<?php
/**
 * Quote Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2022. Quote Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Export\CSV;

use App\Libraries\MultiDB;
use App\Models\Company;
use App\Models\Quote;
use App\Transformers\QuoteTransformer;
use App\Utils\Ninja;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\App;
use League\Csv\Writer;

class QuoteItemExport extends BaseExport
{

    private $quote_transformer;

    public string $date_key = 'date';

    public Writer $csv;

    private array $storage_array = [];
    private array $storage_item_array = [];

    private array $decorate_keys = [
        'client',
        'currency',
    ];

    public function __construct(Company $company, array $input)
    {
        $this->company = $company;
        $this->input = $input;
        $this->quote_transformer = new QuoteTransformer();
    }

    public function init(): Builder
    {

        MultiDB::setDb($this->company->db);
        App::forgetInstance('translator');
        App::setLocale($this->company->locale());
        $t = app('translator');
        $t->replace(Ninja::transformTranslations($this->company->settings));
        
        if (count($this->input['report_keys']) == 0) {
            $this->input['report_keys'] = array_values($this->mergeItemsKeys('quote_report_keys'));
        }

        $this->input['report_keys'] = array_merge($this->input['report_keys'], array_diff($this->forced_client_fields, $this->input['report_keys']));

        $query = Quote::query()
                            ->withTrashed()
                            ->with('client')->where('company_id', $this->company->id)
                            ->where('is_deleted', 0);

        $query = $this->addDateRange($query);

        return $query;

    }
    
    public function returnJson()
    {
        $query = $this->init();

        $headerdisplay = $this->buildHeader();

        $header = collect($this->input['report_keys'])->map(function ($key, $value) use($headerdisplay){
                return ['identifier' => $key, 'display_value' => $headerdisplay[$value]];
            })->toArray();

            $query->cursor()
                ->each(function ($resource) {
                    $this->iterateItems($resource);
                                    
                    foreach($this->storage_array as $row) {
                        $this->storage_item_array[] = $this->processItemMetaData($row, $resource);
                    }

                    $this->storage_array = [];
                                    
                });
                            
            return array_merge(['columns' => $header], $this->storage_item_array);

    }


    public function run()
    {
      
        //load the CSV document from a string
        $this->csv = Writer::createFromString();

       $query = $this->init();

        //insert the header
        $this->csv->insertOne($this->buildHeader());

       
        $query->cursor()
            ->each(function ($quote) {
                $this->iterateItems($quote);
            });

        $this->csv->insertAll($this->storage_array);
        
        return $this->csv->toString();

    }

    private function iterateItems(Quote $quote)
    {
        $transformed_quote = $this->buildRow($quote);

        $transformed_items = [];

        foreach ($quote->line_items as $item) {
            $item_array = [];      

            foreach (array_values(array_intersect($this->input['report_keys'], $this->item_report_keys)) as $key) { //items iterator produces item array
                
                if (str_contains($key, "item.")) {

                    $key = str_replace("item.", "", $key);
                    
                    if($key == 'type_id')
                        $key = 'type';

                    if($key == 'tax_id')
                        $key = 'tax_category';

                    if (property_exists($item, $key)) {
                        $item_array[$key] = $item->{$key};
                    } 
                    else {
                        $item_array[$key] = '';
                    }
                }
            }
            
            $transformed_items = array_merge($transformed_quote, $item_array);
            $entity = $this->decorateAdvancedFields($quote, $transformed_items);
            $entity = array_merge(array_flip(array_values($this->input['report_keys'])), $entity);

            $this->storage_array[] = $entity;
        }
    }

    private function buildRow(Quote $quote) :array
    {
        $transformed_quote = $this->quote_transformer->transform($quote);

        $entity = [];

        foreach (array_values($this->input['report_keys']) as $key) {
           
            $parts = explode('.', $key);

            if(is_array($parts) && $parts[0] == 'item') {
                continue;
            }

            if (is_array($parts) && $parts[0] == 'quote' && array_key_exists($parts[1], $transformed_quote)) {
                $entity[$key] = $transformed_quote[$parts[1]];
            } elseif (array_key_exists($key, $transformed_quote)) {
                $entity[$key] = $transformed_quote[$key];
            } else {
                $entity[$key] = $this->resolveKey($key, $quote, $this->quote_transformer);
            }
        }


        return $this->decorateAdvancedFields($quote, $entity);
    }
    private function decorateAdvancedFields(Quote $quote, array $entity) :array
    {
        if (in_array('currency_id', $this->input['report_keys'])) {
            $entity['currency'] = $quote->client->currency() ? $quote->client->currency()->code : $quote->company->currency()->code;
        }

        if (in_array('client_id', $this->input['report_keys'])) {
            $entity['client'] = $quote->client->present()->name();
        }

        if (in_array('status_id', $this->input['report_keys'])) {
            $entity['status'] = $quote->stringStatus($quote->status_id);
        }

        return $entity;
    }
}