<?php

/*
 * Copyright 2013 Johannes M. Schmitt <schmittjoh@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace JMS\Serializer;

use JMS\Serializer\Handler\PhpCollectionHandler;
use JMS\Serializer\Handler\PropelCollectionHandler;
use JMS\Serializer\Exception\RuntimeException;
use Metadata\MetadataFactory;
use JMS\Serializer\Metadata\Driver\AnnotationDriver;
use JMS\Serializer\Handler\HandlerRegistry;
use JMS\Serializer\Construction\UnserializeObjectConstructor;
use PhpCollection\Map;
use JMS\Serializer\EventDispatcher\EventDispatcher;
use Metadata\Driver\DriverChain;
use JMS\Serializer\Metadata\Driver\YamlDriver;
use JMS\Serializer\Metadata\Driver\XmlDriver;
use Metadata\Driver\FileLocator;
use JMS\Serializer\Handler\DateHandler;
use JMS\Serializer\Handler\ArrayCollectionHandler;
use JMS\Serializer\Construction\ObjectConstructorInterface;
use JMS\Serializer\EventDispatcher\Subscriber\DoctrineProxySubscriber;
use JMS\Serializer\Naming\CamelCaseNamingStrategy;
use JMS\Serializer\Naming\PropertyNamingStrategyInterface;
use Doctrine\Common\Annotations\Reader;
use Doctrine\Common\Annotations\AnnotationReader;
use Doctrine\Common\Annotations\FileCacheReader;
use Metadata\Cache\FileCache;
use JMS\Serializer\Naming\SerializedNameAnnotationStrategy;
use JMS\Serializer\Exception\InvalidArgumentException;

/**
 * Builder for serializer instances.
 *
 * This object makes serializer construction a breeze for projects that do not use
 * any special dependency injection container.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class SerializerBuilder
{
    private $metadataDirs = array();
    private $handlerRegistry;
    private $handlersConfigured = false;
    private $eventDispatcher;
    private $listenersConfigured = false;
    private $objectConstructor;
    private $serializationVisitors;
    private $deserializationVisitors;
    private $visitorsAdded = false;
    private $propertyNamingStrategy;
    private $debug = false;
    private $cacheDir;
    private $annotationReader;
    private $includeInterfaceMetadata = false;

    public static function create()
    {
        return new static();
    }

    public function __construct()
    {
        $this->handlerRegistry = new HandlerRegistry();
        $this->eventDispatcher = new EventDispatcher();
        $this->serializationVisitors = new Map();
        $this->deserializationVisitors = new Map();
    }

    public function setAnnotationReader(Reader $reader)
    {
        $this->annotationReader = $reader;

        return $this;
    }

    public function setDebug($bool)
    {
        $this->debug = (boolean) $bool;

        return $this;
    }

    public function setCacheDir($dir)
    {
        if ( ! is_dir($dir)) {
            $this->createDir($dir);
        }
        if ( ! is_writable($dir)) {
            throw new InvalidArgumentException(sprintf('The cache directory "%s" is not writable.', $dir));
        }

        $this->cacheDir = $dir;

        return $this;
    }

    public function addDefaultHandlers()
    {
        $this->handlersConfigured = true;
        $this->handlerRegistry->registerSubscribingHandler(new DateHandler());
        $this->handlerRegistry->registerSubscribingHandler(new PhpCollectionHandler());
        $this->handlerRegistry->registerSubscribingHandler(new ArrayCollectionHandler());
        $this->handlerRegistry->registerSubscribingHandler(new PropelCollectionHandler());

        return $this;
    }

    public function configureHandlers(\Closure $closure)
    {
        $this->handlersConfigured = true;
        $closure($this->handlerRegistry);

        return $this;
    }

    public function addDefaultListeners()
    {
        $this->listenersConfigured = true;
        $this->eventDispatcher->addSubscriber(new DoctrineProxySubscriber());

