/*
Copyright 2016 Aviral Dasgupta
Copyright 2016 OpenMarket Ltd
Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
Copyright 2018 - 2021 New Vector Ltd
Copyright 2022 Šimon Brandner <simon.bra.ag@gmail.com>

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 { UpdateCheckStatus, UpdateStatus } from "matrix-react-sdk/src/BasePlatform";
import BaseEventIndexManager from "matrix-react-sdk/src/indexing/BaseEventIndexManager";
import dis from "matrix-react-sdk/src/dispatcher/dispatcher";
import SdkConfig from "matrix-react-sdk/src/SdkConfig";
import { IConfigOptions } from "matrix-react-sdk/src/IConfigOptions";
import * as rageshake from "matrix-react-sdk/src/rageshake/rageshake";
import { MatrixClient } from "matrix-js-sdk/src/client";
import { Room } from "matrix-js-sdk/src/models/room";
import Modal from "matrix-react-sdk/src/Modal";
import InfoDialog from "matrix-react-sdk/src/components/views/dialogs/InfoDialog";
import Spinner from "matrix-react-sdk/src/components/views/elements/Spinner";
import React from "react";
import { randomString } from "matrix-js-sdk/src/randomstring";
import { Action } from "matrix-react-sdk/src/dispatcher/actions";
import { ActionPayload } from "matrix-react-sdk/src/dispatcher/payloads";
import { showToast as showUpdateToast } from "matrix-react-sdk/src/toasts/UpdateToast";
import { CheckUpdatesPayload } from "matrix-react-sdk/src/dispatcher/payloads/CheckUpdatesPayload";
import ToastStore from "matrix-react-sdk/src/stores/ToastStore";
import GenericExpiringToast from "matrix-react-sdk/src/components/views/toasts/GenericExpiringToast";
import { logger } from "matrix-js-sdk/src/logger";
import { MatrixEvent } from "matrix-js-sdk/src/models/event";
import { BreadcrumbsStore } from "matrix-react-sdk/src/stores/BreadcrumbsStore";
import { UPDATE_EVENT } from "matrix-react-sdk/src/stores/AsyncStore";
import { avatarUrlForRoom, getInitialLetter } from "matrix-react-sdk/src/Avatar";
import DesktopCapturerSourcePicker from "matrix-react-sdk/src/components/views/elements/DesktopCapturerSourcePicker";
import { OidcRegistrationClientMetadata } from "matrix-js-sdk/src/matrix";

import VectorBasePlatform from "./VectorBasePlatform";
import { SeshatIndexManager } from "./SeshatIndexManager";
import { IPCManager } from "./IPCManager";
import { _t } from "../../languageHandler";

interface SquirrelUpdate {
    releaseNotes: string;
    releaseName: string;
    releaseDate: Date;
    updateURL: string;
}

const SSO_ID_KEY = "element-desktop-ssoid";

const isMac = navigator.platform.toUpperCase().includes("MAC");

function platformFriendlyName(): string {
    // used to use window.process but the same info is available here
    if (navigator.userAgent.includes("Macintosh")) {
        return "macOS";
    } else if (navigator.userAgent.includes("FreeBSD")) {
        return "FreeBSD";
    } else if (navigator.userAgent.includes("OpenBSD")) {
        return "OpenBSD";
    } else if (navigator.userAgent.includes("SunOS")) {
        return "SunOS";
    } else if (navigator.userAgent.includes("Windows")) {
        return "Windows";
    } else if (navigator.userAgent.includes("Linux")) {
        return "Linux";
    } else {
        return "Unknown";
    }
}

function onAction(payload: ActionPayload): void {
    // Whitelist payload actions, no point sending most across
    if (["call_state"].includes(payload.action)) {
        window.electron!.send("app_onAction", payload);
    }
}

function getUpdateCheckStatus(status: boolean | string): UpdateStatus {
    if (status === true) {
        return { status: UpdateCheckStatus.Downloading };
    } else if (status === false) {
        return { status: UpdateCheckStatus.NotAvailable };
    } else {
        return {
            status: UpdateCheckStatus.Error,
            detail: status,
        };
    }
}

export default class ElectronPlatform extends VectorBasePlatform {
    private readonly ipc = new IPCManager("ipcCall", "ipcReply");
    private readonly eventIndexManager: BaseEventIndexManager = new SeshatIndexManager();
    // this is the opaque token we pass to the HS which when we get it in our callback we can resolve to a profile
    private readonly ssoID: string = randomString(32);

    public constructor() {
        super();

        if (!window.electron) {
            throw new Error("Cannot instantiate ElectronPlatform, window.electron is not set");
        }

        dis.register(onAction);
        /*
            IPC Call `check_updates` returns:
            true if there is an update available
            false if there is not
            or the error if one is encountered
         */
        window.electron.on("check_updates", (event, status) => {
            dis.dispatch<CheckUpdatesPayload>({
                action: Action.CheckUpdates,
                ...getUpdateCheckStatus(status),
            });
        });

