<?php

/*
 * This file is part of the Syspad Templates project.
 * Copyright (C) Compos Juliot
 */

namespace App\Application\Services\Twig;

use App\Application\Adapter\TwigVariableExtractorInterface;

/**
 * [description].
 */
class TwigVariableExtractorService implements TwigVariableExtractorInterface
{
    /** @var array */
    private $nestedVariablesExpressions = [
        'fieldset_row',
        'linked_product'
    ];

    /**
     * @param string $content [description]
     *
     * @return array [description]
     */
    public function extractSimpleVariables(string $content): array
    {
        $simpleVariables = [];
        $simpleRegex = '/(product\.)?(?<!media)__[a-z0-9_\\\\s]+__/';

        preg_match_all($simpleRegex, $content, $simpleVariables);
        $simpleVariables = reset($simpleVariables);

        $uniqueSimpleVariables = array_values(array_unique($simpleVariables));

        $result = $this->createSimpleVariables($uniqueSimpleVariables);

        return $result;
    }

    /**
     * @param array $variables [description]
     *
     * @return array [description]
     */
    private function createSimpleVariables(array $variables): array
    {

        $filters = [
            '__',
            '_',
            'product.',
        ];

        $data = [];
        

        foreach ($variables as $variable) {
            $forElement = \strpos($variable, $filters[2]) !== false;
            $twigVars = trim(str_replace([$filters[2]], '', $variable));
            $name = trim(str_replace([$filters[0]], '', $twigVars));
            $name = trim(str_replace([$filters[1]], ' ', $name));
            $data[$variable] = ['twigVar' => $twigVars, 'name' => $name, 'forElement' => $forElement];

        }
        // $data['forElement'] = array_map(function ($var) use ($filters) {
        //     $position = \strpos($var, $filters[2]);

        //     $filtered = $position || 0 === $position ? true : false;

        //     return $filtered;
        // }, $variables);


        // $data['twigVar'] = $twigVars;

        // $data['name'] = array_map(function ($twigVar) use ($filters) {
        //     return trim(str_replace([$filters[0], $filters[1]], ' ', $twigVar));
        // }, $twigVars);

        return $data;
    }

    /**
     * @param string $content [description]
     *
     * @return array [description]
     */
    public function extractNestedVariables(string $content): array
    {
        $data = [];
        foreach ($this->nestedVariablesExpressions as $expression) {
            $nestedVariables = [];

            $nestedRegex = '/{% (for ' . $expression . ' in )(.*?) %}|(?<='.$expression.'.)(.*?)(?=\s*\)|\s*}}|\s*\||\s|\s*,)/';

            preg_match_all($nestedRegex, $content, $nestedVariables);
            $nestedVariables = array_unique(reset($nestedVariables));

            $nestedExpression = $this->createNestedVariables($nestedVariables, $expression);
            $data = array_merge($data, $nestedExpression);
        }

        return $data;
    }

    /**
     * @param array  $variables  [description]
     * @param string $expression [description]
     *
     * @return array [description]
     */
    private function createNestedVariables(array $variables, string $expression): array
    {
        $parentFilters = [
            '{%',
            "for $expression in",
            '%}',
            'product.',
            '_',
            'if not break',
        ];

        $childFilters = [
            '{{',
            'txtToXml(',
            "$expression.",
            ")",
            '}}',
        ];

        $data = [];
        $parentName = '';
        $parentTwigVar = '';
        $forElement = false;
        foreach ($variables as $variable) {
            if (false !== strpos($variable, $parentFilters[1])) {
                $parentTwigVar = trim(\str_replace([$parentFilters[0], $parentFilters[1], $parentFilters[2], $parentFilters[3], $parentFilters[5]], '', $variable));
                $parentName = trim(\str_replace($parentFilters[4], ' ', $parentTwigVar));
                $forElement = \strpos($variable, $parentFilters[3]) !== false ;

                $data[$parentTwigVar] = ['twigVar' => $parentTwigVar, 'name' => $parentName, 'forElement' => $forElement, 'inputs' => []];
            } else {
                $variableName = trim(\str_replace([$childFilters[0], $childFilters[1], $childFilters[2], $childFilters[3], $childFilters[4]], ' ', $variable));
                $name = \str_replace($parentFilters[4], ' ', $variableName);

                $data[$parentTwigVar]['inputs'][] = ['variableName' => $variableName, 'name' => $name];
            }
        }
        return $data;
    }
}