<?php

namespace App\Filament\Imports;

use App\Models\PalletValidation;
use App\Models\Plant;
use App\Models\User;
use Carbon\Carbon;
use Filament\Actions\Imports\Exceptions\RowImportFailedException;
use Filament\Actions\Imports\ImportColumn;
use Filament\Actions\Imports\Importer;
use Filament\Actions\Imports\Models\Import;
use Str;

class PalletValidationImporter extends Importer
{
    protected static ?string $model = PalletValidation::class;

    // public static function canQueue(): bool
    // {
    //     return true; // allows this importer to be queued
    // }

    // public static function getChunkSize(): ?int
    // {
    //     return 1000;
    // }

    public static function getColumns(): array
    {
        return [
            ImportColumn::make('plant')
                ->requiredMapping()
                ->label('Plant Code')
                ->exampleHeader('Plant Code')
                ->example('1000')
                ->relationship(resolveUsing: 'code')
                ->rules(['required']),
            ImportColumn::make('serial_number')
                ->requiredMapping()
                ->label('Serial Number')
                ->exampleHeader('Serial Number')
                ->example('12345678901234')
                ->rules(['required']),
            ImportColumn::make('pallet_number')
                ->requiredMapping()
                ->label('Pallet Number')
                ->exampleHeader('Pallet Number')
                ->example('EP-2507001'),
            ImportColumn::make('pallet_status')
                ->requiredMapping()
                ->label('Pallet Status')
                ->exampleHeader('Pallet Status')
                ->example('Completed'),
            ImportColumn::make('locator_number')
                ->requiredMapping()
                ->label('Locator Number')
                ->exampleHeader('Locator Number')
                ->example('W05-D1B'),
            ImportColumn::make('locator_quantity')
                ->requiredMapping()
                ->label('Locator Quantity')
                ->exampleHeader('Locator Quantity')
                ->example(1)
                ->rules(['required']),
            ImportColumn::make('created_at')
                ->requiredMapping()
                ->label('Created At')
                ->exampleHeader('Created At')
                ->example('01-01-2025 08:00:00')
                ->rules(['required']),
            ImportColumn::make('scanned_at')
                ->requiredMapping()
                ->label('Scanned At')
                ->exampleHeader('Scanned At')
                ->example('01-01-2025 08:00:00')
                ->rules(['required']),
            ImportColumn::make('updated_at')
                ->requiredMapping()
                ->label('Updated At')
                ->exampleHeader('Updated At')
                ->example('01-01-2025 08:00:00')
                ->rules(['required']),
            ImportColumn::make('created_by')
                ->requiredMapping()
                ->label('Created By')
                ->exampleHeader('Created By')
                ->example('Admin')
                ->rules(['required']),
            ImportColumn::make('scanned_by')
                ->requiredMapping()
                ->label('Scanned By')
                ->exampleHeader('Scanned By')
                ->example('Admin')
                ->rules(['required']),
            ImportColumn::make('updated_by')
                ->requiredMapping()
                ->label('Updated By')
                ->exampleHeader('Updated By')
                ->example('Admin'),
        ];
    }

    public function resolveRecord(): ?PalletValidation
    {
        $warnMsg = [];
        $plantCod = $this->data['plant'];
        $plant = null;
        $serialNo = $this->data['serial_number'];
        $palletNo = $this->data['pallet_number'];
        $palletStat = $this->data['pallet_status'];
        $locatorNo = $this->data['locator_number'];
        $locatorQty = $this->data['locator_quantity'];
        $createdAt = $this->data['created_at'];
        $scannedAt = $this->data['scanned_at'];
        $updatedAt = $this->data['updated_at'];
        $cDateTime = null;
        $sDateTime = null;
        $uDateTime = null;
        $createdBy = $this->data['created_by'];
        $scannedBy = $this->data['scanned_by'];
        $updatedBy = $this->data['updated_by'];

