<?php namespace System;

/**
 * Nano
 *
 * Lightweight php framework
 *
 * @package		nano
 * @author		k. wilson
 * @link		http://madebykieron.co.uk
 */

class Config {

	public static $items = array(),  $cache = array(), $mapped = array();

	public static function get($key, $default = null) {
		// return cached
		if(isset(static::$cache[$key])) {
			return static::$cache[$key];
		}

		// load config file
		$file = current(explode('.', $key));

		if( ! array_key_exists($file, static::$mapped)) {
			static::load($file);
		}

		// cache it for faster lookups
		static::$cache[$key] = array_get(static::$items, $key, $default);

		return static::$cache[$key];
	}

	public static function set($key, $value) {
		array_set(static::$items, $key, $value);
	}

	public static function forget($key) {
		array_forget(static::$items, $key);
	}

	public static function path() {
		if(defined('ENV')) {
			$path = APP . 'config' . DS . ENV . DS;

			if(file_exists($path)) {
				return $path;
			}
		}

		return APP . 'config' . DS;
	}

	public static function load($file) {
		if(is_readable($path = static::path() . $file . EXT)) {
			// add file to mapped files
			static::$mapped[] = $file;

			// get returned array
			return static::$items[$file] = require $path;
		}
	}

}