/*
 * CloudBeaver - Cloud Database Manager
 * Copyright (C) 2020-2024 DBeaver Corp and others
 *
 * Licensed under the Apache License, Version 2.0.
 * you may not use this file except in compliance with the License.
 */
import { injectable } from '@cloudbeaver/core-di';
import { Executor, IExecutor } from '@cloudbeaver/core-executor';
import { md5, uuid } from '@cloudbeaver/core-utils';

import { AuthProvider, AuthProvidersResource } from './AuthProvidersResource';
import type { IAuthCredentials } from './IAuthCredentials';

interface IServiceDescriptionProps {
  configurationWizard: boolean;
}

export type ServiceDescriptionComponent = React.FC<IServiceDescriptionProps>;

interface IServiceDescriptionLinkOptions {
  isSupported: (service: AuthProvider) => boolean;
  description: () => ServiceDescriptionComponent;
}

interface IServiceDescriptionLink extends IServiceDescriptionLinkOptions {
  id: string;
}

export interface RequestedProvider {
  providerId: string;
  configurationId?: string;
}

@injectable()
export class AuthProviderService {
  readonly requestAuthProvider: IExecutor<RequestedProvider>;

  private readonly serviceDescriptionLinker: IServiceDescriptionLink[]; // TODO: probably should be replaced by PlaceholderContainer

  constructor(private readonly authProvidersResource: AuthProvidersResource) {
    this.requestAuthProvider = new Executor();
    this.serviceDescriptionLinker = [];
  }

  getServiceDescriptionLinks(service: AuthProvider): IServiceDescriptionLink[] {
    return this.serviceDescriptionLinker.filter(link => link.isSupported(service));
  }

  addServiceDescriptionLink(link: IServiceDescriptionLinkOptions): void {
    this.serviceDescriptionLinker.push({
      id: uuid(),
      ...link,
    });
  }

  async requireProvider(providerId: string, configurationId?: string): Promise<boolean> {
    const contexts = await this.requestAuthProvider.execute({ providerId, configurationId });
    const provider = contexts.getContext(AuthProviderContext);

    return provider.get();
  }

  hashValue(value: string): string {
    return md5(value).toUpperCase();
  }

  async processCredentials(providerId: string, credentials: IAuthCredentials): Promise<IAuthCredentials> {
    const provider = await this.authProvidersResource.load(providerId);

    if (!provider) {
      return credentials;
    }

    const credentialsProcessed: IAuthCredentials = {
      profile: credentials.profile,
      credentials: { ...credentials.credentials },
    };

    const profile = provider.credentialProfiles[credentials.profile as any as number];

    for (const parameter of profile.credentialParameters) {
      if (parameter.encryption === 'hash' && parameter.id in credentialsProcessed.credentials) {
        const value = credentialsProcessed.credentials[parameter.id];

        if (typeof value === 'string') {
          credentialsProcessed.credentials[parameter.id] = this.hashValue(value);
        }
      }
    }

    return credentialsProcessed;
  }
}

interface IAuthProviderContext {
  get: () => boolean;
  auth: () => void;
}

export function AuthProviderContext(): IAuthProviderContext {
  let state = false;

  return {
    get: () => state,
    auth: () => {
      state = true;
    },
  };
}