<?php

namespace davina\conf;

require_once(DIR_LOGIC . '/helpers/list.php');


/**
 */
class struct_auth
{
	public string $kind;
	public $data;
}


/**
 */
class struct_source_data_ics_feed
{
	public string $url;
	public bool $combined;
	public int $lifetime;
}


/**
 */
class struct_source
{
	public string $name;
	public string $kind;
	public $data;
}


/**
 */
class struct_settings
{
	public string $timezone;
}


/**
 */
class struct_root
{
	public struct_auth $auth;
	/**
	 * @var array {list<struct_source>}
	 */
	public array $sources;
	public struct_settings $settings;
}


/**
 */
class _state
{
	public static ?struct_root $data = null;
}


/**
 */
function validate_source_name(
	string $source_name
) : string
{
	$matchs = null;
	$result = preg_match('/^[0-9a-zA-Z]+$/', $source_name, $matches);
	return ($result === 1);
}


/**
 */
function load(
	string $path
) : void
{
	$data_raw = \json_decode(
		\file_get_contents(
			$path
		),
		true
	);
	{
		$data = new struct_root();
		// auth
		{
			$auth = new struct_auth();
			$auth->kind = (($data_raw['auth'] ?? [])['kind'] ?? 'none');
			$auth->data = (($data_raw['auth'] ?? [])['data'] ?? null);
			$data->auth = $auth;
		}
		// sources
		{
			$sources = [];
			/**
			 * @todo check for name duplicates
			 */
			$data->sources = \davina\helpers\list_\map(
				$data_raw['sources'],
				function ($source_raw) {
					if (! validate_source_name($source_raw['name']))
					{
						throw (new \Exception(\sprintf('invalid source name: "%s"', $source_raw['name'])));
					}
					else
					{
						$source = new struct_source();
						$source->name = $source_raw['name'];
						$source->kind = $source_raw['kind'];
						$source->data = ($source_raw['data'] ?? null);
						return $source;
					}
				}
			);
		}
		// settings
		{
			$settings = new struct_settings();
			$settings->timezone = (($data_raw['settings'] ?? [])['timezone'] ?? 'UTC');
			$data->settings = $settings;
		}
		_state::$data = $data;
	}
}


/**
 */
function get(
) : struct_root
{
	if (_state::$data === null)
	{
		throw (new \Exception('not yet loaded'));
	}
	else
	{
		return _state::$data;
	}
}

 ?>