<?php

namespace App\Exports;

use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Illuminate\Support\Facades\Schema;
use Maatwebsite\Excel\Concerns\ShouldAutoSize;
use Maatwebsite\Excel\Concerns\WithEvents;
use Maatwebsite\Excel\Events\AfterSheet;

class ExportExcel implements FromCollection, WithHeadings, ShouldAutoSize
{

    public $tableName;
    public $columnNames;
    public $exceptsColumns;
    public $module;

    public function __construct(string $tableName, $columnNames = "", $module = null) 
    {
        $this->tableName = $tableName;
        $this->module = $module ?? get("module");

        $exceptsColumns = [
            'created_at', 
            'updated_at',
            'json',
            'pic',
            'slug',
            'email_verified_at',
            'password',
            'permissions',
            'alias',
            'remember_token',
            'recover',
            'last_seen',
            'branslar',
            'ust',
            'uid',
            'note'
        ];
        /*
        try {
            $columnNames = explode(",", $columnNames);
            $this->columnNames = $columnNames;
        } catch (\Throwable $th) {
            $this->columnNames = array_diff(Schema::getColumnListing($this->tableName), $exceptsColumns);
        }
        */
        $this->columnNames = array_diff(Schema::getColumnListing($this->tableName), $exceptsColumns);


    }

    /**
    * @return \Illuminate\Support\Collection
    */
    public function collection()
    {   

        $query = db($this->tableName)
            ->select($this->columnNames);
        
        if($this->tableName == "users") {
            $query = $query->whereNotIn("level", ['Admin']);
        }

        // Apply employer view filters for weldlog-employer-view module
        if($this->module === 'weldlog-employer-view' && $this->tableName === 'weld_logs') {
            $query = $this->applyEmployerViewFilters($query);
        }

        return $query->get();
    }

    /**
     * Apply employer view specific filters to weld_logs table
     * Filters:
     * 1. Exclude records with repair_status = 'Repair' in repair_logs
     * 2. Exclude records with NDT results other than 'Accept / Годен' or empty/null
     */
    private function applyEmployerViewFilters($query)
    {
        // Filter 1: Exclude repair logs
        $repairFilter = "NOT EXISTS (
            SELECT 1 FROM repair_logs
            WHERE repair_logs.iso_number = weld_logs.iso_number
              AND repair_logs.new_joint_no = weld_logs.no_of_the_joint_as_per_as_built_survey
              AND repair_logs.repair_status = 'Repair'
        )";
        
        // Filter 2: Only acceptable NDT results
        $ndtFields = [
            'vt_result',
            'rt_result',
            'ut_result',
            'pt_result',
            'mt_result',
            'pmi_result',
            'ferrite_result',
            'ht_result'
        ];
        
        $ndtFilters = [];
        foreach ($ndtFields as $field) {
            $ndtFilters[] = "({$field} IN ('Accept / Годен', '') OR {$field} IS NULL)";
        }
        
        $ndtFilter = implode(' AND ', $ndtFilters);
        
        $combinedFilter = "({$repairFilter}) AND ({$ndtFilter})";
        
        return $query->whereRaw($combinedFilter);
    }

    public function headings(): array
    {
        return $this->columnNames;
    }
    /*
    public function registerEvents(): array
    {
        return [
                AfterSheet::class  => function(AfterSheet $event) 
                {
                    $cellRange = 'A1:G1'; // All headers
                    $event->sheet->getDelegate()->getStyle($cellRange)->getFont()->setBorder($cellRange, 'thin');
                    $event->sheet->getDelegate()->getStyle($cellRange)->getFont()->setSize(14);
                },
            ];
    }
    */
}