<?php

namespace App\Filament\User\Resources;

use App\Filament\User\Resources\ProductInventoryResource\Pages;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use App\Models\Product;
use App\Models\ProductSize;
use App\Models\ProductInventory;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\DB;


class ProductInventoryResource extends Resource
{
    protected static ?string $model = ProductInventory::class;

    protected static ?string $navigationIcon = 'heroicon-o-inbox';
    protected static ?string $navigationLabel = 'Inventar';
    protected static ?string $modelLabel = 'Inventar';
    protected static ?string $slug = 'inventar';
    protected static ?string $navigationGroup = 'Lager';

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\Select::make('product_id')
                    ->label('Produkt')
                    ->native(false)
                    ->searchable()
                    ->options(Product::all()->pluck('title', 'id'))
                    ->reactive()
                    ->afterStateUpdated(fn(callable $set) => $set('size_id', null))
                    ->required()
                    ->disabled(fn($record) => !is_null($record)),

                Forms\Components\Select::make('size_id')
                    ->label('Größe')
                    ->native(false)
                    ->options(function (callable $get) {
                        $productId = $get('product_id');
                        if (!$productId) {
                            return [];
                        }
                        return ProductSize::where('product_id', $productId)
                            ->get()
                            ->mapWithKeys(function ($product) {
                                return [$product->id => "{$product->description} ({$product->price}€)"];
                            });
                    })
                    ->required()
                    ->disabled(fn($record) => !is_null($record))
                    ->reactive(),
            Forms\Components\TextInput::make('amount')
                ->label('Mange')
                ->numeric(false)
                ->step(1)
                ->rules(['min:1'])
                ->default(1)
                ->required()

            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('product.title')->label('Produkt'),
                Tables\Columns\TextColumn::make('size')->label('Größe')
                    ->formatStateUsing(fn(ProductInventory $record) => "{$record->size->description} ({$record->size->price}€)"),
                Tables\Columns\TextColumn::make('total')->label('Anzahl'),


            ])
            ->emptyStateHeading('Kein Inventar')
            ->recordUrl(null);
    }

    protected function getTableQuery(): Builder {
        return ProductInventory::select(
            DB::raw('MIN(id) as id'),
            DB::raw('product_id'),
            DB::raw('size_id'),
            DB::raw('count(*) as total')
        )
        ->where()
            ->groupBy('size_id');
    }

    public static function getEloquentQuery(): Builder {
        return parent::getEloquentQuery()
            ->whereNull('out_at')
            ->select(DB::raw('MIN(id) AS id'), DB::raw('MIN(product_id) AS product_id'), 'size_id', DB::raw('COUNT(*) as total'))
            ->groupBy('size_id')
            ->orderBy('product_id');
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListProductInventory::route('/'),
            'create' => Pages\CreateProductInventory::route('/create'),
            'edit' => Pages\EditProductInventory::route('/{record}/edit'),
        ];
    }

    public static function getPluralLabel(): string
    {
        return 'Inventar'; 
    }

}