import { DatePipe } from '@angular/common';
import {
    Directive,
    EventEmitter,
    Input,
    OnInit,
    Output
} from '@angular/core';

import { PolicyType } from 'jslib-common/enums/policyType';
import { SendType } from 'jslib-common/enums/sendType';

import { EnvironmentService } from 'jslib-common/abstractions/environment.service';
import { I18nService } from 'jslib-common/abstractions/i18n.service';
import { LogService } from 'jslib-common/abstractions/log.service';
import { MessagingService } from 'jslib-common/abstractions/messaging.service';
import { PlatformUtilsService } from 'jslib-common/abstractions/platformUtils.service';
import { PolicyService } from 'jslib-common/abstractions/policy.service';
import { SendService } from 'jslib-common/abstractions/send.service';
import { UserService } from 'jslib-common/abstractions/user.service';

import { SendFileView } from 'jslib-common/models/view/sendFileView';
import { SendTextView } from 'jslib-common/models/view/sendTextView';
import { SendView } from 'jslib-common/models/view/sendView';

import { EncArrayBuffer } from 'jslib-common/models/domain/encArrayBuffer';
import { Send } from 'jslib-common/models/domain/send';

@Directive()
export class AddEditComponent implements OnInit {
    @Input() sendId: string;
    @Input() type: SendType;

    @Output() onSavedSend = new EventEmitter<SendView>();
    @Output() onDeletedSend = new EventEmitter<SendView>();
    @Output() onCancelled = new EventEmitter<SendView>();

    copyLink = false;
    disableSend = false;
    disableHideEmail = false;
    send: SendView;
    deletionDate: string;
    expirationDate: string;
    hasPassword: boolean;
    password: string;
    showPassword = false;
    formPromise: Promise<any>;
    deletePromise: Promise<any>;
    sendType = SendType;
    typeOptions: any[];
    canAccessPremium = true;
    emailVerified = true;
    alertShown = false;
    showOptions = false;

    private sendLinkBaseUrl: string;

    constructor(protected i18nService: I18nService, protected platformUtilsService: PlatformUtilsService,
        protected environmentService: EnvironmentService, protected datePipe: DatePipe,
        protected sendService: SendService, protected userService: UserService,
        protected messagingService: MessagingService, protected policyService: PolicyService,
        private logService: LogService) {
        this.typeOptions = [
            { name: i18nService.t('sendTypeFile'), value: SendType.File },
            { name: i18nService.t('sendTypeText'), value: SendType.Text },
        ];
        this.sendLinkBaseUrl = this.environmentService.getSendUrl();
    }

    get link(): string {
        if (this.send.id != null && this.send.accessId != null) {
            return this.sendLinkBaseUrl + this.send.accessId + '/' + this.send.urlB64Key;
        }
        return null;
    }

    get isSafari() {
        return this.platformUtilsService.isSafari();
    }

    get isDateTimeLocalSupported(): boolean {
        return !(this.platformUtilsService.isFirefox() || this.platformUtilsService.isSafari());
    }

    async ngOnInit() {
        await this.load();
    }

    get editMode(): boolean {
        return this.sendId != null;
    }

    get title(): string {
        return this.i18nService.t(
            this.editMode ?
                'editSend' :
                'createSend'
        );
    }

    setDates(event: {deletionDate: string, expirationDate: string}) {
        this.deletionDate = event.deletionDate;
        this.expirationDate = event.expirationDate;
    }

    async load() {
        this.disableSend = await this.policyService.policyAppliesToUser(PolicyType.DisableSend);
        this.disableHideEmail = await this.policyService.policyAppliesToUser(PolicyType.SendOptions,
            p => p.data.disableHideEmail);

        this.canAccessPremium = await this.userService.canAccessPremium();
        this.emailVerified = await this.userService.getEmailVerified();
        if (!this.canAccessPremium || !this.emailVerified) {
            this.type = SendType.Text;
        }

        if (this.send == null) {
            if (this.editMode) {
                const send = await this.loadSend();
                this.send = await send.decrypt();
            } else {
                this.send = new SendView();
                this.send.type = this.type == null ? SendType.File : this.type;
                this.send.file = new SendFileView();
                this.send.text = new SendTextView();
                this.send.deletionDate = new Date();
                this.send.deletionDate.setDate(this.send.deletionDate.getDate() + 7);
            }
        }

        this.hasPassword = this.send.password != null && this.send.password.trim() !== '';
    }

