import * as electronRemote from '@electron/remote';
const electronConsole = electronRemote.getGlobal('console') as Console;
import Logger from '../../logger/logger';
const LOG = Logger.create(__filename, electronConsole);

import Util from './util';

import Globals from './globals';

import { $, $$, $$$, $$$$ } from './elements/require/q-module';
import UI from './ui';
import ClientController from './client-controller';
import { Channel } from './data-types';

export default class Actions {
    private document: Document;
    private ui: UI;

    constructor (document: Document, ui: UI) {
        this.document = document;
        this.ui = ui;
    }

    async fetchAndUpdateConnection(server: ClientController) {
        // Explicitly not using withPotentialError to make this simpler
        try {
            let connection = await server.fetchConnectionInfo();
            this.ui.setActiveConnection(server, connection);
        } catch (e) {
            LOG.error('Error updating current connection', e);
            this.ui.setActiveConnection(server, { id: null, avatarResourceId: null, displayName: 'Error', status: 'Error', privileges: [] });
        }
    }
    
    async fetchAndUpdateMembers(server: ClientController) {
        $.setDocument(this.document);
        await Util.withPotentialErrorWarnOnCancel({
            taskFunc: async () => {
                if (!this.ui.isActiveServer(server)) return;
                let members = await server.grabMembers();
                await this.ui.setMembers(server, members);
            },
            errorIndicatorAddFunc: async (errorIndicatorElement) => {
                await this.ui.setMembersErrorIndicator(server, errorIndicatorElement);
            },
            errorContainer: $('#server-members'),
            errorMessage: 'Error loading members'
        });
    }

    async fetchAndUpdateChannels(server: ClientController) {
        $.setDocument(this.document);
        await Util.withPotentialErrorWarnOnCancel({
            taskFunc: async () => {
                if (!this.ui.isActiveServer(server)) return;
                let channels = await server.grabChannels();
                await this.ui.setChannels(server, channels);
                if (!this.ui.isActiveServer(server)) return;
                if (!this.ui.hasActiveChannel()) {
                    // click on the first channel in the list if no channel is active yet
                    let element = $('#channel-list .channel');
                    if (element) {
                        element.click();
                    }
                }
            },
            errorIndicatorAddFunc: async (errorIndicatorElement) => {
                await this.ui.setChannelsErrorIndicator(server, errorIndicatorElement);
            },
            errorContainer: $('#channel-list'),
            errorMessage: 'Error fetching channels'
        });
    }

    async fetchAndUpdateMessagesRecent(server: ClientController, channel: Channel) {
        $.setDocument(this.document);
        await Util.withPotentialErrorWarnOnCancel({
            taskFunc: async () => {
                if (!this.ui.isActiveServer(server) || !this.ui.isActiveChannel(channel)) return;
                let messages = await server.grabRecentMessages(channel.id, Globals.MESSAGES_PER_REQUEST);
                await this.ui.setMessages(server, channel, messages, { atTop: messages.length < Globals.MESSAGES_PER_REQUEST, atBottom: true });
            },
            errorIndicatorAddFunc: async (errorIndicatorElement) => {
                await this.ui.setMessagesErrorIndicator(server, channel, errorIndicatorElement);
            },
            errorContainer: $('#channel-feed'),
            errorMessage: 'Error fetching messages'
        });
    }

    async fetchAndUpdateMessagesBefore(server: ClientController, channel: Channel) {
        $.setDocument(this.document);
        await Util.withPotentialErrorWarnOnCancel({
            taskFunc: async () => {
                if (!this.ui.isActiveServer(server) || !this.ui.isActiveChannel(channel)) return;
                let topPair = this.ui.getTopMessagePair();
                if (topPair == null) return;
                let messages = await server.fetchMessagesBefore(channel.id, topPair.message.id, Globals.MESSAGES_PER_REQUEST);
                if (messages && messages.length > 0) {
                    await this.ui.addMessagesBefore(server, channel, messages, topPair.message);
                } else {
                    this.ui.messagesAtTop = true;
                }
            },
            errorIndicatorAddFunc: async (errorIndicatorElement) => {
                await this.ui.addMessagesErrorIndicatorBefore(server, channel, errorIndicatorElement);
            },
            errorContainer: $('#channel-feed'),
            errorClasses: [ 'before' ],
            errorMessage: 'Error loading older messages'
        });
    }

    async fetchAndUpdateMessagesAfter(server: ClientController, channel: Channel) {
        $.setDocument(this.document);
        await Util.withPotentialErrorWarnOnCancel({
            taskFunc: async () => {
                if (!this.ui.isActiveServer(server) || !this.ui.isActiveChannel(channel)) return;
                let bottomPair = this.ui.getBottomMessagePair();
                if (bottomPair == null) return;
                let messages = await server.fetchMessagesAfter(channel.id, bottomPair.message.id, Globals.MESSAGES_PER_REQUEST);
                if (messages && messages.length > 0) {
                    await this.ui.addMessagesAfter(server, channel, messages, bottomPair.message);
                } else {
                    this.ui.messagesAtBottom = true;
                }
            },
            errorIndicatorAddFunc: async (errorIndicatorElement) => {
                await this.ui.addMessagesErrorIndicatorAfter(server, channel, errorIndicatorElement);
            },
            errorContainer: $('#channel-feed'),
            errorClasses: [ 'after' ],
            errorMessage: 'Error loading newer messages'
        });
    }
}