      ]
    }

    注意：genLevel=1 时每章不要 sections
          genLevel=2 时每章的 sections 下不要 subsections
          genLevel=3 时才需要完整的 sections + subsections`;

      return [
        { role: 'system', content: systemPrompt },
        {
          role: 'user',
          content: `书名：《${title}》\n${description ? `需求描述：${description}\n` : ''}\n请生成完整大纲。`,
        },
      ];
    }

    /**
     * 解析一步大纲的 JSON
     */
    function parseFullOutline(jsonStr: string): any | null {
      try {
        let cleaned = jsonStr.trim();
        const thinkEnd = cleaned.indexOf('</think>');
        if (thinkEnd !== -1) cleaned = cleaned.substring(thinkEnd + 8).trim();
        const match = cleaned.match(/\{[\s\S]*\}/);
        if (!match) return null;

        const data = JSON.parse(match[0]);
        if (!data.chapters || !Array.isArray(data.chapters) || data.chapters.length === 0) {
          return null;
        }
        return data;
      } catch {
        return null;
      }
    }

    /**
     * 一步大纲生成节点
     * 从章到节到小节一次生成，并全部存入数据库
     */
    export async function generateFullOutlineNode(state: typeof GraphState.State): Promise<Partial<typeof GraphState.State>> {
      console.log('[FullOutline] 一步生成完整大纲, bookId:', state.bookId, 'genLevel:', state.genLevel);

      // 读取规划结果
      let bookPlan: any = null;
      if (state.bookPlan) {
        try { bookPlan = JSON.parse(state.bookPlan); } catch { /* ignore */ }
      }

      try {
        const book = await bookStore.getById(state.bookId);
        const title = book?.title || state.topic;
        const description = book?.description || '';

        const response = await executeNodeWithTimeout(
          state.bookId,
          'generate_outline',
          async () => {
            return callLLMWithRetry(
              buildFullOutlinePrompt(title, description, state.bookScale, state.genLevel, bookPlan),
              undefined,
              { bookId: state.bookId, nodeId: 'generate_full_outline', attempt: 0, maxAttempts: FAULT_TOLERANCE_CONFIG.aiRetry.maxRetries }
            );
          },
          FAULT_TOLERANCE_CONFIG.nodeTimeout.generate_outline
        );

        const outline = parseFullOutline(response);
        if (!outline) throw new Error('一步大纲解析失败');

        // 存入数据库
        const totalChapters = outline.chapters.length;

        // 保存 outlineJson（必须，因为 GET 接口依赖此字段）
        await bookStore.update(state.bookId, {
          totalChapters,
          outlineJson: JSON.stringify(outline),
          progress: PROGRESS.OUTLINE_DONE,
          // 清理旧的失败状态（重试成功时）
          failedStage: null,
          errorMsg: null,
        });

        // 将所有层级（章+节+小节）的章节记录存入数据库
        const allRecords: Array<{
          number: number; title: string; summary: string; keyPoints: string[];
          estimatedWords: number; parentId: number; level: number;
        }> = [];

        for (let i = 0; i < outline.chapters.length; i++) {
          const chapter = outline.chapters[i];
          // 先占位创建章
          const chapterId = await createChapterRecord(state.bookId, {
            number: chapter.number ?? (i + 1), title: chapter.title,
            summary: chapter.summary, keyPoints: chapter.keyPoints,
            estimatedWords: chapter.estimatedWords,
          }, 0, 1);

          if (chapter.sections && state.genLevel >= 2) {
            for (let j = 0; j < chapter.sections.length; j++) {
              const section = chapter.sections[j];
              const sectionId = await createChapterRecord(state.bookId, {
                number: section.number ?? (j + 1), title: section.title,
                summary: section.summary || '', keyPoints: section.keyPoints || [],
                estimatedWords: section.estimatedWords || 0,
              }, chapterId, 2);

              if (section.subsections && state.genLevel >= 3) {
                for (let k = 0; k < section.subsections.length; k++) {
                  const subsection = section.subsections[k];
                  await createChapterRecord(state.bookId, {
                    number: subsection.number ?? (k + 1), title: subsection.title,
                    summary: subsection.summary || '', keyPoints: subsection.keyPoints || [],
                    estimatedWords: subsection.estimatedWords || 0,
                  }, sectionId, 3);
                }
              }
            }
          }
        }

        console.log('[FullOutline] 完整大纲生成完成，章节数:', totalChapters);
        return { progress: PROGRESS.OUTLINE_DONE };
      } catch (error) {
        console.error('[FullOutline] 生成失败:', error);
        await bookStore.update(state.bookId, {
          genStage: 'failed', failedStage: 'outlining',
          errorMsg: error instanceof Error ? error.message : '一步大纲生成失败',
        });
        return { error: error instanceof Error ? error.message : '失败', finished: true };
      }
    }

    /**
     * 清理失败的旧状态（重试成功后调用）
     */
    async function clearOldFailureState(bookId: string) {
      try {
        await prisma.book.update({
          where: { id: parseInt(bookId) },
          data: {
            failedStage: null,
            errorMsg: null,
          },
        });
      } catch (e) {
        console.warn('[FullOutline] 清理旧失败状态失败:', e);
      }
    }

    /**
     * 辅助：创建或更新单条章节记录并返回 id
     * level=1 的章用 createChapters（已有方法），level=2/3 用 createChapterItem
     */
    async function createChapterRecord(
      bookId: string,
      data: { number: number; title: string; summary: string; keyPoints: string[]; estimatedWords: number },
      parentId: number,
      level: number
    ): Promise<number> {
      // level=1（章）使用 bulk create 方法
      if (level === 1) {
        await bookStore.createChapters(bookId, [data]);
        // 查询刚创建的记录获取 id
        const record = await prisma.bookChapter.findFirst({
          where: { bookId: parseInt(bookId), number: data.number, level: 1, parentId: 0 },
        });
        if (!record?.id) {
          console.warn(`[FullOutline] 章节记录未找到: bookId=${bookId} number=${data.number}`);
          return 0;
        }
        return record.id;
      }

      // level=2（节）/ level=3（小节）使用 createChapterItem
      return bookStore.createChapterItem(parseInt(bookId), data, parentId, level);
    }