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

import { first } from 'rxjs/operators';

import { ApiService } from 'jslib-common/abstractions/api.service';
import { CryptoService } from 'jslib-common/abstractions/crypto.service';
import { I18nService } from 'jslib-common/abstractions/i18n.service';
import { MessagingService } from 'jslib-common/abstractions/messaging.service';
import { PasswordGenerationService } from 'jslib-common/abstractions/passwordGeneration.service';
import { PlatformUtilsService } from 'jslib-common/abstractions/platformUtils.service';
import { PolicyService } from 'jslib-common/abstractions/policy.service';
import { StateService } from 'jslib-common/abstractions/state.service';
import { SyncService } from 'jslib-common/abstractions/sync.service';

import { EncString } from 'jslib-common/models/domain/encString';
import { SymmetricCryptoKey } from 'jslib-common/models/domain/symmetricCryptoKey';

import { KeysRequest } from 'jslib-common/models/request/keysRequest';
import { OrganizationUserResetPasswordEnrollmentRequest } from 'jslib-common/models/request/organizationUserResetPasswordEnrollmentRequest';
import { SetPasswordRequest } from 'jslib-common/models/request/setPasswordRequest';

import { ChangePasswordComponent as BaseChangePasswordComponent } from './change-password.component';

import { HashPurpose } from 'jslib-common/enums/hashPurpose';
import { KdfType } from 'jslib-common/enums/kdfType';

import { Utils } from 'jslib-common/misc/utils';

@Directive()
export class SetPasswordComponent extends BaseChangePasswordComponent {
    syncLoading: boolean = true;
    showPassword: boolean = false;
    hint: string = '';
    identifier: string = null;
    orgId: string;
    resetPasswordAutoEnroll = false;

    onSuccessfulChangePassword: () => Promise<any>;
    successRoute = 'vault';

    constructor(i18nService: I18nService, cryptoService: CryptoService,
        messagingService: MessagingService, passwordGenerationService: PasswordGenerationService,
        platformUtilsService: PlatformUtilsService, policyService: PolicyService,
        protected router: Router, private apiService: ApiService,
        private syncService: SyncService, private route: ActivatedRoute, stateService: StateService) {
        super(i18nService, cryptoService, messagingService, passwordGenerationService,
            platformUtilsService, policyService, stateService);
    }

    async ngOnInit() {
        await this.syncService.fullSync(true);
        this.syncLoading = false;

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

        // Automatic Enrollment Detection
        if (this.identifier != null) {
            try {
                const response = await this.apiService.getOrganizationAutoEnrollStatus(this.identifier);
                this.orgId = response.id;
                this.resetPasswordAutoEnroll = response.resetPasswordEnabled;
            } catch {
                this.platformUtilsService.showToast('error', null, this.i18nService.t('errorOccurred'));
            }
        }

        super.ngOnInit();
    }

    async setupSubmitActions() {
        this.kdf = KdfType.PBKDF2_SHA256;
        const useLowerKdf = this.platformUtilsService.isIE();
        this.kdfIterations = useLowerKdf ? 10000 : 100000;
        return true;
    }

    async performSubmitActions(masterPasswordHash: string, key: SymmetricCryptoKey,
        encKey: [SymmetricCryptoKey, EncString]) {
        const keys = await this.cryptoService.makeKeyPair(encKey[0]);
        const request = new SetPasswordRequest(
            masterPasswordHash,
            encKey[1].encryptedString,
            this.hint,
            this.kdf,
            this.kdfIterations,
            this.identifier,
            new KeysRequest(keys[0], keys[1].encryptedString)
        );
        try {
            if (this.resetPasswordAutoEnroll) {
                this.formPromise = this.apiService.setPassword(request).then(async () => {
                    await this.onSetPasswordSuccess(key, encKey, keys);
                    return this.apiService.getOrganizationKeys(this.orgId);
                }).then(async response => {
                    if (response == null) {
                        throw new Error(this.i18nService.t('resetPasswordOrgKeysError'));
                    }
                    const userId = await this.stateService.getUserId();
                    const publicKey = Utils.fromB64ToArray(response.publicKey);

                    // RSA Encrypt user's encKey.key with organization public key
                    const userEncKey = await this.cryptoService.getEncKey();
                    const encryptedKey = await this.cryptoService.rsaEncrypt(userEncKey.key, publicKey.buffer);

                    const resetRequest = new OrganizationUserResetPasswordEnrollmentRequest();
                    resetRequest.resetPasswordKey = encryptedKey.encryptedString;

                    return this.apiService.putOrganizationUserResetPasswordEnrollment(this.orgId, userId, resetRequest);
                });
            } else {
                this.formPromise = this.apiService.setPassword(request).then(async () => {
                    await this.onSetPasswordSuccess(key, encKey, keys);
                });
            }

            await this.formPromise;

            if (this.onSuccessfulChangePassword != null) {
                this.onSuccessfulChangePassword();
            } else {
                this.router.navigate([this.successRoute]);
            }
        } catch {
            this.platformUtilsService.showToast('error', null, this.i18nService.t('errorOccurred'));
        }
    }

    togglePassword(confirmField: boolean) {
        this.showPassword = !this.showPassword;
        document.getElementById(confirmField ? 'masterPasswordRetype' : 'masterPassword').focus();
    }

    private async onSetPasswordSuccess(key: SymmetricCryptoKey, encKey: [SymmetricCryptoKey, EncString], keys: [string, EncString]) {
        await this.stateService.setKdfType(this.kdf);
        await this.stateService.setKdfIterations(this.kdfIterations);
        await this.cryptoService.setKey(key);
        await this.cryptoService.setEncKey(encKey[1].encryptedString);
        await this.cryptoService.setEncPrivateKey(keys[1].encryptedString);

        const localKeyHash = await this.cryptoService.hashPassword(this.masterPassword, key,
            HashPurpose.LocalAuthorization);
        await this.cryptoService.setKeyHash(localKeyHash);
    }
}