<?php

namespace App\Casts;

use App\Lib\Discount;
use Illuminate\Contracts\Database\Eloquent\CastsAttributes;

class AsDiscount implements CastsAttributes
{
    /**
     * Cast the given value.
     *
     * @param  \Illuminate\Database\Eloquent\Model $model
     * @param  string                              $key
     * @param  mixed                               $value
     * @param  array                               $attributes
     * @return \App\Lib\Discount
     * @phpcs:disable Squiz.Commenting.FunctionComment.TypeHintMissing
     * @phpcs:disable Generic.CodeAnalysis.UnusedFunctionParameter.FoundInImplementedInterfaceBeforeLastUsed
     * @phpcs:disable Generic.CodeAnalysis.UnusedFunctionParameter.FoundInImplementedInterfaceAfterLastUsed
     */
    public function get($model, string $key, $value, array $attributes): Discount
    {
        // phpcs:enable
        $inputData = \json_decode($value, true);
        return Discount::make(...\array_values($inputData));
    }

    /**
     * Prepare the given value for storage.
     *
     * @param  \Illuminate\Database\Eloquent\Model $model
     * @param  string                              $key
     * @param  mixed                               $value
     * @param  array                               $attributes
     * @return string Json encoded \App\Lib\Inputs\Definition\Input
     * @phpcs:disable Squiz.Commenting.FunctionComment.TypeHintMissing
     * @phpcs:disable Generic.CodeAnalysis.UnusedFunctionParameter.FoundInImplementedInterfaceBeforeLastUsed
     * @phpcs:disable Generic.CodeAnalysis.UnusedFunctionParameter.FoundInImplementedInterfaceAfterLastUsed
     */
    public function set($model, string $key, $value, array $attributes)
    {
        // phpcs:enable
        $this->assertIsInput($value);
        /** @var \App\Lib\Discount $value */
        return $value->toJson();
    }

    /**
     * Assert is instance of \App\Lib\Discount
     *
     * @param mixed $value
     * @return void
     * @throws \RuntimeException If the value is not an input.
     */
    private function assertIsInput(mixed $value): void
    {
        if (!\is_object($value) or !($value instanceof Discount)) {
            $value = \json_encode($value);
            throw new \RuntimeException(
                __CLASS__ . ' needs value to be array of \'' . Discount::class . "' given is {$value}"
            );
        }
    }
}