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 ElementsUtil from './require/elements-util.js';
import Globals from '../globals';

import { Channel } from '../data-types';
import Q from '../q-module';
import UI from '../ui';
import createUploadOverlayFromPath from './overlay-upload-path';
import createUploadOverlayFromDataTransferItem from './overlay-upload-datatransfer';
import createUploadDropTarget from './overlay-upload-drop-target';
import CombinedGuild from '../guild-combined';

export default function bindTextInputEvents(document: Document, q: Q, ui: UI): void {
	// Send Current Channel Messages
	let sendingMessage = false;
	async function sendCurrentTextMessage() {
		if (sendingMessage) return;
		if (ui.activeGuild === null) return;
		if (ui.activeChannel === null) return;
		
		let text = q.$('#text-input').innerText.trim();  // trimming is not done server-side, just a client-side 'feature'
		if (text == '') return;

		sendingMessage = true;

		let guild = ui.activeGuild as CombinedGuild;
		let channel = ui.activeChannel as Channel;

		if (!guild.isSocketVerified()) {
			LOG.warn('client attempted to send message while not verified');
			q.$('#send-error').innerText = 'Not Connected to Server';
			await ElementsUtil.shakeElement(q.$('#send-error'), 400);
			sendingMessage = false;
			return;
		}

		if (text.length > Globals.MAX_TEXT_MESSAGE_LENGTH) {
			LOG.warn('skipping sending oversized message: ' + text.length + ' > ' + Globals.MAX_TEXT_MESSAGE_LENGTH + ' characters');
			q.$('#send-error').innerText = 'Message too long: ' + text.length + ' > ' + Globals.MAX_TEXT_MESSAGE_LENGTH + ' characters';
			await ElementsUtil.shakeElement(q.$('#send-error'), 400);
			sendingMessage = false;
			return;
		}

		await ui.lockMessages(guild, channel, async () => {
			q.$('#text-input').removeAttribute('contenteditable');
			q.$('#text-input').classList.add('sending');
			try {
				await guild.requestSendMessage(channel.id, text);

				q.$('#send-error').innerText = '';
				q.$('#text-input').innerText = '';
			} catch (e) {
				LOG.error('Error sending message', e);
				q.$('#send-error').innerText = 'Error sending message';
				await ElementsUtil.shakeElement(q.$('#send-error'), 400);
			}
			q.$('#text-input').classList.remove('sending');
			q.$('#text-input').setAttribute('contenteditable', 'plaintext-only');
			q.$('#text-input').focus();
		});

		sendingMessage = false;
	};

	q.$('#text-input').addEventListener('keydown', async (e) => {
		if (!sendingMessage) {
			q.$('#send-error').innerText = ''; // clear out the sending error if the message changes
		}
		if (e.key == 'Enter' && !e.shiftKey) {
			e.preventDefault();
			await sendCurrentTextMessage();
		}
	});

	q.$('#text-input').addEventListener('keyup', (e) => {
		if (e.key == 'Backspace') {
			if (q.$('#text-input').innerText == '\n') { // sometimes, a \n gets left behind
				q.$('#text-input').innerText = '';
			}
		}
	});

	q.$('#send-error').addEventListener('click', () => {
		q.$('#send-error').innerText = '';
	});

	// Open resource select dialog when resource-input-button is clicked
	let selectingResources = false;
	q.$('#resource-input-button').addEventListener('click', async () => {
		if (ui.activeGuild === null) return;
		if (ui.activeChannel === null) return;

		if (selectingResources) {
			return;
		}
		selectingResources = true;
		let result = await electronRemote.dialog.showOpenDialog({
			title: 'Select Resource',
			defaultPath: 'D:\\development\\cordis\\client-server\\server\\data', // TODO: not hardcoded
			properties: [ 'openFile' ]
		});
		// TODO: multiple files do consecutive overlays?
		if (!result.canceled) {
			let element = createUploadOverlayFromPath(document, ui.activeGuild, ui.activeChannel, result.filePaths[0]);
			document.body.appendChild(element);
			q.$$$(element, '.text-input').focus();
		}
		selectingResources = false;
	});

	// Open upload resource dialog when an image is pasted
	window.addEventListener('paste', (e) => {
		if (ui.activeGuild === null) return;
		if (ui.activeChannel === null) return;

		let fileTransferItem: DataTransferItem | null = null;
		for (let item of (e as ClipboardEvent).clipboardData?.items ?? []) {
			if (item.kind == 'file') {
				e.preventDefault(); // don't continue the paste
				fileTransferItem = item;
				break;
			}
		}
		if (fileTransferItem) {
			let element = createUploadOverlayFromDataTransferItem(document, ui.activeGuild, ui.activeChannel, fileTransferItem);
			document.body.appendChild(element);
			q.$$$(element, '.text-input').focus();
		}
	});

	// TODO: drag+drop new server files?
	document.addEventListener('dragenter', () => {
		if (ui.activeGuild === null) return;
		if (ui.activeChannel === null) return;

		if (q.$('.overlay .drop-target')) return;
		let element = createUploadDropTarget(document, q, ui.activeGuild, ui.activeChannel);
		if (!element) return;
		document.body.appendChild(element);
	});
}