/**
 * ProtocolResolver - Routes UPS status queries to the correct protocol implementation
 *
 * Abstracts away SNMP vs UPSD differences so the daemon is protocol-agnostic.
 * Both protocols return the same IUpsStatus interface from ts/snmp/types.ts.
 */

import type { NupstSnmp } from '../snmp/manager.ts';
import type { NupstUpsd } from '../upsd/client.ts';
import type { ISnmpConfig, IUpsStatus } from '../snmp/types.ts';
import type { IUpsdConfig } from '../upsd/types.ts';
import type { TProtocol } from './types.ts';

export class ProtocolResolver {
  private snmp: NupstSnmp;
  private upsd: NupstUpsd;

  constructor(snmp: NupstSnmp, upsd: NupstUpsd) {
    this.snmp = snmp;
    this.upsd = upsd;
  }

  /**
   * Get UPS status using the specified protocol
   * @param protocol Protocol to use ('snmp' or 'upsd')
   * @param snmpConfig SNMP configuration (required for 'snmp' protocol)
   * @param upsdConfig UPSD configuration (required for 'upsd' protocol)
   * @returns UPS status
   */
  public getUpsStatus(
    protocol: TProtocol,
    snmpConfig?: ISnmpConfig,
    upsdConfig?: IUpsdConfig,
  ): Promise<IUpsStatus> {
    switch (protocol) {
      case 'upsd':
        if (!upsdConfig) {
          throw new Error('UPSD configuration required for UPSD protocol');
        }
        return this.upsd.getUpsStatus(upsdConfig);
      case 'snmp':
      default:
        if (!snmpConfig) {
          throw new Error('SNMP configuration required for SNMP protocol');
        }
        return this.snmp.getUpsStatus(snmpConfig);
    }
  }
}