<?php

namespace App\Filament\Imports;

use App\Models\Item;
use App\Models\Line;
use App\Models\Plant;
use App\Models\ProcessOrder;
use App\Models\User;
use Filament\Actions\Imports\Exceptions\RowImportFailedException;
use Filament\Actions\Imports\ImportColumn;
use Filament\Actions\Imports\Importer;
use Filament\Actions\Imports\Models\Import;
use Filament\Facades\Filament;
use Str;

class ProcessOrderImporter extends Importer
{
    protected static ?string $model = ProcessOrder::class;

    public static function getColumns(): array
    {
        return [
            ImportColumn::make('plant')
                ->requiredMapping()
                ->exampleHeader('PLANT CODE')
                ->example('1000')
                ->label('PLANT CODE')
                ->relationship(resolveUsing: 'code')
                ->rules(['required']),
            ImportColumn::make('line')
                ->requiredMapping()
                ->exampleHeader('LINE NAME')
                ->example(' Polywrapped line')
                ->label('LINE NAME')
                ->relationship(resolveUsing: 'name'),
            ImportColumn::make('item')
                ->requiredMapping()
                ->exampleHeader('ITEM CODE')
                ->example('123456')
                ->label('ITEM CODE')
                ->relationship(resolveUsing: 'code')
                ->rules(['required']),
            ImportColumn::make('process_order')
                ->exampleHeader('PROCESS ORDER')
                ->example('202500123456')
                ->label('PROCESS ORDER')
                ->rules(['required']),
            ImportColumn::make('coil_number')
                ->exampleHeader('COIL NUMBER')
                ->example('01')
                ->label('COIL NUMBER')
                ->rules(['required']),
            ImportColumn::make('order_quantity')
                ->exampleHeader('ORDER QUANTITY')
                ->example('100')
                ->label('ORDER QUANTITY')
                ->rules(['required']),
            ImportColumn::make('received_quantity')
                ->exampleHeader('RECEIVED QUANTITY')
                ->example('01')
                ->label('RECEIVED QUANTITY')
                ->rules(['required']),
            ImportColumn::make('sfg_number')
                ->exampleHeader('SFG NUMBER')
                ->example('200000220613-72')
                ->label('SFG NUMBER'),
            ImportColumn::make('machine_name')
                ->exampleHeader('MACHINE NAME')
                ->example('WMIWRM13 - 2-L2')
                ->label('MACHINE NAME'),
            ImportColumn::make('scrap_quantity')
                ->exampleHeader('SCRAP QUANTITY')
                ->example('0')
                ->label('SCRAP QUANTITY'),
            ImportColumn::make('rework_status')
                ->exampleHeader('REWORK STATUS')
                ->example('0')
                ->label('REWORK STATUS'),
            ImportColumn::make('created_at')
                ->exampleHeader('CREATED AT')
                ->example('2026-02-20 13:00:00')
                ->label('CREATED AT')
                ->rules(['required']),
            ImportColumn::make('updated_at')
                ->exampleHeader('UPDATED AT')
                ->example('2026-02-20 13:00:00')
                ->label('UPDATED AT'),
            ImportColumn::make('created_by')
                ->exampleHeader('CREATED BY')
                ->example('RAW01234')
                ->label('CREATED BY'),
            ImportColumn::make('updated_by')
                ->exampleHeader('UPDATED BY')
                ->example('RAW01234')
                ->label('UPDATED BY'),
        ];
    }

    public function resolveRecord(): ?ProcessOrder
    {
        $warnMsg = [];
        $plantCod = $this->data['plant'];
        $plant = null;
        $iCode = trim($this->data['item']);
        $lineName = trim($this->data['line']);
        $coilNo = trim($this->data['coil_number'] ?? '');
        $sfgNo = trim($this->data['sfg_number'] ?? '');
        $machineName = trim($this->data['machine_name'] ?? '');
        $scrapQuan = trim($this->data['scrap_quantity'] ?? '');
        $reworkStatus = trim($this->data['rework_status'] ?? '');
        $orderQuan = trim($this->data['order_quantity'] ?? '');
        $recQuan = trim($this->data['received_quantity'] ?? '');
        $processOrder = trim($this->data['process_order'] ?? '');
        $createdAt = trim($this->data['created_at'] ?? '');
        $createdBy = trim($this->data['created_by'] ?? '');
        $updatedAt = trim($this->data['updated_at'] ?? '');
        $updatedBy = trim($this->data['updated_by'] ?? '');
        // $user = Filament::auth()->user();
        // $operatorName = $user->name;

