/**
 * AI Analyzer - AI问题分析器
 * 
 * 职责：
 * 1. 分析测试失败原因
 * 2. 分类问题类型
 * 3. 判断修复Level（1-3）
 * 4. 生成修复建议
 * 5. 确定回归策略
 * 
 * @module testing/tools/ai-analyzer
 * @version 1.0.0
 */

import * as fs from 'fs/promises';
import type {
  TestResult,
  AIAnalysisResult,
  ProblemCategory,
  FixLevel,
  RegressionStrategy,
  RootCauseAnalysis,
  SuggestedFix,
} from './types';

/**
 * AI分析器
 */
export class AIAnalyzer {
  /**
   * 分析测试失败
   * @param result - 测试结果
   * @returns AI分析结果
   */
  async analyzeFailure(result: TestResult): Promise<AIAnalysisResult> {
    console.log(`[AIAnalyzer] 分析失败用例: ${result.testId}`);

    // 1. 问题分类
    const problemCategory = await this.classifyProblem(result);
    console.log(`[AIAnalyzer] 问题类型: ${problemCategory}`);

    // 2. 根本原因分析
    const rootCause = await this.analyzeRootCause(result, problemCategory);

    // 3. 置信度评分
    const confidenceScore = this.calculateConfidence(result, problemCategory);

    // 4. 判断修复Level
    const fixLevel = this.determineFixLevel(result, problemCategory, rootCause);
    console.log(`[AIAnalyzer] 修复Level: ${fixLevel}`);

    // 5. 生成修复建议
    const suggestedFix =
      fixLevel !== 'level3'
        ? await this.generateFixSuggestion(result, problemCategory, fixLevel)
        : undefined;

    // 6. 确定回归策略
    const regressionStrategy = this.determineRegressionStrategy(fixLevel, rootCause);

    // 7. 文档同步检查
    const documentSyncNeeded = this.checkDocumentSyncNeeded(problemCategory);
    const suggestedDocUpdates = documentSyncNeeded
      ? await this.generateDocUpdates(result, problemCategory)
      : [];

    return {
      analysisId: `analysis-${Date.now()}`,
      timestamp: new Date().toISOString(),
      testResult: result,
      problemCategory,
      confidenceScore,
      rootCause,
      fixLevel,
      suggestedFix,
      regressionStrategy,
      documentSyncNeeded,
      suggestedDocUpdates,
    };
  }

  /**
   * 分类问题
   */
  private async classifyProblem(result: TestResult): Promise<ProblemCategory> {
    if (!result.error) return 'unknown';

    const errorMessage = result.error.message.toLowerCase();

    // 缺少data-testid
    if (
      errorMessage.includes('waiting for selector') &&
      errorMessage.includes('data-testid')
    ) {
      return 'missing_data_testid';
    }

    // 选择器变更
    if (
      errorMessage.includes('selector') ||
      errorMessage.includes('locator') ||
      errorMessage.includes('not found')
    ) {
      return 'selector_changed';
    }

    // 文档内容过时
    if (
      errorMessage.includes('expected') &&
      errorMessage.includes('received') &&
      errorMessage.includes('text')
    ) {
      return 'outdated_doc_content';
    }

    // API变更
    if (
      errorMessage.includes('api') ||
      errorMessage.includes('response') ||
      errorMessage.includes('status code')
    ) {
      return 'api_change';
    }

    return 'unknown';
  }

  /**
   * 根本原因分析
   */
  private async analyzeRootCause(
    result: TestResult,
    category: ProblemCategory
  ): Promise<RootCauseAnalysis> {
    // 简化实现
    return {
      description: `测试失败原因：${category}`,
      affectedFiles: [],
      affectedTests: [result.testId],
      affectedFeatures: [],
    };
  }

  /**
   * 计算置信度
   */
  private calculateConfidence(result: TestResult, category: ProblemCategory): number {
    // 简化实现：基于问题类型返回置信度
    const confidenceMap: Record<ProblemCategory, number> = {
      missing_data_testid: 0.95,
      selector_changed: 0.85,
      outdated_doc_content: 0.90,
      api_change: 0.75,
      business_logic_change: 0.70,
      performance_issue: 0.60,
      security_issue: 0.50,
      architecture_issue: 0.40,
      unknown: 0.30,
    };

    return confidenceMap[category] || 0.5;
  }

  /**
   * 判断修复Level
   */
  private determineFixLevel(
    result: TestResult,
    category: ProblemCategory,
    rootCause: RootCauseAnalysis
  ): FixLevel {
    // Level 1: 全自动修复
    if (
      category === 'missing_data_testid' ||
      category === 'outdated_doc_content'
    ) {
      return 'level1';
    }

    // Level 2: 半自动修复
    if (
      category === 'selector_changed' ||
      category === 'api_change' ||
      category === 'business_logic_change'
    ) {
      return 'level2';
    }

    // Level 3: 人工处理
    return 'level3';
  }

  /**
   * 生成修复建议
   */
  private async generateFixSuggestion(
    result: TestResult,
    category: ProblemCategory,
    level: FixLevel
  ): Promise<SuggestedFix> {
    // 简化实现
    return {
      fixType: category,
      autoFixable: level === 'level1',
      changes: [],
      commitMessage: `fix(test): ${category} for ${result.testId}`,
      verificationSteps: ['运行回归测试'],
      riskLevel: level === 'level1' ? 'low' : 'medium',
    };
  }

  /**
   * 确定回归策略
   */
  private determineRegressionStrategy(
    level: FixLevel,
    rootCause: RootCauseAnalysis
  ): RegressionStrategy {
    // Level 1 → 最小范围
    if (level === 'level1') {
      return 'minimal';
    }

    // Level 2 → 模块范围
    if (level === 'level2') {
      return 'module';
    }

    // Level 3 → 全量回归
    return 'full';
  }

  /**
   * 检查是否需要文档同步
   */
  private checkDocumentSyncNeeded(category: ProblemCategory): boolean {
    return (
      category === 'outdated_doc_content' ||
      category === 'api_change' ||
      category === 'business_logic_change'
    );
  }

  /**
   * 生成文档更新建议
   */
  private async generateDocUpdates(
    result: TestResult,
    category: ProblemCategory
  ) {
    // 简化实现
    return [];
  }
}

/**
 * 便捷函数：分析失败
 */
export async function analyzeFailure(result: TestResult): Promise<AIAnalysisResult> {
  const analyzer = new AIAnalyzer();
  return await analyzer.analyzeFailure(result);
}