<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Validator;

use Psr\Cache\CacheItemPoolInterface;
use Psr\Container\ContainerInterface;
use Symfony\Component\Validator\Context\ExecutionContextFactory;
use Symfony\Component\Validator\Exception\ValidatorException;
use Symfony\Component\Validator\Mapping\Factory\LazyLoadingMetadataFactory;
use Symfony\Component\Validator\Mapping\Factory\MetadataFactoryInterface;
use Symfony\Component\Validator\Mapping\Loader\AttributeLoader;
use Symfony\Component\Validator\Mapping\Loader\LoaderChain;
use Symfony\Component\Validator\Mapping\Loader\LoaderInterface;
use Symfony\Component\Validator\Mapping\Loader\StaticMethodLoader;
use Symfony\Component\Validator\Mapping\Loader\XmlFileLoader;
use Symfony\Component\Validator\Mapping\Loader\YamlFileLoader;
use Symfony\Component\Validator\Validator\RecursiveValidator;
use Symfony\Component\Validator\Validator\ValidatorInterface;
use Symfony\Contracts\Translation\LocaleAwareInterface;
use Symfony\Contracts\Translation\TranslatorInterface;
use Symfony\Contracts\Translation\TranslatorTrait;

// Help opcache.preload discover always-needed symbols
class_exists(TranslatorInterface::class);
class_exists(LocaleAwareInterface::class);
class_exists(TranslatorTrait::class);

/**
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class ValidatorBuilder
{
    private array $initializers = [];
    private array $loaders = [];
    private array $xmlMappings = [];
    private array $yamlMappings = [];
    private array $methodMappings = [];
    private bool $enableAttributeMapping = false;
    private ?MetadataFactoryInterface $metadataFactory = null;
    private ConstraintValidatorFactoryInterface $validatorFactory;
    private ?ContainerInterface $groupProviderLocator = null;
    private ?CacheItemPoolInterface $mappingCache = null;
    private ?TranslatorInterface $translator = null;
    private string|false|null $translationDomain = null;

    /**
     * Adds an object initializer to the validator.
     *
     * @return $this
     */
    public function addObjectInitializer(ObjectInitializerInterface $initializer): static
    {
        $this->initializers[] = $initializer;

        return $this;
    }

    /**
     * Adds a list of object initializers to the validator.
     *
     * @param ObjectInitializerInterface[] $initializers
     *
     * @return $this
     */
    public function addObjectInitializers(array $initializers): static
    {
        $this->initializers = array_merge($this->initializers, $initializers);

        return $this;
    }

    /**
     * Adds an XML constraint mapping file to the validator.
     *
     * @return $this
     */
    public function addXmlMapping(string $path): static
    {
        if (null !== $this->metadataFactory) {
            throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
        }

        $this->xmlMappings[] = $path;

        return $this;
    }

    /**
     * Adds a list of XML constraint mapping files to the validator.
     *
     * @param string[] $paths The paths to the mapping files
     *
     * @return $this
     */
    public function addXmlMappings(array $paths): static
    {
        if (null !== $this->metadataFactory) {
            throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
        }

        $this->xmlMappings = array_merge($this->xmlMappings, $paths);

        return $this;
    }

    /**
     * Adds a YAML constraint mapping file to the validator.
     *
     * @param string $path The path to the mapping file
     *
     * @return $this
     */
    public function addYamlMapping(string $path): static
    {
        if (null !== $this->metadataFactory) {
            throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
        }

        $this->yamlMappings[] = $path;

        return $this;
    }

    /**
     * Adds a list of YAML constraint mappings file to the validator.
     *
     * @param string[] $paths The paths to the mapping files
     *
     * @return $this
     */
    public function addYamlMappings(array $paths): static
    {
        if (null !== $this->metadataFactory) {
            throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
        }

        $this->yamlMappings = array_merge($this->yamlMappings, $paths);

        return $this;
    }

    /**
     * Enables constraint mapping using the given static method.
     *
     * @return $this
     */
    public function addMethodMapping(string $methodName): static
    {
        if (null !== $this->metadataFactory) {
            throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
        }

        $this->methodMappings[] = $methodName;

        return $this;
    }

    /**
     * Enables constraint mapping using the given static methods.
     *
     * @param string[] $methodNames The names of the methods
     *
     * @return $this
     */
    public function addMethodMappings(array $methodNames): static
    {
        if (null !== $this->metadataFactory) {
            throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
        }

        $this->methodMappings = array_merge($this->methodMappings, $methodNames);

        return $this;
    }

    /**
     * Enables attribute-based constraint mapping.
     *
     * @return $this
     */
    public function enableAttributeMapping(): static
    {
        if (null !== $this->metadataFactory) {
            throw new ValidatorException('You cannot enable attribute mapping after setting a custom metadata factory. Configure your metadata factory instead.');
        }

