<?php

namespace App\Services;

use App\Enums\ShipmentType;
use App\Models\Country;
use App\Models\Shipment;
use App\Models\SystemSetting;
use InvalidArgumentException;

class PriceCalculatorService
{
    public function calculate(array $data): array
    {
        $type = ShipmentType::from($data['type']);
        $direction = $data['direction'] === 'Outbound' ? 'export' : 'import';
        $chargeableWeight = max($data['weight'], $data['volumetric_weight']);

        $country = Country::where('iso_code', $data['country_iso'])->firstOrFail();

        $zone = match (true) {
            $type === ShipmentType::Parcel && $direction === 'export' => $country->export_zone_parcel,
            $type === ShipmentType::Parcel && $direction === 'import' => $country->import_zone_parcel,
            $type !== ShipmentType::Parcel && $direction === 'export' => $country->export_zone_doc,
            $type !== ShipmentType::Parcel && $direction === 'import' => $country->import_zone_doc,
        };

        $rate = $this->lookupRate($direction, $type, $chargeableWeight, $zone);

        $profitMargin = (float) SystemSetting::get('profit_margin', 1.25);
        $aedToIrr = (float) SystemSetting::get('aed_to_irr', 455000);
        $vatRate = (float) SystemSetting::get('vat_rate', 0.09);
        $packingCostDefault = (float) SystemSetting::get('packing_cost_default', 100000);

        $netDirham = $rate * $profitMargin;
        $netRial = $netDirham * $aedToIrr;

        $extraService = (float) ($data['extra_service'] ?? 0);
        $packingCost = (float) ($data['packing_cost'] ?? $packingCostDefault);
        $domesticPickup = (float) ($data['domestic_pickup'] ?? 0);
        $domesticDelivery = (float) ($data['domestic_delivery'] ?? 0);
        $warehousingCost = (float) ($data['warehousing_cost'] ?? 0);
        $discount = (float) ($data['discount'] ?? 0);

        $subtotal = $netRial + $extraService + $packingCost + $domesticPickup + $domesticDelivery + $warehousingCost - $discount;
        $totalFee = $subtotal * (1 + $vatRate);
        $vatAmount = $totalFee - $subtotal;

        return [
            'base_price' => $rate,
            'net_dirham' => $netDirham,
            'net_rial' => $netRial,
            'extra_service' => $extraService,
            'packing_cost' => $packingCost,
            'domestic_pickup' => $domesticPickup,
            'domestic_delivery' => $domesticDelivery,
            'warehousing_cost' => $warehousingCost,
            'discount' => $discount,
            'vat_amount' => $vatAmount,
            'total_fee' => $totalFee,
            'zone' => $zone,
            'chargeable_weight' => $chargeableWeight,
        ];
    }

    private function lookupRate(string $direction, ShipmentType $type, float $weight, int $zone): float
    {
        $zoneColumn = 'zone_' . $zone;

        $rate = \App\Models\ShippingRate::query()
            ->where('direction', $direction)
            ->where('type', $type->value)
            ->where('weight', '<=', $weight)
            ->where($zoneColumn, '>', 0)
            ->orderByDesc('weight')
            ->value($zoneColumn);

        if ($rate === null) {
            throw new InvalidArgumentException('No rate found for the given parameters.');
        }

        return (float) $rate;
    }
}