<?php

namespace App\Actions\ProjectTicketMetadata;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Collection;

trait ReordersProjectMetadata
{
    /**
     * @param  Collection<int, Model>  $models
     */
    private function persistOrderedModels(Collection $models): void
    {
        $temporaryOffset = ((int) $models->max('position')) + $models->count() + 1;

        $models->each(function (Model $model, int $index) use ($temporaryOffset): void {
            $model->forceFill([
                'position' => $temporaryOffset + $index,
            ])->saveQuietly();
        });

        $models->each(function (Model $model, int $index): void {
            $model->forceFill([
                'position' => $index + 1,
            ])->saveQuietly();
        });
    }

    /**
     * @param  Collection<int, Model>  $existingModels
     */
    private function reorderModels(Collection $existingModels, Model $movingModel, int $desiredPosition): void
    {
        $insertAt = max(0, min($desiredPosition - 1, $existingModels->count()));

        $existingModels->splice($insertAt, 0, [$movingModel]);

        $this->persistOrderedModels($existingModels->values());
    }
}