<?php

namespace App\Console\Commands;

use App\Post;
use App\User;
use App\Repositories\PostRepository;
use Illuminate\Console\Command;

class GeneratePosts extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'post:generate {postType} {amount?} {--user_id=}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Generate posts';

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     * @throws \Exception
     */
    public function handle()
    {
        $user_id = $this->option('user_id');
        if($user_id) {
            $user = User::find($user_id);
            if(!$user) {
                throw new \Exception("User $user_id doesn't exist");
            }
        } else {
            $user = User::inRandomOrder()->first();
            if(!$user) {
                throw new \Exception("User $user_id doesn't exist");
            }
        }
        $amount = $this->argument('amount');
        if(!$amount) {
            $amount = 1;
        }
        $postType = $this->argument('postType');
        $postTypes = config('postTypes');
        if(array_key_exists($postType, $postTypes)) {
            /** @var Post $model */
            $postRepo = new PostRepository($postTypes[$postType]['model']);
            $faker = \Faker\Factory::create();
            for($i = 0; $i < $amount; $i++) {
                $post = $postRepo->createModel();
                $post->fill([
                    'title' => $this->randomTextLength($faker, 10, 25),
                    'excerpt' => $this->randomTextLength($faker, 10, 30),
                    'introduction' => $faker->realText($faker->numberBetween(20, 400)),
                    'user_id' => $user->id
                ]);
                $post->save();
            }
        }
    }

    private function randomTextLength($faker, $min, $max)
    {
        return mb_substr($this->rtrim($faker->realText($max)), 0, $faker->numberBetween($min, $max - 1));
    }

    private function rtrim($text)
    {
        return mb_substr($text, 0, -1);
    }
}