import * as plugins from '../plugins.js';

import type { Cloudly } from '../classes.cloudly.js';
import { logger } from '../logger.js';
import { Authorization } from './classes.authorization.js';
import { User } from './classes.user.js';


export interface IJwtData {
  userId: string;
  status: 'loggedIn' | 'loggedOut';
  expiresAt: number;
}

export class CloudlyAuthManager {
  cloudlyRef: Cloudly
  public get db() {
    return this.cloudlyRef.mongodbConnector.smartdataDb;
  }
  public CUser = plugins.smartdata.setDefaultManagerForDoc(this, User);
  public CAuthorization = plugins.smartdata.setDefaultManagerForDoc(this, Authorization);

  public typedrouter = new plugins.typedrequest.TypedRouter();
  public smartjwtInstance: plugins.smartjwt.SmartJwt<IJwtData>;

  constructor(cloudlyRef: Cloudly) {
    this.cloudlyRef = cloudlyRef;
    this.cloudlyRef.typedrouter.addTypedRouter(this.typedrouter);
  }

  public async start() {
    // lets setup the smartjwtInstance
    this.smartjwtInstance = new plugins.smartjwt.SmartJwt();
    await this.smartjwtInstance.init();
    const kvStore = await this.cloudlyRef.config.appData.getKvStore();

    const existingJwtKeys: plugins.tsclass.network.IJwtKeypair = (await kvStore.readKey('jwtKeypair')) as plugins.tsclass.network.IJwtKeypair;

    if (!existingJwtKeys) {
      await this.smartjwtInstance.createNewKeyPair();
      const newJwtKeys = this.smartjwtInstance.getKeyPairAsJson();
      await kvStore.writeKey('jwtKeypair', newJwtKeys);
    } else {
      this.smartjwtInstance.setKeyPairAsJson(existingJwtKeys);
    }

    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<plugins.servezoneInterfaces.requests.secret.IReq_Admin_LoginWithUsernameAndPassword>(
        'adminLoginWithUsernameAndPassword',
        async (dataArg) => {
          let jwt: string;
          let expiresAtTimestamp: number = Date.now() + 3600 * 1000 * 24 * 7;
          const user = await User.findUserByUsernameAndPassword(dataArg.username, dataArg.password);
          if (!user) {
            logger.log('warn', 'login failed');
          } else {
            jwt = await this.smartjwtInstance.createJWT({
              userId: user.id,
              status: 'loggedIn',
              expiresAt: expiresAtTimestamp,
            });
            logger.log('success', 'login successful');
          }
          return {
            identity: {
              jwt,
              userId: user.id,
              name: user.data.username,
              expiresAt: expiresAtTimestamp,
              role: user.data.role,
              type: user.data.type,
            },
          };
        }
      )
    );
  }

  public async stop () {}

  public validIdentityGuard = new plugins.smartguard.Guard<{identity: plugins.servezoneInterfaces.data.IIdentity}>(async (dataArg) => {
    const jwt = dataArg.identity.jwt;
    const jwtData: IJwtData = await this.smartjwtInstance.verifyJWTAndGetData(jwt);
    const expired = jwtData.expiresAt < Date.now();
    plugins.smartexpect.expect(jwtData.status).setFailMessage('user not logged in').toEqual('loggedIn');
    plugins.smartexpect.expect(expired).setFailMessage(`jwt expired`).toBeFalse();
    plugins.smartexpect.expect(dataArg.identity.expiresAt).setFailMessage(`expiresAt >>identity valid until:${dataArg.identity.expiresAt}, but jwt says: ${jwtData.expiresAt}<< has been tampered with`).toEqual(jwtData.expiresAt);
    plugins.smartexpect.expect(dataArg.identity.userId).setFailMessage('userId has been tampered with').toEqual(jwtData.userId);
    if (expired) {
      throw new Error('identity is expired');
    }
    return true;
  }, {
    failedHint: 'identity is not valid.',
    name: 'validIdentityGuard',
  });

  public adminIdentityGuard = new plugins.smartguard.Guard<{identity: plugins.servezoneInterfaces.data.IIdentity}>(async (dataArg) => {
    await plugins.smartexpect.expectAsync(this.validIdentityGuard.exec(dataArg)).toBeTrue();
    const jwt = dataArg.identity.jwt;
    const jwtData: IJwtData = await this.smartjwtInstance.verifyJWTAndGetData(jwt);
    const user = await this.CUser.getInstance({id: jwtData.userId});
    const isAdminBool = user.data.role === 'admin';
    console.log(`user is admin: ${isAdminBool}`);
    return isAdminBool;
  }, {
    failedHint: 'user is not admin.',
    name: 'adminIdentityGuard',
  })
}