/**
 * Copyright (c) 2020-present, Goldman Sachs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {
  type GeneratorFn,
  type PlainObject,
  HttpStatus,
  NetworkClientError,
  ActionState,
  LogEvent,
  assertErrorThrown,
} from '@finos/legend-shared';
import {
  type ApplicationStore,
  ActionAlertActionType,
  ActionAlertType,
  LegendApplicationTelemetryHelper,
  APPLICATION_EVENT,
} from '@finos/legend-application';
import { matchRoutes } from '@finos/legend-application/browser';
import {
  action,
  computed,
  flow,
  flowResult,
  makeObservable,
  observable,
} from 'mobx';
import { User, SDLCServerClient } from '@finos/legend-server-sdlc';
import { LEGEND_STUDIO_APP_EVENT } from '../__lib__/LegendStudioEvent.js';
import { DepotServerClient } from '@finos/legend-server-depot';
import type { LegendStudioPluginManager } from '../application/LegendStudioPluginManager.js';
import type { LegendStudioApplicationConfig } from '../application/LegendStudioApplicationConfig.js';
import { LegendStudioEventHelper } from '../__lib__/LegendStudioEventHelper.js';
import { LEGEND_STUDIO_SDLC_BYPASSED_ROUTE_PATTERN } from '../__lib__/LegendStudioNavigation.js';
import { ShowcaseManagerState } from './ShowcaseManagerState.js';
import { getCurrentUserIDFromEngineServer } from '@finos/legend-graph';

export type LegendStudioApplicationStore = ApplicationStore<
  LegendStudioApplicationConfig,
  LegendStudioPluginManager
>;

export class LegendStudioBaseStore {
  readonly applicationStore: LegendStudioApplicationStore;
  readonly sdlcServerClient: SDLCServerClient;
  readonly depotServerClient: DepotServerClient;
  readonly pluginManager: LegendStudioPluginManager;

  readonly initState = ActionState.create();

  isSDLCAuthorized: boolean | undefined = false;
  private isSDLCServerInitialized = false;
  SDLCServerTermsOfServicesUrlsToView: string[] = [];

  constructor(applicationStore: LegendStudioApplicationStore) {
    makeObservable<LegendStudioBaseStore, 'initializeSDLCServerClient'>(this, {
      isSDLCAuthorized: observable,
      SDLCServerTermsOfServicesUrlsToView: observable,
      needsToAcceptSDLCServerTermsOfServices: computed,
      initialize: flow,
      initializeSDLCServerClient: flow,
      dismissSDLCServerTermsOfServicesAlert: action,
    });

    this.applicationStore = applicationStore;
    this.pluginManager = applicationStore.pluginManager;

    // depot
    this.depotServerClient = new DepotServerClient({
      serverUrl: this.applicationStore.config.depotServerUrl,
    });
    this.depotServerClient.setTracerService(
      this.applicationStore.tracerService,
    );

    // sdlc
    this.sdlcServerClient = new SDLCServerClient({
      env: this.applicationStore.config.env,
      serverUrl: this.applicationStore.config.sdlcServerUrl,
      baseHeaders: this.applicationStore.config.sdlcServerBaseHeaders,
      client: this.applicationStore.config.sdlcServerClient,
    });
    this.sdlcServerClient.setTracerService(this.applicationStore.tracerService);
  }

  *initialize(): GeneratorFn<void> {
    if (!this.initState.isInInitialState) {
      this.applicationStore.notificationService.notifyIllegalState(
        'Base store is re-initialized',
      );
      return;
    }
    this.initState.inProgress();

    // initialization components asynchronously
    // TODO: this is a nice non-blocking pattern for initialization
    // we should do this for things like documentation, etc.
    Promise.all([
      ShowcaseManagerState.retrieveNullableState(
        this.applicationStore,
      )?.initialize(),
    ]).catch((error) => {
      // do nothing
    });

    // authorize SDLC, unless navigation location match SDLC-bypassed patterns
    if (
      !matchRoutes(
        [
          { path: LEGEND_STUDIO_SDLC_BYPASSED_ROUTE_PATTERN.VIEW_BY_GAV },
          {
            path: LEGEND_STUDIO_SDLC_BYPASSED_ROUTE_PATTERN.VIEW_BY_GAV_ENTITY,
          },
          {
            path: LEGEND_STUDIO_SDLC_BYPASSED_ROUTE_PATTERN.PREVIEW_BY_GAV_ENTITY,
          },
          { path: LEGEND_STUDIO_SDLC_BYPASSED_ROUTE_PATTERN.SHOWCASE },
          { path: LEGEND_STUDIO_SDLC_BYPASSED_ROUTE_PATTERN.PCT_REPORT },
        ],
        this.applicationStore.navigationService.navigator.getCurrentLocation(),
      )
    ) {
      // setup SDLC server client
      yield flowResult(this.initializeSDLCServerClient());

