<?php

namespace App\Services\BlogPost;

use App\Livewire\BlogPost\ListView;
use App\Models\BlogPost;
use App\Models\Tag;
use App\Models\User;
use Illuminate\Database\Eloquent\Relations\MorphToMany;
use Illuminate\Database\Eloquent\Relations\Relation;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Str;

class ListViewService
{
    private ListView $parentState;

    public function __construct(ListView $parent)
    {
        $this->parentState = $parent;
    }

    public function buildBlogPosts(): BlogPost
    {
        $recipes = $this->getPrimaryCriteriedBlogPosts();

        return $this->getSecondaryCriteriedBlogPosts($recipes);
    }

    private function getPrimaryCriteriedBlogPosts(): Builder|BlogPost|MorphToMany|array
    {
        if ($this->parentState->author) {
            $posts = $this->getAuthorBlogPosts();
        } elseif ($this->parentState->tag) {
            $posts = $this->getTagBlogPosts();
        } elseif ($this->parentState->search && mb_strlen($this->parentState->search) > 2) {
            $posts = $this->getSearchBlogPosts();
        } else {
            $posts = (new BlogPost());
        }

        return $posts;
    }

    private function getSecondaryCriteriedBlogPosts(Builder|BlogPost|MorphToMany|array $posts): BlogPost
    {
        if ($this->parentState->typeFilter === 'user') {
            $posts = $posts->whereRelation('author', 'is_consultant', false);
        }

        if ($this->parentState->typeFilter === 'consultant') {
            $posts = $posts->whereRelation('author', 'is_consultant', true);
        }

        return $posts;
    }

    private function getAuthorBlogPosts(): array
    {
        $author = $this->parentState->author;
        $user = User::find($author);

        return $user ? $user->author_of_blog_post()->distinct() : [];
    }

    private function getTagBlogPosts(): MorphToMany
    {
        $tagId = Str::of($this->parentState->tag)->split('/-/')->first();
        return Tag::find($tagId)->blogPosts();
    }

    private function getSearchBlogPosts(): Builder
    {
        return BlogPost::where('title', 'rlike', $this->parentState->search);
    }

    // private function getTagsCollection(): array
    // {
    //     return Recipe::all()->map(
    //         fn($r) => [
    //             $r->type,
    //             $r->tags->map(fn($t) => $t->id . '-' . $t->name)->all(),
    //         ]
    //     )->reduce(function ($acc, $item) {
    //         [$type, $tagNames] = $item;
    //
    //         foreach ($tagNames as $name) {
    //             if (isset($acc[$type][$name])) {
    //                 $acc[$type][$name] += 1;
    //             } else {
    //                 $acc[$type][$name] = 1;
    //             }
    //         }
    //
    //         return $acc;
    //     });
    // }
}