// GPU Edge Monitoring Service
// Node health, performance, quantum-safe tunneling monitoring

import prisma from '@/shared/database/prisma';
import { logger } from '@/infrastructure/monitoring/logger';


export interface GpuEdgeHealthCheck {
  nodeId: string;
  health: 'healthy' | 'degraded' | 'unhealthy';
  gpuUtilization: number;
  latency: number;
  quantumTunnelStatus: 'active' | 'inactive';
  issues: string[];
}

export class GpuEdgeMonitoringService {
  /**
   * Perform health check on GPU edge node
   */
  async performHealthCheck(nodeId: string): Promise<GpuEdgeHealthCheck> {
    const node = await prisma.gpu_edge_nodes.findUnique({
      where: { nodeId },
    });

    if (!node) {
      throw new Error(`Node not found: ${nodeId}`);
    }

    // Simulate health check (in production, would query actual node)
    const gpuUtilization = Math.random() * 100; // 0-100%
    const latency = Math.random() * 2; // 0-2ms
    const quantumTunnelStatus = node.quantumSafeTunnelingEnabled
      ? 'active'
      : 'inactive';

    const issues: string[] = [];

    let health: 'healthy' | 'degraded' | 'unhealthy' = 'healthy';

    if (gpuUtilization > 90) {
      issues.push('High GPU utilization');
      health = 'degraded';
    }

    if (latency > 1) {
      issues.push('Latency exceeds 1ms threshold');
      health = 'degraded';
    }

    if (node.status !== 'active') {
      issues.push('Node status is not active');
      health = 'unhealthy';
    }

    // Save health check record
    await prisma.gpu_edge_tasks.create({
      data: {
        taskId: `HEALTH-${Date.now()}`,
        nodeId,
        taskType: 'health_check',
        status: 'completed',
        result: {
          health,
          gpuUtilization,
          latency,
          quantumTunnelStatus,
          issues,
        } as any,
      },
    });

    return {
      nodeId,
      health,
      gpuUtilization,
      latency,
      quantumTunnelStatus,
      issues,
    };
  }

  /**
   * Get monitoring metrics for node
   */
  async getNodeMetrics(nodeId: string) {
    const tasks = await prisma.gpu_edge_tasks.findMany({
      where: { nodeId },
      orderBy: { createdAt: 'desc' },
      take: 100,
    });

    return {
      nodeId,
      totalTasks: tasks.length,
      completedTasks: tasks.filter((t) => t.status === 'completed').length,
      failedTasks: tasks.filter((t) => t.status === 'failed').length,
      averageLatency:
        tasks.reduce((sum, t) => {
          const result = t.result as any;
          return sum + (result?.latency || 0);
        }, 0) / tasks.length || 0,
    };
  }

  /**
   * Get monitoring metrics for region
   */
  async getRegionMetrics(regionId: string) {
    const nodes = await prisma.gpu_edge_nodes.findMany({
      where: { regionId },
    });

    const metrics = await Promise.all(
      nodes.map((node) => this.getNodeMetrics(node.nodeId))
    );

    return {
      regionId,
      totalNodes: nodes.length,
      activeNodes: nodes.filter((n) => n.status === 'active').length,
      nodeMetrics: metrics,
    };
  }
}

export const gpuEdgeMonitoringService = new GpuEdgeMonitoringService();

