import { by_character, by_lurid } from '@andyburke/fsdb/organizers';
import { FSDB_COLLECTION } from '@andyburke/fsdb';
import { FSDB_INDEXER_SYMLINKS } from '@andyburke/fsdb/indexers';

/**
 * @typedef {object} TOPIC_PERMISSIONS
 * @property {string[]}	read			a list of user_ids with read permission for the topic
 * @property {string[]} write			a list of user_ids with write permission for the topic
 * @property {string[]} read_events		a list of user_ids with read_events permission for this topic
 * @property {string[]} write_events	a list of user_ids with write_events permission for this topic
 */

/**
 * TOPIC
 *
 * @property {string} id						- lurid (stable)
 * @property {string} name						- channel name (max 64 characters, unique, unstable)
 * @property {string} creator_id				- user id of the topic creator
 * @property {TOPIC_PERMISSIONS} permissions		- permissions setup for the topic
 * @property {string} [icon_url]				- optional url for topic icon
 * @property {string} [topic]					- optional topic for the topic
 * @property {string} [rules]					- optional topic rules (Markdown/text)
 * @property {string[]} [tags]					- optional tags for the topic
 * @property {Record<string,any>} [meta]		- optional metadata about the topic
 * @property {Record<string,string>} [emojis]	- optional emojis table, eg: { 'rofl': 🤣, 'blap': 'https://somewhere.someplace/image.jpg' }
 */

export type TOPIC = {
	id: string;
	name: string;
	creator_id: string;
	permissions: {
		read: string[];
		write: string[];
		read_events: string[];
		write_events: string[];
	};
	icon_url?: string;
	topic?: string;
	rules?: string;
	tags?: string[];
	meta?: Record<string, any>;
	emojis?: Record<string, string>; // either: string: emoji eg: { 'rofl: 🤣, ... } or { 'rofl': 🤣, 'blap': 'https://somewhere.someplace/image.jpg' }
	timestamps: {
		created: string;
		updated: string;
		archived: string | undefined;
	};
};

export const TOPICS = new FSDB_COLLECTION<TOPIC>({
	name: 'topics',
	id_field: 'id',
	organize: by_lurid,
	indexers: {
		creator_id: new FSDB_INDEXER_SYMLINKS<TOPIC>({
			name: 'creator_id',
			field: 'creator_id',
			to_many: true,
			organize: by_lurid
		}),

		name: new FSDB_INDEXER_SYMLINKS<TOPIC>({
			name: 'name',
			get_values_to_index: (topic) => [topic.name.toLowerCase()],
			organize: by_character
		}),

		tags: new FSDB_INDEXER_SYMLINKS<TOPIC>({
			name: 'tags',
			get_values_to_index: (topic): string[] => {
				return (topic.tags ?? []).map((tag) => tag.toLowerCase());
			},
			to_many: true,
			organize: by_character
		}),

		topic: new FSDB_INDEXER_SYMLINKS<TOPIC>({
			name: 'topic',
			get_values_to_index: (topic): string[] => {
				return (topic.topic ?? '').split(/\W/);
			},
			to_many: true,
			organize: by_character
		})
	}
});