      // if SDLC server is not properly authorized/initialized, we would need to stop making call
      // to SDLC server, as this could intertwine and mess up OIDC/OAuth authentication on the server
      // See https://github.com/finos/legend-studio/pull/2205
      // See https://github.com/finos/legend-sdlc/pull/628
      if (!this.isSDLCServerInitialized) {
        return;
      }

      try {
        const currentUser = User.serialization.fromJson(
          (yield this.sdlcServerClient.getCurrentUser()) as PlainObject<User>,
        );
        this.sdlcServerClient.setCurrentUser(currentUser);
        this.applicationStore.identityService.setCurrentUser(
          currentUser.userId,
        );
      } catch (error) {
        assertErrorThrown(error);
        this.applicationStore.logService.error(
          LogEvent.create(APPLICATION_EVENT.IDENTITY_AUTO_FETCH__FAILURE),
          error,
        );
        this.applicationStore.notificationService.notifyWarning(error.message);
      }
    } else {
      this.isSDLCAuthorized = undefined;
    }

    // retrieved the user identity is not already configured
    if (this.applicationStore.identityService.isAnonymous) {
      try {
        this.applicationStore.identityService.setCurrentUser(
          (yield getCurrentUserIDFromEngineServer(
            this.applicationStore.config.engineServerUrl,
          )) as string,
        );
      } catch (error) {
        assertErrorThrown(error);
        this.applicationStore.logService.error(
          LogEvent.create(APPLICATION_EVENT.IDENTITY_AUTO_FETCH__FAILURE),
          error,
        );
        this.applicationStore.notificationService.notifyWarning(error.message);
      }
    }

    // setup telemetry service
    this.applicationStore.telemetryService.setup();

    LegendApplicationTelemetryHelper.logEvent_ApplicationInitializationSucceeded(
      this.applicationStore.telemetryService,
      this.applicationStore,
    );

    LegendStudioEventHelper.notify_ApplicationLoadSucceeded(
      this.applicationStore.eventService,
    );

    this.initState.complete();
  }

  get needsToAcceptSDLCServerTermsOfServices(): boolean {
    return Boolean(this.SDLCServerTermsOfServicesUrlsToView.length);
  }

  dismissSDLCServerTermsOfServicesAlert(): void {
    this.SDLCServerTermsOfServicesUrlsToView = [];
  }

  private *initializeSDLCServerClient(): GeneratorFn<void> {
    try {
      this.isSDLCAuthorized =
        (yield this.sdlcServerClient.isAuthorized()) as boolean;
      if (!this.isSDLCAuthorized) {
        this.applicationStore.navigationService.navigator.goToAddress(
          SDLCServerClient.authorizeCallbackUrl(
            this.applicationStore.config.sdlcServerUrl,
            this.applicationStore.navigationService.navigator.getCurrentAddress(),
            this.applicationStore.config.sdlcServerClient,
          ),
        );
      } else {
        // Only proceed intialization after passing authorization check

        // check terms of service agreement status
        this.SDLCServerTermsOfServicesUrlsToView =
          (yield this.sdlcServerClient.hasAcceptedTermsOfService()) as string[];
        if (this.SDLCServerTermsOfServicesUrlsToView.length) {
          this.applicationStore.alertService.setActionAlertInfo({
            message: `Please read and accept the SDLC servers' terms of service`,
            prompt: `Click 'Done' when you have accepted all the terms`,
            type: ActionAlertType.CAUTION,
            actions: [
              {
                label: 'See terms of services',
                default: true,
                handler: (): void =>
                  this.SDLCServerTermsOfServicesUrlsToView.forEach((url) =>
                    this.applicationStore.navigationService.navigator.visitAddress(
                      url,
                    ),
                  ),
                type: ActionAlertActionType.PROCEED,
              },
              {
                label: 'Done',
                type: ActionAlertActionType.PROCEED_WITH_CAUTION,
                handler: (): void => {
                  this.dismissSDLCServerTermsOfServicesAlert();
                  this.applicationStore.navigationService.navigator.reload();
                },
              },
            ],
          });
        }

        // fetch server features config and platforms
        yield this.sdlcServerClient.fetchServerPlatforms();
        yield this.sdlcServerClient.fetchServerFeaturesConfiguration();

        // the sdlc server client is authorized and initialized
        this.isSDLCServerInitialized = true;
      }
    } catch (error) {
      assertErrorThrown(error);
      if (
        // eslint-disable-next-line no-process-env
        process.env.NODE_ENV === 'development' &&
        error instanceof NetworkClientError &&
        error.response.status === HttpStatus.UNAUTHORIZED
      ) {
        this.applicationStore.alertService.setActionAlertInfo({
          message:
            'The first time the application starts in development mode, the developer would need to authenticate using SDLC server. Please do so then manually reload the app',
          type: ActionAlertType.STANDARD,
          actions: [
            {
              label: 'Authenticate using SDLC',
              type: ActionAlertActionType.PROCEED,
              default: true,
              handler: (): void => {
                this.applicationStore.navigationService.navigator.visitAddress(
                  this.sdlcServerClient.currentUserUrl,
                );
                this.applicationStore.alertService.setBlockingAlert({
                  message:
                    'Waiting for the developer to authenticate using SDLC server',
                  prompt:
                    'Please manually reload the application after authentication',
                });
              },
            },
          ],
        });
      } else {
        this.applicationStore.logService.error(
          LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
          error,
        );
        this.applicationStore.notificationService.notifyError(error);
      }
    }
  }
}