        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';
            }
        }

        if (Str::length($iCode) < 6 || ! ctype_alnum($iCode)) {
            $warnMsg[] = 'Invalid item code found';
        } else {
            $itemCode = Item::where('code', $iCode)->first();
            if (! $itemCode) {
                $warnMsg[] = 'Item Code not found';
            }
        }

        if ($processOrder == '') {
            $warnMsg[] = 'Process Order cannot be empty';
        }

        if($lineName != null && $lineName != ''){
            $lineAgaPlant = Line::where('plant_id', $plant->id)->where('name', $lineName)->first();

            if(! $lineAgaPlant){
                $warnMsg[] = "Line not found against plant code $plantCod";
            }
            else{
                $lineId = $lineAgaPlant->id;
            }
        }

        if($scrapQuan == null || $scrapQuan == ''){
            $scrapQuan = 0;
        }

        // $user = User::where('name', $this->data['created_by'])->first();
        // if (! $user) {
        //     $warnMsg[] = 'User not found';
        // }

        if ($plant && $itemCode && $processOrder != '') {

            $existingOrder = ProcessOrder::where('plant_id', $plant->id)
                ->where('process_order', $processOrder)
                ->first();

            if ($existingOrder && $existingOrder->item_id !== ($itemCode->id ?? null)) {
                $warnMsg[] = 'Same Process Order already exists for this Plant with a different Item Code';
            }
        }

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

        $lineId = null;

        if($lineName != null && $lineName != ''){

            $existingCoil = ProcessOrder::where('plant_id', $plant->id)
                ->where('process_order', $processOrder)
                ->where('line_id', $lineId)
                ->where('coil_number', $coilNo)
                ->first();

            if (! $existingCoil)
            {
                ProcessOrder::Create(
                    [
                        'plant_id' => $plant->id,
                        'line_id' => $lineId,
                        'process_order' => $processOrder,
                        'item_id' => $itemCode->id,
                        'coil_number' => $coilNo,
                        'order_quantity' => $orderQuan,
                        'received_quantity' => $recQuan,
                        'scrap_quantity'    => $scrapQuan,
                        'sfg_number' => $sfgNo,
                        'machine_name' => $machineName,
                        'rework_status' => $reworkStatus,
                        'created_at' => $createdAt,
                        'updated_at' => $updatedAt,
                        'created_by' => $createdBy,
                        'updated_by' => $updatedBy,
                    ]
                );
            }
            else
            {
                ProcessOrder::where('plant_id', $plant->id)
                    ->where('process_order', $processOrder)
                    ->where('line_id', $lineId)
                    ->where('coil_number', $coilNo)
                    ->update([
                        // 'order_quantity'    => $orderQty,
                        'received_quantity' => $recQuan,
                        'scrap_quantity'    => $scrapQuan,
                        // 'sfg_number'        => $sfgNo,
                        // 'machine_name'      => $machineId,
                        'rework_status' => $reworkStatus,
                        'updated_by' => $updatedBy,
                        'updated_at' => $updatedAt,
                    ]);
            }

        }
        else if($lineName == null || $lineName == ''){
            $existing = ProcessOrder::where('plant_id', $plant->id)
                ->where('process_order', $processOrder)
                ->where('coil_number', $coilNo)
                ->first();

            if(!$existing){
                ProcessOrder::Create(
                    [
                        'plant_id' => $plant->id,
                        'line_id' => null,
                        'process_order' => $processOrder,
                        'item_id' => $itemCode->id,
                        'coil_number' => $coilNo,
                        'order_quantity' => $orderQuan,
                        'received_quantity' => $recQuan,
                        'scrap_quantity'    => $scrapQuan ?? 0,
                        'sfg_number' => $sfgNo,
                        'machine_name' => $machineName,
                        'rework_status' => $reworkStatus,
                        'created_at' => $createdAt,
                        'updated_at' => $updatedAt,
                        'created_by' => $createdBy,
                        'updated_by' => $updatedBy,
                    ]
                );
            }
            else
            {
                ProcessOrder::where('plant_id', $plant->id)
                    ->where('process_order', $processOrder)
                    ->where('line_id', $lineId)
                    ->where('coil_number', $coilNo)
                    ->update([
                        // 'order_quantity'    => $orderQty,
                        'received_quantity' => $recQuan,
                        'scrap_quantity'    => $scrapQuan,
                        // 'sfg_number'        => $sfgNo,
                        // 'machine_name'      => $machineId,
                        'rework_status' => $reworkStatus,
                        'updated_by' => $updatedBy,
                        'updated_at' => $updatedAt,
                    ]);
            }
        }

        return null;

        // return new ProcessOrder();
    }

    public static function getCompletedNotificationBody(Import $import): string
    {
        $body = 'Your process order import has completed and '.number_format($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;
    }
}