        // try to flush the rageshake logs to indexeddb before quit.
        window.electron.on("before-quit", function () {
            logger.log("element-desktop closing");
            rageshake.flush();
        });

        window.electron.on("update-downloaded", this.onUpdateDownloaded);

        window.electron.on("preferences", () => {
            dis.fire(Action.ViewUserSettings);
        });

        window.electron.on("userDownloadCompleted", (ev, { id, name }) => {
            const key = `DOWNLOAD_TOAST_${id}`;

            const onAccept = (): void => {
                window.electron!.send("userDownloadAction", { id, open: true });
                ToastStore.sharedInstance().dismissToast(key);
            };

            const onDismiss = (): void => {
                window.electron!.send("userDownloadAction", { id });
            };

            ToastStore.sharedInstance().addOrReplaceToast({
                key,
                title: _t("download_completed"),
                props: {
                    description: name,
                    acceptLabel: _t("action|open"),
                    onAccept,
                    dismissLabel: _t("action|dismiss"),
                    onDismiss,
                    numSeconds: 10,
                },
                component: GenericExpiringToast,
                priority: 99,
            });
        });

        window.electron.on("openDesktopCapturerSourcePicker", () => {
            const { finished } = Modal.createDialog(DesktopCapturerSourcePicker);
            finished.then(([source]) => {
                if (!source) return;
                this.ipc.call("callDisplayMediaCallback", source);
            });
        });

        this.ipc.call("startSSOFlow", this.ssoID);

        BreadcrumbsStore.instance.on(UPDATE_EVENT, this.onBreadcrumbsUpdate);
    }

    public async getConfig(): Promise<IConfigOptions | undefined> {
        return this.ipc.call("getConfig");
    }

    private onBreadcrumbsUpdate = (): void => {
        const rooms = BreadcrumbsStore.instance.rooms.slice(0, 7).map((r) => ({
            roomId: r.roomId,
            avatarUrl: avatarUrlForRoom(
                r,
                Math.floor(60 * window.devicePixelRatio),
                Math.floor(60 * window.devicePixelRatio),
                "crop",
            ),
            initial: getInitialLetter(r.name),
        }));
        this.ipc.call("breadcrumbs", rooms);
    };

    private onUpdateDownloaded = async (ev: Event, { releaseNotes, releaseName }: SquirrelUpdate): Promise<void> => {
        dis.dispatch<CheckUpdatesPayload>({
            action: Action.CheckUpdates,
            status: UpdateCheckStatus.Ready,
        });
        if (this.shouldShowUpdate(releaseName)) {
            showUpdateToast(await this.getAppVersion(), releaseName, releaseNotes);
        }
    };

    public getHumanReadableName(): string {
        return "Electron Platform"; // no translation required: only used for analytics
    }

    /**
     * Return true if platform supports multi-language
     * spell-checking, otherwise false.
     */
    public supportsSpellCheckSettings(): boolean {
        return true;
    }

    public allowOverridingNativeContextMenus(): boolean {
        return true;
    }

    public setNotificationCount(count: number): void {
        if (this.notificationCount === count) return;
        super.setNotificationCount(count);

        window.electron!.send("setBadgeCount", count);
    }

    public supportsNotifications(): boolean {
        return true;
    }

    public maySendNotifications(): boolean {
        return true;
    }

    public displayNotification(
        title: string,
        msg: string,
        avatarUrl: string,
        room: Room,
        ev?: MatrixEvent,
    ): Notification {
        // GNOME notification spec parses HTML tags for styling...
        // Electron Docs state all supported linux notification systems follow this markup spec
        // https://github.com/electron/electron/blob/master/docs/tutorial/desktop-environment-integration.md#linux
        // maybe we should pass basic styling (italics, bold, underline) through from MD
        // we only have to strip out < and > as the spec doesn't include anything about things like &amp;
        // so we shouldn't assume that all implementations will treat those properly. Very basic tag parsing is done.
        if (navigator.userAgent.includes("Linux")) {
            msg = msg.replace(/</g, "&lt;").replace(/>/g, "&gt;");
        }

        const notification = super.displayNotification(title, msg, avatarUrl, room, ev);

        const handler = notification.onclick as Function;
        notification.onclick = (): void => {
            handler?.();
            this.ipc.call("focusWindow");
        };

        return notification;
    }

    public loudNotification(ev: MatrixEvent, room: Room): void {
        window.electron!.send("loudNotification");
    }

    public needsUrlTooltips(): boolean {
        return true;
    }

    public async getAppVersion(): Promise<string> {
        return this.ipc.call("getAppVersion");
    }

    public supportsSetting(settingName?: string): boolean {
        switch (settingName) {
            case "Electron.showTrayIcon": // Things other than Mac support tray icons
            case "Electron.alwaysShowMenuBar": // This isn't relevant on Mac as Menu bars don't live in the app window
                return !isMac;
            default:
                return true;
        }
    }

    public getSettingValue(settingName: string): Promise<any> {
        return this.ipc.call("getSettingValue", settingName);
    }

