<?php
if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

    class atkp_external_featuredimage {

        public function __construct()
        {
            add_filter('post_thumbnail_html', array($this, 'post_thumbnail_html'), 10, 5);
            
        //return apply_filters( 'woocommerce_product_gallery_attachment_ids', array_filter( array_filter( (array) explode( ',', $this->product_image_gallery ) ), 'wp_attachment_is_image' ), $this );
    

            $importgallerymode = atkp_options::$loader->get_woo_imagegallerymode();
            switch($importgallerymode) {
                case 0:
                    //mache nichts
                    break;
                case 1:
                    //external image
                    add_action('woocommerce_product_thumbnails', array($this, 'custom_links'));
                    break;
                case 2:
                    //importiert die gallerie
                    break;
                default:
                    throw new exception('unknown $importgallerymode: '.$importgallerymode);                
                
            }

            add_action( 'save_post', array(&$this, 'wooproduct_detail_save' )); 
            
            //TODO: woocommerce gallerie
            //add_filter( 'woocommerce_product_gallery_attachment_ids', array($this, 'woocommerce_product_gallery_attachment_ids'), 10,2);
            //add_filter( 'woocommerce_single_product_image_thumbnail_html', array($this, 'woocommerce_single_product_image_thumbnail_html'), 10, 4 ); 
        }
        
        function wooproduct_detail_save($post_id) {
             if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) 
    			return;
    	
    		$posttype =  ATKPTools::get_post_parameter('post_type', 'string');
    	
    		if ('product' != $posttype ) {
    			return;
    		} 
            
            $importimagemode = atkp_options::$loader->get_woo_importimagemode();
                    
            switch($importimagemode) {
                case 0:
                case 1:
                    //mache nichts
                    break;
                case 2:
                    //verlinkt das bild mit dem externen bild
                    $featuredimage = new atkp_external_featuredimage();
                    $featuredimage->set_external_postimage($post_id);
                    break;
                default:
                    throw new exception('unknown imagemode: '.$importimagemode);                
            }
        }
        
        function custom_links() {
            
            $prdid = $this->get_productid();
            
            if(!$prdid)
                return;

            //TODO: css attribute von woo holen und mitgeben
            $myproduct= atkp_product::load($prdid);       
            
            if(is_array($myproduct->images) && !defined('ATKP_WOOIMAGES')) {
                define('ATKP_WOOIMAGES', 1);
                $loop 		= 0;
            	$columns 	= apply_filters( 'woocommerce_product_thumbnails_columns', 3 );
                $html = '<div class="thumbnails columns-' . $columns .'">';    
                
                foreach($myproduct->images as $image) {
                    $thumb_url = $image->mediumimageurl;
                    if($thumb_url == '')
                        $thumb_url = $image->smallimageurl;
                    if($thumb_url == '')
                        $thumb_url = $image->largeimageurl;
                        
                    $image_url = $image->largeimageurl;
                    if($image_url == '')
                        $image_url = $image->mediumimageurl;
                    if($image_url == '')
                        $image_url = $image->smallimageurl;
                    
                    $title = $myproduct->title;
                    
                    $classes = array( 'zoom' );
        
        			if ( $loop === 0 || $loop % $columns === 0 ) {
        				$classes[] = 'first';
        			}
        
        			if ( ( $loop + 1 ) % $columns === 0 ) {
        				$classes[] = 'last';
        			}
        
        			$image_class = implode( ' ', $classes );
        			
        			
        			
        			$props = array();
        			
        			echo apply_filters(
        				'woocommerce_single_product_image_thumbnail_html',
        				sprintf(
        					'<a href="%s" class="%s" title="%s" data-rel="prettyPhoto[product-gallery]">%s</a>',
        					esc_url( $image_url ),
        					esc_attr( $image_class ),
        					esc_attr( $title ),
        					$this->get_external_image($thumb_url, $title, apply_filters( 'single_product_small_thumbnail_size', 'shop_thumbnail'), false, $props)
        				),
        				'atkp-'.$loop,
        				$prdid,
        				esc_attr( $image_class )
        			);
        
        			$loop++; 
                }
                $html .= '</div>';
                echo $html;
            }
            
        }
        
        function get_external_image($image_url, $title, $size = 'thumbnail', $icon = false, $attr = '') {
            $html = '';
            
            $width = 150;
            $height = 150;
            
