/**
 * @copyright Copyright (c) 2023 Lucas Azevedo <lhs_azevedo@hotmail.com>
 *
 * @author Lucas Azevedo <lhs_azevedo@hotmail.com>
 *
 * @license AGPL-3.0-or-later
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 */
import { FileAction, Node, registerDavProperty, registerFileAction } from "@nextcloud/files";
import { translate as t } from '@nextcloud/l10n'

import '../css/fileEntryInlineSystemTags.scss'

const getNodeSystemTags = function (node: Node): string[] {
	const tags = node.attributes?.['system-tags']?.['system-tag'] as string|string[]|undefined

	if (tags === undefined) {
		return []
	}

	return [tags].flat()
}

const renderTag = function (tag: string, isMore: boolean = false): HTMLElement {
	const tagElement = document.createElement('li')
	tagElement.classList.add('files-list__system-tag')
	tagElement.textContent = tag

	if (isMore) {
		tagElement.classList.add('files-list__system-tag--more')
	}

	return tagElement;
}

export const action = new FileAction({
	id: 'system-tags',
	displayName: () => '',
	iconSvgInline: () => '',
	exec: async () => null,

	async renderInline(node: Node) {
		// Ensure we have the system tags as an array
		const tags = getNodeSystemTags(node)

		if (tags.length === 0) {
			return null
		}

		const systemTagsElement = document.createElement('ul')
		systemTagsElement.classList.add('files-list__system-tags')

		if (tags.length === 1) {
			systemTagsElement.setAttribute('aria-label', t('files', 'This file has the tag {tag}', { tag: tags[0] }));
		} else {
			var firstTags = tags.slice(0, -1).join(', ');
			var lastTag = tags[tags.length - 1];
			systemTagsElement.setAttribute('aria-label', t('files', 'This file has the tags {firstTags} and {lastTag}', { firstTags, lastTag }));
		}

		systemTagsElement.append(renderTag(tags[0]))
		
		// More tags than the one we're showing
		if (tags.length > 1) {
			const moreTagElement = renderTag('+' + (tags.length - 1), true)
			moreTagElement.setAttribute('title', tags.slice(1).join(', '));
			systemTagsElement.append(moreTagElement);
		}

		return systemTagsElement
	},

	order: 0
})

registerDavProperty('nc:system-tags')
registerFileAction(action)