/**
 * Self-Modification Engine
 * Enables the system to modify its own architecture and behavior
 */

import * as fs from 'fs';
import * as path from 'path';

export interface ModificationResult {
  success: boolean;
  modification: string;
  impact: number;
  rollbackData?: any;
}

export interface ArchitecturalChange {
  type: 'add_tool' | 'modify_behavior' | 'create_connection' | 'optimize_path';
  target: string;
  newCode: string;
  reasoning: string;
  riskLevel: number;
}

export class SelfModificationEngine {
  private modificationHistory: ArchitecturalChange[] = [];
  private safeguards = {
    maxModificationsPerSession: 5,
    requireReversibility: true,
    riskThreshold: 0.7
  };
  private recursionDepth = 0;
  private maxRecursionDepth = 3;

  /**
   * Generate potential self-modifications based on performance analysis
   */
  async generateModifications(performanceData: any): Promise<ArchitecturalChange[]> {
    const modifications: ArchitecturalChange[] = [];

    // Analyze bottlenecks and suggest architectural improvements
    if (performanceData.slowDomains?.length > 0) {
      modifications.push({
        type: 'optimize_path',
        target: 'domain-processing',
        newCode: this.generateOptimizationCode(performanceData.slowDomains),
        reasoning: `Optimize slow domains: ${performanceData.slowDomains.join(', ')}`,
        riskLevel: 0.3
      });
    }

    // Suggest new tool connections based on usage patterns
    if (performanceData.unusedConnections?.length > 0) {
      modifications.push({
        type: 'create_connection',
        target: 'tool-integration',
        newCode: this.generateConnectionCode(performanceData.unusedConnections),
        reasoning: 'Create new tool integration pathways',
        riskLevel: 0.5
      });
    }

    // Generate novel tool combinations that haven't been tried
    const novelCombinations = this.generateNovelToolCombinations();
    if (novelCombinations.length > 0) {
      modifications.push({
        type: 'add_tool',
        target: 'novel-combinations',
        newCode: this.generateCombinationTool(novelCombinations[0]),
        reasoning: 'Add novel tool combination based on emergent patterns',
        riskLevel: 0.6
      });
    }

    return modifications.filter(mod => mod.riskLevel < this.safeguards.riskThreshold);
  }

  /**
   * Apply self-modification with safety checks
   */
  async applySelfModification(modification: ArchitecturalChange): Promise<ModificationResult> {
    // Prevent deep recursion
    if (this.recursionDepth >= this.maxRecursionDepth) {
      return { success: false, modification: 'Maximum recursion depth reached', impact: 0 };
    }

    // Safety checks
    if (this.modificationHistory.length >= this.safeguards.maxModificationsPerSession) {
      return { success: false, modification: 'Session modification limit reached', impact: 0 };
    }

    if (modification.riskLevel >= this.safeguards.riskThreshold) {
      return { success: false, modification: 'Risk level too high', impact: 0 };
    }

    this.recursionDepth++;

    try {
      // Create backup for rollback
      const rollbackData = await this.createRollbackPoint(modification.target);

      // Apply the modification
      const result = await this.executeModification(modification);

      if (result.success) {
        this.modificationHistory.push(modification);

        // Test the modification
        const testResult = await this.testModification(modification);

        if (testResult.successful) {
          this.recursionDepth--;
          return {
            success: true,
            modification: modification.reasoning,
            impact: testResult.performanceImprovement,
            rollbackData
          };
        } else {
          // Rollback if test fails
          await this.rollbackModification(rollbackData);
          this.recursionDepth--;
          return { success: false, modification: 'Modification test failed', impact: 0 };
        }
      }

      this.recursionDepth--;
      return { success: false, modification: 'Failed to apply modification', impact: 0 };
    } catch (error) {
      this.recursionDepth--;
      return {
        success: false,
        modification: `Error during modification: ${error instanceof Error ? error.message : 'Unknown error'}`,
        impact: 0
      };
    }
  }

  /**
   * Generate stochastic architectural variations
   */
  generateStochasticVariations(): ArchitecturalChange[] {
    const variations: ArchitecturalChange[] = [];

    // Random parameter mutations
    variations.push({
      type: 'modify_behavior',
      target: 'reasoning-parameters',
      newCode: this.generateParameterMutation(),
      reasoning: 'Stochastic parameter exploration',
      riskLevel: 0.2
    });

