<?php

namespace App\Filament\Resources;

use App\Filament\Imports\ProductionQuantityImporter;
use App\Filament\Resources\ProductionQuantityResource\Pages;
use App\Filament\Resources\ProductionQuantityResource\RelationManagers;
use App\Models\ProductionQuantity;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Actions\ImportAction;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\SoftDeletingScope;
use Filament\Forms\Components\Section;

class ProductionQuantityResource extends Resource
{
    protected static ?string $model = ProductionQuantity::class;

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

    // protected static ?string $navigationParentItem = 'Display Transactions';

    protected static ?string $navigationGroup = 'Production';

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Section::make('')
                    ->schema([
                        Forms\Components\Select::make('plant_id')
                            ->relationship('plant', 'name')
                            ->required()
                            // ->nullable()
                            ->reactive()
                            // ->afterStateUpdated(fn ($set) => $set('block_name', null))
                            ->afterStateUpdated(function ($state, callable $set, callable $get) {
                                $plantId = $get('plant_id');
                                $set('block_name', null);
                                if (!$plantId) {
                                    $set('pqPlantError', 'Please select a plant first.');
                                    return;
                                }
                                else
                                {
                                    $set('validationError', null);
                                    $set('pqPlantError', null);
                                }
                            })
                            ->extraAttributes(fn ($get) => [
                                'class' => $get('pqPlantError') ? 'border-red-500' : '',
                            ])
                            ->hint(fn ($get) => $get('pqPlantError') ? $get('pqPlantError') : null)
                            ->hintColor('danger'),
                        Forms\Components\Select::make('block_name')
                            ->required()
                            // ->nullable()
                            ->options(function (callable $get) {
                                if (!$get('plant_id')) {
                                    return [];
                                }

                                return \App\Models\Block::where('plant_id', $get('plant_id'))
                                    ->pluck('name', 'id')
                                    ->toArray();
                            })
                            ->reactive()
                            // ->afterStateUpdated(fn ($set) => $set('shift_id', null))
                            ->afterStateUpdated(function ($state, callable $set, callable $get) {
                                $blockId = $get('block_name');
                                $set('shift_id', null);
                                if (!$blockId) {
                                    $set('pqBlockError', 'Please select a block first.');
                                    return;
                                }
                                else
                                {
                                    $set('validationError', null);
                                    $set('pqBlockError', null);
                                }
                            })
                            ->extraAttributes(fn ($get) => [
                                'class' => $get('pqBlockError') ? 'border-red-500' : '',
                            ])
                            ->hint(fn ($get) => $get('pqBlockError') ? $get('pqBlockError') : null)
                            ->hintColor('danger'),
                        Forms\Components\Select::make('shift_id')
                            ->relationship('shift', 'name')
                            ->required()
                            // ->nullable()
                            ->options(function (callable $get) {
                                if (!$get('plant_id') || !$get('block_name')) {
                                    return [];
                                }

                                return \App\Models\Shift::where('plant_id', $get('plant_id'))
                                    ->where('block_id', $get('block_name'))
                                    ->pluck('name', 'id')
                                    ->toArray();
                            })
                            ->reactive()
                            ->afterStateUpdated(fn ($set) => $set('line_id', null))
                            ->afterStateUpdated(function ($state, callable $set, callable $get) {
                                $shiftId = $get('shift_id');
                                $set('line_id', null);
                                if (!$shiftId) {
                                    $set('pqShiftError', 'Please select a shift first.');
                                    return;
                                }
                                else
                                {
                                    $set('validationError', null);
                                    $set('pqShiftError', null);
                                }
                            })
                            ->extraAttributes(fn ($get) => [
                                'class' => $get('pqShiftError') ? 'border-red-500' : '',
                            ])
                            ->hint(fn ($get) => $get('pqShiftError') ? $get('pqShiftError') : null)
                            ->hintColor('danger'),
                        Forms\Components\Select::make('line_id')
                            ->relationship('line', 'name')
                            ->required()
                            // ->nullable()
                            // ->options(fn (callable $get) =>
                            // \App\Models\Line::where('plant_id', $get('plant_id'))
                            //     ->pluck('name', 'id')
                            //     ->toArray() // Convert collection to array
                            // )
                            ->options(function (callable $get) {
                                if (!$get('plant_id') || !$get('block_name') || !$get('shift_id')) {
                                    return [];
                                }