            $src = $image_url;
            //list($src, $width, $height) = $image_url;
            $hwstring = image_hwstring($width, $height);
            $size_class = $size;
            if ( is_array( $size_class ) ) {
                $size_class = join( 'x', $size_class );
            }
            
            $default_attr = array(
                'src'   => $src,
                'class' => "attachment-$size_class size-$size_class",
                'alt'   => trim( strip_tags( $title ) ),
                'style' => 'display:initial;width:150px;height:150px'
            );
     
            $attr = wp_parse_args( $attr, $default_attr );
          
            /**
             * Filters the list of attachment image attributes.
             *
             * @since 2.8.0
             *
             * @param array        $attr       Attributes for the image markup.
             * @param WP_Post      $attachment Image attachment post.
             * @param string|array $size       Requested size. Image size or array of width and height values
             *                                 (in that order). Default 'thumbnail'.
             */
            $attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, 'atkp', $size );
            $attr = array_map( 'esc_attr', $attr );
            $html = rtrim("<img $hwstring");
            foreach ( $attr as $name => $value ) {
                $html .= " $name=" . '"' . $value . '"';
            }
            $html .= ' />';
            
         
            return $html;
        }
        
        public function get_external_properties($attachment_id) {
            $prdid = $this->get_productid();
        	
        	if($attachment_id == '_atkp') {        	
            	$props['alt'] = $props['caption'] = $props['title'] = ATKPTools::get_post_setting( $prdid, ATKP_PRODUCT_POSTTYPE.'_title');
            	$props['url']  = $this->get_imageurl('','',$prdid);
        	} else {
        	    //subimage
        	    $props['alt'] =$props['caption'] = $props['title'] = ATKPTools::get_post_setting( $prdid, ATKP_PRODUCT_POSTTYPE.'_title');
            	$props['url']  = $this->get_imageurl('','',$prdid);
        	    
        	}
    	    return $props;   
        }
        
        function woocommerce_single_product_image_thumbnail_html( $sprintf, $attachment_id, $post_id, $attr ) { 
            if(strlen($attachment_id) >=5 && substr($attachment_id, 0, 5) ==  '_atkp') {
                //echo 'xx:'.serialize(substr($attachment_id, 6));
                
                $html  = '<figure data-thumb="' . substr($attachment_id, 6) . '" class="woocommerce-product-gallery__image">';
        		//$html .= substr($attachment_id, 6);//wp_get_attachment_image( $attachment_id, 'shop_single', false, $attributes );
         		$class ='';
         		if (isset($attr['class'])) {
        			$class .= $attr['class'];
            	}
        
        		$style = isset($attr['style']) ? 'style="' . $attr['style'] . '" ' : null;
        
        		$html .= sprintf('<img src="%s" %s' . 'class="%s " '. 'alt="%s" />', esc_attr(substr($attachment_id, 6)), $style, $class, esc_attr('xx'));
        
         		
         		
         		$html .= '</figure>';
         		
         		$sprintf = $html;
            }
            
            return $sprintf; 
        }
        
        public function woocommerce_product_gallery_attachment_ids($images, $product) {
            
            $prdid = $this->get_productid($product->id);
            
            //echo serialize($prdid);exit;

            //TODO: css attribute von woo holen und mitgeben
            $myproduct= atkp_product::load($prdid);       
            
            $idx = 0;
            if(is_array($myproduct->images)) {
                foreach($myproduct->images as $image) {
                                        
                    array_push($images, '_atkp_'.$idx);
                    
                    $idx += 1;
                }
            }
            
            return $images;
        }
        
        public function set_external_postimage($post_id) {
		        $external_thumbnail = $this->has_external_thumbnail($post_id);
		        $wordpress_thumbnail = get_post_meta($post_id, '_thumbnail_id', true);

		        if ($external_thumbnail && !$wordpress_thumbnail) {
		          update_post_meta($post_id, '_thumbnail_id', '_atkp');
		        }

		        if (!$external_thumbnail && $wordpress_thumbnail == '_atkp') {
		          delete_post_meta($post_id, '_thumbnail_id');
		        }

        }
        
        public function post_thumbnail_html($html, $post_id, $post_image_id, $size, $attr) {
            $wordpress_thumbnail = get_post_meta($post_id, '_thumbnail_id', true);
            
