# All files / modules/book-generator/parsers outline.parser.ts

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     /**
     * 大纲解析器
     * 容错解析LLM返回的大纲JSON
     */

    export interface OutlineData {
      mainTheme: string;
      structureLogic: string;
      recommendSubsections?: boolean;
      chapters: Array<{
        number: number;
        title: string;
        summary: string;
        keyPoints: string[];
        estimatedWords: number;
      }>;
    }

    export function parseOutline(jsonStr: string): OutlineData | null {
      if (!jsonStr || typeof jsonStr !== 'string') {
        console.error('[OutlineParser] 输入为空或非字符串');
        return null;
      }

      try {
        let data: any;

        // 策略1：直接解析（最理想情况，LLM 直接输出纯 JSON）
        let cleanedStr = jsonStr.trim();

        // 清理思考标签
        cleanedStr = cleanedStr.replace(/^[\s\S]*?<\/?blockquote>[\s\S]*/gi, '');
        const thinkEndIdx = cleanedStr.indexOf('</think>');
        if (thinkEndIdx !== -1) {
          cleanedStr = cleanedStr.substring(thinkEndIdx + 8).trim();
        }

        try {
          data = JSON.parse(cleanedStr);
        } catch {
          // 策略2：提取 JSON 对象（处理 LLM 加了 markdown 标记或多余文字）
          const match = cleanedStr.match(/\{[\s\S]*\}/);
          if (!match) {
            console.error('[OutlineParser] 未找到 JSON 对象');
            return null;
          }
          try {
            data = JSON.parse(match[0]);
          } catch (parseErr) {
            console.error('[OutlineParser] JSON 解析失败:', parseErr);
            return null;
          }
        }

        // 验证必要字段
        if (!data || typeof data !== 'object') {
          console.error('[OutlineParser] 解析结果非对象');
          return null;
        }
        if (!Array.isArray(data.chapters)) {
          console.error('[OutlineParser] chapters 字段缺失或非数组');
          // 尝试兼容：若顶层就是章节数组
          if (Array.isArray(data)) {
            data = { chapters: data };
          } else {
            return null;
          }
        }

        return {
          mainTheme: data.mainTheme || '主题待定',
          structureLogic: data.structureLogic || '由浅入深',
          recommendSubsections: data.recommendSubsections === true,
          chapters: data.chapters.map((c: any, i: number) => ({
            number: c.number || i + 1,
            title: c.title || `第${i + 1}章`,
            summary: typeof c.summary === 'string' ? c.summary : '',
            keyPoints: Array.isArray(c.keyPoints) ? c.keyPoints : [],
            estimatedWords: typeof c.estimatedWords === 'number' ? c.estimatedWords : 1000,
          })),
        };
      } catch (err) {
        console.error('[OutlineParser] 未知错误:', err);
        return null;
      }
    }