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

/**
 * CRUD handlers for DomainDoc.
 */
export class DomainHandler {
  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 all domains
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_GetDomains>(
        'getDomains',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'domains:read');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { domains: [] };
          const docs = await dnsManager.listDomains();
          return { domains: docs.map((d) => dnsManager.toPublicDomain(d)) };
        },
      ),
    );

    // Get single domain
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_GetDomain>(
        'getDomain',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'domains:read');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { domain: null };
          const doc = await dnsManager.getDomain(dataArg.id);
          return { domain: doc ? dnsManager.toPublicDomain(doc) : null };
        },
      ),
    );

    // Create dcrouter-hosted domain
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_CreateDomain>(
        'createDomain',
        async (dataArg) => {
          const userId = await this.requireAuth(dataArg, 'domains:write');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { success: false, message: 'DnsManager not initialized' };
          try {
            const id = await dnsManager.createDcrouterDomain({
              name: dataArg.name,
              description: dataArg.description,
              createdBy: userId,
            });
            return { success: true, id };
          } catch (err: unknown) {
            return { success: false, message: (err as Error).message };
          }
        },
      ),
    );

    // Import domains from a provider
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_ImportDomain>(
        'importDomain',
        async (dataArg) => {
          const userId = await this.requireAuth(dataArg, 'domains:write');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { success: false, message: 'DnsManager not initialized' };
          try {
            const importedIds = await dnsManager.importDomainsFromProvider({
              providerId: dataArg.providerId,
              domainNames: dataArg.domainNames,
              createdBy: userId,
            });
            return { success: true, importedIds };
          } catch (err: unknown) {
            return { success: false, message: (err as Error).message };
          }
        },
      ),
    );

    // Update domain metadata
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_UpdateDomain>(
        'updateDomain',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'domains:write');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { success: false, message: 'DnsManager not initialized' };
          const ok = await dnsManager.updateDomain(dataArg.id, {
            description: dataArg.description,
          });
          return ok ? { success: true } : { success: false, message: 'Domain not found' };
        },
      ),
    );

    // Delete domain
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_DeleteDomain>(
        'deleteDomain',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'domains:write');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { success: false, message: 'DnsManager not initialized' };
          const ok = await dnsManager.deleteDomain(dataArg.id);
          return ok ? { success: true } : { success: false, message: 'Domain not found' };
        },
      ),
    );

    // Force-resync provider domain
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_SyncDomain>(
        'syncDomain',
        async (dataArg) => {
          await this.requireAuth(dataArg, 'domains:write');
          const dnsManager = this.opsServerRef.dcRouterRef.dnsManager;
          if (!dnsManager) return { success: false, message: 'DnsManager not initialized' };
          return await dnsManager.syncDomain(dataArg.id);
        },
      ),
    );
  }
}