import * as plugins from '../../plugins.js';
import type { OpsServer } from '../classes.opsserver.js';
import * as interfaces from '../../../ts_interfaces/index.js';

/**
 * CRUD handlers for DnsRecordDoc.
 */
export class DnsRecordHandler {
  public typedrouter = new plugins.typedrequest.TypedRouter();

  constructor(private opsServerRef: OpsServer) {
    this.opsServerRef.typedrouter.addTypedRouter(this.typedrouter);
    this.registerHandlers();
  }

  private async requireAuth(
    request: { identity?: interfaces.data.IIdentity; apiToken?: string },
    requiredScope?: interfaces.data.TApiTokenScope,
  ): Promise<string> {
    if (request.identity?.jwt) {
      try {
        const isAdmin = await this.opsServerRef.adminHandler.adminIdentityGuard.exec({
          identity: request.identity,
        });
        if (isAdmin) return request.identity.userId;
      } catch { /* fall through */ }
    }

    if (request.apiToken) {
      const tokenManager = this.opsServerRef.dcRouterRef.apiTokenManager;
      if (tokenManager) {
        const token = await tokenManager.validateToken(request.apiToken);
        if (token) {
          if (!requiredScope || tokenManager.hasScope(token, requiredScope)) {
            return token.createdBy;
          }
          throw new plugins.typedrequest.TypedResponseError('insufficient scope');
        }
      }
    }

    throw new plugins.typedrequest.TypedResponseError('unauthorized');
  }

  private registerHandlers(): void {
    // Get records by domain
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_GetDnsRecords>(
        'getDnsRecords',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'dns-records:read');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { records: [] };
          const docs = await dnsManager.listRecordsForDomain(dataArg.domainId);
          return { records: docs.map((d) => dnsManager.toPublicRecord(d)) };
        },
      ),
    );

    // Get single record
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_GetDnsRecord>(
        'getDnsRecord',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'dns-records:read');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { record: null };
          const doc = await dnsManager.getRecord(dataArg.id);
          return { record: doc ? dnsManager.toPublicRecord(doc) : null };
        },
      ),
    );

    // Create record
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_CreateDnsRecord>(
        'createDnsRecord',
        async (dataArg) => {
          const userId = await this.requireAuth(dataArg, 'dns-records:write');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { success: false, message: 'DnsManager not initialized' };
          return await dnsManager.createRecord({
            domainId: dataArg.domainId,
            name: dataArg.name,
            type: dataArg.type,
            value: dataArg.value,
            ttl: dataArg.ttl,
            proxied: dataArg.proxied,
            createdBy: userId,
          });
        },
      ),
    );

    // Update record
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_UpdateDnsRecord>(
        'updateDnsRecord',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'dns-records:write');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { success: false, message: 'DnsManager not initialized' };
          return await dnsManager.updateRecord({
            id: dataArg.id,
            name: dataArg.name,
            value: dataArg.value,
            ttl: dataArg.ttl,
            proxied: dataArg.proxied,
          });
        },
      ),
    );

    // Delete record
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_DeleteDnsRecord>(
        'deleteDnsRecord',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'dns-records:write');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { success: false, message: 'DnsManager not initialized' };
          return await dnsManager.deleteRecord(dataArg.id);
        },
      ),
    );
  }
}