<?php

namespace Configula\Loader;

use Configula\ConfigLoaderInterface;
use Configula\ConfigValues;
use InvalidArgumentException;
use SplFileInfo;

/**
 * Class CascadingLoader
 *
 * @package FandF\Config
 */
class CascadingConfigLoader implements ConfigLoaderInterface
{
	/** @var iterable|ConfigLoaderInterface[] */
	private $loaders;


	/**
	 * Pass in an iterable list of multiple loaders, file names, or arrays of values
	 *
	 * @param  iterable|array[]|string[]|SplFileInfo[]|ConfigLoaderInterface[] $items
	 * @return CascadingConfigLoader
	 */
	public static function build(iterable $items): CascadingConfigLoader
	{
		foreach ($items as $item) {
		    switch (true) {
		        case $item instanceof ConfigLoaderInterface:
		            $loaders[] = $item;
		            break;
		        case is_array($item):
		            $loaders[] = new ArrayValuesLoader($item);
		            break;
		        case is_string($item) && file_exists($item):
		            $loaders[] = new FileLoader($item);
		            break;
		        case $item instanceof SplFileInfo:
		            $loaders[] = ($item->isDir()) ? new FolderLoader($item) : new FileLoader((string) $item);
		            break;
		        default:
		            throw new InvalidArgumentException(sprintf(
		                'Invalid config source (allowed: array, string (filepath), \SplFileInfo, or config loader): %s',
		                gettype($item)
		            ));
		    }
		}

		return new static($loaders ?? []);
	}


	/**
	 * CascadingLoader constructor.
	 *
	 * @param iterable|ConfigLoaderInterface[] $loaders Loaders, in the order that you want to load them
	 */
	final public function __construct(iterable $loaders)
	{
		$this->loaders = $loaders;
	}


	/**
	 * Load config
	 *
	 * @return ConfigValues
	 */
	public function load(): ConfigValues
	{
		$config = new ConfigValues([]);

		foreach ($this->loaders as $loader) {
		    $config = $config->merge($loader->load());
		}

		return $config;
	}
}
__halt_compiler();----SIGNATURE:----S5VYX0hcDFRCjL71I4zfq4nCCc5pc70o1zn/tc4wCaZX0ewJTxj9igVsJ7TQOjs8070yjC6qKRkZShibP8pQyRq/Y9Svhs+/M5RuhEoTVrCnSeLTucv1D8JSiFjet2as85RBTSUh/ErLa4/SPAWq+RhuQsMe38QhAKSucZ/ds9jlPvmcb3WiaqmrR+VIYFa90a8y0fIC14YwAOK65lZwiZ+DBAjJhZVQI+lbCU3HwjInoMMGa+BzDSw87ACoq0WAqlzVrvLUum0ggDUzAcXWlXRKljWntgnVOR9KJrGkW4lyoeHLM6iJF4xG5FZ6rGwoGfIr9oQ0JquF3R8/Uppnkwoe/Egr4rZEKEGIM7bbtBJh+tb5lF4vT9IiKg5O26m3mQ5/sOA0Ide6Qa4WDG1hZ7y8g4QUZJE1TULbZBehLjhSW5WTtHJLQ2CcRtOYpiQczvZdRYMAZ9F3g5V9T7DwL2WRwj1SC32toBMThJmvUP1qi7wkh9XToZR3gN1D4r2T8p0czA7ncSlhHJpKUK0MIL6kq7Smmkc/Pv4Ue49NhegZ0F8BVETtQhY6g0TEsW1aRyBRFNrZpF9ZqvSoAyAfewBI1hoEOMrs0fDrOhfepMccgIQPZrLqN07gK2YEa+8/nF/oldJffU2swtPim2u2s+br1NyFDNzvaVLUaUpg4Bk=----ATTACHMENT:----OTY4MjUyMzgzNzczMTM3NSA2MzEwNTE2ODAyNjY5MzA3IDYyMzQxMjkxNzI2OTYzMzc=