<?php

namespace App\Filament\Resources;

use App\Filament\Resources\OcrValidationResource\Pages;
use App\Filament\Resources\OcrValidationResource\RelationManagers;
use App\Models\Item;
use App\Models\OcrValidation;
use App\Models\Plant;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\SoftDeletingScope;
use thiagoalessio\TesseractOCR\TesseractOCR;
use setasign\Fpdi\Fpdi;
use Filament\Facades\Filament;
use Filament\Forms\Components\Actions\Action;
use Filament\Notifications\Notification;
use Livewire\Features\SupportFileUploads\TemporaryUploadedFile;
use setasign\Fpdi\PdfReader;
use SimpleSoftwareIO\QrCode\Facades\QrCode;
use Storage;
use Filament\Forms\Concerns\InteractsWithForms;
use Smalot\PdfParser\Parser;

class OcrValidationResource extends Resource
{
    protected static ?string $model = OcrValidation::class;

    protected static ?string $navigationIcon = 'heroicon-o-rectangle-stack';

    public $camera_capture;
    public $serialNumbers = [];


    // protected $listeners = [
    //     'set-serial-numbers' => 'fillSerialNumbers'
    // ];

    use InteractsWithForms;

    // public function fillSerialNumbers($event)
    // {
    //     $serialNumbers = $event['serialNumbers'] ?? [];

    //     $this->form->fill([
    //         'serial_1' => $serialNumbers[0] ?? null,
    //         'serial_2' => $serialNumbers[1] ?? null,
    //         'serial_3' => $serialNumbers[2] ?? null,
    //         'serial_4' => $serialNumbers[3] ?? null,
    //     ]);
    // }

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\Select::make('plant_id')
                    ->label('Plant')
                    ->reactive()
                    ->relationship('plant', 'name')
                    ->options(function (callable $get) {
                        $userHas = Filament::auth()->user()->plant_id;
                        return ($userHas && strlen($userHas) > 0) ? Plant::where('id', $userHas)->pluck('name', 'id')->toArray() : Plant::pluck('name', 'id')->toArray();
                    })
                    ->required(),
                Forms\Components\Select::make('item_id')
                     ->label('Item Code')
                    //->relationship('item', 'id')
                    ->reactive()
                    ->searchable()
                    ->options(function (callable $get) {
                        $plantId = $get('plant_id');
                        if (empty($plantId)) {
                            return [];
                        }
                        return Item::where('plant_id', $plantId)->pluck('code', 'id');
                    })
                    ->required(),
                Forms\Components\TextInput::make('gr_number')
                    ->label('GR Number')
                    ->minLength(7)
                    ->required(),
                // Forms\Components\FileUpload::make('photo')
                //     ->dehydrated(false)
                //     ->label('Capture from Webcam')
                //     ->disk('local')
                //     ->directory('uploads')
                //     ->preserveFilenames()
                //     ->image()
                //     ->helperText('You can take a picture from your webcam')
                //     ->reactive(),

                // Forms\Components\TextInput::make('camera_capture')
                //     ->label('Captured Photo')
                //     ->hidden()
                //     ->extraAttributes([
                //         'x-ref' => 'hiddenInput', // so Alpine can target it
                //     ]),

                // Forms\Components\TextInput::make('camera_capture_file')
                //     ->label('Captured Photo')
                //     ->reactive()
                //     ->hidden()
                //     ->extraAttributes([
                //         'x-ref' => 'hiddenInput', // so Alpine can reference it
                //     ]),
                Forms\Components\Hidden::make('camera_capture_file')
                    ->label('Captured File')
                    ->default(null)
                    ->reactive(),
                // Forms\Components\Hidden::make('serialNumbers')
                //     ->default('[]') // empty array as default
                //     ->dehydrated(),
                Forms\Components\Hidden::make('serial_numbers')
                    ->default('[]'),
                Forms\Components\FileUpload::make('attachment')
                    ->label('PDF Upload')
                    ->acceptedFileTypes(['application/pdf'])
                    ->storeFiles(false)
                    ->disk('local')
                    ->directory('uploads/temp')
                    ->preserveFilenames()
                    ->reactive(),

                Forms\Components\Actions::make([
                        Action::make('uploadNow')
                        ->label('Upload PDF Now')
                        ->action(function ($get, callable $set) {
                            $uploadedFiles = $get('attachment');

                            if (is_array($uploadedFiles) && count($uploadedFiles) > 0)
                            {
                                $uploaded = reset($uploadedFiles);

