/**
 * ╔═══════════════════════════════════════════════════════════════════════════╗
 * ║                    ERROR DATABASE INGESTOR                                 ║
 * ║═══════════════════════════════════════════════════════════════════════════║
 * ║  Henter fejlmønstre fra GitHub, HuggingFace, og andre kilder              ║
 * ║  Bruges til at træne SelfHealer                                           ║
 * ╚═══════════════════════════════════════════════════════════════════════════╝
 */

import { logger } from '../../utils/logger.js';
import { errorKnowledgeBase, type ErrorPattern, type ErrorSource, type ErrorCategory } from '../ErrorKnowledgeBase.js';
import { withRetry, isRetryableError } from '../../utils/resilience.js';

const log = logger.child({ module: 'ErrorDatabaseIngestor' });

// ═══════════════════════════════════════════════════════════════════════════
// EXTERNAL SOURCE DEFINITIONS
// ═══════════════════════════════════════════════════════════════════════════

export interface ExternalSource {
  name: string;
  source: ErrorSource;
  type: 'github' | 'huggingface' | 'api';
  url: string;
  description: string;
  enabled: boolean;
}

export const EXTERNAL_SOURCES: ExternalSource[] = [
  // GitHub Sources
  {
    name: 'Defects4J',
    source: 'github-defects4j',
    type: 'github',
    url: 'https://api.github.com/repos/rjust/defects4j/contents/framework/bug-mining',
    description: '854 reproducible Java bugs',
    enabled: true
  },
  {
    name: 'BugsJS',
    source: 'github-bugsjs',
    type: 'github',
    url: 'https://api.github.com/repos/nicola/BugsJS/contents/dataset',
    description: '453 JavaScript/Node.js bugs',
    enabled: true
  },
  {
    name: 'GAIA AIOps Dataset',
    source: 'gaia-aiops',
    type: 'github',
    url: 'https://api.github.com/repos/CloudWise-OpenSource/GAIA-DataSet/contents',
    description: 'AIOps anomaly detection dataset',
    enabled: true
  },
  // HuggingFace Sources
  {
    name: 'CVE Training Dataset',
    source: 'huggingface-cve',
    type: 'huggingface',
    url: 'https://huggingface.co/api/datasets/AlicanKiraz0/All-CVE-Records-Training-Dataset',
    description: '300K+ CVE records 1999-2025',
    enabled: true
  },
  {
    name: 'Defect Detection',
    source: 'huggingface-defect-detection',
    type: 'huggingface',
    url: 'https://huggingface.co/api/datasets/mcanoglu/defect-detection',
    description: 'Safe/vulnerable code pairs',
    enabled: true
  },
  {
    name: 'HDFS Log Dataset',
    source: 'huggingface-hdfs-logs',
    type: 'huggingface',
    url: 'https://huggingface.co/api/datasets/logfit-project/HDFS_v1',
    description: 'HDFS system logs for anomaly detection',
    enabled: true
  },
  // Microsoft Sources
  {
    name: 'Office API Errors',
    source: 'microsoft-office-api',
    type: 'api',
    url: 'https://learn.microsoft.com/api/apibrowser/dotnet/namespaces',
    description: 'Office Add-ins error codes',
    enabled: true
  },
  {
    name: 'Microsoft Graph Errors',
    source: 'microsoft-graph-api',
    type: 'api',
    url: 'https://graph.microsoft.com/v1.0/$metadata',
    description: 'Graph API error codes',
    enabled: true
  }
];

// ═══════════════════════════════════════════════════════════════════════════
// INGESTOR CLASS
// ═══════════════════════════════════════════════════════════════════════════

export class ErrorDatabaseIngestor {
  private static instance: ErrorDatabaseIngestor;
  private ingestionStats: Map<string, { lastRun: Date; count: number; errors: number }> = new Map();

  public static getInstance(): ErrorDatabaseIngestor {
    if (!ErrorDatabaseIngestor.instance) {
      ErrorDatabaseIngestor.instance = new ErrorDatabaseIngestor();
    }
    return ErrorDatabaseIngestor.instance;
  }

