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

import { CipherService } from 'jslib-common/abstractions/cipher.service';
import { MessagingService } from 'jslib-common/abstractions/messaging.service';
import { PasswordGenerationService } from 'jslib-common/abstractions/passwordGeneration.service';
import { PasswordRepromptService } from 'jslib-common/abstractions/passwordReprompt.service';
import { StateService } from 'jslib-common/abstractions/state.service';

import { ModalService } from 'jslib-angular/services/modal.service';

import { CipherView } from 'jslib-common/models/view/cipherView';

import { CipherType } from 'jslib-common/enums/cipherType';

import { CipherReportComponent } from './cipher-report.component';

@Component({
    selector: 'app-weak-passwords-report',
    templateUrl: 'weak-passwords-report.component.html',
})
export class WeakPasswordsReportComponent extends CipherReportComponent implements OnInit {

    passwordStrengthMap = new Map<string, [string, string]>();

    private passwordStrengthCache = new Map<string, number>();

    constructor(protected cipherService: CipherService, protected passwordGenerationService: PasswordGenerationService,
        modalService: ModalService, messagingService: MessagingService,
        stateService: StateService, passwordRepromptService: PasswordRepromptService) {
        super(modalService, messagingService, true, stateService, passwordRepromptService);
    }

    async ngOnInit() {
        if (await this.checkAccess()) {
            await super.load();
        }
    }

    async setCiphers() {
        const allCiphers = await this.getAllCiphers();
        const weakPasswordCiphers: CipherView[] = [];
        const isUserNameNotEmpty = (c: CipherView): boolean => {
            return c.login.username != null && c.login.username.trim() !== '';
        };
        const getCacheKey = (c: CipherView): string => {
            return c.login.password + '_____' + (isUserNameNotEmpty(c) ? c.login.username : '');
        };

        allCiphers.forEach(c => {
            if (c.type !== CipherType.Login || c.login.password == null || c.login.password === '' || c.isDeleted) {
                return;
            }
            const hasUserName = isUserNameNotEmpty(c);
            const cacheKey = getCacheKey(c);
            if (!this.passwordStrengthCache.has(cacheKey)) {
                let userInput: string[] = [];
                if (hasUserName) {
                    const atPosition = c.login.username.indexOf('@');
                    if (atPosition > -1) {
                        userInput = userInput.concat(
                            c.login.username.substr(0, atPosition).trim().toLowerCase().split(/[^A-Za-z0-9]/))
                            .filter(i => i.length >= 3);
                    } else {
                        userInput = c.login.username.trim().toLowerCase().split(/[^A-Za-z0-9]/)
                            .filter(i => i.length >= 3);
                    }
                }
                const result = this.passwordGenerationService.passwordStrength(c.login.password,
                    userInput.length > 0 ? userInput : null);
                this.passwordStrengthCache.set(cacheKey, result.score);
            }
            const score = this.passwordStrengthCache.get(cacheKey);
            if (score != null && score <= 2) {
                this.passwordStrengthMap.set(c.id, this.scoreKey(score));
                weakPasswordCiphers.push(c);
            }
        });
        weakPasswordCiphers.sort((a, b) => {
            return this.passwordStrengthCache.get(getCacheKey(a)) -
                this.passwordStrengthCache.get(getCacheKey(b));
        });
        this.ciphers = weakPasswordCiphers;
    }

    protected getAllCiphers(): Promise<CipherView[]> {
        return this.cipherService.getAllDecrypted();
    }

    protected canManageCipher(c: CipherView): boolean {
        // this will only ever be false from the org view;
        return true;
    }

    private scoreKey(score: number): [string, string] {
        switch (score) {
            case 4:
                return ['strong', 'success'];
            case 3:
                return ['good', 'primary'];
            case 2:
                return ['weak', 'warning'];
            default:
                return ['veryWeak', 'danger'];
        }
    }
}