<?php

namespace Yandex\Market\Ui\UserField\Helper;

use Yandex\Market;

class Attributes
{
	protected static $supportMultiple = [
		'class' => ' ',
		'data-plugin' => ', ',
	];

	public static function convertNameToId($name)
	{
		$result = str_replace(['[', ']', '-', '__'], '_', $name);
		$result = trim($result, '_');

		return $result;
	}

	public static function extractFromSettings($userFieldSettings, $settingNames = null)
	{
		$result = isset($userFieldSettings['ATTRIBUTES']) ? (array)$userFieldSettings['ATTRIBUTES'] : [];

		if ($settingNames === null)
		{
			$settingNames = [
				'READONLY',
				'STYLE',
				'PLACEHOLDER',
			];
		}

		foreach ($settingNames as $settingName)
		{
			if (
				isset($userFieldSettings[$settingName])
				&& $userFieldSettings[$settingName] !== ''
				&& $userFieldSettings[$settingName] !== false
			)
			{
				$setting = $userFieldSettings[$settingName];
				$attributeName = Market\Data\TextString::toLower($settingName);

				$result[$attributeName] = $setting;
			}
		}

		return $result;
	}

	public static function parse($attributesString)
	{
		$hasMatches = preg_match_all('/(?<name>[\w-]+)(?:\s*=\s*["\'](?<value>.*?)["\'])?/', $attributesString, $matches);

		if (!$hasMatches) { return []; }

		$result = [];

		foreach ($matches['name'] as $index => $name)
		{
			$result[$name] = isset($matches['value'][$index])
				? htmlspecialcharsback($matches['value'][$index])
				: true;
		}

		return $result;
	}

	public static function merge($first, ...$other)
	{
		$result = $first;

		foreach ($other as $attributes)
		{
			foreach ($attributes as $name => $value)
			{
				if (!isset($result[$name]))
				{
					$result[$name] = $value;
				}
				else if (isset(static::$supportMultiple[$name]))
				{
					$result[$name] .=
						static::$supportMultiple[$name]
						. $value;
				}
				else
				{
					$result[$name] = $value;
				}
			}
		}

		return $result;
	}

	public static function insert($html, $attributes, \Closure $filter = null, array $tags = [ 'input', 'textarea', 'select' ])
	{
		if (!empty($attributes))
		{
			$result = preg_replace_callback('/(<)(' . implode('|', $tags) . ')(.*?)(\/?>)/si', static function($matches) use ($attributes, $filter) {
				list(, $opener, $tagName, $existsAttributesString, $closer) = $matches;

				$existsAttributes = Attributes::parse($existsAttributesString);

				if ($filter !== null && !$filter($tagName, $existsAttributes)) { return $matches[0]; }
				if (isset($existsAttributes['type']) && $existsAttributes['type'] === 'button') { return $matches[0]; }

				$mergedAttributes = Attributes::merge($existsAttributes, $attributes);

				return $opener . $tagName . ' ' . Attributes::stringify($mergedAttributes) . $closer;
			}, $html);
		}
		else
		{
			$result = $html;
		}

		return $result;
	}

	public static function insertDataName($html, $name, $baseName, $attributeName = 'data-name')
	{
		return preg_replace_callback('/(<input|<textarea|<select)(.*?)(\/?>)/si', static function($matches) use ($name, $baseName, $attributeName) {
			list(, $tagStart, $attributes, $tagEnding) = $matches;
			$dataName = $name;

			if (Market\Data\TextString::getPosition($attributes, $attributeName . '=') !== false) { return $matches[0]; } // attribute already exists
			if (preg_match('/type=["\']button["\']/i', $attributes)) { return $matches[0]; }

			if (preg_match('/(^|\s)name=["\'](.*?)["\']/', $attributes, $nameMatch))
			{
				$inputName = $nameMatch[2];

				if ($inputName !== $baseName && Market\Data\TextString::getPosition($inputName, $baseName) === 0)
				{
					$leftName = Market\Data\TextString::getSubstring($inputName, strlen($baseName));
					$leftName = preg_replace('/\[\d*]$/', '', $leftName);

					if ($leftName !== '')
					{
						$dataName = '[' . $dataName . ']' . $leftName;
					}
				}
			}

			return
				$tagStart
				. $attributes
				. ' '
				. ($attributeName . '="' . htmlspecialcharsbx($dataName) . '"')
				. $tagEnding;
		}, $html);
	}

	public static function delayPluginInitialization($html)
	{
		return preg_replace('/([\s"\'])js-plugin([\s"\'])/', '$1js-plugin-delayed$2', $html);
	}

	public static function sliceInputName($html)
	{
		return preg_replace('/(<input|<textarea|<select)(.*?) name=".*?"(.*?\/?>)/si', '$1$2$3', $html);
	}

	public static function stringify($attributes)
	{
		if (is_array($attributes))
		{
			$htmlAttributes = [];
			$glueMultiple = [
				'class' => ' ',
				'data-plugin' => ', ',
			];

			foreach ($attributes as $key => $value)
			{
				if (isset($glueMultiple[$key]) && is_array($value))
				{
					if (empty($value)) { continue; }

					$value = implode($glueMultiple[$key], array_unique($value));
				}

				if (is_numeric($key))
				{
					$htmlAttributes[] = $value;
				}
				else if ($value === false || $value === null)
				{
					// skip
				}
				else if (is_array($value))
				{
					$valueEncoded = Market\Utils::jsonEncode($value, JSON_UNESCAPED_UNICODE);

					$htmlAttributes[] = htmlspecialcharsbx($key) . '="' . htmlspecialcharsbx($valueEncoded) . '"';
				}
				else if ($value === true || (string)$value === '')
				{
					$htmlAttributes[] = htmlspecialcharsbx($key);
				}
				else
				{
					$htmlAttributes[] = htmlspecialcharsbx($key) . '="' . htmlspecialcharsbx($value) . '"';
				}
			}

			$result = implode(' ', $htmlAttributes);
		}
		else
		{
			$result = (string)$attributes;
		}

		return $result;
	}
}