<?php

namespace App\Admin\Imports;

use App\Exceptions\ImportException;
use Box\Spout\Reader\Common\Creator\ReaderEntityFactory;
use Illuminate\Support\Facades\Storage;
use App\Models\{ProductSpu, ProductCategory, ProductGroup};
use Illuminate\Support\Str;

class Product
{
    public function load($file)
    {
        $reader = ReaderEntityFactory::createXLSXReader();
        $reader->open($file);

        foreach ($reader->getSheetIterator() as $sheet) {
            foreach ($sheet->getRowIterator() as $num => $row) {
                if ($num === 1) {
                    continue;
                }
                $cells = $row->toArray();
                
                $goods = [
                    'name' => $cells[0],
                    'subtitle' => $cells[1],
                    'shipping_template_id' => 1,
                ];
                $category = ProductCategory::where('name', $cells[2])->firstOrFail();
                $goods['category_id'] = $category->id;

                // 图片组
                if ($path = $cells[3]) {
                    if (Str::startsWith($path, ['http://', 'https://'])) {
                        $images = explode(',', $path);
                    } else {
                        $images = $this->getImageUrlFromPath($path);
                    }
                    if (count($images) > 0) {
                        $goods['cover'] = $images[0];
                        $goods['images'] = $images;
                    }
                }

                // 运费模板
                if ($cell_11 = data_get($cells, 11)) {
                    $goods['shipping_template_id'] = $cell_11;
                }
                // 重量
                if ($cell_12 = data_get($cells, 12)) {
                    $goods['weight'] = $cell_12;
                }
                // 详细描述
                if ($cell_13 = data_get($cells, 13)) {
                    $description = '';
                    foreach(explode(',', $cell_13) as $item) {
                        $description .= '<p><img src="'.$item.'"/></p>';
                    }
                    $goods['description'] = $description;
                }

                $goods = array_merge($goods, [
                    'sell_price' => $cells[4] * 100,
                    'market_price' => $cells[5] * 100,
                    'cost_price' => $cells[6] * 100,
                    'vip_price' => $cells[7] * 100,
                    'sales_value' => $cells[8] * 100,
                ]);

                $product = ProductSpu::updateOrCreate(['name' => $goods['name']],$goods);

                // 属性规格
                $coll_9 = data_get($cells, 9);
                $cell_10 = data_get($cells, 10);
                if ($coll_9) {
                    $format_specs = $this->formatAttr($coll_9);
                    $format_attrs = $this->formatAttr($cell_10);
                    $spec_group = $this->getSpec($cells[0], $coll_9, $cell_10);

                    $attrs = [];
                    foreach($spec_group->attrs as $index => $item) {
                        $attr = ['name' => $item['title'], 'attrs' => []];
                        foreach(explode(PHP_EOL, $item['value']) as $value) {
                            array_push($attr['attrs'], ['name' => $value, 'value' => data_get($format_attrs, "$index.values.$value")]);
                        }
                        array_push($attrs, $attr);
                    }
                    $product->update(['attrs' => $attrs]);

                    $specs = [];
                    $product->specs()->delete();
                    foreach($spec_group->specs as $index => $item) {
                        $spec = ['name' => $item['title'], 'items' => []];
                        foreach(explode(PHP_EOL, $item['value']) as $value) {
                            array_push($spec['items'], ['name' => $value, 'value' => data_get($format_specs, "$index.values.$value")]);
                        }
                        array_push($specs, $spec);
                    }
                    $product->specs()->createMany($specs);
                }
            }
        }

        $reader->close();
    }

    protected function getImageUrlFromPath($dir)
    {
        $disk = Storage::disk();
        $files = $disk->files($dir);
        $images = [];

        foreach($files as $filename) {
            array_push($images, $disk->url($filename));
        }

        return $images;
    }

    protected function getSpec($name, $specs, $attrs)
    {
        if (Str::contains($specs, ':')) {
            // 创建新的规格
            $spec = ProductGroup::updateOrCreate([
                'name' => $name
            ], [
                'attrs' => $this->formatGroupAttr($this->formatAttr($attrs)),
                'specs' => $this->formatGroupAttr($this->formatAttr($specs))
            ]);
        } else {
            $spec = ProductGroup::where('name', $specs)->firstOrFail();
        }

        return $spec;
    }

    /**
     * 颜色[灰色:0,银色:0]
     * 尺寸[13寸:0,14寸:500,16寸:1000]
     * 处理器[M1:0,M1 Pro:1000,M1 Max:1500]
     * 内存[8G:0,16G:1000,32G:2000]
     * 硬盘[256G:0,512G:1000,1TB:2000]
     * 
     * [
     *   ['name' => '颜色', 'values' => ['灰色' => 0, '银色' => 0]],
     *   ['name' => '尺寸', 'values' => ['13寸' => 0, '14寸' => 500, '16寸' => '1000']]
     *   ...
     * ]
     */
    protected function formatAttr($attrs)
    {
        $attr_data = [];
        if (!Str::contains($attrs, ':')) {
            return $attr_data;
        }
        foreach(explode("\n", $attrs) as $item) {
            $name = explode('[', $item)[0];
            $attr_values = [];
            foreach(explode(',', Str::between($item, '[', ']')) as $item1) {
                $item1_explode = explode(':', $item1);
                $attr_values[$item1_explode[0]] = $item1_explode[1];
            }
            array_push($attr_data, ['name' => $name, 'values' => $attr_values]);
        }

        return $attr_data;
    }

    protected function formatGroupAttr($data)
    {
        $list = [];
        foreach($data as $item) {
            array_push($list, ['title' => $item['name'], 'value' => implode(PHP_EOL, array_keys($item['values']))]);
        }
        return $list;
    }
}