<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}
if ( ! class_exists( 'Ascend_Get_Image' ) ) {
	class Ascend_Get_Image {
		/**
		 * The singleton instance
		 */
		private static $instance = null;
		/**
		 * No initialization allowed
		 */
		private function __construct() {}

		/**
		 * No cloning allowed
		 */
		private function __clone() {}

		public static function getInstance() {
			if ( self::$instance == null ) {
				self::$instance = new self();
			}

			return self::$instance;
		}

		public function process( $id = null, $width = null, $height = null ) {
			// return if no ID
			if ( empty( $id ) ) {
				return false;
			}
			// return with orginal if no width or height set.
			if ( empty( $width ) && empty( $height ) ) {
				return self::ascend_get_full_image( $id );
			}
			// Find width or height if one or the other is not set.
			$org_height = true;
			if ( empty( $height ) ) {
				$org_height = false;
				$image_attributes = wp_get_attachment_image_src( $id, 'full' );
				$sizes = image_resize_dimensions( $image_attributes[1], $image_attributes[2], $width, null, false );
				$height = $sizes[5];
			} else if ( empty( $width ) ) {
				$image_attributes = wp_get_attachment_image_src( $id, 'full' );
				$sizes = image_resize_dimensions( $image_attributes[1], $image_attributes[2], null, $height, false );
				$width = $sizes[4];
			}
			// Now we checked for an ID, made sure the width and height have values lets check if we can make the size at all
			if ( self::ascend_image_size_larger_than_original( $id, $width, $height ) ) {
				return self::ascend_get_full_image( $id );
			}
			// Check for jetpack
			if ( class_exists( 'Jetpack' ) && Jetpack::is_module_active( 'photon' ) ) {
				$args = array( 'resize' => $width . ',' . $height );
				$image_url = wp_get_attachment_image_url( $id, 'full' );
				return array(
					0 => jetpack_photon_url( $image_url, $args ),
					1 => $width,
					2 => $height,
					3 => self::ascend_get_srcset_output( $id, $image_url, $width, $height ),
					4 => $image_url,
					5 => $id,
				);
			} else if ( self::ascend_image_size_already_exists( $id, $width, $height ) ) {

					return self::ascend_get_image_at_size( $id, $width, $height );

			} else if ( class_exists( 'Kadence_Image_Processing' ) ) {
				// lets process the image
				$Kadence_Image_Processing = Kadence_Image_Processing::getInstance();
				$created = $Kadence_Image_Processing->process( $id, $width, $height );
				if ( $created ) {
					return self::ascend_get_image_at_size( $id, $width, $height );
				} else {
					return self::ascend_get_full_image( $id );
				}
			} else {
				// get the next best thing
				if ( 800 < $width ) {
					// Large image
					return self::ascend_get_full_image( $id );
				} else if ( $org_height ) {
					// custom_ratio
					if ( $width == $height ) {
						// square
						if ( 150 >= $width ) {
							// Thumbnail
							return self::ascend_get_image_at_size( $id, 150, 150 );
						} else {
							// Ascend 600x600
							return self::ascend_get_image_at_size( $id, 600, 600 );
						}
					} else if ( 310 == $height && 270 == $width ) {
						return self::ascend_get_image_at_size( $id, 540, 620 );
					} else if ( ( $width / $height ) == 1.5 ) {
						return self::ascend_get_image_at_size( $id, 720, 480 );
					} else {
						return self::ascend_get_full_image( $id );
					}
				} else {
					// Orginal ratio
					if ( 300 >= $width ) {
						return self::ascend_get_image_at_size_name( $id, 'medium' );
					} elseif ( 800 > $width ) {
						return self::ascend_get_image_at_size_name( $id, 'large' );
					} else {
						return self::ascend_get_full_image( $id );
					}
				}
			}
		}
		public static function ascend_get_image_srcset( $id = null, $url = null, $width = null, $height = null ) {
			if ( empty( $id ) || empty( $url ) || empty( $width ) || empty( $height ) ) {
				return false;
			}

			$image_meta = self::ascend_get_image_meta( $id );
			if ( ! $image_meta ) {
				return false;
			}

			if ( function_exists( 'wp_calculate_image_srcset' ) ) {
				$output = wp_calculate_image_srcset( array( $width, $height ), $url, $image_meta, $id );
			} else {
				$output = '';
			}

			return $output;
		}
		public static function ascend_get_srcset_output( $id = null, $url = null, $width = null, $height = null ) {
			$img_srcset = self::ascend_get_image_srcset( $id, $url, $width, $height );
			if ( ! empty( $img_srcset ) ) {
				$output = 'srcset="' . esc_attr( $img_srcset ) . '" sizes="(max-width: ' . esc_attr( $width ) . 'px) 100vw, ' . esc_attr( $width ) . 'px"';
			} else {
				$output = '';
			}
			return $output;
		}
		public static function ascend_image_size_larger_than_original( $id, $width, $height ) {
				$image_meta = self::ascend_get_image_meta( $id );

			if ( ! isset( $image_meta['width'] ) || ! isset( $image_meta['height'] ) ) {
				return true;
			}
			if ( $width > $image_meta['width'] || $height > $image_meta['height'] ) {
				return true;
			}

				return false;
		}
		public static function ascend_get_full_image( $id ) {
				$src = wp_get_attachment_image_src( $id, 'full' );
				// array return.
				$image = array(
					0 => $src[0],
					1 => $src[1],
					2 => $src[2],
					3 => self::ascend_get_srcset_output( $id, $src[0], $src[1], $src[2] ),
					4 => $src[0],
					5 => $id,
				);
				return $image;
		}
		public static function ascend_get_image_at_size( $id, $width, $height ) {
				$size = array(
					0 => $width,
					1 => $height,
				);
				$src = wp_get_attachment_image_src( $id, $size );
				$full = wp_get_attachment_image_url( $id, 'full' );
				// array return.
				$image = array(
					0 => $src[0],
					1 => $src[1],
					2 => $src[2],
					3 => self::ascend_get_srcset_output( $id, $src[0], $src[1], $src[2] ),
					4 => $full,
					5 => $id,
				);
				return $image;
		}
		public static function ascend_get_image_at_size_name( $id, $size ) {
				$src = wp_get_attachment_image_src( $id, $size );
				$full = wp_get_attachment_image_url( $id, 'full' );
				// array return.
				$image = array(
					0 => $src[0],
					1 => $src[1],
					2 => $src[2],
					3 => self::ascend_get_srcset_output( $id, $src[0], $src[1], $src[2] ),
					4 => $full,
					5 => $id,
				);
				return $image;
		}
		public static function ascend_get_image_meta( $id ) {
			return wp_get_attachment_metadata( $id );
		}
		public static function ascend_image_size_already_exists( $id, $width, $height ) {
			$image_meta = self::ascend_get_image_meta( $id );
			$ascend_size_name = self::ascend_get_size_name( array( $width, $height ) );
			$kip_size_name = self::kip_get_size_name( array( $width, $height ) );
			if ( isset( $image_meta['sizes'][ $ascend_size_name ] ) || isset( $image_meta['sizes'][ $kip_size_name ] ) ) {
				return true;
			} else {
				return false;
			}
		}
		public static function ascend_get_size_name( $size ) {
			return 'ascend-' . $size[0] . 'x' . $size[1];
		}
		public static function kip_get_size_name( $size ) {
			return 'kip-' . $size[0] . 'x' . $size[1];
		}
	}
}