<?php

namespace App\Helpers;

use App\Enums\DynamicFieldTypes;
use Illuminate\Support\Str;
use Illuminate\Database\Eloquent\Model;
use Uwil\LaravelCommon\Helpers\FileHelper;

class DynamicPageHelper
{
    /**
     * Remove imgs from wysiwyg OR dynamic wysiwyg OR image input.
     *
     * @param Model $model
     * @param bool $forceDeleteImage In forceDelete event we need to ensure all the images will be destroyed
     * @return void
     */
    public static function removeImgs(Model $model, $forceDeleteImage = false): void
    {
        $locale = config('app.locale');
        $model = $model->load('config');

        $currentContent  = json_decode($model->getAttributes()['content'], true);
        $originalContent = $model->getOriginal('content');

        $currentContentLocal  = is_array($currentContent[$locale]) ? $currentContent[$locale] : ["text_" => $currentContent[$locale]];
        $originalContentLocal = is_array($originalContent[$locale]) ? $originalContent[$locale] : ["text_" => $originalContent[$locale]];
        static::removeDynamicImages($model, $originalContentLocal, $currentContentLocal, $forceDeleteImage);
        static::removeWysiwygImages($originalContentLocal, $currentContentLocal);
    }

    /**
     * Remove imgs from image inputs.
     *
     * @param Model $model
     * @param array $oldContent
     * @param array $newContent
     * @param bool $forceDeleteImage In forceDelete event we need to ensure all the images will be destroyed
     * @return void
     */
    protected static function removeDynamicImages(Model $model, array $oldContent, array $newContent, bool $forceDeleteImage): void
    {
        $prefix = DynamicFieldTypes::image->name . '_';
        $allKeys = static::getDynamicFieldKeys($oldContent, $newContent, $prefix);
        foreach ($allKeys as $key) {
            $old = $oldContent[$key] ?? null;
            $new = $newContent[$key] ?? null;
            // Cas 1 : Valeurs identiques
            if ((is_string($old) === is_string($new)) && $forceDeleteImage) {
                // In this case we need to remove the actual file, not the old as we do in other conditions
                FileHelper::removeFile($model, "content.$key");
            }
            // // Cas 2 : ancienne = string, nouvelle = null → suppression
            if (is_string($old) && is_null($new)) {
                // Action suppression
                FileHelper::removeOldFile($model, "content.$key");
                continue;
            }

            // // Cas 3 : ancienne = null, nouvelle = string → ajout

            // // Cas 4 : ancienne = string, nouvelle = autre string → remplacement
            if (is_string($old) && is_string($new) && $old !== $new) {
                FileHelper::removeOldFile($model, "content.$key");
                continue;
            }
        }
    }

    /**
     * Remove imgs from wysiwygs.
     *
     * @param array $oldContent
     * @param array $newContent
     * @return void
     */
    protected static function removeWysiwygImages(array $oldContent, array $newContent): void
    {
        $prefix = DynamicFieldTypes::text->name . '_';

        static::getDynamicFieldKeys($oldContent, $newContent, $prefix)
        ->each(function ($key) use ($oldContent) {
            $old = $oldContent[$key] ?? null;
            FileHelper::removeOldModelFilesFromHtml('', $old);
        });
    }

    /**
     * Get the field keys of wysiwygs or images field input and group them.
     *
     * @param array $oldContent
     * @param array $newContent
     * @return \Illuminate\Support\Collection
     */
    protected static function getDynamicFieldKeys(array $oldContent, array $newContent, string $prefix): \Illuminate\Support\Collection
    {
        $filter = fn($value, $key) => Str::startsWith($key, $prefix);
        $old = collect($oldContent)->filter($filter);
        $new = collect($newContent)->filter($filter);
        return $new->keys()->merge($old->keys())->unique();
    }
}