<?php

declare(strict_types=1);

namespace Doctrine\DBAL\Types;

use Doctrine\DBAL\Platforms\AbstractPlatform;
use Doctrine\DBAL\Types\Exception\SerializationFailed;
use Doctrine\DBAL\Types\Exception\ValueNotConvertible;
use JsonException;

use function is_resource;
use function json_decode;
use function json_encode;
use function stream_get_contents;

use const JSON_PRESERVE_ZERO_FRACTION;
use const JSON_THROW_ON_ERROR;

/** @internal */
trait JsonTypeConvert
{
    /**
     * @param T $value
     *
     * @return (T is null ? null : string)
     *
     * @template T
     */
    public function convertToDatabaseValue(mixed $value, AbstractPlatform $platform): ?string
    {
        if ($value === null) {
            return null;
        }

        try {
            return json_encode($value, JSON_THROW_ON_ERROR | JSON_PRESERVE_ZERO_FRACTION);
        } catch (JsonException $e) {
            throw SerializationFailed::new($value, 'json', $e->getMessage(), $e);
        }
    }

    public function convertToPHPValue(mixed $value, AbstractPlatform $platform): mixed
    {
        if ($value === null || $value === '') {
            return null;
        }

        if (is_resource($value)) {
            $value = stream_get_contents($value);
        }

        try {
            return json_decode($value, $this->isAssociative(), 512, JSON_THROW_ON_ERROR);
        } catch (JsonException $e) {
            throw ValueNotConvertible::new($value, 'json', $e->getMessage(), $e);
        }
    }

    abstract protected function isAssociative(): bool;
}