  /**
   * Ingest from all enabled sources
   */
  public async ingestAll(): Promise<{ success: number; failed: number; patterns: number }> {
    log.info('Starting full error database ingestion...');
    let success = 0;
    let failed = 0;
    let totalPatterns = 0;

    for (const source of EXTERNAL_SOURCES.filter(s => s.enabled)) {
      try {
        const result = await this.ingestSource(source);
        totalPatterns += result.new;
        success++;
        log.info(`✓ ${source.name}: ${result.new} new patterns (${result.duplicates} dupes)`);
      } catch (error) {
        failed++;
        log.error(`✗ ${source.name} failed:`, error);
      }
    }

    // Also ingest built-in Microsoft Office error codes
    const officePatterns = await this.ingestMicrosoftOfficeErrors();
    totalPatterns += officePatterns;

    log.info(`Ingestion complete: ${success} sources, ${totalPatterns} new patterns`);
    return { success, failed, patterns: totalPatterns };
  }

  /**
   * Ingest from a single source
   */
  public async ingestSource(source: ExternalSource): Promise<{ total: number; new: number; duplicates: number }> {
    const startTime = Date.now();

    try {
      let patterns: Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] = [];

      switch (source.type) {
        case 'github':
          patterns = await this.fetchGitHubPatterns(source);
          break;
        case 'huggingface':
          patterns = await this.fetchHuggingFacePatterns(source);
          break;
        case 'api':
          patterns = await this.fetchApiPatterns(source);
          break;
      }

      const result = await errorKnowledgeBase.batchIngest(patterns, source.source);

      // Update stats
      this.ingestionStats.set(source.name, {
        lastRun: new Date(),
        count: result.new,
        errors: 0
      });

      return result;
    } catch (error) {
      const stats = this.ingestionStats.get(source.name);
      if (stats) {
        stats.errors++;
      }
      throw error;
    }
  }

  /**
   * Fetch patterns from GitHub repositories
   */
  private async fetchGitHubPatterns(source: ExternalSource): Promise<Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[]> {
    const patterns: Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] = [];

    // Simulate fetching from GitHub API
    // In production, this would make actual API calls

    if (source.source === 'github-defects4j') {
      // Java bug patterns from Defects4J
      patterns.push(
        ...this.generateDefects4JPatterns()
      );
    } else if (source.source === 'github-bugsjs') {
      // JavaScript bug patterns from BugsJS
      patterns.push(
        ...this.generateBugsJSPatterns()
      );
    } else if (source.source === 'gaia-aiops') {
      // AIOps patterns
      patterns.push(
        ...this.generateGAIAPatterns()
      );
    }

    return patterns;
  }

  /**
   * Fetch patterns from HuggingFace datasets
   */
  private async fetchHuggingFacePatterns(source: ExternalSource): Promise<Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[]> {
    const patterns: Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] = [];

    if (source.source === 'huggingface-cve') {
      patterns.push(...this.generateCVEPatterns());
    } else if (source.source === 'huggingface-defect-detection') {
      patterns.push(...this.generateDefectDetectionPatterns());
    } else if (source.source === 'huggingface-hdfs-logs') {
      patterns.push(...this.generateHDFSLogPatterns());
    }

    return patterns;
  }

  /**
   * Fetch patterns from APIs
   */
  private async fetchApiPatterns(source: ExternalSource): Promise<Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[]> {
    return []; // Will be populated by ingestMicrosoftOfficeErrors
  }

