<?php

declare(strict_types=1);

namespace org\wplake\acf_views;

use org\wplake\acf_views\AcfGroups\Item;
use org\wplake\acf_views\AcfGroups\View;

defined('ABSPATH') || exit;

class AcfView
{
    protected ACF $acf;
    protected View $view;
    protected Post $dataPost;
    protected int $pageId;
    protected string $html;

    public function __construct(ACF $acf, View $view, Post $dataPost, int $pageId, string $markup)
    {
        $this->acf      = $acf;
        $this->view     = $view;
        $this->dataPost = $dataPost;
        $this->pageId   = $pageId;
        $this->html     = $markup;
    }

    protected function injectFieldInMarkup(
        string $fieldId,
        string $fieldMarkup,
        string $markup,
        bool $isRemoveWhenEmpty
    ): string {
        $regExpFieldId = str_replace('$', '\$', $fieldId);
        $regExp        = "/<!--{$regExpFieldId}-->([\s\S]*)<!--{$regExpFieldId}-->/mi";
        preg_match_all($regExp, $markup, $originItemMatch, PREG_SET_ORDER);
        $originItemMatch = $originItemMatch[0] ?? [];

        if (2 !== count($originItemMatch)) {
            return $markup;
        }

        $itemMarkup = ! $isRemoveWhenEmpty ?
            str_replace($fieldId, $fieldMarkup, $originItemMatch[1]) :
            '';

        return str_replace($originItemMatch[0], $itemMarkup, $markup);
    }

    /**
     * @param FieldMeta $fieldMeta
     * @param Item $item
     * @param $fieldValue
     *
     * @return void
     */
    protected function insertField(
        FieldMeta $fieldMeta,
        $item,
        $fieldValue
    ): void {
        $fieldMarkup       = '';
        $isRemoveWhenEmpty = true;

        if (! ! $fieldValue ||
            $item->field->isVisibleWhenEmpty ||
            'true_false' === $fieldMeta->getType()) {
            $fieldMarkup       = new FieldMarkup($this->acf, $fieldMeta, $item->field, $fieldValue);
            $fieldMarkup       = $fieldMarkup->getMarkup();
            $isRemoveWhenEmpty = false;
        }

        $this->html = $this->injectFieldInMarkup(
            '$' . $item->field->id . '$',
            $fieldMarkup,
            $this->html,
            $isRemoveWhenEmpty
        );
    }

    public function insertFields(): void
    {
        // remove special symbols that used in the markup for a preview
        $this->html = str_replace(["\t", "\n", "\r"], '', $this->html);

        $fieldsMeta = $this->view->getFieldsMeta();
        // e.g. already filled for cache/tests
        if (! $fieldsMeta) {
            $this->view->setFieldsMeta();
            $fieldsMeta = $this->view->getFieldsMeta();
        }

        foreach ($this->view->items as $item) {
            $fieldMeta = $fieldsMeta[$item->field->getAcfFieldId()];

            // for IDE
            if (! $fieldMeta instanceof FieldMeta) {
                continue;
            }

            $fieldValue = $this->dataPost->getFieldValue($fieldMeta->getFieldId());
            $fieldValue = $fieldValue ?: $item->field->defaultValue;

            $this->insertField($fieldMeta, $item, $fieldValue);
        }
    }

    public function getHTML(): string
    {
        return $this->html;
    }
}