<?php

namespace App\Filament\Fields;

use Filament\Forms\Components\Textarea;
use Filament\Support\Enums\FontFamily;
use Illuminate\Support\Js;

class MathEditor extends Textarea
{
    protected string $view = 'filament.fields.math-editor';

    protected int $columns = 12;

    protected function setUp(): void
    {
        parent::setUp();

        $this->columnSpan('full');
        $this->rows(8);
        $this->fontFamily(FontFamily::Mono);
        $this->placeholder('Enter LaTeX code here... e.g., $f(x) = ax^2 + bx + c$');
        $this->helperText('Supported formats: $...$, $$...$$, \(...\), \[...\]');
    }

    public function columns(int $columns): static
    {
        $this->columns = $columns;
        return $this;
    }

    public function getColumns(): int
    {
        return $this->columns;
    }

    public static function getPreview(string $value): ?string
    {
        if (empty($value)) {
            return null;
        }

        // 简单预览：不渲染 LaTeX，仅显示原始内容
        return $value;
    }
}