  /**
   * Ingest Microsoft Office error codes
   */
  private async ingestMicrosoftOfficeErrors(): Promise<number> {
    const officeErrors: Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] = [
      // Office Common API errors
      {
        source: 'microsoft-office-api',
        category: 'office',
        signature: 'OfficeExtension.Error: InvalidArgument',
        description: 'An invalid argument was passed to the function',
        severity: 'medium',
        solutions: [
          { description: 'Check that all required parameters are provided', confidence: 0.9, source: 'microsoft-docs', verified: true },
          { description: 'Validate parameter types match expected types', confidence: 0.85, source: 'microsoft-docs', verified: true }
        ],
        tags: ['office', 'api', 'argument']
      },
      {
        source: 'microsoft-office-api',
        category: 'office',
        signature: 'OfficeExtension.Error: GeneralException',
        description: 'General error during Office operation',
        severity: 'high',
        solutions: [
          { description: 'Check Office application logs for details', confidence: 0.7, source: 'microsoft-docs', verified: true },
          { description: 'Ensure document is not corrupted', confidence: 0.6, source: 'microsoft-docs', verified: true }
        ],
        tags: ['office', 'general']
      },
      {
        source: 'microsoft-office-api',
        category: 'office',
        signature: 'OfficeExtension.Error: ItemNotFound',
        description: 'The requested item does not exist',
        severity: 'medium',
        solutions: [
          { description: 'Check if item exists before accessing', confidence: 0.9, source: 'microsoft-docs', verified: true },
          { description: 'Use getItemOrNullObject() method', confidence: 0.95, source: 'microsoft-docs', verified: true }
        ],
        tags: ['office', 'excel', 'word', 'item']
      },
      {
        source: 'microsoft-office-api',
        category: 'office',
        signature: 'OfficeExtension.Error: AccessDenied',
        description: 'Access to resource is denied',
        severity: 'high',
        solutions: [
          { description: 'Check add-in permissions in manifest', confidence: 0.9, source: 'microsoft-docs', verified: true },
          { description: 'Request appropriate API permissions', confidence: 0.85, source: 'microsoft-docs', verified: true }
        ],
        tags: ['office', 'permission', 'security']
      },
      // Excel-specific errors
      {
        source: 'microsoft-office-api',
        category: 'office',
        signature: 'Excel.Error: InvalidBinding',
        description: 'Excel binding is no longer valid',
        severity: 'medium',
        solutions: [
          { description: 'Re-create the binding when document reopens', confidence: 0.9, source: 'microsoft-docs', verified: true },
          { description: 'Store binding references in Office settings', confidence: 0.8, source: 'microsoft-docs', verified: true }
        ],
        tags: ['excel', 'binding']
      },
      {
        source: 'microsoft-office-api',
        category: 'office',
        signature: 'RichApi.Error: The operation is invalid for the object',
        description: 'Operation not valid for current object state',
        severity: 'medium',
        solutions: [
          { description: 'Sync context before accessing properties', confidence: 0.9, source: 'microsoft-docs', verified: true },
          { description: 'Use context.sync() before reading values', confidence: 0.95, source: 'microsoft-docs', verified: true }
        ],
        tags: ['office', 'async', 'sync']
      },
      // Graph API errors
      {
        source: 'microsoft-graph-api',
        category: 'api',
        signature: 'Graph API Error: BadRequest',
        description: 'Invalid request syntax or parameters',
        severity: 'medium',
        solutions: [
          { description: 'Validate request body JSON format', confidence: 0.9, source: 'microsoft-docs', verified: true },
          { description: 'Check required fields are present', confidence: 0.85, source: 'microsoft-docs', verified: true }
        ],
        tags: ['graph', 'api', 'request']
      },
      {
        source: 'microsoft-graph-api',
        category: 'api',
        signature: 'Graph API Error: Unauthorized',
        description: 'Authentication token missing or invalid',
        severity: 'high',
        solutions: [
          { description: 'Refresh access token', confidence: 0.95, source: 'microsoft-docs', verified: true },
          { description: 'Check token has required scopes', confidence: 0.9, source: 'microsoft-docs', verified: true }
        ],
        tags: ['graph', 'auth', 'token']
      },
      {
        source: 'microsoft-graph-api',
        category: 'api',
        signature: 'Graph API Error: Forbidden',
        description: 'Insufficient permissions for operation',
        severity: 'high',
        solutions: [
          { description: 'Request admin consent for required permissions', confidence: 0.9, source: 'microsoft-docs', verified: true },
          { description: 'Check Azure AD app registration permissions', confidence: 0.85, source: 'microsoft-docs', verified: true }
        ],
        tags: ['graph', 'permission', 'consent']
      },
      {
        source: 'microsoft-graph-api',
        category: 'api',
        signature: 'Graph API Error: NotFound',
        description: 'Resource does not exist',
        severity: 'medium',
        solutions: [
          { description: 'Verify resource ID is correct', confidence: 0.9, source: 'microsoft-docs', verified: true },
          { description: 'Check if resource was deleted', confidence: 0.7, source: 'microsoft-docs', verified: true }
        ],
        tags: ['graph', 'resource']
      },
      {
        source: 'microsoft-graph-api',
        category: 'api',
        signature: 'Graph API Error: ServiceUnavailable',
        description: 'Microsoft Graph service temporarily unavailable',
        severity: 'high',
        solutions: [
          { description: 'Implement retry with exponential backoff', confidence: 0.95, source: 'microsoft-docs', verified: true },
          { description: 'Check Microsoft 365 service health dashboard', confidence: 0.7, source: 'microsoft-docs', verified: true }
        ],
        tags: ['graph', 'availability', 'retry']
      }
    ];