            //nur das externe bild anzeigen wenn es auch wirklich eines ist!
            if($wordpress_thumbnail != '_atkp') {
                return $html;   
            } else if ($this->has_external_thumbnail($post_id)) {
    			$html = $this->get_external_thumbnail($post_id, $size, $attr);
    		}
    
    		return $html;
    	}

        public function has_external_thumbnail($post_id = null) {
    		$thumbnail = $this->get_productid($post_id);
    
    		if (!$thumbnail || $thumbnail== '') {
    			return false;
    		} else {
    			return true;
    		}
    	}
    	    	
    	public function get_productid($post_id = null) {
    		$post_id = (null === $post_id) ? get_the_ID() : $post_id;
            
            //prüfen ob atkp-produkt dann image holen
            //prüfen ob woocommerce-produkt dann image holen
            //prüfen ob hauptprodukt?
            //überprüfen ob aktiviert
                        
            $posttype = get_post_type($post_id);
            
            if($posttype == ATKP_PRODUCT_POSTTYPE) {
                //at-product                
                $importProductimage =atkp_options::$loader->get_product_importimagemode();
                
                if($importProductimage != 2)
                    return false;
                
            } else if($posttype == 'product') {
                //woocommerce
                 //INFO: Auch in external_featuredimage in verwendung
                $eanfield = atkp_options::$loader->get_woo_ean_field();
                $keytype = atkp_options::$loader->get_woo_keytype();
                
                if($eanfield == '' || $eanfield == 'sku')
                    $ean =  ATKPTools::get_post_setting( $post_id, '_sku'); 
                else
                    $ean = ATKPTools::get_post_setting( $post_id, $eanfield);

                    
                if($keytype == 'id') {
                    $exists = atkp_product::exists($ean);
                    
                    if($exists)
                        $post_id = $ean;
                    else
                        return false;
                }
                else
                    $post_id =  atkp_product::idbyean($ean);
            } 
            
            return $post_id;            
    	}
    
    	public function get_external_thumbnail($post_id = null, $size = false, $attr = array()) {
    		global $_wp_additional_image_sizes;
        
            $class ='';    
    
            $width = 0;
            $height = 0;
    
    		if (is_array($size)) {
    			$width = $size[0];
    			$height = $size[1];
    		} else if (isset($_wp_additional_image_sizes[$size])) {
    			$width = $_wp_additional_image_sizes[$size]['width'];
    			$height = $_wp_additional_image_sizes[$size]['height'];
    			$class = 'attachment-' . $size . ' ';
    		}
   
            $imageurl = '';
            $title = '';

            $prdid = $this->get_productid($post_id);
    		    $title = ATKPTools::get_post_setting( $prdid, ATKP_PRODUCT_POSTTYPE.'_title');

            $imageurl = $this->get_imageurl($width, $height, $prdid);

            if($imageurl == '')
                return false;

					    $redirtype = ATKPTools::get_setting( ATKP_PLUGIN_PREFIX . '_product_imagetype', 0 );

					    switch ( $redirtype ) {
							    default:
									    //disabled
									    break;
							    case 2:
							    case 3:
									    $outfile = plugins_url( '/tools/atkp_imagereceiver.php', ATKP_PLUGIN_FILE );

									    $imageurl = $outfile . '?image=' . rawurlencode( base64_encode( $imageurl ) );
									    break;
					    }


            if (isset($attr['class'])) {
        			$class .= $attr['class'];
        	}
    
    		$style = isset($attr['style']) ? 'style="' . $attr['style'] . '" ' : null;
    
    		//if (is_feed()) {
    		//	$html = sprintf('<img src="%s" %s' . 'class="%s wp-post-image" '. 'alt="%s" />', esc_attr($imageurl), $style, $additional_classes, $title);
    		//} else {
    			$html = sprintf('<img src="%s" %s' . 'class="%s wp-post-image" '. 'alt="%s" />', esc_attr($imageurl), $style, $class, esc_attr($title));
    		//}
    
    		return $html;
    	}
    	
    	public function get_imageurl($width, $height, $prdid) {
    	    if(($width == '' || $width == 0 || $width >= 600) && ($height == '' || $height == 0 || $height >= 600)) {
			        $imageurl = atkp_product::get_mainimage($prdid, 'largetosmall');
            }else {
			        $imageurl = atkp_product::get_mainimage($prdid, 'mediumtolarge');
            }
            
            return $imageurl;
    	}
    

    }