<?php

namespace Composer\Package\Comparer;

use Composer\Util\Platform;

/**
 * class Comparer
 *
 * @author Hector Prats <hectorpratsortega@gmail.com>
 */
class Comparer
{
	/** @var string Source directory */
	private $source;

	/** @var string Target directory */
	private $update;

	/** @var array{changed?: string[], removed?: string[], added?: string[]} */
	private $changed;


	public function setSource(string $source): void
	{
		$this->source = $source;
	}


	public function setUpdate(string $update): void
	{
		$this->update = $update;
	}


	/**
	 * @return array{changed?: string[], removed?: string[], added?: string[]}|false false if no change
	 */
	public function getChanged(bool $explicated = false)
	{
		$changed = $this->changed;
		if (!count($changed)) {
		    return false;
		}
		if ($explicated) {
		    foreach ($changed as $sectionKey => $itemSection) {
		        foreach ($itemSection as $itemKey => $item) {
		            $changed[$sectionKey][$itemKey] = $item.' ('.$sectionKey.')';
		        }
		    }
		}

		return $changed;
	}


	/**
	 * @return string empty string if no changes
	 */
	public function getChangedAsString(bool $toString = false, bool $explicated = false): string
	{
		$changed = $this->getChanged($explicated);
		if (false === $changed) {
		    return '';
		}

		$strings = [];
		foreach ($changed as $sectionKey => $itemSection) {
		    foreach ($itemSection as $itemKey => $item) {
		        $strings[] = $item."\r\n";
		    }
		}

		return trim(implode("\r\n", $strings));
	}


	public function doCompare(): void
	{
		$source = [];
		$destination = [];
		$this->changed = [];
		$currentDirectory = Platform::getCwd();
		chdir($this->source);
		$source = $this->doTree('.', $source);
		if (!is_array($source)) {
		    return;
		}
		chdir($currentDirectory);
		chdir($this->update);
		$destination = $this->doTree('.', $destination);
		if (!is_array($destination)) {
		    exit;
		}
		chdir($currentDirectory);
		foreach ($source as $dir => $value) {
		    foreach ($value as $file => $hash) {
		        if (isset($destination[$dir][$file])) {
		            if ($hash !== $destination[$dir][$file]) {
		                $this->changed['changed'][] = $dir.'/'.$file;
		            }
		        } else {
		            $this->changed['removed'][] = $dir.'/'.$file;
		        }
		    }
		}
		foreach ($destination as $dir => $value) {
		    foreach ($value as $file => $hash) {
		        if (!isset($source[$dir][$file])) {
		            $this->changed['added'][] = $dir.'/'.$file;
		        }
		    }
		}
	}


	/**
	 * @param mixed[] $array
	 *
	 * @return array<string, array<string, string|false>>|false
	 */
	private function doTree(string $dir, array &$array)
	{
		if ($dh = opendir($dir)) {
		    while ($file = readdir($dh)) {
		        if ($file !== '.' && $file !== '..') {
		            if (is_link($dir.'/'.$file)) {
		                $array[$dir][$file] = readlink($dir.'/'.$file);
		            } elseif (is_dir($dir.'/'.$file)) {
		                if (!count($array)) {
		                    $array[0] = 'Temp';
		                }
		                if (!$this->doTree($dir.'/'.$file, $array)) {
		                    return false;
		                }
		            } elseif (is_file($dir.'/'.$file) && filesize($dir.'/'.$file)) {
		                $array[$dir][$file] = md5_file($dir.'/'.$file);
		            }
		        }
		    }
		    if (count($array) > 1 && isset($array['0'])) {
		        unset($array['0']);
		    }

		    return $array;
		}

		return false;
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NzYzNzQ4NDA0OTAxODY5NCA3NDQ4NjE4MTA1NzkzMzYyIDc1ODYyMzExNzM3MjA2NjA=