<?php

namespace Modules\Booking\Exceptions;

use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Modules\Shared\Enums\VehicleOption;
use RuntimeException;

class InvalidVehicleSelectionException extends RuntimeException
{
    public static function frontSeatLimitExceeded(int $requested, int $max): self
    {
        return new self("Front seat request [{$requested}] exceeds the max of [{$max}] per booking.");
    }

    public static function optionDisabled(VehicleOption $vehicleOption): self
    {
        return new self("Vehicle option [{$vehicleOption->value}] is not currently available for booking.");
    }

    public static function duplicateOption(VehicleOption $vehicleOption): self
    {
        return new self("Vehicle option [{$vehicleOption->value}] was selected more than once — combine it into a single selection.");
    }

    public static function wholeVehicleCannotBeCombined(): self
    {
        return new self('Whole Vehicle cannot be combined with other vehicle options in the same booking.');
    }

    /**
     * A rejected vehicle selection is a client input problem, not a server
     * error — surface it as 422 rather than the default 500. A broader JSON
     * error envelope for all of api/* is Phase 6 (T6.3); this keeps the
     * mapping local until that lands.
     */
    public function render(Request $request): ?JsonResponse
    {
        if ($request->expectsJson()) {
            return response()->json(['message' => $this->getMessage()], 422);
        }

        return null;
    }
}