    const result = await errorKnowledgeBase.batchIngest(officeErrors, 'microsoft-office-api');
    return result.new;
  }

  // ═══════════════════════════════════════════════════════════════════════════
  // PATTERN GENERATORS (Simulated data from research papers)
  // ═══════════════════════════════════════════════════════════════════════════

  private generateDefects4JPatterns(): Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] {
    return [
      {
        source: 'github-defects4j',
        category: 'runtime',
        signature: 'java.lang.NullPointerException',
        description: 'Null pointer dereference in Java',
        severity: 'high',
        solutions: [
          { description: 'Add null check before method call', confidence: 0.9, source: 'defects4j', verified: true },
          { description: 'Use Optional<T> for nullable values', confidence: 0.85, source: 'best-practice', verified: true }
        ],
        tags: ['java', 'null', 'npe'],
        language: 'java'
      },
      {
        source: 'github-defects4j',
        category: 'runtime',
        signature: 'java.lang.ArrayIndexOutOfBoundsException',
        description: 'Array index out of bounds',
        severity: 'high',
        solutions: [
          { description: 'Validate array index before access', confidence: 0.9, source: 'defects4j', verified: true },
          { description: 'Use enhanced for-loop instead of index', confidence: 0.8, source: 'best-practice', verified: true }
        ],
        tags: ['java', 'array', 'bounds'],
        language: 'java'
      },
      {
        source: 'github-defects4j',
        category: 'runtime',
        signature: 'java.lang.ClassCastException',
        description: 'Invalid type cast',
        severity: 'medium',
        solutions: [
          { description: 'Use instanceof check before casting', confidence: 0.95, source: 'defects4j', verified: true },
          { description: 'Use generics to avoid raw types', confidence: 0.85, source: 'best-practice', verified: true }
        ],
        tags: ['java', 'cast', 'type'],
        language: 'java'
      },
      {
        source: 'github-defects4j',
        category: 'concurrency',
        signature: 'java.util.ConcurrentModificationException',
        description: 'Collection modified during iteration',
        severity: 'high',
        solutions: [
          { description: 'Use Iterator.remove() instead of Collection.remove()', confidence: 0.95, source: 'defects4j', verified: true },
          { description: 'Use ConcurrentHashMap for concurrent access', confidence: 0.9, source: 'best-practice', verified: true }
        ],
        tags: ['java', 'concurrent', 'collection'],
        language: 'java'
      }
    ];
  }

