// GPU Edge Node Service
// GPU edge node management (MGN, QGN, ZKN, SAN types)

import prisma from '@/shared/database/prisma';
import { v4 as uuidv4 } from 'uuid';
import { logger } from '@/infrastructure/monitoring/logger';


export interface GpuEdgeNodeRequest {
  nodeType: 'MGN' | 'QGN' | 'ZKN' | 'SAN'; // Metaverse GPU Node, Quantum Gateway Node, ZK Validation Node, Sovereign AI Node
  regionId: string;
  nodeName: string;
  gpuCapacity: number; // GPU units
  networkAddress: string;
  quantumSafeTunnelingEnabled: boolean;
}

export interface GpuEdgeNodeResult {
  nodeId: string;
  nodeType: string;
  regionId: string;
  status: string;
}

export class GpuEdgeNodeService {
  /**
   * Create GPU edge node
   * Node types:
   * - MGN: Metaverse GPU Node (metaverse rendering)
   * - QGN: Quantum Gateway Node (quantum proxy operations)
   * - ZKN: ZK Validation Node (ZK ledger validation)
   * - SAN: Sovereign AI Node (AI behavioral engines)
   */
  async createGpuEdgeNode(
    request: GpuEdgeNodeRequest
  ): Promise<GpuEdgeNodeResult> {
    logger.info('GPU Edge: Creating edge node', { request });

    const nodeId = `GPU-EDGE-${uuidv4()}`;

    const node = await prisma.gpu_edge_nodes.create({
      data: {
        nodeId,
        nodeType: request.nodeType,
        regionId: request.regionId,
        nodeName: request.nodeName,
        gpuCapacity: request.gpuCapacity,
        networkAddress: request.networkAddress,
        quantumSafeTunnelingEnabled: request.quantumSafeTunnelingEnabled,
        status: 'active',
      },
    });

    logger.info('GPU Edge: Node created', { nodeId });

    return {
      nodeId,
      nodeType: node.nodeType,
      regionId: node.regionId,
      status: node.status,
    };
  }

  /**
   * Get node by ID
   */
  async getNode(nodeId: string) {
    return await prisma.gpu_edge_nodes.findUnique({
      where: { nodeId },
      include: {
        region: true,
        tasks: true,
      },
    });
  }

  /**
   * Get nodes by type
   */
  async getNodesByType(nodeType: string) {
    return await prisma.gpu_edge_nodes.findMany({
      where: { nodeType, status: 'active' },
      orderBy: { createdAt: 'desc' },
    });
  }

  /**
   * Get nodes for region
   */
  async getNodesForRegion(regionId: string) {
    return await prisma.gpu_edge_nodes.findMany({
      where: { regionId, status: 'active' },
      orderBy: { createdAt: 'desc' },
    });
  }

  /**
   * Update node status
   */
  async updateNodeStatus(nodeId: string, status: string) {
    return await prisma.gpu_edge_nodes.update({
      where: { nodeId },
      data: { status },
    });
  }
}

export const gpuEdgeNodeService = new GpuEdgeNodeService();