<?php
/*
 * This file is part of the Sonata package.
 *
 * (c) Thomas Rabaix <thomas.rabaix@sonata-project.org>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 */
namespace Sonata\AdminBundle\Form;

use Sonata\AdminBundle\Builder\FormContractorInterface;
use Sonata\AdminBundle\Admin\AdminInterface;
use Sonata\AdminBundle\Admin\FieldDescriptionInterface;
use Symfony\Component\Form\FormBuilder;

/**
 * This class is use to simulate the Form API
 *
 */
class FormMapper
{
    protected $formBuilder;

    protected $formContractor;

    protected $admin;

    public function __construct(FormContractorInterface $formContractor, FormBuilder $formBuilder, AdminInterface $admin)
    {
        $this->formBuilder      = $formBuilder;
        $this->formContractor   = $formContractor;
        $this->admin            = $admin;
    }

    /**
     * The method add a new field to the provided FormBuilder, there are 4 ways to add new field :
     *
     *   - if $name is a string with no related FieldDescription, then the form will use the FormFactory
     *     to instantiate a new Field
     *   - if $name is a FormDescription, the method uses information defined in the FormDescription to
     *     instantiate a new Field
     *   - if $name is a FormBuilder, then a FieldDescriptionInterface is created, the FormBuilder is added to
     *     the form
     *   - if $name is a string with a related FieldDescription, then the method uses information defined in the
     *     FormDescription to instantiate a new Field
     *
     * @throws \RuntimeException
     * @param string $name
     * @param array $fieldOptions
     * @param array $fieldDescriptionOptions
     * @return \Symfony\Component\Form\FieldInterface|void
     */
    public function add($name, array $fieldOptions = array(), array $fieldDescriptionOptions = array())
    {
        $fieldType = false;
        if ($name instanceof FieldDescriptionInterface) {

            $fieldDescription = $name;
            $fieldDescription->mergeOptions($fieldDescriptionOptions);

        } else if ($name instanceof FormBuilder) {

            $fieldType   = $name;

            $fieldDescription = $this->admin->getModelManager()->getNewFieldDescriptionInstance(
                $this->admin->getClass(),
                $fieldType->getName(),
                $fieldDescriptionOptions
            );

            $this->formContractor->fixFieldDescription($this->admin, $fieldDescription, $fieldDescriptionOptions);

            $this->admin->addFormFieldDescription($fieldType->getName(), $fieldDescription);

        } else if (is_string($name) && !$this->admin->hasFormFieldDescription($name)) {

            $fieldDescription = $this->admin->getModelManager()->getNewFieldDescriptionInstance(
                $this->admin->getClass(),
                $name,
                $fieldDescriptionOptions
            );

            // set default configuration
            $this->formContractor->fixFieldDescription($this->admin, $fieldDescription, $fieldDescriptionOptions);

            // add the FieldDescription
            $this->admin->addFormFieldDescription($name, $fieldDescription);

        } else if (is_string($name) && $this->admin->hasFormFieldDescription($name)) {
            $fieldDescription = $this->admin->getFormFieldDescription($name);

            // update configuration
            $this->formContractor->fixFieldDescription($this->admin, $fieldDescription, $fieldDescriptionOptions);

        } else {

            throw new \RuntimeException('invalid state');
        }

        $fieldDescription->mergeOption('form_field_options', $fieldOptions);

        // nothing to build as a Field is provided
        if ($fieldType) {
            $this->formBuilder->add($fieldType);
        }

        // add the field with the FormBuilder
        $this->formContractor->addField(
            $this->formBuilder,
            $fieldDescription
        );

        return $this;
    }

    /**
     * @param string $name
     * @param string $type
     * @param array $options
     * @param array $fieldDescriptionOptions
     * @return \Symfony\Component\Form\FormInterface
     */
    public function addType($name, $type, array $options = array(), array $fieldDescriptionOptions = array())
    {
        if (!isset($fieldDescriptionOptions['type'])) {
            $fieldDescriptionOptions['type'] = $type;
        }

        $fieldDescription = $this->admin->getModelManager()->getNewFieldDescriptionInstance(
            $this->admin->getClass(),
            $name,
            $fieldDescriptionOptions
        );

        $this->formContractor->fixFieldDescription($this->admin, $fieldDescription, $fieldDescriptionOptions);

        $this->admin->addFormFieldDescription($name, $fieldDescription);

        $this->formBuilder->add($name, $type, $options);

        return $this;
    }

    /**
     * @param string $name
     * @return \Symfony\Component\Form\FieldInterface
     */
    public function get($name)
    {
        return $this->formBuilder->get($name);
    }

    /**
     * @param string $key
     * @return boolean
     */
    public function has($key)
    {
        return $this->formBuilder->has($key);
    }

    /**
     * @param string $key
     * @return void
     */
    public function remove($key)
    {
        $this->admin->removeFormFieldDescription($key);
        $this->formBuilder->remove($key);
    }

    /**
     * @return \Symfony\Component\Form\FormBuilder
     */
    public function getFormBuilder()
    {
        return $this->formBuilder;
    }

    /**
     * @return \Sonata\AdminBundle\Admin\AdminInterface
     */
    public function getAdmin()
    {
        return $this->admin;
    }
}