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<?php

/**
 * MvcCore
 *
 * This source file is subject to the BSD 3 License
 * For the full copyright and license information, please view 
 * the LICENSE.md file that are distributed with this source code.
 *
 * @copyright   Copyright (c) 2016 Tom Flídr (https://github.com/mvccore/mvccore)
 * @license     https://mvccore.github.io/docs/mvccore/4.0.0/LICENCE.md
 */

namespace MvcCore\Ext\Form\Core;

//require_once('MvcCore/View.php');

//require_once('Helpers.php');
//require_once('Configuration.php');

use \MvcCore\Ext\Form;

class View extends \MvcCore\View
{
    /**
     * @var \MvcCore\Ext\Form
     */
    public $Form = null;
    /**
     * @var \MvcCore\View|mixed
     */
    public $View = null;

    /**
     * Form View Constructor, extending \MvcCore\View
     * @param \MvcCore\Ext\Form $form 
     */
    public function __construct (\MvcCore\Ext\Form & $form) {
        $ctrl = & $form->Controller;
        if (class_exists('\MvcCore\Controller') && $ctrl instanceof \MvcCore\Controller) {
            parent::__construct($ctrl);
        } else {
            $this->Controller = & $ctrl;
        }
        $this->Form = & $form;
        include_once('Helpers.php');
        $this->View = Helpers::GetControllerView($ctrl);
    }
    /**
     * Call public field method if exists under called name or try to call any parent view helper.
     * @param string $method 
     * @param mixed  $arguments 
     * @return mixed
     */
    public function __call ($method, $arguments) {
        if (isset($this->Field) && method_exists($this->Field, $method)) {
            return call_user_func_array(array($this->Field, $method), $arguments);
        } else {
            return parent::__call($method, $arguments);
        }
    }
    /**
     * Render configured form template.
     * @return string
     */
    public function RenderTemplate () {
        return $this->Render($this->Form->TemplateTypePath, $this->Form->TemplatePath);
    }
    /**
     * Render form naturaly by cycles inside php scripts.
     * All form fields will be rendered inside empty <div> elements.
     * @return string
     */
    public function RenderNaturally () {
        return $this->RenderBegin() . $this->RenderErrors() . $this->RenderContent() . $this->RenderEnd();
    }
    /**
     * Render form begin.
     * Render opening <form> tag and hidden input with csrf tokens.
     * @return string
     */
    public function RenderBegin () {
        $result = "<form";
        $attrs = array();
        $form = & $this->Form;
        $formProperties = array('Id', 'Action', 'Method', 'Enctype');
        foreach ($formProperties as $property) {
            if ($form->$property) $attrs[strtolower($property)] = $form->$property;
        }
        if ($form->CssClass) $attrs['class'] = $form->CssClass;
        foreach ($form->Attributes as $key => $value) {
            if (!in_array($key, $formProperties)) $attrs[$key] = $value;
        }
        $attrsStr = self::RenderAttrs($attrs);
        if ($attrsStr) $result .= ' ' . $attrsStr;
        $result .= '>';
        $result .= $this->RenderCsrf();
        return $result;
    }
    /**
     * Render hidden input with CSRF tokens.
     * This method is not necessary to call, it's 
     * called internaly by $form->View->RenderBegin();
     * @return string
     */
    public function RenderCsrf () {
        list ($name, $value) = $this->Form->SetUpCsrf();
        return '<input type="hidden" name="'.$name.'" value="'.$value.'" />';
    }
    /**
     * Return current cross site request forgery hidden
     * input name and it's value as stdClass.
     * Result stdClass elements has keys 'name' and 'value'.
     * @return \stdClass
     */
    public function GetCsrf () {
        return $this->Form->GetCsrf();
    }
    /**
     * Render form errors.
     * If form is configured to render all errors together at form beginning,
     * this function completes all form errors into div.errors with div.error elements
     * inside containing each single errors message.
     * @return string
     */
    public function RenderErrors () {
        $result = "";
        include_once('Configuration.php');
        if ($this->Form->Errors && $this->Form->ErrorsRenderMode == Configuration::ERROR_RENDER_MODE_ALL_TOGETHER) {
            $result .= '<div class="errors">';
            foreach ($this->Form->Errors as & $errorMessageAndFieldName) {
                $errorMessage = $errorMessageAndFieldName[0];
                $fieldName = isset($errorMessageAndFieldName[1]) ? $errorMessageAndFieldName[1] : '' ;
                $result .= '<div class="error ' . $fieldName . '">'.$errorMessage.'</div>';
            }
            $result .= '</div>';
        }
        return $result;
    }
    /**
     * Render form content.
     * Go through all $form->Fields and call $field->Render(); on every field
     * and put it into an empty <div> element. Render each field in full possible
     * way - naturaly by label configuration with possible errors configured beside
     * or with custom field template.
     * @return string
     */
    public function RenderContent () {
        $result = "";
        $fieldRendered = "";
        foreach ($this->Form->Fields as & $field) {
            $fieldRendered = $field->Render();
            include_once(__DIR__ . '/../Hidden.php');
            if (!($field instanceof Form\Hidden)) {
                $fieldRendered = "<div>".$fieldRendered."</div>";
            }
            $result .= $fieldRendered;
        }
        return $result;
    }
    /**
     * Render form end.
     * Render html closing </form> tag and supporting javascript and css files
     * if is form not using external js/css renderers.
     * @return string
     */
    public function RenderEnd () {
        $result = "</form>";
        if ($this->Js) $result .= $this->Form->RenderJs();
        if ($this->Css) $result .= $this->Form->RenderCss();
        return $result;
    }
    /**
     * Format string function.
     * @param string $str template with replacements like {0}, {1}, {anyStringKey}...
     * @param array $args each value under it's index is replaced as 
     *                    string representation by replacement in form {arrayKey}
     * @return string
     */
    public static function Format ($str = '', array $args = array()) {
        foreach ($args as $key => $value) {
            $str = str_replace('{'.$key.'}', (string)$value, $str);
        }
        return $str;
    }
    /**
     * Render content of html tag attributes by key/value array.
     * @param array $atrributes 
     * @return string
     */
    public static function RenderAttrs (array $atrributes = array()) {
        $result = array();
        foreach ($atrributes as $attrName => $attrValue) {
            $result[] = $attrName.'="'.$attrValue.'"';
        }
        return implode(' ', $result);
    }
}