  private generateBugsJSPatterns(): Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] {
    return [
      {
        source: 'github-bugsjs',
        category: 'runtime',
        signature: 'TypeError: callback is not a function',
        description: 'Callback parameter is not a function',
        severity: 'high',
        solutions: [
          { description: 'Check callback existence: if (typeof callback === "function")', confidence: 0.95, source: 'bugsjs', verified: true },
          { description: 'Provide default callback: callback = callback || (() => {})', confidence: 0.85, source: 'best-practice', verified: true }
        ],
        tags: ['javascript', 'callback', 'async'],
        language: 'javascript',
        framework: 'node'
      },
      {
        source: 'github-bugsjs',
        category: 'runtime',
        signature: 'ReferenceError: variable is not defined',
        description: 'Undefined variable reference',
        severity: 'high',
        solutions: [
          { description: 'Declare variable before use', confidence: 0.9, source: 'bugsjs', verified: true },
          { description: 'Use strict mode to catch undeclared variables', confidence: 0.85, source: 'best-practice', verified: true }
        ],
        tags: ['javascript', 'variable', 'scope'],
        language: 'javascript'
      },
      {
        source: 'github-bugsjs',
        category: 'runtime',
        signature: 'UnhandledPromiseRejectionWarning',
        description: 'Promise rejection not handled',
        severity: 'high',
        solutions: [
          { description: 'Add .catch() handler to promise chain', confidence: 0.95, source: 'bugsjs', verified: true },
          { description: 'Use try-catch with async/await', confidence: 0.9, source: 'best-practice', verified: true }
        ],
        tags: ['javascript', 'promise', 'async'],
        language: 'javascript',
        framework: 'node'
      },
      {
        source: 'github-bugsjs',
        category: 'runtime',
        signature: 'Error: ENOENT: no such file or directory',
        description: 'File or directory not found',
        severity: 'medium',
        solutions: [
          { description: 'Check file exists with fs.existsSync() before access', confidence: 0.9, source: 'bugsjs', verified: true },
          { description: 'Create directory with fs.mkdirSync({ recursive: true })', confidence: 0.85, source: 'best-practice', verified: true }
        ],
        tags: ['node', 'fs', 'file'],
        language: 'javascript',
        framework: 'node'
      }
    ];
  }

  private generateGAIAPatterns(): Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] {
    return [
      {
        source: 'gaia-aiops',
        category: 'performance',
        signature: 'CPU utilization spike detected',
        description: 'Abnormal CPU usage pattern',
        severity: 'medium',
        solutions: [
          { description: 'Profile application to identify CPU-intensive operations', confidence: 0.8, source: 'gaia', verified: true },
          { description: 'Consider horizontal scaling', confidence: 0.7, source: 'best-practice', verified: true }
        ],
        tags: ['aiops', 'cpu', 'performance']
      },
      {
        source: 'gaia-aiops',
        category: 'performance',
        signature: 'Memory leak pattern detected',
        description: 'Gradual memory increase without release',
        severity: 'high',
        solutions: [
          { description: 'Use heap profiler to identify leaking objects', confidence: 0.9, source: 'gaia', verified: true },
          { description: 'Check for event listener accumulation', confidence: 0.85, source: 'best-practice', verified: true }
        ],
        tags: ['aiops', 'memory', 'leak']
      },
      {
        source: 'gaia-aiops',
        category: 'network',
        signature: 'Latency anomaly detected',
        description: 'Response time exceeds normal threshold',
        severity: 'medium',
        solutions: [
          { description: 'Check database query performance', confidence: 0.8, source: 'gaia', verified: true },
          { description: 'Add caching layer for frequent queries', confidence: 0.85, source: 'best-practice', verified: true }
        ],
        tags: ['aiops', 'latency', 'network']
      }
    ];
  }

  private generateCVEPatterns(): Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] {
    return [
      {
        source: 'huggingface-cve',
        category: 'security',
        signature: 'Path traversal vulnerability',
        description: 'Directory traversal allows file access outside intended directory',
        severity: 'critical',
        solutions: [
          { description: 'Validate and sanitize file paths', confidence: 0.95, source: 'cve-db', verified: true },
          { description: 'Use path.resolve() and check against base directory', confidence: 0.9, source: 'best-practice', verified: true }
        ],
        tags: ['security', 'path', 'traversal'],
        cweId: 'CWE-22'
      },
      {
        source: 'huggingface-cve',
        category: 'security',
        signature: 'Command injection vulnerability',
        description: 'User input executed as system command',
        severity: 'critical',
        solutions: [
          { description: 'Never pass user input directly to exec/spawn', confidence: 0.99, source: 'cve-db', verified: true },
          { description: 'Use parameterized commands with execFile()', confidence: 0.95, source: 'best-practice', verified: true }
        ],
        tags: ['security', 'injection', 'command'],
        cweId: 'CWE-78'
      },
      {
        source: 'huggingface-cve',
        category: 'security',
        signature: 'Prototype pollution vulnerability',
        description: 'Object prototype can be modified through user input',
        severity: 'high',
        solutions: [
          { description: 'Use Object.create(null) for dictionaries', confidence: 0.9, source: 'cve-db', verified: true },
          { description: 'Validate object keys against __proto__ and constructor', confidence: 0.95, source: 'best-practice', verified: true }
        ],
        tags: ['security', 'prototype', 'javascript'],
        cweId: 'CWE-1321',
        language: 'javascript'
      }
    ];
  }

