<?php

namespace ByJG\AnyDataset\Core;

use ByJG\Serializer\SerializerObject;

class Row
{
	/** @var array */
	private $row = [];

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

	/** @var boolean */
	protected $fieldNameCaseSensitive = true;


	/**
	 * Row constructor
	 *
	 * @param Row|array|\stdClass|object $instance
	 * @throws \ByJG\Serializer\Exception\InvalidArgumentException
	 */
	public function __construct($instance = [])
	{
		if (is_array($instance)) {
		    $this->row = $instance;
		} else {
		    $this->row = SerializerObject::instance($instance)->serialize();
		}

		$this->acceptChanges();
	}


	/**
	 * Add a string field to row
	 * @param string $name
	 * @param string|array|null $value
	 * @return void
	 */
	public function addField($name, $value)
	{
		$name = $this->getHydratedFieldName($name);

		if (!array_key_exists($name, $this->row)) {
		    $this->row[$name] = $value;
		} elseif (is_array($this->row[$name])) {
		    $this->row[$name][] = $value;
		} else {
		    $this->row[$name] = array($this->row[$name], $value);
		}
	}


	/**
	 * @param string $name - Field name
	 * @return null|string
	 * @desc et the string value from a field name
	 */
	public function get($name)
	{
		$name = $this->getHydratedFieldName($name);

		if (!array_key_exists($name, $this->row)) {
		    return null;
		}

		$result = $this->row[$name];
		if (is_array($result)) {
		    return array_shift($result);
		} else {
		    return $result;
		}
	}


	/**
	 * Get array from a single field
	 *
	 * @param string $fieldName
	 * @return array
	 */
	public function getAsArray($fieldName)
	{
		$fieldName = $this->getHydratedFieldName($fieldName);

		if (!array_key_exists($fieldName, $this->row)) {
		    return [];
		}

		$result = $this->row[$fieldName];

		if (empty($result)) {
		    return [];
		}

		return (array)$result;
	}


	/**
	 * Return all Field Names from current Row
	 * @return array
	 */
	public function getFieldNames()
	{
		return array_keys($this->row);
	}


	/**
	 * Set a string value to existing field name
	 * @param string $name
	 * @param string $value
	 * @return void
	 */
	public function set($name, $value)
	{
		$name = $this->getHydratedFieldName($name);

		if (!array_key_exists($name, $this->row)) {
		    $this->addField($name, $value);
		} else {
		    $this->row[$name] = $value;
		}
	}


	/**
	 * Remove specified field name from row.
	 *
	 * @param string $fieldName
	 * @return null
	 */
	public function removeField($fieldName)
	{
		$fieldName = $this->getHydratedFieldName($fieldName);

		if (array_key_exists($fieldName, $this->row)) {
		    unset($this->row[$fieldName]);
		}
	}


	/**
	 * Remove specified field name with specified value name from row.
	 *
	 * @param string $fieldName
	 * @param mixed $value
	 * @return void
	 */
	public function removeValue($fieldName, $value)
	{
		$fieldName = $this->getHydratedFieldName($fieldName);

		$result = $this->row[$fieldName];
		if (!is_array($result)) {
		    if ($value == $result) {
		        unset($this->row[$fieldName]);
		    }
		} else {
		    $qty = count($result);
		    for ($i = 0; $i < $qty; $i++) {
		        if ($result[$i] == $value) {
		            unset($result[$i]);
		        }
		    }
		    $this->row[$fieldName] = array_values($result);
		}
	}


	/**
	 * Update a specific field and specific value with new value
	 *
	 * @param String $fieldName
	 * @param String $oldvalue
	 * @param String $newvalue
	 * @return void
	 */
	public function replaceValue($fieldName, $oldvalue, $newvalue)
	{
		$fieldName = $this->getHydratedFieldName($fieldName);

		$result = $this->row[$fieldName];
		if (!is_array($result)) {
		    if ($oldvalue == $result) {
		        $this->row[$fieldName] = $newvalue;
		    }
		} else {
		    for ($i = count($result) - 1; $i >= 0; $i--) {
		        if ($result[$i] == $oldvalue) {
		            $this->row[$fieldName][$i] = $newvalue;
		        }
		    }
		}
	}


	/**
	 * @param array|null $fields
	 * @return array
	 */
	public function toArray($fields = [])
	{
		if (empty($fields)) {
		    return $this->row;
		}

		$fieldAssoc = array_combine($fields, array_fill(0, count($fields), null));
		return array_intersect_key(array_merge($fieldAssoc, $this->row), $fieldAssoc);
	}


	/**
	 * @return array
	 */
	public function getAsRaw()
	{
		return $this->originalRow;
	}


	/**
	 * @return bool
	 */
	public function hasChanges()
	{
		return ($this->row != $this->originalRow);
	}


	/**
	 * @return void
	 */
	public function acceptChanges()
	{
		$this->originalRow = $this->row;
	}


	/**
	 * @return void
	 */
	public function rejectChanges()
	{
		$this->row = $this->originalRow;
	}


	/**
	 * Override Specific implementation of setPropValue to Row
	 *
	 * @param Row $obj
	 * @param string $propName
	 * @param string $value
	 * @return void
	 */
	protected function setPropValue($obj, $propName, $value)
	{
		$obj->set($propName, $value);
	}


	/**
	 * @param string $name
	 * @return bool
	 */
	public function fieldExists($name)
	{
		return isset($this->row[$this->getHydratedFieldName($name)]);
	}


	/**
	 * @return void
	 */
	public function enableFieldNameCaseInSensitive()
	{
		$this->row = array_change_key_case($this->row, CASE_LOWER);
		$this->originalRow = array_change_key_case($this->originalRow, CASE_LOWER);
		$this->fieldNameCaseSensitive = false;
	}


	/**
	 * @return bool
	 */
	public function isFieldNameCaseSensitive()
	{
		return $this->fieldNameCaseSensitive;
	}


	/**
	 * @param string $name
	 * @return string
	 */
	protected function getHydratedFieldName($name)
	{
		if (!$this->isFieldNameCaseSensitive()) {
		    return strtolower($name);
		}

		return $name;
	}
}
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