<?php
/*
* This file is part of PHP Copy/Paste Detector (PHPCPD).
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace SebastianBergmann\PHPCPD;

class CodeCloneMap implements \Countable, \Iterator
{
/**
* @var CodeClone[] The clones in the clone map
*/
private $clones = [];

/**
* @var CodeClone[] The clones in the clone map, stored by ID
*/
private $clonesById = [];

/**
* @var int Current position while iterating the clone map
*/
private $position = 0;

/**
* @var int Number of duplicate lines in the clone map
*/
private $numberOfDuplicatedLines = 0;

/**
* @var int Number of lines analyzed
*/
private $numLines = 0;

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

/**
* Adds a clone to the map.
*
* @param CodeClone $clone
*/
public function addClone(CodeClone $clone)
{
$id = $clone->getId();

if (!isset($this->clonesById[$id])) {
$this->clones[] = $clone;
$this->clonesById[$id] = $clone;
} else {
$existClone = $this->clonesById[$id];

foreach ($clone->getFiles() as $file) {
$existClone->addFile($file);
}
}

$this->numberOfDuplicatedLines += $clone->getSize() * (\count($clone->getFiles()) - 1);

foreach ($clone->getFiles() as $file) {
if (!isset($this->filesWithClones[$file->getName()])) {
$this->filesWithClones[$file->getName()] = true;
}
}
}

/**
* Returns the clones stored in this map.
*
* @return CodeClone[]
*/
public function getClones()
{
return $this->clones;
}

/**
* Returns the percentage of duplicated code lines in the project.
*
* @return string
*/
public function getPercentage()
{
if ($this->numLines > 0) {
$percent = ($this->numberOfDuplicatedLines / $this->numLines) * 100;
} else {
$percent = 100;
}

return \sprintf('%01.2F%%', $percent);
}

/**
* Returns the number of lines analyzed.
*
* @return int
*/
public function getNumLines()
{
return $this->numLines;
}

/**
* Sets the number of physical source code lines in the project.
*
* @param int $numLines
*/
public function setNumLines($numLines)
{
$this->numLines = $numLines;
}

/**
* Returns the number of clones stored in this map.
*/
public function count()
{
return \count($this->clones);
}

/**
* @return int
*/
public function getNumberOfFilesWithClones()
{
return \count($this->filesWithClones);
}

/**
* @return int
*/
public function getNumberOfDuplicatedLines()
{
return $this->numberOfDuplicatedLines;
}

/**
* Rewinds the Iterator to the first element.
*/
public function rewind()
{
$this->position = 0;
}

/**
* Checks if there is a current element after calls to rewind() or next().
*
* @return bool
*/
public function valid()
{
return $this->position < \count($this->clones);
}

/**
* Returns the key of the current element.
*
* @return int
*/
public function key()
{
return $this->position;
}

/**
* Returns the current element.
*
* @return CodeClone
*/
public function current()
{
return $this->clones[$this->position];
}

/**
* Moves forward to next element.
*/
public function next()
{
$this->position++;
}
}