<?php
/**
 * require define(APP_PATH_CONFIG)
 *
 * Config file name format:
 ** po "-" zawsze $host ($_SERVER['SERVER_NAME']), inne "--"
 ** main config file
 * .cnf.ini.php
 * .cnf-{$host}.ini.php
 ** special $config_file
 * .cnf--{$config_file}.ini.php
 * .cnf--{$config_file}-{$host}.ini.php
 **** eg. "external_ids":
 *   .cnf--external_ids.ini.php
 *   .cnf--external_ids-{$host}.ini.php
 **** eg. $config_file = zasob_{$ID}
 *   .cnf--zasob_{$ID}.ini.php - config file for zasob $ZASOB_ID
 *   .cnf--zasob_{$ID}-{$host}.ini.php - config file for zasob $ZASOB_ID on host
 **** eg. $config_file = column_init_{$ID}
 *   .cnf--column_init_{$table}.ini.php - config file for column
 *   .cnf--column_init_{$table}-{$host}.ini.php - config file for column on host
 *
 * TODO: dziedziczenie plikow na podstawie hosta - kropki? dla hosta www2.biall.com.pl i www.biall.com.pl dziedziczy po: biall.com.pl
 *
 * If conf file not found '.cnf*.ini.php' then try to find file '.cnf*.inc.php'
 *
 * Struktura pliku .cnf*.ini.php
;<?php
;die(); // For further security
;// @COMMENT

foo="bar"
[section1]
foo1="bar1"
 * parse_ini_file( file, true ) # true - process_sections
Array
(
    [foo] => bar
    [section1] => Array
        (
            [foo1] => bar1
        )
)
 *
 * Struktura pliku .cnf*.inc.php
<?php
return function ($secret = '') {
	if ('secret-p5-password' !== $secret) return null;
	$conf = [
		'host' => "",
		// ...
	];
	return $conf;
};
 */

class Config {

	public static function get($key, $section = null) {
		static $_main_config;

		if ($_main_config === null) {
			$_main_config = self::getConfFile();
		}

		if ($key == 'get-all-data') {
			return $_main_config;
		}

		$cur_conf = $_main_config;
		if ($section !== null) {
			$cur_conf = V::get($section, null, $_main_config);
		}
		return V::get($key, null, $cur_conf);
	}

	public static function getData() {
		return self::get('get-all-data');
	}

	/**
	 * Search for zasob config ini file.
	 * Config file name must contain zasob_{$ID} for example:
	 *   .cnf--zasob_{$ID}.ini.php - config file for zasob $ZASOB_ID
	 *   .cnf--zasob_{$ID}-{$host}.ini.php - config file for zasob $ZASOB_ID on host
	 */
	public static function getZasobConf($zasob_id) {
		return self::getConfFile("zasob_{$zasob_id}");
	}

	/**
	 * Search for zasob config ini file.
	 */
	public static function getColumnConf($col) {
		return self::getConfFile("column_init_{$col}");
	}

	/**
	 * Search for config ini file.
	 * TODO: $conf_file == '' - main config file
	 */
	public static function getConfFile($conf_file = '') {
		static $_cnf;
		if (!is_array($_cnf)) $_cnf = array();

		if (array_key_exists($conf_file, $_cnf)) {
			return $_cnf[$conf_file];
		}
		$_cnf[$conf_file] = null;

		$cnf = null;
		$file_prefix = '.cnf';
		if ($conf_file != '') $file_prefix .= '--'.$conf_file;
		$file_suffix = '.ini.php';
		$search_for_files = array();// kolejka includowania plikow
		$host = $_SERVER['SERVER_NAME'];
		$search_for_files[] = APP_PATH_CONFIG . DS . $file_prefix . '-' . $host . $file_suffix;

		// dziedziczenie - subdomain np. www.biall.com.pl i www2.biall.com.pl -> biall.com.pl
		$host_subdomain_exp = explode('.', $host);
		$host_subdomain = reset($host_subdomain_exp);
		$host_parent = substr($host, strlen($host_subdomain . '.'));
		$search_for_files[] = APP_PATH_CONFIG . DS . $file_prefix . '-' . $host_parent . $file_suffix;

		$search_for_files[] = APP_PATH_CONFIG . DS . $file_prefix . $file_suffix;
		foreach ($search_for_files as $f) {
			if (1 == V::get('DBG_CNF', '', $_GET)) { echo "f(" . end(explode('/',$f)) . ")=(" . file_exists($f) . ")"; }
			if (file_exists($f)) {
				Lib::loadClass('Core_Config_INI');
				$cnf = new Core_Config_INI($f);
				$_cnf[$conf_file] = $cnf->getData();
				break;
			}
		}

		try {
			if (empty($_cnf[$conf_file])) {
				$file_suffix = '.inc.php';
				$search_for_files[] = APP_PATH_CONFIG . DS . $file_prefix . '-' . $host . $file_suffix;
				$search_for_files[] = APP_PATH_CONFIG . DS . $file_prefix . '-' . $host_parent . $file_suffix;
				$search_for_files[] = APP_PATH_CONFIG . DS . $file_prefix . $file_suffix;
				foreach ($search_for_files as $f) {
					if (1 == V::get('DBG_CNF', '', $_GET)) { echo "f(" . end(explode('/',$f)) . ")=(" . file_exists($f) . ")"; }
					if (file_exists($f)) {
						$fun = include $f;
						if (!is_callable($fun)) throw new Exception("Config func is not callable");
						$_cnf[$conf_file] = $fun('secret-p5-password');
						break;
					}
				}
			}
		} catch (Exception $e) {
			DBG::log($e);
		}

		return $_cnf[$conf_file];
	}

	/**
	 * activeProject - SE/projects/{activeProject}/
	 * may be set by ENV or in CRM_CONFIG
	 */
	public static function getProjectName() {
		static $_activeProject = null;
		if (null !== $_activeProject) return $_activeProject;

		$activeProject = V::get('P5_ACTIVE_PROJECT', '', $_SERVER);
		DBG::log("\$activeProject = '{$activeProject}' (ENV)");
		if ($activeProject) {
			$path = APP_PATH_ROOT . DS . "projects" . DS . "{$activeProject}";
			if (!file_exists($path)) throw new Exception("Missing project folder '{$activeProject}' (env)");
		}

		if (!$activeProject) {
			$activeProject = DB::getPDO()->fetchValue(" select c.CONF_VAL from CRM_CONFIG c where c.CONF_KEY = 'activeProject' ");
			if ($activeProject) {
				$path = APP_PATH_ROOT . DS . "projects" . DS . "{$activeProject}";
				if (!file_exists($path)) throw new Exception("Missing project folder '{$activeProject}' (db)");
			}
		}
		DBG::log("\$activeProject = '{$activeProject}' (ENV, DB)");
		$_activeProject = (string)$activeProject;

		return $_activeProject;
	}

	public static function getProjectPath() {
		$activeProject = self::getProjectName();
		if (!$activeProject) return null;
		return APP_PATH_ROOT . DS . "projects" . DS . "{$activeProject}";
	}

}