        if (Str::length($plantCod) < 4 || ! is_numeric($plantCod) || ! preg_match('/^[1-9]\d{3,}$/', $plantCod)) {
            $warnMsg[] = 'Invalid plant code found';
        } else {
            $plant = Plant::where('code', $plantCod)->first();
            if (! $plant) {
                $warnMsg[] = 'Plant not found';
            } else {
                if (Str::length($serialNo) < 9 || Str::length($serialNo) > 20 || ! ctype_alnum($serialNo)) {
                    $warnMsg[] = 'Invalid serial number found';
                }
                if (Str::length($palletNo) > 0 && Str::length($palletNo) < 10) {
                    $warnMsg[] = 'Invalid pallet number found';
                }
                if (Str::length($palletStat) > 0 && $palletStat != 'Completed') {
                    $warnMsg[] = 'Invalid pallet status found';
                }
                if (Str::length($locatorNo) > 0 && Str::length($locatorNo) < 7) {
                    $warnMsg[] = 'Invalid locator number found';
                }
                if (Str::length($palletNo) <= 0 && Str::length($locatorNo) <= 0) {
                    $warnMsg[] = 'Pallet and locator number found';
                }
                if (Str::length($locatorQty) < 0 || ! is_numeric($locatorQty) || $locatorQty < 0 || $locatorQty > 2) {
                    $warnMsg[] = 'Invalid locator quantity found';
                }
                $created = User::where('name', $createdBy)->first();
                if (! $created) {
                    $warnMsg[] = 'Created by not found';
                }
                $scanned = User::where('name', $scannedBy)->first();
                if (! $scanned) {
                    $warnMsg[] = 'Scanned by not found';
                }
                $updated = User::where('name', $updatedBy)->first();
                if (! $updated) {
                    $warnMsg[] = 'Updated by not found';
                }

                $formats = ['d-m-Y H:i', 'd-m-Y H:i:s']; // '07-05-2025 08:00' or '07-05-2025 08:00:00'

                foreach ($formats as $format) {
                    try {
                        $cDateTime = Carbon::createFromFormat($format, $createdAt);
                        break;
                    } catch (\Exception $e) {
                        // Optionally collect warning messages
                        // $warnMsg[] = "Date format mismatch with format: $format";
                    }
                }

                if (! isset($cDateTime)) {
                    // throw new \Exception('Invalid date time format');
                    $warnMsg[] = "Invalid 'Created DateTime' format. Expected DD-MM-YYYY HH:MM:SS";
                }

                foreach ($formats as $format) {
                    try {
                        $sDateTime = Carbon::createFromFormat($format, $scannedAt);
                        break;
                    } catch (\Exception $e) {
                        // Optionally collect warning messages
                        // $warnMsg[] = "Date format mismatch with format: $format";
                    }
                }

                if (! isset($sDateTime)) {
                    $warnMsg[] = "Invalid 'Scanned DateTime' format. Expected DD-MM-YYYY HH:MM:SS";
                }

                foreach ($formats as $format) {
                    try {
                        $uDateTime = Carbon::createFromFormat($format, $updatedAt);
                        break;
                    } catch (\Exception $e) {
                        // Optionally collect warning messages
                        // $warnMsg[] = "Date format mismatch with format: $format";
                    }
                }

                if (! isset($uDateTime)) {
                    $warnMsg[] = "Invalid 'Updated DateTime' format. Expected DD-MM-YYYY HH:MM:SS";
                } else {
                    if (isset($cDateTime) && isset($uDateTime)) {
                        if ($cDateTime->greaterThan($uDateTime)) {
                            $warnMsg[] = "'Created DataTime' is greater than 'Updated DateTime'.";
                        }
                    }
                }
            }
        }

        // if (!is_numeric($locatorQuantity) || $locatorQuantity < 0 || $locatorQuantity > 2) {
        //     $warnMsg[] = "Invalid locator quantity found";
        // }

        if (! empty($warnMsg)) {
            throw new RowImportFailedException(implode(', ', $warnMsg));
        }

        PalletValidation::updateOrCreate(
            [
                'plant_id' => $plant->id,
                'serial_number' => $serialNo,
            ],
            [
                'pallet_number' => $palletNo,
                'pallet_status' => $palletStat,
                'locator_number' => $locatorNo,
                'locator_quantity' => $locatorQty,
                'created_at' => $cDateTime->format('Y-m-d H:i:s'),
                'scanned_at' => $sDateTime->format('Y-m-d H:i:s'),
                'updated_at' => $uDateTime->format('Y-m-d H:i:s'),
                'created_by' => $createdBy,
                'scanned_by' => $scannedBy,
                'updated_by' => $updatedBy,
            ]
        );

        return null;
        // // return PalletValidation::firstOrNew([
        // //     // Update existing records, matching them by `$this->data['column_name']`
        // //     'email' => $this->data['email'],
        // // ]);

        // return new PalletValidation();
    }

    public static function getCompletedNotificationBody(Import $import): string
    {
        $body = 'Your pallet validation import has completed and '.number_format($import->successful_rows).' '.str('row')->plural($import->successful_rows).' imported.';

        if ($failedRowsCount = $import->getFailedRowsCount()) {
            $body .= ' '.number_format($failedRowsCount).' '.str('row')->plural($failedRowsCount).' failed to import.';
        }

        return $body;
    }
}