namespace _zeitbild.api
{
	
	/**
	 */
	export function register_caldav_probe(
		rest_subject : lib_plankton.rest_caldav.type_rest
	) : void
	{
		register<
			null,
			string
		>(
			rest_subject,
			lib_plankton.caldav.enum_method.propfind,
			"/caldav",
			{
				"query_parameters": () => ([
					{
						"name": "from",
						"required": false,
						"description": "UNIX timestamp",
					},
					{
						"name": "to",
						"required": false,
						"description": "UNIX timestamp",
					},
					{
						"name": "calendar_ids",
						"required": false,
						"description": "comma separated",
					},
					{
						"name": "auth",
						"required": true,
						"description": "",
					},
				]),
				"output_schema": () => ({
					"nullable": false,
					"type": "string",
				}),
				"response_body_mimetype": "text/xml; charset=utf-8",
				"response_body_encode": output => Buffer.from(output),
				// "restriction": restriction_basic_auth,
				"restriction": restriction_none,
				/**
				 * @todo examine body
				 */
				"execution": async (stuff) => {
					const user_id : (null | type_user_id) = await _zeitbild.api.web_auth(
						stuff.headers["Authorization"]
						??
						stuff.headers["authorization"]
						??
						null
					);
					if (user_id === null) {
						return Promise.resolve(
							{
								"status_code": 401,
								"data": "",
								"extra_headers": {
									"WWW-Authenticate": "Basic realm=Restricted",
								}
							}
						);
					}
					else {
						return (
							_zeitbild.service.calendar.overview(user_id)
							.then(
								(data_raw) => Promise.resolve(
									data_raw
									.map(
										(entry) => ({
											"id": entry.id,
											"name": entry.name,
											"access_level": _zeitbild.value_object.access_level.to_string(entry.access_level),
										})
									)
								)
							)
							.then(
								(data) => Promise.resolve({
									"status_code": 207,
									"data": (
										"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
										+
										lib_plankton.webdav.data_multistatus_encode(
											{
												"responses": [
													{
														"href": "/caldav/events",
														"body": {
															"propstats": data.map(
																(entry) => ({
																	"prop": [
																		{"name": "displayname", "value": entry.name},
																		// {"name": "cs:getctag", "value": "47"}, // TODO correct value
																		// {"name": "current-user-privilege-set", "value": ""},
																	],
																	"status": "HTTP/2.0 200 OK",
																	"description": entry.access_level,
																})
															),
														},
														"description": null,
													}
												],
												"description": null,
											}
										)
									),
								})
							)
						);
					}
				}
			}
		);
	}
	
}