<?php

declare(strict_types=1);

namespace App\Casts;

use Domain\Models\ValueObjects\Products\NutritionalValue;
use Domain\Models\ValueObjects\Products\NutritionalValues;
use Domain\Models\ValueObjects\Products\NutritionnalUnit;
use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Arr;

/**
 * @implements CastsAttributes<NutritionalValues|null, NutritionalValues|array<string, mixed>|string|null>
 */
class NutritionalValuesCast implements CastsAttributes
{
    /**
     * @param  array<string, mixed>  $attributes
     */
    public function get(Model $model, string $key, mixed $value, array $attributes): ?NutritionalValues
    {
        if ($value === null || $value === '' || $value === '[]') {
            return null;
        }

        if (! is_string($value)) {
            throw new \InvalidArgumentException('The given value is not a string.');
        }

        $data = json_decode($value, true);

        if (! is_array($data)) {
            throw new \InvalidArgumentException('The given value is not a valid JSON array.');
        }

        if ($data === []) {
            return null;
        }

        return $this->fromArray($data);
    }

    /**
     * @param  array<string, mixed>  $attributes
     * @return array<string, string>
     */
    public function set(Model $model, string $key, mixed $value, array $attributes): array
    {
        if ($value === null || $value === [] || $value === '' || $value === '[]') {
            return [$key => '[]'];
        }

        if (is_string($value)) {
            $value = json_decode($value, true);
        }

        if (is_array($value)) {
            $value = $this->fromArray($value);
        }

        if ($value === null) {
            return [$key => '[]'];
        }

        if (! $value instanceof NutritionalValues) {
            throw new \InvalidArgumentException('The given value is not a NutritionalValues instance.');
        }

        return [$key => (string) json_encode($value->toArray(), JSON_THROW_ON_ERROR)];
    }

    /**
     * @param  array<array-key, mixed>  $data
     */
    private function fromArray(array $data): ?NutritionalValues
    {
        if ($data === []) {
            return null;
        }

        $getProperty = function (string $key) use ($data): ?NutritionalValue {
            $item = Arr::get($data, $key);

            return is_array($item) ? $this->toNutritionalValue($item) : null;
        };

        $refWeightG = $getProperty('refWeightG');

        if ($refWeightG === null) {
            return null;
        }

        return new NutritionalValues(
            refWeightG: $refWeightG,
            kj: $getProperty('kj'),
            kcal: $getProperty('kcal'),
            fatG: $getProperty('fatG'),
            satFatG: $getProperty('satFatG'),
            carbG: $getProperty('carbG'),
            sugarG: $getProperty('sugarG'),
            fiberG: $getProperty('fiberG'),
            proteinG: $getProperty('proteinG'),
            saltG: $getProperty('saltG'),
        );
    }

    /**
     * @param  array<array-key, mixed>  $data
     */
    private function toNutritionalValue(array $data): ?NutritionalValue
    {
        $rawItemVal  = Arr::get($data, 'value');
        $rawItemUnit = Arr::get($data, 'unit');

        if (! is_string($rawItemVal) && ! is_numeric($rawItemVal)) {
            return null;
        }

        if (! is_string($rawItemUnit) && ! $rawItemUnit instanceof NutritionnalUnit) {
            return null;
        }

        $value = mb_trim((string) $rawItemVal);
        $unit  = $rawItemUnit instanceof NutritionnalUnit
            ? $rawItemUnit
            : NutritionnalUnit::tryFrom((string) $rawItemUnit);

        if ($value === '' || $unit === null) {
            return null;
        }

        return new NutritionalValue($value, $unit);
    }
}