namespace _zeitbild.repository.calendar
{
	
	/**
	 */
	var _core_store : (
		null
		|
		lib_plankton.storage.type_core_store<
			_zeitbild.type.calendar_id,
			Record<string, any>,
			{},
			lib_plankton.storage.type_sql_table_autokey_search_term,
			Record<string, any>
		>
	) = null;
	
	
	/**
	 */
	var _event_store : (
		null
		|
		lib_plankton.storage.type_core_store<
			_zeitbild.type.event_id,
			Record<string, any>,
			{},
			lib_plankton.storage.type_sql_table_autokey_search_term,
			Record<string, any>
		>
	) = null;
	
	
	/**
	 */
	function get_core_store(
	) : lib_plankton.storage.type_core_store<
		_zeitbild.type.calendar_id,
		Record<string, any>,
		{},
		lib_plankton.storage.type_sql_table_autokey_search_term,
		Record<string, any>
	>
	{
		if (_core_store === null) {
			_core_store = lib_plankton.storage.sql_table_autokey_core_store(
				{
					"database_implementation": _zeitbild.database.get_implementation(),
					"table_name": "calendars",
					"key_name": "id",
				}
			);
		}
		else {
			// do nothing
		}	
		return _core_store;
	}
	
	
	/**
	 */
	function get_event_store(
	) : lib_plankton.storage.type_core_store<
		_zeitbild.type.event_id,
		Record<string, any>,
		{},
		lib_plankton.storage.type_sql_table_autokey_search_term,
		Record<string, any>
	>
	{
		if (_event_store === null) {
			_event_store = lib_plankton.storage.sql_table_autokey_core_store(
				{
					"database_implementation": _zeitbild.database.get_implementation(),
					"table_name": "events",
					"key_name": "id",
				}
			);
		}
		else {
			// do nothing
		}	
		return _event_store;
	}
	
	
	/**
	 * @todo use events table
	 */
	function encode(
		object : _zeitbild.type.calendar_object
	) : Record<string, any>
	{
		switch (object.kind) {
			/*
			case "concrete": {
				const data_raw : any = lib_plankton.json.encode(object.data);
				data_raw["users"]
				return {
					"name": object.name,
					"private": object.private,
					"kind": object.kind,
					"data": {
						"users": data_raw["users"],
						"events": [] // TODO
					},
				};
			}
			 */
			default: {
				return {
					"name": object.name,
					"private": object.private,
					"kind": object.kind,
					"data": lib_plankton.json.encode(object.data),
				};
			}
		}
	}
	
	
	/**
	 */
	function decode(
		row : Record<string, any>
	) : _zeitbild.type.calendar_object
	{
		return {
			"name": row["name"],
			"private": row["private"],
			"kind": row["kind"],
			"data": lib_plankton.json.decode(row["data"]),
		};
	}
	
	
	/**
	 */
	export async function dump(
	) : Promise<
		Array<
			{
				id : _zeitbild.type.calendar_id;
				object : _zeitbild.type.calendar_object;
			}
		>
	>
	{
		return (
			(await get_core_store().search(null))
			.map(
				({"key": key, "preview": preview}) => ({
					"id": key,
					"object": (preview as _zeitbild.type.calendar_object),
				})
			)
		);
	}
	
	
	/**
	 * @todo optimize
	 */
	export async function list(
		search_term : (null | string)
	) : Promise<
		Array<
			{
				id : _zeitbild.type.calendar_id;
				preview : {
					name : string;
				};
			}
		>
	>
	{
		return (
			(await get_core_store().search(null))
			.filter(
				({"key": key, "preview": preview}) => (
					(
						(search_term === null)
						||
						(search_term.length <= 1)
					)
					? true
					: (
						preview["name"].toLowerCase().includes(search_term.toLowerCase())
					)
				)
			)
			.map(
				({"key": key, "preview": preview}) => ({
					"id": key,
					"preview": {
						"name": preview["name"],
					}
				})
			)
		);
	}
	
	
	/**
	 */
	export async function read(
		id : _zeitbild.type.calendar_id
	) : Promise<_zeitbild.type.calendar_object>
	{
		const row : Record<string, any> = await get_core_store().read(id);
		
		return decode(row);
	}
	
	
	/**
	 */
	export async function create(
		value : _zeitbild.type.calendar_object
	) : Promise<_zeitbild.type.calendar_id>
	{
		const row : Record<string, any> = encode(value);
		const id : _zeitbild.type.calendar_id = await get_core_store().create(row);
		
		return id;
	}
	
	
	/**
	 */
	export async function update(
		id : _zeitbild.type.calendar_id,
		value : _zeitbild.type.calendar_object
	) : Promise<void>
	{
		const row : Record<string, any> = encode(value);
		
		await get_core_store().update(id, row);
	}
	
	
	/**
	 */
	export async function delete_(
		id : _zeitbild.type.calendar_id
	) : Promise<void>
	{
		await get_core_store().delete(id);
	}
	
}