<?php

declare(strict_types=1);

namespace Kiri\Di;

class ChangeSet
{

	/**
	 * @var array
	 */
	private array $changedFiles = [];


	/**
	 * @var array
	 */
	private array $removedFiles = [];


	/**
	 * @var array
	 */
	private array $changedClasses = [];


	/**
	 * @var array
	 */
	private array $removedClasses = [];


	/**
	 * @param string $file
	 * @return void
	 */
	public function addChangedFile(string $file): void
	{
		$this->changedFiles[$file] = true;
	}


	/**
	 * @param string $file
	 * @return void
	 */
	public function addRemovedFile(string $file): void
	{
		$this->removedFiles[$file] = true;
	}


	/**
	 * @param string $class
	 * @return void
	 */
	public function addChangedClass(string $class): void
	{
		$this->changedClasses[$class] = true;
	}


	/**
	 * @param string $class
	 * @return void
	 */
	public function addRemovedClass(string $class): void
	{
		$this->removedClasses[$class] = true;
	}


	/**
	 * @param ChangeSet $changeSet
	 * @return $this
	 */
	public function merge(ChangeSet $changeSet): self
	{
		foreach ($changeSet->getChangedFiles() as $file) {
			$this->addChangedFile($file);
		}

		foreach ($changeSet->getRemovedFiles() as $file) {
			$this->addRemovedFile($file);
		}

		foreach ($changeSet->getChangedClasses() as $class) {
			$this->addChangedClass($class);
		}

		foreach ($changeSet->getRemovedClasses() as $class) {
			$this->addRemovedClass($class);
		}

		return $this;
	}


	/**
	 * @return array
	 */
	public function getChangedFiles(): array
	{
		return array_keys($this->changedFiles);
	}


	/**
	 * @return array
	 */
	public function getRemovedFiles(): array
	{
		return array_keys($this->removedFiles);
	}


	/**
	 * @return array
	 */
	public function getChangedClasses(): array
	{
		return array_keys($this->changedClasses);
	}


	/**
	 * @return array
	 */
	public function getRemovedClasses(): array
	{
		return array_keys($this->removedClasses);
	}


	/**
	 * @return bool
	 */
	public function hasChanges(): bool
	{
		return $this->changedFiles !== [] || $this->removedFiles !== [] || $this->changedClasses !== [] || $this->removedClasses !== [];
	}


	/**
	 * @return array
	 */
	public function toArray(): array
	{
		return [
			'changed_files'   => $this->getChangedFiles(),
			'removed_files'   => $this->getRemovedFiles(),
			'changed_classes' => $this->getChangedClasses(),
			'removed_classes' => $this->getRemovedClasses(),
		];
	}
}