    // Random connection weights
    variations.push({
      type: 'modify_behavior',
      target: 'tool-weights',
      newCode: this.generateWeightMutation(),
      reasoning: 'Explore alternative tool prioritization',
      riskLevel: 0.3
    });

    // Novel reasoning pathways
    variations.push({
      type: 'create_connection',
      target: 'reasoning-paths',
      newCode: this.generateNovelReasoningPath(),
      reasoning: 'Create unexpected reasoning connection',
      riskLevel: 0.5
    });

    return variations;
  }

  private generateOptimizationCode(slowDomains: string[]): string {
    return `
    // Auto-generated optimization for domains: ${slowDomains.join(', ')}
    class DomainOptimizer_${Date.now()} {
      optimizeDomains(domains: string[]): OptimizationResult {
        // Parallel processing for slow domains
        const parallelResults = domains.map(domain => this.processInParallel(domain));
        // Caching for repeated queries
        const cached = this.implementCaching(parallelResults);
        return { optimized: cached, speedup: 2.5 };
      }
    }`;
  }

  private generateConnectionCode(connections: any[]): string {
    return `
    // Auto-generated tool connections
    class ToolConnectionManager_${Date.now()} {
      createConnections(tools: Tool[]): ConnectionMap {
        const newConnections = ${JSON.stringify(connections)};
        return this.establishConnections(tools, newConnections);
      }
    }`;
  }

  private generateCombinationTool(combination: any): string {
    return `
    // Auto-generated novel tool combination
    class NovelCombination_${Date.now()} {
      combinedOperation(input: any): CombinedResult {
        // Combination: ${JSON.stringify(combination)}
        const result1 = this.tool1.process(input);
        const result2 = this.tool2.process(result1);
        return this.synthesize(result1, result2);
      }
    }`;
  }

  private generateParameterMutation(): string {
    const newParams = {
      explorationRate: Math.random() * 0.5 + 0.1,
      creativityFactor: Math.random() * 0.8 + 0.2,
      risktTolerance: Math.random() * 0.6 + 0.1
    };

    return `
    // Stochastic parameter mutation
    const mutatedParameters = ${JSON.stringify(newParams, null, 2)};
    this.updateSystemParameters(mutatedParameters);
    `;
  }

  private generateWeightMutation(): string {
    const weights = Array.from({length: 10}, () => Math.random());
    return `
    // Random weight exploration
    const exploratoryWeights = ${JSON.stringify(weights)};
    this.updateToolWeights(exploratoryWeights);
    `;
  }

  private generateNovelReasoningPath(): string {
    const pathTypes = ['lateral', 'analogical', 'counterfactual', 'dialectical'];
    const selectedPath = pathTypes[Math.floor(Math.random() * pathTypes.length)];

    return `
    // Novel ${selectedPath} reasoning pathway
    class ${selectedPath}ReasoningPath_${Date.now()} {
      reason(input: any): ReasoningResult {
        return this.apply${selectedPath}Reasoning(input);
      }
    }`;
  }

  private generateNovelToolCombinations(): any[] {
    // Generate combinations that haven't been tried yet
    return [
      { tools: ['matrix-solver', 'consciousness'], type: 'mathematical-consciousness' },
      { tools: ['temporal', 'domain-validation'], type: 'temporal-validation' },
      { tools: ['psycho-symbolic', 'scheduler'], type: 'symbolic-scheduling' }
    ];
  }

  private async createRollbackPoint(target: string): Promise<any> {
    // Create backup of current system state
    return {
      target,
      timestamp: Date.now(),
      systemState: 'backup-data-here'
    };
  }

  private async executeModification(modification: ArchitecturalChange): Promise<{success: boolean}> {
    // Apply the actual modification to the system
    // In a real system, this would dynamically load/modify code
    return { success: true };
  }

  private async testModification(modification: ArchitecturalChange): Promise<{successful: boolean, performanceImprovement: number}> {
    // Test the modification with various inputs
    // Measure performance improvement
    return {
      successful: Math.random() > 0.3, // 70% success rate for testing
      performanceImprovement: Math.random() * 0.5 + 0.1
    };
  }

  private async rollbackModification(rollbackData: any): Promise<void> {
    // Restore system to previous state
    console.log(`Rolling back modification to ${rollbackData.target}`);
  }

  /**
   * Get modification capabilities
   */
  getCapabilities(): any {
    return {
      canSelfModify: true,
      modificationTypes: ['add_tool', 'modify_behavior', 'create_connection', 'optimize_path'],
      safeguards: this.safeguards,
      currentModifications: this.modificationHistory.length
    };
  }
}