    public setSettingValue(settingName: string, value: any): Promise<void> {
        return this.ipc.call("setSettingValue", settingName, value);
    }

    public async canSelfUpdate(): Promise<boolean> {
        const feedUrl = await this.ipc.call("getUpdateFeedUrl");
        return Boolean(feedUrl);
    }

    public startUpdateCheck(): void {
        super.startUpdateCheck();
        window.electron!.send("check_updates");
    }

    public installUpdate(): void {
        // IPC to the main process to install the update, since quitAndInstall
        // doesn't fire the before-quit event so the main process needs to know
        // it should exit.
        window.electron!.send("install_update");
    }

    public getDefaultDeviceDisplayName(): string {
        const brand = SdkConfig.get().brand;
        return _t("desktop_default_device_name", {
            brand,
            platformName: platformFriendlyName(),
        });
    }

    public requestNotificationPermission(): Promise<string> {
        return Promise.resolve("granted");
    }

    public reload(): void {
        window.location.reload();
    }

    public getEventIndexingManager(): BaseEventIndexManager | null {
        return this.eventIndexManager;
    }

    public async setLanguage(preferredLangs: string[]): Promise<any> {
        return this.ipc.call("setLanguage", preferredLangs);
    }

    public setSpellCheckEnabled(enabled: boolean): void {
        this.ipc.call("setSpellCheckEnabled", enabled).catch((error) => {
            logger.log("Failed to send setSpellCheckEnabled IPC to Electron");
            logger.error(error);
        });
    }

    public async getSpellCheckEnabled(): Promise<boolean> {
        return this.ipc.call("getSpellCheckEnabled");
    }

    public setSpellCheckLanguages(preferredLangs: string[]): void {
        this.ipc.call("setSpellCheckLanguages", preferredLangs).catch((error) => {
            logger.log("Failed to send setSpellCheckLanguages IPC to Electron");
            logger.error(error);
        });
    }

    public async getSpellCheckLanguages(): Promise<string[]> {
        return this.ipc.call("getSpellCheckLanguages");
    }

    public async getDesktopCapturerSources(options: GetSourcesOptions): Promise<Array<DesktopCapturerSource>> {
        return this.ipc.call("getDesktopCapturerSources", options);
    }

    public supportsDesktopCapturer(): boolean {
        return true;
    }

    public supportsJitsiScreensharing(): boolean {
        // See https://github.com/element-hq/element-web/issues/4880
        return false;
    }

    public async getAvailableSpellCheckLanguages(): Promise<string[]> {
        return this.ipc.call("getAvailableSpellCheckLanguages");
    }

    public getSSOCallbackUrl(fragmentAfterLogin: string): URL {
        const url = super.getSSOCallbackUrl(fragmentAfterLogin);
        url.protocol = "element";
        url.searchParams.set(SSO_ID_KEY, this.ssoID);
        return url;
    }

    public startSingleSignOn(
        mxClient: MatrixClient,
        loginType: "sso" | "cas",
        fragmentAfterLogin: string,
        idpId?: string,
    ): void {
        // this will get intercepted by electron-main will-navigate
        super.startSingleSignOn(mxClient, loginType, fragmentAfterLogin, idpId);
        Modal.createDialog(InfoDialog, {
            title: _t("auth|sso_complete_in_browser_dialog_title"),
            description: <Spinner />,
        });
    }

    public navigateForwardBack(back: boolean): void {
        this.ipc.call(back ? "navigateBack" : "navigateForward");
    }

    public overrideBrowserShortcuts(): boolean {
        return true;
    }

    public async getPickleKey(userId: string, deviceId: string): Promise<string | null> {
        try {
            return await this.ipc.call("getPickleKey", userId, deviceId);
        } catch (e) {
            // if we can't connect to the password storage, assume there's no
            // pickle key
            return null;
        }
    }

    public async createPickleKey(userId: string, deviceId: string): Promise<string | null> {
        try {
            return await this.ipc.call("createPickleKey", userId, deviceId);
        } catch (e) {
            // if we can't connect to the password storage, assume there's no
            // pickle key
            return null;
        }
    }

    public async destroyPickleKey(userId: string, deviceId: string): Promise<void> {
        try {
            await this.ipc.call("destroyPickleKey", userId, deviceId);
        } catch (e) {}
    }

    public async clearStorage(): Promise<void> {
        try {
            await super.clearStorage();
            await this.ipc.call("clearStorage");
        } catch (e) {}
    }

    public get baseUrl(): string {
        // This configuration is element-desktop specific so the types here do not know about it
        return (SdkConfig.get() as unknown as Record<string, string>)["web_base_url"] ?? "https://app.element.io";
    }

    public async getOidcClientMetadata(): Promise<OidcRegistrationClientMetadata> {
        const baseMetadata = await super.getOidcClientMetadata();
        return {
            ...baseMetadata,
            applicationType: "native",
            // XXX: This should be overridable in config
            clientUri: "https://element.io",
        };
    }

    public getOidcClientState(): string {
        return `:${SSO_ID_KEY}:${this.ssoID}`;
    }
}
