// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import {Alert, DeviceEventEmitter, Linking, NativeEventEmitter, NativeModules} from 'react-native';
import RNLocalize from 'react-native-localize';
import semver from 'semver';

import {switchToChannelById} from '@actions/remote/channel';
import {autoUpdateTimezone} from '@actions/remote/user';
import LocalConfig from '@assets/config.json';
import {Device, Events, Sso} from '@constants';
import {MIN_REQUIRED_VERSION} from '@constants/supported_server';
import DatabaseManager from '@database/manager';
import {DEFAULT_LOCALE, getTranslations, t} from '@i18n';
import {getServerCredentials} from '@init/credentials';
import * as analytics from '@managers/analytics';
import {getAllServers, getActiveServerUrl} from '@queries/app/servers';
import {queryTeamDefaultChannel} from '@queries/servers/channel';
import {getCommonSystemValues} from '@queries/servers/system';
import {getTeamChannelHistory} from '@queries/servers/team';
import {setScreensOrientation} from '@screens/navigation';
import {handleDeepLink} from '@utils/deep_link';
import {logError} from '@utils/log';

type LinkingCallbackArg = {url: string};

const {SplitView} = NativeModules;
const splitViewEmitter = new NativeEventEmitter(SplitView);

class GlobalEventHandler {
    JavascriptAndNativeErrorHandler: jsAndNativeErrorHandler | undefined;

    constructor() {
        DeviceEventEmitter.addListener(Events.SERVER_VERSION_CHANGED, this.onServerVersionChanged);
        DeviceEventEmitter.addListener(Events.CONFIG_CHANGED, this.onServerConfigChanged);
        RNLocalize.addEventListener('change', async () => {
            try {
                const servers = await getAllServers();
                for (const server of servers) {
                    if (server.url && server.lastActiveAt > 0) {
                        autoUpdateTimezone(server.url);
                    }
                }
            } catch (e) {
                logError('Localize change', e);
            }
        });

        splitViewEmitter.addListener('SplitViewChanged', this.onSplitViewChanged);
        Linking.addEventListener('url', this.onDeepLink);
    }

    init = () => {
        this.JavascriptAndNativeErrorHandler = require('@utils/error_handling').default;
        this.JavascriptAndNativeErrorHandler?.initializeErrorHandling();
    };

    configureAnalytics = async (serverUrl: string, config?: ClientConfig) => {
        if (serverUrl && config?.DiagnosticsEnabled === 'true' && config?.DiagnosticId && LocalConfig.RudderApiKey) {
            let client = analytics.get(serverUrl);
            if (!client) {
                client = analytics.create(serverUrl);
            }

            await client.init(config);
        }
    };

    onDeepLink = (event: LinkingCallbackArg) => {
        if (event.url?.startsWith(Sso.REDIRECT_URL_SCHEME) || event.url?.startsWith(Sso.REDIRECT_URL_SCHEME_DEV)) {
            return;
        }

        if (event.url) {
            handleDeepLink(event.url);
        }
    };

    onServerConfigChanged = ({serverUrl, config}: {serverUrl: string; config: ClientConfig}) => {
        this.configureAnalytics(serverUrl, config);
    };

    onServerVersionChanged = async ({serverUrl, serverVersion}: {serverUrl: string; serverVersion?: string}) => {
        const match = serverVersion?.match(/^[0-9]*.[0-9]*.[0-9]*(-[a-zA-Z0-9.-]*)?/g);
        const version = match && match[0];
        const locale = DEFAULT_LOCALE;
        const translations = getTranslations(locale);

        if (version) {
            if (semver.valid(version) && semver.lt(version, MIN_REQUIRED_VERSION)) {
                Alert.alert(
                    translations[t('mobile.server_upgrade.title')],
                    translations[t('mobile.server_upgrade.description')],
                    [{
                        text: translations[t('mobile.server_upgrade.button')],
                        onPress: () => this.serverUpgradeNeeded(serverUrl),
                    }],
                    {cancelable: false},
                );
            }
        }
    };

    onSplitViewChanged = async (result: SplitViewResult) => {
        if (result.isTablet != null && Device.IS_TABLET !== result.isTablet) {
            Device.IS_TABLET = result.isTablet;
            const serverUrl = await getActiveServerUrl();
            if (serverUrl && result.isTablet) {
                try {
                    const {database} = DatabaseManager.getServerDatabaseAndOperator(serverUrl);
                    const {currentChannelId, currentTeamId} = await getCommonSystemValues(database);
                    if (currentTeamId && !currentChannelId) {
                        let channelId = '';
                        const teamChannelHistory = await getTeamChannelHistory(database, currentTeamId);
                        if (teamChannelHistory.length) {
                            channelId = teamChannelHistory[0];
                        } else {
                            const defaultChannel = await queryTeamDefaultChannel(database, currentTeamId).fetch();
                            if (defaultChannel.length) {
                                channelId = defaultChannel[0].id;
                            }
                        }

                        if (channelId) {
                            switchToChannelById(serverUrl, channelId);
                        }
                    }
                } catch {
                    // do nothing, the UI will not show a channel but that is fixed when the user picks one.
                }
            }
            setScreensOrientation(result.isTablet);
        }
    };

    serverUpgradeNeeded = async (serverUrl: string) => {
        const credentials = await getServerCredentials(serverUrl);

        if (credentials) {
            DeviceEventEmitter.emit(Events.SERVER_LOGOUT, {serverUrl, removeServer: false});
        }
    };
}

export default new GlobalEventHandler();