<?php

namespace App\Http\Controllers;

use App\Http\Requests\SaveProductRequest;
use App\Models\Product;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Redirect;
use Illuminate\Support\Str;


class ProductController extends Controller
{
    public function index(Request $request)
    {
        $data = $request->validate([
            's' => 'nullable|string',
            's_series' => 'nullable|string',
            's_price_min' => 'nullable|integer',
            's_price_max' => 'nullable|integer',
            'perpage' => 'nullable|string',
        ]);

        $query = Product::query();
        if (!empty($data['s'])) {
            $query->whereRaw(" (`article` LIKE '%{$data['s']}%' OR `name` LIKE '%{$data['s']}%' OR
                    `name_for_form` LIKE '%{$data['s']}%' OR `product_group` LIKE '%{$data['s']}%' OR
                    `characteristics` LIKE '%{$data['s']}%' OR `tech_description` LIKE '%{$data['s']}%'
                    OR `tech_description_short` LIKE '%{$data['s']}%') ");
        }

        if (!empty($data['s_series'])) {
            $query->where('series', '=', $data['s_series']);
        }

        if (!empty($data['s_price_min'])) {
            $query->where('price', '>=', $data['s_price_min']);
        }

        if (!empty($data['s_price_max'])) {
            $query->where('price', '<=', $data['s_price_max']);
        }

        $query->orderBy('series');

        $data['products'] = $query->paginate($data['perpage'] ?? 20)->withQueryString();

        // get all series for select field
        $data['series'] = Product::query()->select('series')->distinct()->OrderBy('series')->get();
        return view('products.index', $data);
    }

    // todo вынести в job, чтобы работала в фоне
    public function upload_xls(Request $request)
    {
        $xls = \PhpOffice\PhpSpreadsheet\IOFactory::createReaderForFile($request->file('file'));
        $xls->setReadDataOnly(true);
        $sheet = $xls->load($request->file('file'));

        // read xls to array
        $goods = $sheet->setActiveSheetIndex(0)->toArray();
        unset($sheet, $xls);

        $series = '';
        $i = 0;
        $created = 0;
        $updated = 0;
        $no_image = [];
        foreach ($goods as $good) {
            // check first line and skip it
            if ($good[0] === '№п/п' && $good['3'] === 'Наименование') continue;

            // check the line is name of series
            if ($good[0] == NULL && $good[1] == NULL && $good[2] == NULL && is_string($good[3])) {
                $series = $good[3];
                continue;
            }
            $tmp = explode("\n", $good[3]);
            if (!isset($tmp[1])) {
                $good[3] = preg_replace('!\s+!', ' ', $good[3]);
                $tmp = explode(' ', $good[3], 2);
            }
            $images = $this->find_images($tmp[0]);
            $data = [
//                'article' => $tmp[0],
                'series' => $series,
                'name' => (isset($tmp[1])) ? $tmp[1] : 'error',
                'name_for_form' => $good[2],
                'product_group' => $good[1],
                'price' => $good[5],
                'characteristics' => $good[4],
                'tech_description' => $good[7],
                'tech_description_short' => $good[8],
                'image_path' => (!empty($images)) ? $images[0] : $images,
            ];

            $a = Product::query()->updateOrCreate(['article' => $tmp[0]], $data);
            if ($a->wasRecentlyCreated) $created++; else $updated++;
            //echo $i++ . '. Серия: ' . $series . ', артикул: ' . $tmp[0] . '<br>';
            $i++;
            if ($data['image_path'] == '') $no_image[] = $tmp[0];
        }

        return view('products.import_result', ['count' => $i, 'updated' => $updated, 'created' => $created, 'no_image' => $no_image]);

    }

    private $allfiles; // remember files list

    private function find_images($article)
    {
        $path_to_files = './' . env('IMAGES_PATH', '---') . '/';
        if (!isset($this->allfiles) || empty($this->allfiles)) {
            $this->allfiles = scandir($path_to_files);
        }
        $images = [];
        foreach ($this->allfiles as $filename) {
            if ((mb_strpos($filename, $article) === 0) || (
                    mb_strpos(Str::lower($filename), Str::slug($article)) === 0))
                $images[] = $filename;
        }
        return (!empty($images)) ? $images : '';
    }

    public function product(Request $request, $id)
    {
        $data['product'] = Product::query()->findOrFail($id);
        $data['images'] = $this->find_images($data['product']->article);
        return view('products.product', $data);
    }

    public function save_product(SaveProductRequest $request)
    {
        Product::query()->where('id', $request->validated('id'))->update($request->validated());
        return redirect()->route('index');
    }

    public function upload_image(Request $request){
        $path = public_path() . '/' . env('IMAGES_PATH');
//        dd($path);
        $file = $request->file('filename');
        $new_filename = $request->article . '.' . date('YmdHis') . '.' . $file->extension();
        $file->move($path, $new_filename);
        Product::query()->where('article', $request->article)->update(['image_path' => $new_filename]);
        return redirect()->back();
    }

    public function update_image(Request $request, $id){
        $validated = $request->validate(['image_path' => 'required|string']);
        Product::query()->where('id', $id)->update($validated);
        return redirect()->route('view_product', $id);
    }

    public function select_export(Request $request){
        $data['ids'] = json_decode($request->ids, true);
        $data['products'] = Product::query()->whereIn('id', $data['ids'])->get();
        return view('products.select_export', $data);
    }

}