// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import path from 'path';

import fs from 'fs-extra';

import {app, BrowserWindow, Menu, Rectangle, Session, session, dialog, nativeImage, screen} from 'electron';
import log, {LevelOption} from 'electron-log';

import {MigrationInfo, TeamWithTabs} from 'types/config';
import {RemoteInfo} from 'types/server';
import {Boundaries} from 'types/utils';

import Config from 'common/config';
import JsonFileManager from 'common/JsonFileManager';
import {MattermostServer} from 'common/servers/MattermostServer';
import {TAB_FOCALBOARD, TAB_MESSAGING, TAB_PLAYBOOKS} from 'common/tabs/TabView';
import urlUtils from 'common/utils/url';
import Utils from 'common/utils/util';

import updateManager from 'main/autoUpdater';
import {migrationInfoPath, updatePaths} from 'main/constants';
import {localizeMessage} from 'main/i18nManager';
import {createMenu as createAppMenu} from 'main/menus/app';
import {createMenu as createTrayMenu} from 'main/menus/tray';
import {ServerInfo} from 'main/server/serverInfo';
import {setTrayMenu} from 'main/tray/tray';
import WindowManager from 'main/windows/windowManager';

import {mainProtocol} from './initialize';

const assetsDir = path.resolve(app.getAppPath(), 'assets');
const appIconURL = path.resolve(assetsDir, 'appicon_with_spacing_32.png');
const appIcon = nativeImage.createFromPath(appIconURL);

export function openDeepLink(deeplinkingUrl: string) {
    try {
        WindowManager.showMainWindow(deeplinkingUrl);
    } catch (err) {
        log.error(`There was an error opening the deeplinking url: ${err}`);
    }
}

export function updateSpellCheckerLocales() {
    if (Config.data?.spellCheckerLocales.length && app.isReady()) {
        session.defaultSession.setSpellCheckerLanguages(Config.data?.spellCheckerLocales);
    }
}

export function updateServerInfos(teams: TeamWithTabs[]) {
    const serverInfos: Array<Promise<RemoteInfo | string | undefined>> = [];
    teams.forEach((team) => {
        const serverInfo = new ServerInfo(new MattermostServer(team.name, team.url));
        serverInfos.push(serverInfo.promise);
    });
    Promise.all(serverInfos).then((data: Array<RemoteInfo | string | undefined>) => {
        const teams = Config.teams;
        teams.forEach((team) => {
            updateServerURL(data, team);
            openExtraTabs(data, team);
        });
        Config.set('teams', teams);
    }).catch((reason: any) => {
        log.error('Error getting server infos', reason);
    });
}

function updateServerURL(data: Array<RemoteInfo | string | undefined>, team: TeamWithTabs) {
    const remoteInfo = data.find((info) => info && typeof info !== 'string' && info.name === team.name) as RemoteInfo;
    if (remoteInfo && remoteInfo.siteURL) {
        team.url = remoteInfo.siteURL;
    }
}

function openExtraTabs(data: Array<RemoteInfo | string | undefined>, team: TeamWithTabs) {
    const remoteInfo = data.find((info) => info && typeof info !== 'string' && info.name === team.name) as RemoteInfo;
    if (remoteInfo) {
        team.tabs.forEach((tab) => {
            if (tab.name !== TAB_MESSAGING && remoteInfo.serverVersion && Utils.isVersionGreaterThanOrEqualTo(remoteInfo.serverVersion, '6.0.0')) {
                if (tab.name === TAB_PLAYBOOKS && remoteInfo.hasPlaybooks && tab.isOpen !== false) {
                    log.info(`opening ${team.name}___${tab.name} on hasPlaybooks`);
                    tab.isOpen = true;
                }
                if (tab.name === TAB_FOCALBOARD && remoteInfo.hasFocalboard && tab.isOpen !== false) {
                    log.info(`opening ${team.name}___${tab.name} on hasFocalboard`);
                    tab.isOpen = true;
                }
            }
        });
    }
}

export function handleUpdateMenuEvent() {
    log.debug('Utils.handleUpdateMenuEvent');

    const aMenu = createAppMenu(Config, updateManager);
    Menu.setApplicationMenu(aMenu);
    aMenu.addListener('menu-will-close', WindowManager.focusBrowserView);

    // set up context menu for tray icon
    if (shouldShowTrayIcon()) {
        const tMenu = createTrayMenu(Config.data!);
        setTrayMenu(tMenu);
    }
}

export function getDeeplinkingURL(args: string[]) {
    if (Array.isArray(args) && args.length) {
    // deeplink urls should always be the last argument, but may not be the first (i.e. Windows with the app already running)
        const url = args[args.length - 1];
        if (url && mainProtocol && url.startsWith(mainProtocol) && urlUtils.isValidURI(url)) {
            return url;
        }
    }
    return undefined;
}

export function shouldShowTrayIcon() {
    return Config.showTrayIcon || process.platform === 'win32';
}

export function wasUpdated(lastAppVersion?: string) {
    return lastAppVersion !== app.getVersion();
}

export function clearAppCache() {
    // TODO: clear cache on browserviews, not in the renderer.
    const mainWindow = WindowManager.getMainWindow();
    if (mainWindow) {
        mainWindow.webContents.session.clearCache().then(mainWindow.reload);
    } else {
    //Wait for mainWindow
        setTimeout(clearAppCache, 100);
    }
}

function isWithinDisplay(state: Rectangle, display: Boundaries) {
    const startsWithinDisplay = !(state.x > display.maxX || state.y > display.maxY || state.x < display.minX || state.y < display.minY);
    if (!startsWithinDisplay) {
        return false;
    }

