<?php

namespace App\Exports;

use App\Models\Transaction;
use Illuminate\Support\Facades\DB;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;

class TransactionDealerExport implements FromCollection
{

    protected $dealer;
    protected $month;

    function __construct($request) {
        $this->month  = (isset($request->dealer)) ? $request->query('month') : date('m');
        $this->dealer = (isset($request->dealer)) ? $request->query('dealer') : 'all';
    }

    /**
    * @return \Illuminate\Support\Collection
    */
    public function collection()
    {
        $dealer_work_trx = DB::statement("SET @sql = NULL");
        $sql = "SELECT IF(work_id IS NOT NULL, GROUP_CONCAT(DISTINCT CONCAT('SUM(IF(work_id = \"', work_id,'\", qty,\"\")) AS \"',CONCAT(w.name, '|',w.id),'\"')), 's.work_id') INTO @sql FROM transactions t JOIN works w ON w.id = t.work_id WHERE month(t.date) = '". $this->month ."' and year(t.date) = '". date('Y') ."' and t.deleted_at is null";

        if(isset($this->dealer) && $this->dealer != 'all') {
            $sql .= " and t.dealer_id = '". $this->dealer ."'";
        }

        $dealer_work_trx = DB::statement($sql);
        
        if(isset($this->dealer) && $this->dealer != 'all') {
            $dealer_work_trx = DB::statement("SET @sql = IF(@sql != 's.work_id' ,CONCAT(\"SELECT d.name as DEALER, d.id as dealer_id,  \", @sql, \"FROM transactions s JOIN dealers d ON d.id = s.dealer_id WHERE month(s.date) = '". $this->month ."' and year(s.date) = '". date('Y') ."' and s.deleted_at is null and s.dealer_id = '". $this->dealer ."' GROUP BY s.dealer_id ORDER BY s.dealer_id ASC\"), CONCAT(\"SELECT d.name as DEALER \", \"FROM transactions s JOIN dealers d ON d.id = s.dealer_id WHERE month(s.date) = '". $this->month ."' and year(s.date) = '". date('Y') ."' and s.deleted_at is null and s.dealer_id = '". $this->dealer ."' GROUP BY s.`dealer_id` ORDER BY s.`dealer_id` ASC\"))");
        }else{
            $dealer_work_trx = DB::statement("SET @sql = IF(@sql != 's.work_id' ,CONCAT(\"SELECT d.name as DEALER, d.id as dealer_id,  \", @sql, \"FROM transactions s JOIN dealers d ON d.id = s.dealer_id WHERE month(s.date) = '". $this->month ."' and year(s.date) = '". date('Y') ."' and s.deleted_at is null GROUP BY s.dealer_id ORDER BY s.dealer_id ASC\"), CONCAT(\"SELECT d.name as DEALER, d.id as dealer_id \", \"FROM transactions s JOIN dealers d ON d.id = s.dealer_id WHERE month(s.date) = '". $this->month ."' and year(s.date) = '". date('Y') ."' and s.deleted_at is null GROUP BY s.`dealer_id` ORDER BY s.`dealer_id` ASC\"))");
        }
        
        $dealer_work_trx = DB::statement("PREPARE stmt FROM @sql");
        $dealer_work_trx = DB::select(DB::raw("EXECUTE stmt"));
        DB::statement('DEALLOCATE PREPARE stmt');
        
        $work_trx = [];
        foreach($dealer_work_trx as $index => $dealer_work) {
            $dealer_work_2 = (array) $dealer_work;
            unset($dealer_work_2['dealer_id']);
            $work_names = array_keys($dealer_work_2);
            if($index == 0) {
                $work_names_e = [];
                foreach($work_names as $work) {
                    $arr_work = explode('|', $work);
                    $work_names_e[] = $arr_work[0];
                }
                $work_trx[] = $work_names_e;
                $work_trx[] = array_values($dealer_work_2);
            }else{
                $work_trx[] = array_values($dealer_work_2);
            }
        }

        return collect($work_trx);
    }


    // public function headings(): array
    // {
    //     return $this->theads;
    // }

    // public function actions(Request $request)
    // {
    //     return [
    //         (new DownloadExcel)->withHeadings('Tanggal', 'Mekanik', 'SA', 'No.Polisi', 'Warranty', 'Kategori', 'Qty')
    //     ];
    // }
}