/**
 * @copyright Copyright (c) 2023 John Molakvoæ <skjnldsv@protonmail.com>
 *
 * @author John Molakvoæ <skjnldsv@protonmail.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 type { FileSource, PathsStore, PathOptions, ServicesState } from '../types'
import { defineStore } from 'pinia'
import { FileType, Folder, Node, getNavigation } from '@nextcloud/files'
import { subscribe } from '@nextcloud/event-bus'
import Vue from 'vue'
import logger from '../logger'

import { useFilesStore } from './files'

export const usePathsStore = function(...args) {
	const files = useFilesStore(...args)

	const store = defineStore('paths', {
		state: () => ({
			paths: {} as ServicesState,
		} as PathsStore),

		getters: {
			getPath: (state) => {
				return (service: string, path: string): FileSource|undefined => {
					if (!state.paths[service]) {
						return undefined
					}
					return state.paths[service][path]
				}
			},
		},

		actions: {
			addPath(payload: PathOptions) {
				// If it doesn't exists, init the service state
				if (!this.paths[payload.service]) {
					Vue.set(this.paths, payload.service, {})
				}

				// Now we can set the provided path
				Vue.set(this.paths[payload.service], payload.path, payload.source)
			},

			onCreatedNode(node: Node) {
				const service = getNavigation()?.active?.id || 'files'
				if (!node.fileid) {
					logger.error('Node has no fileid', { node })
					return
				}

				// Only add path if it's a folder
				if (node.type === FileType.Folder) {
					this.addPath({
						service,
						path: node.path,
						source: node.source,
					})
				}

				// Update parent folder children if exists
				// If the folder is the root, get it and update it
				if (node.dirname === '/') {
					const root = files.getRoot(service)
					if (!root._children) {
						Vue.set(root, '_children', [])
					}
					root._children.push(node.source)
					return
				}

				// If the folder doesn't exists yet, it will be
				// fetched later and its children updated anyway.
				if (this.paths[service][node.dirname]) {
					const parentSource = this.paths[service][node.dirname]
					const parentFolder = files.getNode(parentSource) as Folder
					logger.debug('Path already exists, updating children', { parentFolder, node })

					if (!parentFolder) {
						logger.error('Parent folder not found', { parentSource })
						return
					}

					if (!parentFolder._children) {
						Vue.set(parentFolder, '_children', [])
					}
					parentFolder._children.push(node.source)
					return
				}

				logger.debug('Parent path does not exists, skipping children update', { node })
			},
		},
	})

	const pathsStore = store(...args)
	// Make sure we only register the listeners once
	if (!pathsStore._initialized) {
		// TODO: watch folders to update paths?
		subscribe('files:node:created', pathsStore.onCreatedNode)
		// subscribe('files:node:deleted', pathsStore.onDeletedNode)
		// subscribe('files:node:moved', pathsStore.onMovedNode)

		pathsStore._initialized = true
	}

	return pathsStore
}