<?php

namespace App\Filament\Pages;

use App\Services\PriceCalculatorService;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Section;
use Filament\Forms\Concerns\InteractsWithForms;
use Filament\Forms\Form;
use Filament\Pages\Page;
use App\Models\Country;

class PriceTestPage extends Page
{
    use InteractsWithForms;

    protected static ?string $navigationIcon = 'heroicon-o-calculator';
    protected static string $view = 'filament.pages.price-test-page';
    protected static ?string $navigationLabel = 'تست محاسبه قیمت';
    protected static ?string $navigationGroup = 'ابزارها';
    protected static ?int $navigationSort = 1;
    protected static bool $shouldRegisterNavigation = true; 

    public ?array $data = [];
    public ?array $result = null;

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

    public function form(Form $form): Form
    {
        return $form
            ->schema([
                Section::make('اطلاعات ارسال')
                    ->schema([
                        Select::make('direction')
                            ->label('جهت ارسال')
                            ->options(['export' => 'صادرات (خروج از ایران)', 'import' => 'واردات (ورود به ایران)'])
                            ->required()
                            ->reactive()
                            ->afterStateUpdated(fn ($state) => $this->result = null),

                        Select::make('type')
                            ->label('نوع محموله')
                            ->options(['DOCUMENT' => 'مدارک (DOCUMENT)', 'NON DOC' => 'غیر مدارک (NON DOC)'])
                            ->required()
                            ->afterStateUpdated(fn () => $this->result = null),
                    ])->columns(2),

                Section::make('مبدا و مقصد')
                    ->schema([
                        Select::make('origin_country_id')
                            ->label('کشور مبدا')
                            ->options(Country::all()->pluck('name', 'id'))
                            ->searchable()
                            ->required()
                            ->afterStateUpdated(fn () => $this->result = null),

                        Select::make('destination_country_id')
                            ->label('کشور مقصد')
                            ->options(Country::all()->pluck('name', 'id'))
                            ->searchable()
                            ->required()
                            ->afterStateUpdated(fn () => $this->result = null),
                    ])->columns(2),

                Section::make('ابعاد و وزن')
                    ->schema([
                        TextInput::make('weight')->label('وزن واقعی (کیلوگرم)')->numeric()->required()->afterStateUpdated(fn () => $this->result = null),
                        TextInput::make('length')->label('طول (سانتی‌متر)')->numeric()->required()->afterStateUpdated(fn () => $this->result = null),
                        TextInput::make('width')->label('عرض (سانتی‌متر)')->numeric()->required()->afterStateUpdated(fn () => $this->result = null),
                        TextInput::make('height')->label('ارتفاع (سانتی‌متر)')->numeric()->required()->afterStateUpdated(fn () => $this->result = null),
                    ])->columns(4),
            ])
            ->statePath('data');
    }

    public function calculate()
    {
        $data = $this->form->getState();

        // تعیین کشور مقصد (برای صادرات = مقصد، برای واردات = مبدا)
        $destinationId = ($data['direction'] === 'export')
            ? ($data['destination_country_id'] ?? null)
            : ($data['origin_country_id'] ?? null);

        $country = Country::find($destinationId);
        if (! $country) {
            \Filament\Notifications\Notification::make()
                ->title('خطا')
                ->body('کشور مقصد یافت نشد.')
                ->danger()
                ->send();
            return;
        }

        // محاسبه وزن حجمی از ابعاد (فرمول IATA: L×W×H/5000)
        $length = (float) ($data['length'] ?? 0);
        $width  = (float) ($data['width'] ?? 0);
        $height = (float) ($data['height'] ?? 0);
        $volumetricWeight = ($length * $width * $height) / 5000;

        $service = app(PriceCalculatorService::class);

        try {
            $this->result = $service->calculate([
                'direction'         => $data['direction'],       // 'export' | 'import'
                'type'              => $data['type'],              // 'DOCUMENT' | 'NON DOC'
                'country_iso'       => $country->iso_code,
                'weight'            => (float) $data['weight'],
                'volumetric_weight' => $volumetricWeight,
            ]);
        } catch (\Exception $e) {
            \Filament\Notifications\Notification::make()
                ->title('خطا در محاسبه قیمت')
                ->body($e->getMessage())
                ->danger()
                ->send();
            $this->result = null;
        }
    }
}