        $this->enableAttributeMapping = true;

        return $this;
    }

    /**
     * Disables attribute-based constraint mapping.
     *
     * @return $this
     */
    public function disableAttributeMapping(): static
    {
        $this->enableAttributeMapping = false;

        return $this;
    }

    /**
     * Sets the class metadata factory used by the validator.
     *
     * @return $this
     */
    public function setMetadataFactory(MetadataFactoryInterface $metadataFactory): static
    {
        if (\count($this->xmlMappings) > 0 || \count($this->yamlMappings) > 0 || \count($this->methodMappings) > 0 || $this->enableAttributeMapping) {
            throw new ValidatorException('You cannot set a custom metadata factory after adding custom mappings. You should do either of both.');
        }

        $this->metadataFactory = $metadataFactory;

        return $this;
    }

    /**
     * Sets the cache for caching class metadata.
     *
     * @return $this
     */
    public function setMappingCache(CacheItemPoolInterface $cache): static
    {
        if (null !== $this->metadataFactory) {
            throw new ValidatorException('You cannot set a custom mapping cache after setting a custom metadata factory. Configure your metadata factory instead.');
        }

        $this->mappingCache = $cache;

        return $this;
    }

    /**
     * Sets the constraint validator factory used by the validator.
     *
     * @return $this
     */
    public function setConstraintValidatorFactory(ConstraintValidatorFactoryInterface $validatorFactory): static
    {
        $this->validatorFactory = $validatorFactory;

        return $this;
    }

    /**
     * @return $this
     */
    public function setGroupProviderLocator(ContainerInterface $groupProviderLocator): static
    {
        $this->groupProviderLocator = $groupProviderLocator;

        return $this;
    }

    /**
     * Sets the translator used for translating violation messages.
     *
     * @return $this
     */
    public function setTranslator(TranslatorInterface $translator): static
    {
        $this->translator = $translator;

        return $this;
    }

    /**
     * Sets the default translation domain of violation messages.
     *
     * The same message can have different translations in different domains.
     * Pass the domain that is used for violation messages by default to this
     * method.
     *
     * @return $this
     */
    public function setTranslationDomain(?string $translationDomain): static
    {
        $this->translationDomain = $translationDomain;

        return $this;
    }

    /**
     * @return $this
     */
    public function disableTranslation(): static
    {
        $this->translationDomain = false;

        return $this;
    }

    /**
     * @return $this
     */
    public function addLoader(LoaderInterface $loader): static
    {
        $this->loaders[] = $loader;

        return $this;
    }

    /**
     * @return LoaderInterface[]
     */
    public function getLoaders(): array
    {
        $loaders = [];

        foreach ($this->xmlMappings as $xmlMapping) {
            $loaders[] = new XmlFileLoader($xmlMapping);
        }

        foreach ($this->yamlMappings as $yamlMappings) {
            $loaders[] = new YamlFileLoader($yamlMappings);
        }

        foreach ($this->methodMappings as $methodName) {
            $loaders[] = new StaticMethodLoader($methodName);
        }

        if ($this->enableAttributeMapping) {
            $loaders[] = new AttributeLoader();
        }

        return array_merge($loaders, $this->loaders);
    }

    /**
     * Builds and returns a new validator object.
     */
    public function getValidator(): ValidatorInterface
    {
        $metadataFactory = $this->metadataFactory;

        if (!$metadataFactory) {
            $loaders = $this->getLoaders();
            $loader = null;

            if (\count($loaders) > 1) {
                $loader = new LoaderChain($loaders);
            } elseif (1 === \count($loaders)) {
                $loader = $loaders[0];
            }

            $metadataFactory = new LazyLoadingMetadataFactory($loader, $this->mappingCache);
        }

        $validatorFactory = $this->validatorFactory ?? new ConstraintValidatorFactory();
        $translator = $this->translator;

        if (null === $translator) {
            $translator = new class implements TranslatorInterface, LocaleAwareInterface {
                use TranslatorTrait;
            };
            // Force the locale to be 'en' when no translator is provided rather than relying on the Intl default locale
            // This avoids depending on Intl or the stub implementation being available. It also ensures that Symfony
            // validation messages are pluralized properly even when the default locale gets changed because they are in
            // English.
            $translator->setLocale('en');
        }

        $contextFactory = new ExecutionContextFactory($translator, $this->translationDomain);

        return new RecursiveValidator($contextFactory, $metadataFactory, $validatorFactory, $this->initializers, $this->groupProviderLocator);
    }
}