                                return \App\Models\Line::where('plant_id', $get('plant_id'))
                                    ->pluck('name', 'id')
                                    ->toArray();
                            })
                            ->reactive()
                            ->afterStateUpdated(function ($state, callable $set, callable $get) {
                                $lineId = $get('line_id');
                                if (!$lineId) {
                                    $set('ppLineError', 'Please select a line first.');
                                    return;
                                }
                                else
                                {
                                    $set('validationError', null);
                                    $set('ppLineError', null);
                                }
                            })
                            ->extraAttributes(fn ($get) => [
                                'class' => $get('ppLineError') ? 'border-red-500' : '',
                            ])
                            ->hint(fn ($get) => $get('ppLineError') ? $get('ppLineError') : null)
                            ->hintColor('danger'),
                        // Forms\Components\Select::make('item_id')
                        //     ->label('Item Code')
                        //     ->relationship('item', 'code')
                        //     ->required(),
                        // // Forms\Components\TextInput::make('item_code')
                        // //     ->required()
                        // //     ->autocapitalize('item_code'),
                        // //     //->columnSpanFull(),
                        // Virtual field for code input (not stored in DB)
                        Forms\Components\TextInput::make('item_code')
                            ->label('Item Code')
                            // ->required()
                            ->reactive()
                            ->afterStateUpdated(function ($state, callable $get, callable $set) {
                                // **Check if input is empty before processing**
                                if (empty($state)) {
                                    $set('item_id', null);
                                    $set('item_description', null);
                                    $set('serial_number', null);
                                    $set('validationError', null);
                                    return;
                                }
                                else
                                {
                                    if (!$get('plant_id')) {
                                        $set('item_code', null);
                                        $set('item_id', null);
                                        $set('item_description', null);
                                        $set('serial_number', null);
                                        $set('validationError', 'Please select a plant first.');
                                        return;
                                    }
                                    else if (!$get('block_name')) {
                                        $set('item_code', null);
                                        $set('item_id', null);
                                        $set('item_description', null);
                                        $set('serial_number', null);
                                        $set('validationError', 'Please select a block first.');
                                        return;
                                    }
                                    else if (!$get('shift_id')) {
                                        $set('item_code', null);
                                        $set('item_id', null);
                                        $set('item_description', null);
                                        $set('serial_number', null);
                                        $set('validationError', 'Please select a shift first.');
                                        return;
                                    }
                                    else if (!$get('line_id')) {
                                        $set('item_code', null);
                                        $set('item_id', null);
                                        $set('item_description', null);
                                        $set('serial_number', null);
                                        $set('validationError', 'Please select a line first.');
                                        return;
                                    }
                                    $set('validationError', null);
                                }

                                if (!preg_match('/^[a-zA-Z0-9]+\|[a-zA-Z0-9]+(\|)?$/', $state)) {
                                    $set('validationError', 'Scan valid QR code. (Ex: Item_Code|Serial_Number )');
                                    $set('item_id', null);
                                    $set('item_description', null);
                                    $set('serial_number', null);
                                    return;
                                }

                                // Only search when all parent IDs are selected
                                $parts = explode('|', $state);

                                $itemCode = trim($parts[0]); // Extract item code // 123456|123456789

                                $serialNumber = isset($parts[1]) ? trim($parts[1]) : null;