                                if ($uploaded instanceof TemporaryUploadedFile) {
                                    $grNumber = $get('gr_number');
                                    $safeName = preg_replace('/[^A-Za-z0-9_\-]/', '_', $grNumber);
                                    // $originalName = $uploaded->getClientOriginalName();
                                    // $path = 'uploads/GRNumber/' . $originalName;
                                    $finalFileName = $safeName . '.pdf';
                                    $finalPath = 'uploads/OcrGRNumber/' . $finalFileName;

                                    if (Storage::disk('local')->exists($finalPath)) {
                                        Notification::make()
                                            ->title('Duplicate File')
                                            ->body("The file '{$finalFileName}' already exists in uploads/GRNumber.")
                                            ->warning()
                                            ->send();
                                        return;
                                    }

                                    $storedPath = $uploaded->storeAs(
                                        'uploads/OcrGRNumber',
                                        $finalFileName,
                                        'local'
                                    );


                                   // $fullPath = storage_path('app/' . $storedPath);
                                    $fullPath = storage_path('app/private/' . $storedPath);
                                    $parser = new Parser();
                                    //$pdf = $parser->parseContent(file_get_contents($uploaded->getRealPath()));
                                    $pdf = $parser->parseFile($fullPath);
                                    $text = $pdf->getText();

                                   // dd($text);

                                    //dd($text);
                                    $item1 = null;
                                    $item2 = null;

                                    if (preg_match('/Item code\s*:\s*(\S+)/i', $text, $matches))
                                    {
                                        $item1 = $matches[1];
                                    }
                                    else if (preg_match('/E CODE\s*:\s*(\S+)/i', $text, $matches))
                                    {
                                        $item2 = $matches[1];
                                    }

                                    $processOrder = $get('gr_number');

                                    $itemId = $get('item_id');

                                    $plant = $get('plant_id');

                                    $item = Item::find($itemId);

                                    $plant = Plant::find($plant);

                                    if ($item)
                                    {
                                        $itemCode = $item->code;
                                    }
                                    else
                                    {
                                        $itemCode = null;
                                        Notification::make()
                                            ->title('Item Not Found')
                                            ->body("Item not found in uploaded pdf.")
                                            ->warning()
                                            ->send();
                                        if (Storage::disk('local')->exists($storedPath)) {
                                            Storage::disk('local')->delete($storedPath);
                                        }
                                        return;
                                    }

                                    $storedPath = $uploaded->storeAs(
                                        'uploads/OcrGRNumber',
                                        $finalFileName,
                                        'local'
                                    );

                                    if($itemCode == $item1)
                                    {
                                        Notification::make()
                                        ->title('Success')
                                        ->body("Gr Number '$processOrder' PDF uploaded successfully.")
                                        ->success()
                                        ->send();
                                        return;
                                    }
                                    if($itemCode == $item2)
                                    {
                                        Notification::make()
                                        ->title('Success')
                                        ->body("Gr Number '$processOrder' PDF uploaded successfully.")
                                        ->success()
                                        ->send();
                                        return;
                                    }
                                    else
                                    {
                                        Notification::make()
                                        ->title('Item Code not matched')
                                        ->body("Item Code: {$item->code} not matched with the uploaded pdf code $item1.")
                                        ->danger()
                                        ->send();

                                        if (Storage::disk('local')->exists($storedPath)) {
                                            Storage::disk('local')->delete($storedPath);
                                        }
                                        return;
                                    }
                                }
                            }
                            else
                            {
                                Notification::make()
                                    ->title('No file selected to upload')
                                    ->warning()
                                    ->send();
                                    return;
                            }
                        }),

                        Action::make('uploadNow1')
                        ->label('Upload OCR')
                        ->action(function ($get, callable $set) {

                            $serials = session('serial_numbers');

                            $grNumber = $get('gr_number');

                            $set('serial_numbers', $serials);

                            if (empty($serials)) {
                                Notification::make()
                                    ->title('Serial numbers cannot be empty!')
                                    ->danger()
                                    ->send();
                                return;
                            }

                            //$serialNumbers = array_slice($serialNumbers, 0, 4);

                            if (count($serials) == 1)
                            {
                                $serialNumbers = $serials;

                                //$templatePath = storage_path('app/private/uploads/StickerTemplateOcr/Single.pdf');
                                $templatePath = storage_path('var/www/app/private/uploads/OcrGrNumber/' . $grNumber . '.pdf');

                                dd(
                                    $templatePath,
                                    file_exists($templatePath),
                                    scandir(storage_path("app/private/uploads/"))
                                );

                                if(!file_exists($templatePath))
                                {
                                    Notification::make()
                                        ->title("Template PDF not found for the Gr Number $grNumber.")
                                        ->danger()
                                        ->send();
                                    return;
                                }

                                $outputPath = storage_path('app/private/uploads/StickerTemplateOcr/single_filled.pdf');

