<?php

declare(strict_types=1);

namespace DigiComp\AttachmentViewUtility;

use Neos\Eel\CompilingEvaluator;
use Neos\Eel\Context;
use Neos\Eel\Helper\ArrayHelper;
use Neos\Eel\Helper\StringHelper;
use Neos\Flow\Annotations as Flow;
use Neos\Flow\I18n\EelHelper\TranslationHelper;
use Neos\FluidAdaptor\View\TemplateView;
use Neos\Utility\TypeHandling;

trait EelFilenameTrait
{
    protected string $eelExpressionOptionKey = 'filenameEelExpression';

    protected function addOptionFilenameEelExpression(): void
    {
        if (\property_exists($this, 'supportedOptions')) {
            $this->supportedOptions['filenameEelExpression'] = [
                null,
                'Callable which creates a filename from variables',
                'string',
                true,
            ];
        } else {
            throw new \RuntimeException('supported option could not be set', 1697552694);
        }
    }

    protected function getAttachmentName(): string
    {
        if ($this instanceof TemplateView) {
            $variables = $this->getRenderingContext()->getVariableProvider()->getAll();
        } elseif (\property_exists($this, 'variables')) {
            $variables = $this->variables;
        } else {
            throw new \RuntimeException(
                'No variables can be detected for this kind of view: ' . TypeHandling::getTypeForValue($this),
                1697550214
            );
        }
        if (!\property_exists($this, 'options')) {
            throw new \RuntimeException('Your view options could not be found', 1697550440);
        }
        $expression = $this->options[$this->eelExpressionOptionKey];

        return $this->getEelResult($expression, $variables);
    }

    protected function getEelResult(string $expression, array $contextVariables)
    {
        $context = new Context(\array_merge($contextVariables, [
            'Array' => new ArrayHelper(),
            'String' => new StringHelper(),
            'Translation' => new TranslationHelper(),
        ]));
        $this->emitFilenameEelExpressionContext($context);
        return (new CompilingEvaluator())->evaluate($expression, $context);
    }

    /**
     * @SuppressWarnings("unused")
     */
    #[Flow\Signal]
    protected function emitFilenameEelExpressionContext(Context $context): void
    {
    }
}