                                if (strlen($itemCode) < 6) {
                                    $set('validationError', 'Item code must be at least 6 digits.');
                                    $set('item_id', null);
                                    $set('item_description', null);
                                    $set('serial_number', null);
                                    return;
                                }
                                else if (!ctype_alnum($itemCode)) {
                                    $set('validationError', 'Item code should contain alpha-numeric values.');
                                    $set('item_id', null);
                                    $set('item_description', null);
                                    $set('serial_number', null);
                                    return;
                                }
                                else if ($serialNumber === '') {
                                    $set('validationError', 'Waiting for full QR scan...');
                                    $set('item_description', null);
                                    $set('serial_number', null);
                                    return; // Do not clear item_id, just wait for full input
                                }
                                else if (strlen($serialNumber) < 9) {
                                    $set('validationError', 'Serial Number must be at least 9 digits.');
                                    $set('item_description', null);
                                    $set('serial_number', null);
                                    return;
                                }
                                else if (!ctype_alnum($serialNumber)) {
                                    $set('validationError', 'Serial Number should contain alpha-numeric values.');
                                    $set('item_id', null);
                                    $set('item_description', null);
                                    $set('serial_number', null);
                                    return;
                                }
                                else
                                {
                                    $set('validationError', null);
                                }

                                // Fetch item using item code and plant_id
                                $item = \App\Models\Item::where('code', $itemCode)
                                    ->where('plant_id', $get('plant_id'))
                                    ->first();

                                if ($item)
                                {
                                    $sNo = ProductionQuantity::where('serial_number', $serialNumber)
                                        // ->where('plant_id', $get('plant_id'))
                                    ->exists();
                                    if (!$sNo)
                                    {
                                        $set('serial_number', $serialNumber);
                                        $set('item_id', $item->id);
                                        $set('item_code', $itemCode); //$itemCode
                                        $set('item_description', $item->description);
                                    }
                                    else
                                    {
                                        $set('validationError', 'Serial number already exist in database.');
                                        $set('item_id', null);
                                        $set('item_description', null);
                                        $set('serial_number', null);
                                        return;
                                    }
                                }
                                else
                                {
                                    $set('validationError', 'Item code does not exist in master data.');
                                    $set('item_id', null);
                                    $set('item_description', null);
                                    $set('serial_number', null);
                                    return;
                                }
                            })
                            ->extraAttributes(fn ($get) => [
                                'class' => $get('validationError') ? 'border-red-500' : '',
                            ])
                            ->hint(fn ($get) => $get('validationError') ? $get('validationError') : null)
                            ->hintColor('danger'),
                        Forms\Components\Hidden::make('item_id')
                            ->required(),
                        Forms\Components\TextInput::make('item_description')
                            ->label('Description')
                            ->reactive()
                            ->readOnly(true)
                            ->required(),
                        // Forms\Components\Select::make('item_id')
                        //     ->label('Description')
                        //     ->relationship('item', 'description')
                        //     ->required(),
                        Forms\Components\TextInput::make('serial_number')
                            ->required()
                            ->unique(ignoreRecord: true)
                            ->readOnly(true)
                            ->autocapitalize('serial_number'),
                            //->columnSpanFull(),
                    ])
                    ->columns(2),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('id')
                    ->label('ID')
                    ->numeric()
                    ->sortable(),
                Tables\Columns\TextColumn::make('item.code')
                    ->sortable(),
                Tables\Columns\TextColumn::make('serial_number')
                    ->sortable(),
                Tables\Columns\TextColumn::make('line.name')
                    ->sortable(),
                Tables\Columns\TextColumn::make('shift.name')
                    ->sortable(),
                Tables\Columns\TextColumn::make('plant.name')
                    ->sortable(),
                Tables\Columns\TextColumn::make('created_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
                Tables\Columns\TextColumn::make('updated_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
                Tables\Columns\TextColumn::make('deleted_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(),
                ]),
            ])
            ->headerActions([
                ImportAction::make()
                ->importer(ProductionQuantityImporter::class),
            ]);
    }

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

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListProductionQuantities::route('/'),
            'create' => Pages\CreateProductionQuantity::route('/create'),
            'view' => Pages\ViewProductionQuantity::route('/{record}'),
            'edit' => Pages\EditProductionQuantity::route('/{record}/edit'),
        ];
    }

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