class Restorer

final class Restorer {
    public function restoreGlobalVariables(Snapshot $snapshot) : void {
        $superGlobalArrays = $snapshot->superGlobalArrays();
        foreach ($superGlobalArrays as $superGlobalArray) {
            $this->restoreSuperGlobalArray($snapshot, $superGlobalArray);
        }
        $globalVariables = $snapshot->globalVariables();
        foreach (array_keys($GLOBALS) as $key) {
            if ($key !== 'GLOBALS' && !in_array($key, $superGlobalArrays, true) && !$snapshot->excludeList()
                ->isGlobalVariableExcluded($key)) {
                if (array_key_exists($key, $globalVariables)) {
                    $GLOBALS[$key] = $globalVariables[$key];
                }
                else {
                    unset($GLOBALS[$key]);
                }
            }
        }
    }
    public function restoreStaticProperties(Snapshot $snapshot) : void {
        $current = new Snapshot($snapshot->excludeList(), false, false, false, false, true, false, false, false, false);
        $newClasses = array_diff($current->classes(), $snapshot->classes());
        unset($current);
        foreach ($snapshot->staticProperties() as $className => $staticProperties) {
            foreach ($staticProperties as $name => $value) {
                $reflector = new ReflectionProperty($className, $name);
                $reflector->setValue(null, $value);
            }
        }
        foreach ($newClasses as $className) {
            $class = new ReflectionClass($className);
            $defaults = $class->getDefaultProperties();
            foreach ($class->getProperties() as $property) {
                if (!$property->isStatic()) {
                    continue;
                }
                $name = $property->getName();
                if ($snapshot->excludeList()
                    ->isStaticPropertyExcluded($className, $name)) {
                    continue;
                }
                if (!isset($defaults[$name])) {
                    continue;
                }
                $property->setValue(null, $defaults[$name]);
            }
        }
    }
    private function restoreSuperGlobalArray(Snapshot $snapshot, string $superGlobalArray) : void {
        $superGlobalVariables = $snapshot->superGlobalVariables();
        if (isset($GLOBALS[$superGlobalArray], $superGlobalVariables[$superGlobalArray]) && is_array($GLOBALS[$superGlobalArray])) {
            $keys = array_keys(array_merge($GLOBALS[$superGlobalArray], $superGlobalVariables[$superGlobalArray]));
            foreach ($keys as $key) {
                if (isset($superGlobalVariables[$superGlobalArray][$key])) {
                    $GLOBALS[$superGlobalArray][$key] = $superGlobalVariables[$superGlobalArray][$key];
                }
                else {
                    unset($GLOBALS[$superGlobalArray][$key]);
                }
            }
        }
    }

}