<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\ValidationRule;
use Illuminate\Database\Eloquent\Model;

/**
 * Check if the max count of children element is reached.
 *
 * @package App\Rules
 */
class IsMaxChildrenReached implements ValidationRule
{
    /**
     * Construct method.
     *
     * @param Model        $parentModel  The parent Model.
     * @param string       $relationName The name of the relation (used in whereRelation()).
     * @param integer      $max          The max count of children allowed.
     * @param integer|null $idToIgnore   The id of the children model to ignore.
     * @return void
     */
    public function __construct(
        private Model $parentModel,
        private string $relationName,
        private int $max,
        private int|null $idToIgnore = null
    ) {
    }

    /**
     * Run the validation rule.
     *
     * @param string                                                               $attribute
     * @param mixed                                                                $value
     * @param \Closure(string):\Illuminate\Translation\PotentiallyTranslatedString $fail
     * @return void
     * @phpcs:disable Generic.CodeAnalysis.UnusedFunctionParameter.FoundInImplementedInterfaceBeforeLastUsed
     * @phpcs:disable Squiz.Commenting.FunctionComment.IncorrectTypeHint
     */
    public function validate(string $attribute, mixed $value, \Closure $fail): void
    {
        $children = $this->parentModel->where('id', $value)->first()->{$this->relationName};
        if (!is_null($this->idToIgnore)) {
            $children = $children->where('id', '!==', $this->idToIgnore);
        }
        if ($children->count() >= $this->max) {
            $parentName   = str($this->parentModel->getTable())->singular();
            $childrenName = str($this->parentModel->{$this->relationName}()->getModel()->getTable())->singular();

            $fail(trans('crud.messages.rule_max_reached', [
                'parent' => str(trans_choice('models.classes.' . $parentName, 1))->title(),
                'max' => $this->max,
                'children' => str(trans_choice('models.classes.' . $childrenName, 1))->title()->plural()
            ]));
        }
    }
}