<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

declare(strict_types=1);

namespace Nette\Schema\Elements;

use Nette;
use Nette\Schema\Context;
use Nette\Schema\Helpers;


/**
 * @internal
 */
trait Base
{
    private bool $required = false;
    private mixed $default = null;

    /** @var ?callable */
    private $before;

    /** @var callable[] */
    private array $transforms = [];
    private ?string $deprecated = null;


    public function default(mixed $value): self
    {
        $this->default = $value;
        return $this;
    }


    public function required(bool $state = true): self
    {
        $this->required = $state;
        return $this;
    }


    public function before(callable $handler): self
    {
        $this->before = $handler;
        return $this;
    }


    public function castTo(string $type): self
    {
        return $this->transform(Helpers::getCastStrategy($type));
    }


    public function transform(callable $handler): self
    {
        $this->transforms[] = $handler;
        return $this;
    }


    public function assert(callable $handler, ?string $description = null): self
    {
        $expected = $description ?: (is_string($handler) ? "$handler()" : '#' . count($this->transforms));
        return $this->transform(function ($value, Context $context) use ($handler, $description, $expected) {
            if ($handler($value)) {
                return $value;
            }
            $context->addError(
                'Failed assertion ' . ($description ? "'%assertion%'" : '%assertion%') . ' for %label% %path% with value %value%.',
                Nette\Schema\Message::FailedAssertion,
                ['value' => $value, 'assertion' => $expected],
            );
        });
    }


    /** Marks as deprecated */
    public function deprecated(string $message = 'The item %path% is deprecated.'): self
    {
        $this->deprecated = $message;
        return $this;
    }


    public function completeDefault(Context $context): mixed
    {
        if ($this->required) {
            $context->addError(
                'The mandatory item %path% is missing.',
                Nette\Schema\Message::MissingItem,
            );
            return null;
        }

        return $this->default;
    }


    public function doNormalize(mixed $value, Context $context): mixed
    {
        if ($this->before) {
            $value = ($this->before)($value);
        }

        return $value;
    }


    private function doDeprecation(Context $context): void
    {
        if ($this->deprecated !== null) {
            $context->addWarning(
                $this->deprecated,
                Nette\Schema\Message::Deprecated,
            );
        }
    }


    private function doTransform(mixed $value, Context $context): mixed
    {
        $isOk = $context->createChecker();
        foreach ($this->transforms as $handler) {
            $value = $handler($value, $context);
            if (!$isOk()) {
                return null;
            }
        }
        return $value;
    }


    /** @deprecated use Nette\Schema\Validators::validateType() */
    private function doValidate(mixed $value, string $expected, Context $context): bool
    {
        $isOk = $context->createChecker();
        Helpers::validateType($value, $expected, $context);
        return $isOk();
    }


    /** @deprecated use Nette\Schema\Validators::validateRange() */
    private static function doValidateRange(mixed $value, array $range, Context $context, string $types = ''): bool
    {
        $isOk = $context->createChecker();
        Helpers::validateRange($value, $range, $context, $types);
        return $isOk();
    }


    /** @deprecated use doTransform() */
    private function doFinalize(mixed $value, Context $context): mixed
    {
        return $this->doTransform($value, $context);
    }
}

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