<?php

namespace IvyForms\Services\Field;

// phpcs:disable PSR1.Files.SideEffects
if (!defined('ABSPATH')) {
    exit; // Exit if accessed directly
}

use IvyForms\Common\Exceptions\NotFoundException;
use IvyForms\Entity\Field\Field;
use IvyForms\Common\Exceptions\InvalidArgumentException;
use IvyForms\Repository\Field\FieldRepositoryInterface;

class FieldService
{
    private FieldRepositoryInterface $fieldRepository;

    // Constructor injection for the FieldRepository via PHP-DI
    public function __construct(FieldRepositoryInterface $fieldRepository)
    {
        $this->fieldRepository = $fieldRepository;
    }

    /**
     * Create a new field.
     *
     * @param Field $fieldData
     *
     * @return int Form ID
     *
     * @throws InvalidArgumentException If the field data is invalid
     */
    public function addField(Field $fieldData): int
    {
        // Validate form data
        if (empty($fieldData->getFormId())) {
            throw new InvalidArgumentException('Form id is required.');
        }

        // Create form via repository and return new form ID
        return $this->fieldRepository->add($fieldData);
    }


    /**
     * Update an existing field.
     *
     * @param int $fieldId
     * @param Field $fieldData
     *
     * @return bool
     *
     * @throws InvalidArgumentException If the form data is invalid
     */
    public function updateField(int $fieldId, Field $fieldData): bool
    {
        // Validate form data before updating
        if (empty($fieldData->getId())) {
            throw new InvalidArgumentException('Filed id is required.');
        }

        return $this->fieldRepository->update($fieldId, $fieldData);
    }

    /**
     * Delete a field by its ID.
     *
     * @param int $fieldId
     * @return int
     */
    public function deleteField(int $fieldId): int
    {
        return $this->fieldRepository->delete($fieldId);
    }

    /**
     * Get fields by form ID
     *
     * @param int $id
     *
     * @return mixed[]|null
     */
    public function getAllFields(int $id): ?array
    {
        return $this->fieldRepository->getFieldsById($id);
    }

    /**
     * Delete fields by form ID
     *
     * @param int $id
     *
     * @throws NotFoundException
     * @throws InvalidArgumentException
     */
    public function deleteFieldsByFormId(int $id): void
    {
        $fields = $this->getAllFields($id);

        if (!$fields) {
            return;
        }

        foreach ($fields as $field) {
            $this->deleteField($field->getId());
        }
    }
}