<?php

namespace App\Filament\Pages;

use App\Models\Producer;
use App\Models\Product;
use App\Models\ProductGroup;
use App\Models\Supplier;
use Filament\Forms\Components\Select;
use Filament\Forms\Concerns\InteractsWithForms;
use Filament\Forms\Contracts\HasForms;
use Filament\Schemas\Components\Utilities\Get;
use Filament\Schemas\Schema;
use Filament\Pages\Page;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\DB;

class CurrentPrice extends Page implements HasForms
{
    use InteractsWithForms;

    protected static string | \BackedEnum | null $navigationIcon = 'heroicon-o-currency-dollar';

    protected static ?string $title = 'Aktuális ár';

    protected static ?string $navigationLabel = 'Aktuális ár';

    protected static string | \UnitEnum | null $navigationGroup = 'Statisztika';

    public function getHeading(): string|\Illuminate\Contracts\Support\Htmlable
    {
        return '';
    }

    public function getBreadcrumbs(): array
    {
        return [];
    }

    protected string $view = 'filament.pages.current-price';

    public ?array $data = [];

    public function mount(): void
    {
        $this->form->fill();
    }

    public function form(Schema $form): Schema
    {
        return $form
            ->schema([
                Select::make('supplier')
                    ->label('Beszállító:')
                    ->options(function (Get $get) {
                        $selectedIds = $this->data['supplier'] ?? [];
                        $query = Supplier::query();

                        $productQuery = $this->buildProductQuery($get, exclude: 'supplier');
                        if ($productQuery) {
                            $query->where(function ($q) use ($productQuery, $selectedIds) {
                                $q->whereIn('id', (clone $productQuery)->whereNotNull('supplier_id')->distinct()->pluck('supplier_id'))
                                    ->orWhereIn('id', $selectedIds);
                            });
                        }

                        return $query->orderBy('name')->pluck('name', 'id');
                    })
                    ->multiple()
                    ->searchable()
                    ->live()
                    ->placeholder('Válasszon beszállítót...'),
                Select::make('productGroup')
                    ->label('Termékcsoport:')
                    ->options(function (Get $get) {
                        $selectedIds = $this->data['productGroup'] ?? [];
                        $query = ProductGroup::query();

                        $productQuery = $this->buildProductQuery($get, exclude: 'productGroup');
                        if ($productQuery) {
                            $query->where(function ($q) use ($productQuery, $selectedIds) {
                                $q->whereIn('id', (clone $productQuery)->whereNotNull('product_group_id')->distinct()->pluck('product_group_id'))
                                    ->orWhereIn('id', $selectedIds);
                            });
                        }

                        return $query->orderBy('name')->pluck('name', 'id');
                    })
                    ->multiple()
                    ->searchable()
                    ->live()
                    ->placeholder('Válasszon termékcsoportot...'),
                Select::make('product')
                    ->label('Termék:')
                    ->multiple()
                    ->searchable()
                    ->live()
                    ->getSearchResultsUsing(function (string $search, Get $get) {
                        $query = $this->buildProductQuery($get, exclude: 'product') ?? Product::query();
                        $query->where('name', 'like', "%{$search}%");

                        return $query->limit(50)->pluck('name', 'name')->toArray();
                    })
                    ->getOptionLabelsUsing(fn (array $values): array => Product::whereIn('name', $values)
                        ->pluck('name', 'name')
                        ->toArray())
                    ->placeholder('Válasszon terméket...'),
                Select::make('hooreycaName')
                    ->label('Hooreyca megnevezés :')
                    ->options(function (Get $get) {
                        $selected = $this->data['hooreycaName'] ?? [];

                        DB::statement("SET sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));");
                        $query = ($this->buildProductQuery($get, exclude: 'hooreycaName') ?? Product::query())
                            ->where('buyerProductName', '!=', '');
                        $options = $query->orderBy('buyerProductName')
                            ->groupBy('buyerProductName')
                            ->pluck('buyerProductName', 'buyerProductName')
                            ->toArray();
                        DB::statement("SET sql_mode=(SELECT CONCAT(@@sql_mode, ',ONLY_FULL_GROUP_BY'));");

                        foreach ($selected as $name) {
                            if (filled($name) && ! array_key_exists($name, $options)) {
                                $options[$name] = $name;
                            }
                        }

                        return $options;
                    })
                    ->multiple()
                    ->searchable()
                    ->live()
                    ->placeholder('Válasszon megnevezést...'),
                Select::make('producer')
                    ->label('Gyártó :')
                    ->options(function (Get $get) {
                        $selectedIds = $this->data['producer'] ?? [];
                        $query = Producer::query();

                        $productQuery = $this->buildProductQuery($get, exclude: 'producer');
                        if ($productQuery) {
                            $query->where(function ($q) use ($productQuery, $selectedIds) {
                                $q->whereIn('id', (clone $productQuery)->whereNotNull('producer_id')->distinct()->pluck('producer_id'))
                                    ->orWhereIn('id', $selectedIds);
                            });
                        }

                        return $query->orderBy('name')->pluck('name', 'id');
                    })
                    ->multiple()
                    ->searchable()
                    ->live()
                    ->placeholder('Válasszon gyártót...'),
            ])
            ->statePath('data');
    }

    public function submit(): void
    {
        $data = $this->form->getState();
        // Itt lehet majd feldolgozni a szűrést
        // dd($data);
    }

    /**
     * Product query szűrve a szűrő űrlap összes mezőjének aktuális állapota alapján,
     * a $exclude-ban megadott mező kihagyásával (kölcsönös/kereszt-szűréshez).
     * Null-t ad vissza, ha egyik mező sincs kitöltve (nincs mit szűrni).
     */
    private function buildProductQuery(Get $get, string $exclude): ?Builder
    {
        $supplierIds = $exclude === 'supplier' ? [] : ($get('supplier') ?? []);
        $productGroupIds = $exclude === 'productGroup' ? [] : ($get('productGroup') ?? []);
        $producerIds = $exclude === 'producer' ? [] : ($get('producer') ?? []);
        $productNames = $exclude === 'product' ? [] : ($get('product') ?? []);
        $hooreycaNames = $exclude === 'hooreycaName' ? [] : ($get('hooreycaName') ?? []);

        if (blank($supplierIds) && blank($productGroupIds) && blank($producerIds) && blank($productNames) && blank($hooreycaNames)) {
            return null;
        }

        $query = Product::query();

        if (filled($supplierIds)) {
            $query->whereIn('supplier_id', $supplierIds);
        }

        if (filled($productGroupIds)) {
            $query->whereIn('product_group_id', $productGroupIds);
        }

        if (filled($producerIds)) {
            $query->whereIn('producer_id', $producerIds);
        }

        if (filled($productNames)) {
            $query->whereIn('name', $productNames);
        }

        if (filled($hooreycaNames)) {
            $query->whereIn('buyerProductName', $hooreycaNames);
        }

        return $query;
    }
}