        return $this;
    }

    public function configureListeners(\Closure $closure)
    {
        $this->listenersConfigured = true;
        $closure($this->eventDispatcher);

        return $this;
    }

    public function setObjectConstructor(ObjectConstructorInterface $constructor)
    {
        $this->objectConstructor = $constructor;

        return $this;
    }

    public function setPropertyNamingStrategy(PropertyNamingStrategyInterface $propertyNamingStrategy)
    {
        $this->propertyNamingStrategy = $propertyNamingStrategy;

        return $this;
    }

    public function setSerializationVisitor($format, VisitorInterface $visitor)
    {
        $this->visitorsAdded = true;
        $this->serializationVisitors->set($format, $visitor);

        return $this;
    }

    public function setDeserializationVisitor($format, VisitorInterface $visitor)
    {
        $this->visitorsAdded = true;
        $this->deserializationVisitors->set($format, $visitor);

        return $this;
    }

    public function addDefaultSerializationVisitors()
    {
        $this->initializePropertyNamingStrategy();

        $this->visitorsAdded = true;
        $this->serializationVisitors->setAll(array(
            'xml' => new XmlSerializationVisitor($this->propertyNamingStrategy),
            'yml' => new YamlSerializationVisitor($this->propertyNamingStrategy),
            'json' => new JsonSerializationVisitor($this->propertyNamingStrategy),
        ));

        return $this;
    }

    public function addDefaultDeserializationVisitors()
    {
        $this->initializePropertyNamingStrategy();

        $this->visitorsAdded = true;
        $this->deserializationVisitors->setAll(array(
            'xml' => new XmlDeserializationVisitor($this->propertyNamingStrategy),
            'json' => new JsonDeserializationVisitor($this->propertyNamingStrategy),
        ));

        return $this;
    }

    /**
     * @param Boolean $include Whether to include the metadata from the interfaces
     *
     * @return SerializerBuilder
     */
    public function includeInterfaceMetadata($include)
    {
        $this->includeInterfaceMetadata = (Boolean) $include;

        return $this;
    }

    /**
     * Sets a map of namespace prefixes to directories.
     *
     * This method overrides any previously defined directories.
     *
     * @param array<string,string> $namespacePrefixToDirMap
     *
     * @return SerializerBuilder
     *
     * @throws InvalidArgumentException When a directory does not exist
     */
    public function setMetadataDirs(array $namespacePrefixToDirMap)
    {
        foreach ($namespacePrefixToDirMap as $dir) {
            if ( ! is_dir($dir)) {
                throw new InvalidArgumentException(sprintf('The directory "%s" does not exist.', $dir));
            }
        }

        $this->metadataDirs = $namespacePrefixToDirMap;

        return $this;
    }

    /**
     * Adds a directory where the serializer will look for class metadata.
     *
     * The namespace prefix will make the names of the actual metadata files a bit shorter. For example, let's assume
     * that you have a directory where you only store metadata files for the ``MyApplication\Entity`` namespace.
     *
     * If you use an empty prefix, your metadata files would need to look like:
     *
     * ``my-dir/MyApplication.Entity.SomeObject.yml``
     * ``my-dir/MyApplication.Entity.OtherObject.xml``
     *
     * If you use ``MyApplication\Entity`` as prefix, your metadata files would need to look like:
     *
     * ``my-dir/SomeObject.yml``
     * ``my-dir/OtherObject.yml``
     *
     * Please keep in mind that you currently may only have one directory per namespace prefix.
     *
     * @param string $dir The directory where metadata files are located.
     * @param string $namespacePrefix An optional prefix if you only store metadata for specific namespaces in this directory.
     *
     * @return SerializerBuilder
     *
     * @throws InvalidArgumentException When a directory does not exist
     * @throws InvalidArgumentException When a directory has already been registered
     */
    public function addMetadataDir($dir, $namespacePrefix = '')
    {
        if ( ! is_dir($dir)) {
            throw new InvalidArgumentException(sprintf('The directory "%s" does not exist.', $dir));
        }

        if (isset($this->metadataDirs[$namespacePrefix])) {
            throw new InvalidArgumentException(sprintf('There is already a directory configured for the namespace prefix "%s". Please use replaceMetadataDir() to override directories.', $namespacePrefix));
        }