                                $pdf = new Fpdi('P', 'mm', [90, 90]);

                                $templateId = $pdf->setSourceFile($templatePath);
                                $templatePage = $pdf->importPage(1);

                                $pdf->AddPage();
                                $pdf->useTemplate($templatePage, 0, 0, 90, 90);

                                $pdf->SetFont('Helvetica', '', 10);
                                $pdf->SetTextColor(0, 0, 0);

                                $slots = [
                                    ['x' => 19,  'y' => 37.9, 'w' => 46.5, 'h' => 3.5],  // 1st serial
                                ];

                                $qrSlots = [
                                    ['x' => 67.6,  'y' => 39, 'size' => 11.4],
                                ];

                                foreach ($serialNumbers as $i => $serial) {
                                    if (!isset($slots[$i]) || !isset($qrSlots[$i])) continue;

                                    // Erase old QR completely (slightly larger)
                                    $pdf->SetFillColor(255, 255, 255);
                                    $pdf->Rect($qrSlots[$i]['x']-1, $qrSlots[$i]['y']-1, $qrSlots[$i]['size']+2, $qrSlots[$i]['size']+2, 'F');

                                    // Generate new QR code
                                    $qrPath = storage_path("app/private/uploads/QR/qr_$serial.png");
                                    $qrDir = storage_path('app/private/uploads/QR');
                                    if (!file_exists($qrDir)) mkdir($qrDir, 0777, true);
                                    //QrCode::format('svg')->size(100)->generate($serial, $qrPath);
                                    QrCode::format('png')->size(300)->errorCorrection('H')->generate($serial, $qrPath);

                                    // Place QR code
                                    $pdf->Image($qrPath, $qrSlots[$i]['x'], $qrSlots[$i]['y'], $qrSlots[$i]['size'], $qrSlots[$i]['size']);

                                    // Erase old serial
                                    $pdf->SetFillColor(255, 255, 255);
                                    $pdf->Rect($slots[$i]['x'], $slots[$i]['y'], $slots[$i]['w'], $slots[$i]['h'], 'F');

                                    // Write new serial
                                    $pdf->SetXY($slots[$i]['x'], $slots[$i]['y']);
                                    $pdf->Cell($slots[$i]['w'], $slots[$i]['h'], $serial, 0, 0, 'L');
                                }

                                // Save the final PDF
                                $pdf->Output('F', $outputPath);

                                // Download
                                return response()->download($outputPath);
                            }
                            if(count($serials) == 4)
                            {

                                $serialNumbers = array_slice($serials, 0, 4);

                                //dd($serialNumbers);

                                $itemId = $get('item_id');

                                $plant = $get('plant_id');

                                $item = Item::find($itemId);

                                $plant = Plant::find($plant);

                               // $templatePath = storage_path('app/private/uploads/StickerTemplateOcr/multi.pdf');

                                $templatePath = storage_path("app/private/uploads/OcrGrNumber/'$grNumber'.pdf");

                                if(!file_exists($templatePath))
                                {
                                    Notification::make()
                                        ->title("Template PDF not found for the Gr Number $grNumber.")
                                        ->danger()
                                        ->send();
                                    return;
                                }

                                $outputPath = storage_path('app/private/uploads/StickerTemplateOcr/multi_filled.pdf');

                                // $storedPath = $uploaded->storeAs(
                                //     'uploads/GRNumber',
                                //     $finalFileName,
                                //     'local'
                                // );

                                $pdf = new Fpdi('P', 'mm', [90, 90]);

                                $templateId = $pdf->setSourceFile($templatePath);
                                $templatePage = $pdf->importPage(1);

                                $pdf->AddPage();
                                $pdf->useTemplate($templatePage, 0, 0, 90, 90);

                                $pdf->SetFont('Helvetica', '', 10);
                                $pdf->SetTextColor(0, 0, 0);

                                $slots = [
                                    ['x' => 5.7,  'y' => 41.9, 'w' => 46.5, 'h' => 3.5],  // 1st serial
                                    ['x' => 50,   'y' => 41.5, 'w' => 46.6, 'h' => 3.9],  // 2nd serial
                                    ['x' => 5.7,  'y' => 60, 'w' => 46.5, 'h' => 3.5],  // 3rd serial
                                    ['x' => 50,   'y' => 60, 'w' => 46.6, 'h' => 3.5],  // 4rd serial
                                ];

                                $qrSlots = [
                                    ['x' => 17.3,  'y' => 29.2, 'size' => 11.4],
                                    ['x' => 61.5,   'y' => 29, 'size' => 11.5],
                                    ['x' => 17.7,  'y' => 46.7, 'size' => 11.4],
                                    ['x' => 61.7,   'y' => 46.7, 'size' => 11.4],
                                ];