    async submit(): Promise<boolean> {
        if (this.disableSend) {
            this.platformUtilsService.showToast('error', this.i18nService.t('errorOccurred'),
                this.i18nService.t('sendDisabledWarning'));
            return false;
        }

        if (this.send.name == null || this.send.name === '') {
            this.platformUtilsService.showToast('error', this.i18nService.t('errorOccurred'),
                this.i18nService.t('nameRequired'));
            return false;
        }

        let file: File = null;
        if (this.send.type === SendType.File && !this.editMode) {
            const fileEl = document.getElementById('file') as HTMLInputElement;
            const files = fileEl.files;
            if (files == null || files.length === 0) {
                this.platformUtilsService.showToast('error', this.i18nService.t('errorOccurred'),
                    this.i18nService.t('selectFile'));
                return;
            }

            file = files[0];
            if (files[0].size > 524288000) { // 500 MB
                this.platformUtilsService.showToast('error', this.i18nService.t('errorOccurred'),
                    this.i18nService.t('maxFileSize'));
                return;
            }
        }

        if (this.password != null && this.password.trim() === '') {
            this.password = null;
        }

        this.formPromise = this.encryptSend(file)
            .then(async encSend => {
                const uploadPromise = this.sendService.saveWithServer(encSend);
                await uploadPromise;
                if (this.send.id == null) {
                    this.send.id = encSend[0].id;
                }
                if (this.send.accessId == null) {
                    this.send.accessId = encSend[0].accessId;
                }
                this.onSavedSend.emit(this.send);
                if (this.copyLink && this.link != null) {
                    const copySuccess = await this.copyLinkToClipboard(this.link);
                    if (copySuccess ?? true) {
                        this.platformUtilsService.showToast('success', null,
                            this.i18nService.t(this.editMode ? 'editedSend' : 'createdSend'));
                    } else {
                        await this.platformUtilsService.showDialog(
                            this.i18nService.t(this.editMode ? 'editedSend' : 'createdSend'), null,
                            this.i18nService.t('ok'), null, 'success', null);
                        await this.copyLinkToClipboard(this.link);
                    }
                }
            });
        try {
            await this.formPromise;
            return true;
        } catch (e) {
            this.logService.error(e);
        }
        return false;
    }

    async copyLinkToClipboard(link: string): Promise<void | boolean> {
        return Promise.resolve(this.platformUtilsService.copyToClipboard(link));
    }

    async delete(): Promise<boolean> {
        if (this.deletePromise != null) {
            return false;
        }
        const confirmed = await this.platformUtilsService.showDialog(
            this.i18nService.t('deleteSendConfirmation'),
            this.i18nService.t('deleteSend'),
            this.i18nService.t('yes'), this.i18nService.t('no'), 'warning');
        if (!confirmed) {
            return false;
        }

        try {
            this.deletePromise = this.sendService.deleteWithServer(this.send.id);
            await this.deletePromise;
            this.platformUtilsService.showToast('success', null, this.i18nService.t('deletedSend'));
            await this.load();
            this.onDeletedSend.emit(this.send);
            return true;
        } catch (e) {
            this.logService.error(e);
        }

        return false;
    }

    typeChanged() {
        if (this.send.type === SendType.File && !this.alertShown) {
            if (!this.canAccessPremium) {
                this.alertShown = true;
                this.messagingService.send('premiumRequired');
            } else if (!this.emailVerified) {
                this.alertShown = true;
                this.messagingService.send('emailVerificationRequired');
            }
        }
    }

    toggleOptions() {
        this.showOptions = !this.showOptions;
    }

    protected async loadSend(): Promise<Send> {
        return this.sendService.get(this.sendId);
    }

    protected async encryptSend(file: File): Promise<[Send, EncArrayBuffer]> {
        const sendData = await this.sendService.encrypt(this.send, file, this.password, null);

        // Parse dates
        try {
            sendData[0].deletionDate = this.deletionDate == null ? null : new Date(this.deletionDate);
        } catch {
            sendData[0].deletionDate = null;
        }
        try {
            sendData[0].expirationDate = this.expirationDate == null ? null : new Date(this.expirationDate);
        } catch {
            sendData[0].expirationDate = null;
        }

        return sendData;
    }

    protected togglePasswordVisible() {
        this.showPassword = !this.showPassword;
        document.getElementById('password').focus();
    }
}