<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\apidoc\models;

use phpDocumentor\Reflection\FileReflector;
use yii\base\Component;
use yii\base\Exception;

/**
 *
 * @author Carsten Brandt <mail@cebe.cc>
 * @since 2.0
 */
class Context extends Component
{
	/**
	 * @var array list of php files that have been added to this context.
	 */
	public $files = [];
	/**
	 * @var ClassDoc[]
	 */
	public $classes = [];
	/**
	 * @var InterfaceDoc[]
	 */
	public $interfaces = [];
	/**
	 * @var TraitDoc[]
	 */
	public $traits = [];


	public function getType($type)
	{
		$type = ltrim($type, '\\');
		if (isset($this->classes[$type])) {
			return $this->classes[$type];
		} elseif (isset($this->interfaces[$type])) {
			return $this->interfaces[$type];
		} elseif (isset($this->traits[$type])) {
			return $this->traits[$type];
		}
		return null;
	}

	public function addFile($fileName)
	{
		$this->files[$fileName] = sha1_file($fileName);

		$reflection = new FileReflector($fileName, true);
		$reflection->process();

		foreach($reflection->getClasses() as $class) {
			$class = new ClassDoc($class);
			$class->sourceFile = $fileName;
			$this->classes[$class->name] = $class;
		}
		foreach($reflection->getInterfaces() as $interface) {
			$interface = new InterfaceDoc($interface);
			$interface->sourceFile = $fileName;
			$this->interfaces[$interface->name] = $interface;
		}
		foreach($reflection->getTraits() as $trait) {
			$trait = new TraitDoc($trait);
			$trait->sourceFile = $fileName;
			$this->traits[$trait->name] = $trait;
		}
	}

	public function updateReferences()
	{
		// update all subclass references
		foreach($this->classes as $class) {
			$className = $class->name;
			while (isset($this->classes[$class->parentClass])) {
				$class = $this->classes[$class->parentClass];
				$class->subclasses[] = $className;
			}
		}
		// update interfaces of subclasses
		foreach($this->classes as $class) {
			$this->updateSubclassInferfacesTraits($class);
		}
		// update implementedBy and usedBy for interfaces and traits
		foreach($this->classes as $class) {
			foreach($class->interfaces as $interface) {
				if (isset($this->interfaces[$interface])) {
					$this->interfaces[$interface]->implementedBy[] = $class->name;
				}
			}
			foreach($class->traits as $trait) {
				if (isset($this->traits[$trait])) {
					$trait = $this->traits[$trait];
					$trait->usedBy[] = $class->name;
					$class->properties = array_merge($trait->properties, $class->properties);
					$class->methods = array_merge($trait->methods, $class->methods);
				}
			}
		}
		// update properties, methods, contants and events of subclasses
		foreach($this->classes as $class) {
			$this->updateSubclassInheritance($class);
		}
	}

	/**
	 * Add implemented interfaces and used traits to subclasses
	 * @param ClassDoc $class
	 */
	protected function updateSubclassInferfacesTraits($class)
	{
		foreach($class->subclasses as $subclass) {
			$subclass = $this->classes[$subclass];
			$subclass->interfaces = array_unique(array_merge($subclass->interfaces, $class->interfaces));
			$subclass->traits = array_unique(array_merge($subclass->traits, $class->traits));
			$this->updateSubclassInferfacesTraits($subclass);
		}
	}

	/**
	 * Add implemented interfaces and used traits to subclasses
	 * @param ClassDoc $class
	 */
	protected function updateSubclassInheritance($class)
	{
		foreach($class->subclasses as $subclass) {
			$subclass = $this->classes[$subclass];
			$subclass->events = array_merge($class->events, $subclass->events);
			$subclass->constants = array_merge($class->constants, $subclass->constants);
			$subclass->properties = array_merge($class->properties, $subclass->properties);
			$subclass->methods = array_merge($class->methods, $subclass->methods);
			$this->updateSubclassInheritance($subclass);
		}
	}
}