<?php

namespace App\Http\Controllers\Api;

use App\Models\Group;
use App\Models\Trading;
use App\Transformers\TradingTransformer;
use Illuminate\Http\Request;

use function PHPUnit\Framework\isEmpty;

class TradingsController extends ApiController
{
    public function index(Request $request)
    {
        $last_tradings =  Group::where("type", "trading")->with("tradings")->latest()->first()->tradings;
        $last_tradings = $last_tradings->unique('title');

        $tradings = [];
        foreach($last_tradings as $trading){
            $title = trim(strtok($trading->title, '('));
            $before_last_trading = Trading::where("title",'LIKE', "%{$title}%")->where('group_id', '!=', $trading->group_id)->latest()->first();

            $difference = !$before_last_trading ? 0 : $this->getPercentageDifference($trading->price ?? 0, $before_last_trading->price ?? 0);
            
            array_push($tradings, (object)[
                    'id' => $trading->id,
                    'title' => $title,
                    'unit' => $trading->unit,
                    'price' => $trading->price,
                    'old_price' => !$before_last_trading ? 0 : $before_last_trading->price,
                    'price_change' => number_format($difference, 1, ".", "")."%",
                    'amount' => $trading->amount,
                    'currency' => $trading->currency,
                    'seller_country' => $trading->seller_country,
                    'buyer_country' => $trading->buyer_country,
                    'point' => $trading->point,
            ]);
        }

        $tradings = Trading::hydrate($tradings);

        return $this->respondWithCollection($tradings, new TradingTransformer);
        dd($tradings);

    }

    function getPercentageDifference($new, $old){
        // return (($new - $old) / $old) * 100;
        // return (abs(($old - $new)) / ($old + $new) /2);
        // return (abs($old - $new) / (($old + $new)/ 2)) * 100;
        // return (abs($old - $new) / (($old + $new)/ 2)) * 100;
        return (($new - $old) / abs($old)) * 100;
    }
}