                                foreach ($serialNumbers as $i => $serial) {
                                    if (!isset($slots[$i]) || !isset($qrSlots[$i])) continue;

                                    // Erase old QR completely (slightly larger)
                                    $pdf->SetFillColor(255, 255, 255);
                                    $pdf->Rect($qrSlots[$i]['x']-1, $qrSlots[$i]['y']-1, $qrSlots[$i]['size']+2, $qrSlots[$i]['size']+2, 'F');

                                    // Generate new QR code
                                    $qrPath = storage_path("app/private/uploads/QR/qr_$serial.png");
                                    $qrDir = storage_path('app/private/uploads/QR');
                                    if (!file_exists($qrDir)) mkdir($qrDir, 0777, true);
                                    //QrCode::format('svg')->size(100)->generate($serial, $qrPath);
                                    QrCode::format('png')->size(300)->errorCorrection('H')->generate($serial, $qrPath);

                                    // Place QR code
                                    $pdf->Image($qrPath, $qrSlots[$i]['x'], $qrSlots[$i]['y'], $qrSlots[$i]['size'], $qrSlots[$i]['size']);

                                    // Erase old serial
                                    $pdf->SetFillColor(255, 255, 255);
                                    $pdf->Rect($slots[$i]['x'], $slots[$i]['y'], $slots[$i]['w'], $slots[$i]['h'], 'F');

                                    // Write new serial
                                    $pdf->SetXY($slots[$i]['x'], $slots[$i]['y']);
                                    $pdf->Cell($slots[$i]['w'], $slots[$i]['h'], $serial, 0, 0, 'L');
                                }

                                // Save the final PDF
                                $pdf->Output('F', $outputPath);

                                // Download
                                return response()->download($outputPath);
                            }
                            else
                            {
                                Notification::make()
                                    ->title('Please capture either 1 or 4 serial numbers.')
                                    ->danger()
                                    ->send();
                                return;
                            }
                        }),
                    Action::make('downloadAttachment')
                        ->label('Download PDF')
                        ->action(function ($get) {
                            $equipmentNumber = $get('gr_number');

                            if (!$equipmentNumber) {
                                Notification::make()
                                    ->title('No GR Number entered')
                                    ->danger()
                                    ->send();
                                return;
                            }

                            $files = Storage::disk('local')->files('uploads/GRNumber');

                            $fileToDownload = null;
                            foreach ($files as $file) {
                                if (str_contains($file, $equipmentNumber)) {
                                    $fileToDownload = $file;
                                    break;
                                }
                            }

                            if (!$fileToDownload) {
                                Notification::make()
                                    ->title('PDF not found for this process order')
                                    ->danger()
                                    ->send();
                                return;
                            }

                            return response()->download(Storage::disk('local')->path($fileToDownload));
                        }),
                    ]),
                Forms\Components\Field::make('camera_capture')
                    ->view('fields.camera-capture'),
                Forms\Components\Hidden::make('created_by')
                    ->label('Created By')
                    ->default(Filament::auth()->user()?->name),
                Forms\Components\Hidden::make('updated_by')
                    ->default(Filament::auth()->user()?->name),
            ]);
    }


    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('id')
                    ->label('ID')
                    ->numeric()
                    ->sortable(),
                Tables\Columns\TextColumn::make('plant.name')
                    ->numeric()
                    ->sortable(),
                Tables\Columns\TextColumn::make('item.id')
                    ->numeric()
                    ->sortable(),
                Tables\Columns\TextColumn::make('created_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
                Tables\Columns\TextColumn::make('updated_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->filters([
                Tables\Filters\TrashedFilter::make(),
            ])
            ->actions([
                Tables\Actions\ViewAction::make(),
                Tables\Actions\EditAction::make(),
            ])
            ->bulkActions([
                Tables\Actions\BulkActionGroup::make([
                    Tables\Actions\DeleteBulkAction::make(),
                    Tables\Actions\ForceDeleteBulkAction::make(),
                    Tables\Actions\RestoreBulkAction::make(),
                ]),
            ]);
    }

    public static function getRelations(): array
    {
        return [
            //
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListOcrValidations::route('/'),
            'create' => Pages\CreateOcrValidation::route('/create'),
            'view' => Pages\ViewOcrValidation::route('/{record}'),
            'edit' => Pages\EditOcrValidation::route('/{record}/edit'),
        ];
    }

    public static function getEloquentQuery(): Builder
    {
        return parent::getEloquentQuery()
            ->withoutGlobalScopes([
                SoftDeletingScope::class,
            ]);
    }
}