    // is half the screen within the display?
    const midX = state.x + (state.width / 2);
    const midY = state.y + (state.height / 2);
    return !(midX > display.maxX || midY > display.maxY);
}

function getDisplayBoundaries() {
    const displays = screen.getAllDisplays();

    return displays.map((display) => {
        return {
            maxX: display.workArea.x + display.workArea.width,
            maxY: display.workArea.y + display.workArea.height,
            minX: display.workArea.x,
            minY: display.workArea.y,
            maxWidth: display.workArea.width,
            maxHeight: display.workArea.height,
        };
    });
}

function getValidWindowPosition(state: Rectangle) {
    // Check if the previous position is out of the viewable area
    // (e.g. because the screen has been plugged off)
    const boundaries = getDisplayBoundaries();
    const display = boundaries.find((boundary) => {
        return isWithinDisplay(state, boundary);
    });

    if (typeof display === 'undefined') {
        return {};
    }
    return {x: state.x, y: state.y};
}

export function resizeScreen(browserWindow: BrowserWindow) {
    function handle() {
        log.debug('Utils.resizeScreen.handle');
        const position = browserWindow.getPosition();
        const size = browserWindow.getSize();
        const validPosition = getValidWindowPosition({
            x: position[0],
            y: position[1],
            width: size[0],
            height: size[1],
        });
        if (typeof validPosition.x !== 'undefined' || typeof validPosition.y !== 'undefined') {
            browserWindow.setPosition(validPosition.x || 0, validPosition.y || 0);
        } else {
            browserWindow.center();
        }
    }

    browserWindow.once('restore', handle);
    handle();
}

function flushCookiesStore(session: Session) {
    log.debug('Utils.flushCookiesStore');
    session.cookies.flushStore().catch((err) => {
        log.error(`There was a problem flushing cookies:\n${err}`);
    });
}

export function initCookieManager(session: Session) {
    // Somehow cookies are not immediately saved to disk.
    // So manually flush cookie store to disk on closing the app.
    // https://github.com/electron/electron/issues/8416
    app.on('before-quit', () => {
        flushCookiesStore(session);
    });

    app.on('browser-window-blur', () => {
        flushCookiesStore(session);
    });
}

export function migrateMacAppStore() {
    const migrationPrefs = new JsonFileManager<MigrationInfo>(migrationInfoPath);
    const oldPath = path.join(app.getPath('userData'), '../../../../../../../Library/Application Support/Mattermost');

    // Check if we've already migrated
    if (migrationPrefs.getValue('masConfigs')) {
        return;
    }

    // Check if the files are there to migrate
    try {
        const exists = fs.existsSync(oldPath);
        if (!exists) {
            log.info('MAS: No files to migrate, skipping');
            return;
        }
    } catch (e) {
        log.error('MAS: Failed to check for existing Mattermost Desktop install, skipping', e);
        return;
    }

    const cancelImport = dialog.showMessageBoxSync({
        title: app.name,
        message: localizeMessage('main.app.utils.migrateMacAppStore.dialog.message', 'Import Existing Configuration'),
        detail: localizeMessage('main.app.utils.migrateMacAppStore.dialog.detail', 'It appears that an existing {appName} configuration exists, would you like to import it? You will be asked to pick the correct configuration directory.', {appName: app.name}),
        icon: appIcon,
        buttons: [
            localizeMessage('main.app.utils.migrateMacAppStore.button.selectAndImport', 'Select Directory and Import'),
            localizeMessage('main.app.utils.migrateMacAppStore.button.dontImport', 'Don\'t Import'),
        ],
        type: 'info',
        defaultId: 0,
        cancelId: 1,
    });

    if (cancelImport) {
        migrationPrefs.setValue('masConfigs', true);
        return;
    }

    const result = dialog.showOpenDialogSync({
        defaultPath: oldPath,
        properties: ['openDirectory'],
    });
    if (!(result && result[0])) {
        return;
    }

    try {
        fs.copySync(result[0], app.getPath('userData'));
        updatePaths(true);
        migrationPrefs.setValue('masConfigs', true);
    } catch (e) {
        log.error('MAS: An error occurred importing the existing configuration', e);
    }
}

export function setLoggingLevel(level: LevelOption) {
    log.transports.console.level = level;
    log.transports.file.level = level;
}