// ARI Execution Layer
// Interactions with GPN, M-RTGS, ALPS, GASE

import prisma from '@/shared/database/prisma';
import { logger } from '@/infrastructure/monitoring/logger';
import { gpnSwitchingService } from '@/core/payments/gpn/gpn-switching.service';
import { mrtgsQueueManagerService } from '@/core/settlement/m-rtgs/mrtgs-queue-manager.service';


export interface ExecutionRequest {
  decisionId: string;
  targetSystem: 'gpn' | 'm_rtgs' | 'alps' | 'gase' | 'fx_engine';
  action: Record<string, unknown>;
}

export class AriExecutionService {
  /**
   * Execute ARI decision
   */
  async executeDecision(request: ExecutionRequest): Promise<{ executed: boolean; result?: unknown }> {
    const decision = await prisma.ari_decisions.findUnique({
      where: { decisionId: request.decisionId },
    });

    if (!decision) {
      throw new Error('Decision not found');
    }

    if (decision.status !== 'pending') {
      logger.warn('ARI Execution: Decision already processed', { decisionId: request.decisionId });
      return { executed: false };
    }

    try {
      let result: unknown;

      switch (request.targetSystem) {
        case 'gpn':
          result = await this.executeGpnAction(request.action);
          break;

        case 'm_rtgs':
          result = await this.executeMrtgsAction(request.action);
          break;

        case 'alps':
          result = await this.executeAlpsAction(request.action);
          break;

        case 'gase':
          result = await this.executeGaseAction(request.action);
          break;

        case 'fx_engine':
          result = await this.executeFxEngineAction(request.action);
          break;

        default:
          throw new Error(`Unknown target system: ${request.targetSystem}`);
      }

      // Update decision status
      await prisma.ari_decisions.update({
        where: { decisionId: request.decisionId },
        data: {
          status: 'applied',
          appliedAt: new Date(),
        },
      });

      logger.info('ARI Execution: Decision executed', {
        decisionId: request.decisionId,
        targetSystem: request.targetSystem,
      });

      return { executed: true, result };
    } catch (error) {
      logger.error('ARI Execution: Decision execution failed', {
        error,
        decisionId: request.decisionId,
      });

      await prisma.ari_decisions.update({
        where: { decisionId: request.decisionId },
        data: { status: 'rejected' },
      });

      return { executed: false };
    }
  }

  /**
   * Execute GPN action
   */
  private async executeGpnAction(action: Record<string, unknown>): Promise<unknown> {
    // Example: Adjust routing parameters
    if (action.type === 'adjust_routing') {
      // In production, would update GPN routing configuration
      logger.info('ARI Execution: GPN routing adjusted', { action });
      return { adjusted: true };
    }

    return { executed: false };
  }

  /**
   * Execute M-RTGS action
   */
  private async executeMrtgsAction(action: Record<string, unknown>): Promise<unknown> {
    // Example: Adjust queue priority
    if (action.type === 'adjust_priority') {
      // In production, would update queue priorities
      logger.info('ARI Execution: M-RTGS priority adjusted', { action });
      return { adjusted: true };
    }

    return { executed: false };
  }

  /**
   * Execute ALPS action
   */
  private async executeAlpsAction(action: Record<string, unknown>): Promise<unknown> {
    // Example: Adjust liquidity limits
    if (action.type === 'adjust_liquidity_limit') {
      // In production, would call ALPS service
      logger.info('ARI Execution: ALPS liquidity limit adjusted', { action });
      return { adjusted: true };
    }

    return { executed: false };
  }

  /**
   * Execute GASE action
   */
  private async executeGaseAction(action: Record<string, unknown>): Promise<unknown> {
    // Example: Update AML rules
    if (action.type === 'update_aml_rules') {
      // In production, would call GASE service
      logger.info('ARI Execution: GASE AML rules updated', { action });
      return { updated: true };
    }

    return { executed: false };
  }

  /**
   * Execute FX Engine action
   */
  private async executeFxEngineAction(action: Record<string, unknown>): Promise<unknown> {
    // Example: Adjust FX bands
    if (action.type === 'adjust_fx_band') {
      // In production, would call FX engine
      logger.info('ARI Execution: FX band adjusted', { action });
      return { adjusted: true };
    }

    return { executed: false };
  }
}

export const ariExecutionService = new AriExecutionService();

