<?php

namespace App\Filament\Pages;

use App\Models\ProfitCenter;
use App\Models\ProfitCenterSupplierCode;
use App\Models\Supplier;
use Filament\Actions\Action;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Toggle;
use Filament\Forms\Concerns\InteractsWithForms;
use Filament\Forms\Contracts\HasForms;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use Filament\Schemas\Components\Grid;
use Filament\Schemas\Components\Section;
use Filament\Schemas\Components\Utilities\Get;
use Filament\Schemas\Components\Utilities\Set;
use Filament\Schemas\Schema;
use Laravel\Pennant\Feature;

class SupplierCustomerCodes extends Page implements HasForms
{
    use InteractsWithForms;

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

    protected string $view = 'filament.pages.supplier-customer-codes';

    protected static ?string $title = 'Beszállítói vevőkódok';

    protected static ?string $navigationLabel = 'Beszállítói vevőkódok';

    protected static bool $shouldRegisterNavigation = false;

    public ?array $data = [];

    /**
     * Rollout-védelem: a SupplierCustomerCode Pennant flag alapján dől el, ki éri el ezt
     * az oldalt - a topbar menüpont is ezt hívja (ld. speed-button-nav-bar.blade.php).
     */
    public static function canAccess(): bool
    {
        if (! $user = auth()->user()) {
            return false;
        }

        return Feature::for($user)->active('SupplierCustomerCode');
    }

    public function mount(): void
    {
        abort_unless(static::canAccess(), 403);

        $this->form->fill();
    }

    public function form(Schema $form): Schema
    {
        return $form
            ->schema([
                Grid::make(2)
                    ->schema([
                        Select::make('supplier_id')
                            ->label('Beszállító')
                            ->options(Supplier::query()->orderBy('name')->pluck('name', 'id'))
                            ->required()
                            ->searchable()
                            ->live()
                            ->afterStateUpdated(fn (?string $state, Set $set) => $this->loadSupplierData($state, $set)),
                        TextInput::make('search')
                            ->label('Profitcenter keresése')
                            ->placeholder('Kezdjen el gépelni a szűküléshez...')
                            ->live(debounce: 300)
                            ->visible(fn (Get $get) => filled($get('supplier_id'))),
                    ]),
                Toggle::make('hasCustomerCode')
                    ->label('Vevőkód funkció aktív ennél a beszállítónál')
                    ->visible(fn (Get $get) => filled($get('supplier_id'))),
                Section::make('Profitcenterenkénti vevőkód')
                    ->visible(fn (Get $get) => filled($get('supplier_id')))
                    ->columns(3)
                    ->schema(fn (Get $get) => $this->profitCenterCodeFields($get('search'))),
            ])
            ->statePath('data');
    }

    /**
     * @return array<int, TextInput>
     */
    private function profitCenterCodeFields(?string $search = null): array
    {
        return ProfitCenter::query()
            ->when(filled($search), fn ($query) => $query->where('name', 'like', '%'.$search.'%'))
            ->orderBy('name')
            ->get()
            ->map(fn (ProfitCenter $profitCenter) => TextInput::make("codes.{$profitCenter->id}")
                ->label($profitCenter->name)
                ->inlineLabel()
                ->maxLength(255))
            ->all();
    }

    private function loadSupplierData(?string $supplierId, Set $set): void
    {
        $codes = [];

        if ($supplierId) {
            $supplier = Supplier::find($supplierId);
            $set('hasCustomerCode', (bool) $supplier?->hasCustomerCode);

            $codes = ProfitCenterSupplierCode::query()
                ->where('supplier_id', $supplierId)
                ->pluck('customerCode', 'profit_center_id')
                ->all();
        } else {
            $set('hasCustomerCode', false);
        }

        foreach (ProfitCenter::query()->pluck('id') as $profitCenterId) {
            $set("codes.{$profitCenterId}", $codes[$profitCenterId] ?? null);
        }
    }

    protected function getFormActions(): array
    {
        return [
            Action::make('save')
                ->label('Mentés')
                ->submit('save')
                ->color('primary'),
        ];
    }

    public function save(): void
    {
        $state = $this->form->getState();
        $supplierId = $state['supplier_id'];

        Supplier::whereKey($supplierId)->update([
            'hasCustomerCode' => (bool) ($state['hasCustomerCode'] ?? false),
        ]);

        // A form aktuális szűrés (keresés) miatt csak a látható mezőket adná vissza a getState() -
        // a $this->data-ban viszont minden profitcenter kódja benne marad, mert a loadSupplierData()
        // mindegyiket explicit beállítja, függetlenül attól, hogy éppen renderelve van-e.
        foreach ($this->data['codes'] ?? [] as $profitCenterId => $customerCode) {
            $customerCode = is_string($customerCode) ? trim($customerCode) : $customerCode;

            if (blank($customerCode)) {
                ProfitCenterSupplierCode::query()
                    ->where('supplier_id', $supplierId)
                    ->where('profit_center_id', $profitCenterId)
                    ->delete();

                continue;
            }

            ProfitCenterSupplierCode::updateOrCreate(
                ['supplier_id' => $supplierId, 'profit_center_id' => $profitCenterId],
                ['customerCode' => $customerCode],
            );
        }

        Notification::make()
            ->title('Mentve')
            ->body('A beszállító vevőkód adatai elmentve.')
            ->success()
            ->send();
    }
}