        $this->metadataDirs[$namespacePrefix] = $dir;

        return $this;
    }

    /**
     * Adds a map of namespace prefixes to directories.
     *
     * @param array<string,string> $namespacePrefixToDirMap
     *
     * @return SerializerBuilder
     */
    public function addMetadataDirs(array $namespacePrefixToDirMap)
    {
        foreach ($namespacePrefixToDirMap as $prefix => $dir) {
            $this->addMetadataDir($dir, $prefix);
        }

        return $this;
    }

    /**
     * Similar to addMetadataDir(), but overrides an existing entry.
     *
     * @param string $dir
     * @param string $namespacePrefix
     *
     * @return SerializerBuilder
     *
     * @throws InvalidArgumentException When a directory does not exist
     * @throws InvalidArgumentException When no directory is configured for the ns prefix
     */
    public function replaceMetadataDir($dir, $namespacePrefix = '')
    {
        if ( ! is_dir($dir)) {
            throw new InvalidArgumentException(sprintf('The directory "%s" does not exist.', $dir));
        }

        if ( ! isset($this->metadataDirs[$namespacePrefix])) {
            throw new InvalidArgumentException(sprintf('There is no directory configured for namespace prefix "%s". Please use addMetadataDir() for adding new directories.', $namespacePrefix));
        }

        $this->metadataDirs[$namespacePrefix] = $dir;

        return $this;
    }

    public function build()
    {
        $annotationReader = $this->annotationReader;
        if (null === $annotationReader) {
            $annotationReader = new AnnotationReader();

            if (null !== $this->cacheDir) {
                $this->createDir($this->cacheDir.'/annotations');
                $annotationReader = new FileCacheReader($annotationReader, $this->cacheDir.'/annotations', $this->debug);
            }
        }

        if ( ! empty($this->metadataDirs)) {
            $fileLocator = new FileLocator($this->metadataDirs);
            $metadataDriver = new DriverChain(array(
                new YamlDriver($fileLocator),
                new XmlDriver($fileLocator),
                new AnnotationDriver($annotationReader),
            ));
        } else {
            $metadataDriver = new AnnotationDriver($annotationReader);
        }

        $metadataFactory = new MetadataFactory($metadataDriver, null, $this->debug);

        $metadataFactory->setIncludeInterfaces($this->includeInterfaceMetadata);

        if (null !== $this->cacheDir) {
            $this->createDir($this->cacheDir.'/metadata');
            $metadataFactory->setCache(new FileCache($this->cacheDir.'/metadata'));
        }

        if ( ! $this->handlersConfigured) {
            $this->addDefaultHandlers();
        }

        if ( ! $this->listenersConfigured) {
            $this->addDefaultListeners();
        }

        if ( ! $this->visitorsAdded) {
            $this->addDefaultSerializationVisitors();
            $this->addDefaultDeserializationVisitors();
        }

        return new Serializer(
            $metadataFactory,
            $this->handlerRegistry,
            $this->objectConstructor ?: new UnserializeObjectConstructor(),
            $this->serializationVisitors,
            $this->deserializationVisitors,
            $this->eventDispatcher
        );
    }

    private function initializePropertyNamingStrategy()
    {
        if (null !== $this->propertyNamingStrategy) {
            return;
        }

        $this->propertyNamingStrategy = new SerializedNameAnnotationStrategy(new CamelCaseNamingStrategy());
    }

    private function createDir($dir)
    {
        if (is_dir($dir)) {
            return;
        }

        if (false === @mkdir($dir, 0777, true)) {
            throw new RuntimeException(sprintf('Could not create directory "%s".', $dir));
        }
    }
}