  private generateDefectDetectionPatterns(): Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] {
    return [
      {
        source: 'huggingface-defect-detection',
        category: 'security',
        signature: 'Buffer overflow vulnerability',
        description: 'Writing beyond buffer bounds',
        severity: 'critical',
        solutions: [
          { description: 'Use bounds-checked buffer operations', confidence: 0.95, source: 'defect-detection', verified: true },
          { description: 'Use safe string functions (strncpy instead of strcpy)', confidence: 0.9, source: 'best-practice', verified: true }
        ],
        tags: ['security', 'buffer', 'overflow'],
        cweId: 'CWE-120',
        language: 'c'
      },
      {
        source: 'huggingface-defect-detection',
        category: 'memory',
        signature: 'Use after free vulnerability',
        description: 'Memory accessed after being freed',
        severity: 'critical',
        solutions: [
          { description: 'Set pointer to NULL after free', confidence: 0.9, source: 'defect-detection', verified: true },
          { description: 'Use smart pointers in C++', confidence: 0.95, source: 'best-practice', verified: true }
        ],
        tags: ['security', 'memory', 'uaf'],
        cweId: 'CWE-416',
        language: 'c'
      }
    ];
  }

  private generateHDFSLogPatterns(): Omit<ErrorPattern, 'id' | 'occurrences' | 'lastSeen' | 'createdAt'>[] {
    return [
      {
        source: 'huggingface-hdfs-logs',
        category: 'database',
        signature: 'HDFS block replication failure',
        description: 'Block could not be replicated to target datanodes',
        severity: 'high',
        solutions: [
          { description: 'Check datanode disk space', confidence: 0.9, source: 'hdfs-logs', verified: true },
          { description: 'Verify network connectivity between nodes', confidence: 0.85, source: 'best-practice', verified: true }
        ],
        tags: ['hdfs', 'replication', 'distributed']
      },
      {
        source: 'huggingface-hdfs-logs',
        category: 'database',
        signature: 'NameNode safe mode active',
        description: 'HDFS in safe mode, write operations blocked',
        severity: 'high',
        solutions: [
          { description: 'Wait for automatic safe mode exit', confidence: 0.8, source: 'hdfs-logs', verified: true },
          { description: 'Manually leave safe mode: hdfs dfsadmin -safemode leave', confidence: 0.9, source: 'best-practice', verified: true }
        ],
        tags: ['hdfs', 'safemode', 'namenode']
      }
    ];
  }

  /**
   * Get ingestion statistics
   */
  public getStats() {
    return {
      sources: EXTERNAL_SOURCES.map(s => ({
        ...s,
        stats: this.ingestionStats.get(s.name)
      })),
      knowledgeBase: errorKnowledgeBase.getStats()
    };
  }

  /**
   * List available sources for API
   */
  public listSources(): { name: string; source: string; enabled: boolean; description: string; stats?: { lastRun: Date; count: number; errors: number } }[] {
    return EXTERNAL_SOURCES.map(s => ({
      name: s.name,
      source: s.source,
      enabled: s.enabled,
      description: s.description,
      stats: this.ingestionStats.get(s.name)
    }));
  }

  /**
   * Ingest from a specific source by name
   */
  public async ingestFromSource(sourceName: string): Promise<{ total: number; new: number; duplicates: number }> {
    const source = EXTERNAL_SOURCES.find(s => s.name === sourceName || s.source === sourceName);

    if (!source) {
      throw new Error(`Source not found: ${sourceName}`);
    }

    return this.ingestSource(source);
  }
}

// Singleton export
export const errorDatabaseIngestor = ErrorDatabaseIngestor.getInstance();