import { Directive, OnDestroy, OnInit } from '@angular/core';

import {
    ActivatedRoute,
    Router,
} from '@angular/router';

import { TwoFactorProviderType } from 'jslib-common/enums/twoFactorProviderType';

import { TwoFactorEmailRequest } from 'jslib-common/models/request/twoFactorEmailRequest';

import { AuthResult } from 'jslib-common/models/domain';

import { ApiService } from 'jslib-common/abstractions/api.service';
import { AuthService } from 'jslib-common/abstractions/auth.service';
import { EnvironmentService } from 'jslib-common/abstractions/environment.service';
import { I18nService } from 'jslib-common/abstractions/i18n.service';
import { PlatformUtilsService } from 'jslib-common/abstractions/platformUtils.service';
import { StateService } from 'jslib-common/abstractions/state.service';
import { StorageService } from 'jslib-common/abstractions/storage.service';

import { TwoFactorProviders } from 'jslib-common/services/auth.service';
import { ConstantsService } from 'jslib-common/services/constants.service';

import * as DuoWebSDK from 'duo_web_sdk';
import { WebAuthn } from 'jslib-common/misc/webauthn';

@Directive()
export class TwoFactorComponent implements OnInit, OnDestroy {
    token: string = '';
    remember: boolean = false;
    webAuthnReady: boolean = false;
    webAuthnNewTab: boolean = false;
    providers = TwoFactorProviders;
    providerType = TwoFactorProviderType;
    selectedProviderType: TwoFactorProviderType = TwoFactorProviderType.Authenticator;
    webAuthnSupported: boolean = false;
    webAuthn: WebAuthn = null;
    title: string = '';
    twoFactorEmail: string = null;
    formPromise: Promise<any>;
    emailPromise: Promise<any>;
    identifier: string = null;
    onSuccessfulLogin: () => Promise<any>;
    onSuccessfulLoginNavigate: () => Promise<any>;

    protected loginRoute = 'login';
    protected successRoute = 'vault';

    constructor(protected authService: AuthService, protected router: Router,
        protected i18nService: I18nService, protected apiService: ApiService,
        protected platformUtilsService: PlatformUtilsService, protected win: Window,
        protected environmentService: EnvironmentService, protected stateService: StateService,
        protected storageService: StorageService, protected route: ActivatedRoute) {
        this.webAuthnSupported = this.platformUtilsService.supportsWebAuthn(win);
    }

    async ngOnInit() {
        if (!this.authing || this.authService.twoFactorProvidersData == null) {
            this.router.navigate([this.loginRoute]);
            return;
        }

        const queryParamsSub = this.route.queryParams.subscribe(async qParams => {
            if (qParams.identifier != null) {
                this.identifier = qParams.identifier;
            }

            if (queryParamsSub != null) {
                queryParamsSub.unsubscribe();
            }
        });

        if (this.needsLock) {
            this.successRoute = 'lock';
        }

        if (this.win != null && this.webAuthnSupported) {
            let webVaultUrl = this.environmentService.getWebVaultUrl();
            if (webVaultUrl == null) {
                webVaultUrl = 'https://vault.bitwarden.com';
            }
            this.webAuthn = new WebAuthn(this.win, webVaultUrl, this.webAuthnNewTab, this.platformUtilsService,
                this.i18nService, (token: string) => {
                    this.token = token;
                    this.submit();
                }, (error: string) => {
                    this.platformUtilsService.showToast('error', this.i18nService.t('errorOccurred'), error);
                }, (info: string) => {
                    if (info === 'ready') {
                        this.webAuthnReady = true;
                    }
                }
            );
        }

        this.selectedProviderType = this.authService.getDefaultTwoFactorProvider(this.webAuthnSupported);
        await this.init();
    }

    ngOnDestroy(): void {
        this.cleanupWebAuthn();
        this.webAuthn = null;
    }

    async init() {
        if (this.selectedProviderType == null) {
            this.title = this.i18nService.t('loginUnavailable');
            return;
        }

