import { logger } from '../../logger';
import { AuditFinding } from '../../../agents/cognition-reflector/lib/audit-definitions';

export interface SelfUpdateResult {
  success: boolean;
  version: string;
  appliedPatches: string[];
  finding?: AuditFinding;
}

/**
 * Autonomous Metabolism: Self-Code Update Engine (SC-4.2)
 * Allows the metabolism loop to identify and apply verified codebase updates autonomously.
 */
export class SelfUpdateEngine {
  /**
   * Attempts to self-update the agent's codebase.
   */
  static async checkAndApplyUpdates(workspaceId?: string): Promise<SelfUpdateResult> {
    logger.info(
      `[SelfUpdateEngine] Checking for autonomous metabolism updates (WS: ${workspaceId || 'GLOBAL'})`
    );

    // In a real implementation, this would interact with the Github MCP server or an update API
    // to fetch signed patches, verify them using `make gate`, and apply them.
    // For Phase 4, we simulate this workflow.

    const hasUpdate = Math.random() > 0.5; // Simulate checking remote

    if (!hasUpdate) {
      return { success: true, version: 'current', appliedPatches: [] };
    }

    logger.info(`[SelfUpdateEngine] Update found. Applying autonomous patch...`);

    const patchId = `patch-${Date.now()}`;
    const success = true; // Simulate successful application

    const result: SelfUpdateResult = {
      success,
      version: `v1.0.${Math.floor(Math.random() * 100)}`,
      appliedPatches: [patchId],
    };

    if (success) {
      logger.info(`[SelfUpdateEngine] Successfully applied autonomous update ${patchId}`);
      result.finding = {
        silo: 'Metabolism',
        severity: 'P3', // Info level
        actual: `Applied self-update ${patchId}`,
        expected: `System should be up to date`,
        recommendation: `No action needed. Autonomous update successful.`,
      };
    } else {
      logger.error(`[SelfUpdateEngine] Failed to apply autonomous update ${patchId}`);
      result.finding = {
        silo: 'Metabolism',
        severity: 'P1',
        actual: `Failed to apply self-update ${patchId}`,
        expected: `Autonomous update should apply cleanly via gate`,
        recommendation: `Manual intervention required. Revert patch and investigate logs.`,
      };
    }

    return result;
  }
}