        this.cleanupWebAuthn();
        this.title = (TwoFactorProviders as any)[this.selectedProviderType].name;
        const providerData = this.authService.twoFactorProvidersData.get(this.selectedProviderType);
        switch (this.selectedProviderType) {
            case TwoFactorProviderType.WebAuthn:
                if (!this.webAuthnNewTab) {
                    setTimeout(() => {
                        this.authWebAuthn();
                    }, 500);
                }
                break;
            case TwoFactorProviderType.Duo:
            case TwoFactorProviderType.OrganizationDuo:
                setTimeout(() => {
                    DuoWebSDK.init({
                        iframe: undefined,
                        host: providerData.Host,
                        sig_request: providerData.Signature,
                        submit_callback: async (f: HTMLFormElement) => {
                            const sig = f.querySelector('input[name="sig_response"]') as HTMLInputElement;
                            if (sig != null) {
                                this.token = sig.value;
                                await this.submit();
                            }
                        },
                    });
                }, 0);
                break;
            case TwoFactorProviderType.Email:
                this.twoFactorEmail = providerData.Email;
                if (this.authService.twoFactorProvidersData.size > 1) {
                    await this.sendEmail(false);
                }
                break;
            default:
                break;
        }
    }

    async submit() {
        if (this.token == null || this.token === '') {
            this.platformUtilsService.showToast('error', this.i18nService.t('errorOccurred'),
                this.i18nService.t('verificationCodeRequired'));
            return;
        }

        if (this.selectedProviderType === TwoFactorProviderType.WebAuthn) {
            if (this.webAuthn != null) {
                this.webAuthn.stop();
            } else {
                return;
            }
        } else if (this.selectedProviderType === TwoFactorProviderType.Email ||
            this.selectedProviderType === TwoFactorProviderType.Authenticator) {
            this.token = this.token.replace(' ', '').trim();
        }

        try {
            await this.doSubmit();
        } catch {
            if (this.selectedProviderType === TwoFactorProviderType.WebAuthn && this.webAuthn != null) {
                this.webAuthn.start();
            }
        }
    }

    async doSubmit() {
        this.formPromise = this.authService.logInTwoFactor(this.selectedProviderType, this.token, this.remember);
        const response: AuthResult = await this.formPromise;
        const disableFavicon = await this.storageService.get<boolean>(ConstantsService.disableFaviconKey);
        await this.stateService.save(ConstantsService.disableFaviconKey, !!disableFavicon);
        if (this.onSuccessfulLogin != null) {
            this.onSuccessfulLogin();
        }
        if (response.resetMasterPassword) {
            this.successRoute = 'set-password';
        }
        if (this.onSuccessfulLoginNavigate != null) {
            this.onSuccessfulLoginNavigate();
        } else {
            this.router.navigate([this.successRoute], {
                queryParams: {
                    identifier: this.identifier,
                },
            });
        }
    }

    async sendEmail(doToast: boolean) {
        if (this.selectedProviderType !== TwoFactorProviderType.Email) {
            return;
        }

        if (this.emailPromise != null) {
            return;
        }

        try {
            const request = new TwoFactorEmailRequest(this.authService.email, this.authService.masterPasswordHash);
            this.emailPromise = this.apiService.postTwoFactorEmail(request);
            await this.emailPromise;
            if (doToast) {
                this.platformUtilsService.showToast('success', null,
                    this.i18nService.t('verificationCodeEmailSent', this.twoFactorEmail));
            }
        } catch { }

        this.emailPromise = null;
    }

    authWebAuthn() {
        const providerData = this.authService.twoFactorProvidersData.get(this.selectedProviderType);

        if (!this.webAuthnSupported || this.webAuthn == null) {
            return;
        }

        this.webAuthn.init(providerData);
    }

    private cleanupWebAuthn() {
        if (this.webAuthn != null) {
            this.webAuthn.stop();
            this.webAuthn.cleanup();
        }
    }

    get authing(): boolean {
        return this.authService.authingWithPassword() || this.authService.authingWithSso() || this.authService.authingWithApiKey();
    }

    get needsLock(): boolean {
        return this.authService.authingWithSso() || this.authService.authingWithApiKey();
    }
}