<?php

class TimberImage extends TimberPost implements TimberCoreInterface {

	public $_can_edit;
	public $_dimensions;
	public $abs_url;
	public $PostClass = 'TimberPost';
	public $object_type = 'image';

	public static $representation = 'image';

	public $file_loc;
	public $file;
	public $sizes = array();
	public $post_parent;
	public $caption;
	public $_wp_attached_file;

	/**
	 * @param int $iid
	 */
	function __construct($iid) {
		$this->init($iid);
	}

	/**
	 * @return string|null
	 */
	function __toString() {
		if ($this->get_src()) {
			return $this->get_src();
		}
	}

	/**
	 * @return mixed
	 */
	function get_pathinfo() {
		return pathinfo($this->file);
	}

	/**
	 * @param string $dim
	 * @return array|int
	 */
	function get_dimensions($dim = null) {
		if (isset($this->_dimensions)) {
			return $this->get_dimensions_loaded($dim);
		}
		list($width, $height) = getimagesize($this->file_loc);
		$this->_dimensions = array();
		$this->_dimensions[0] = $width;
		$this->_dimensions[1] = $height;
		return $this->get_dimensions_loaded($dim);
	}

	/**
	 * @param string|null $dim
	 * @return array|int
	 */
	protected function get_dimensions_loaded($dim) {
		if ($dim === null) {
			return $this->_dimensions;
		}
		if ($dim == 'w' || $dim == 'width') {
			return $this->_dimensions[0];
		}
		if ($dim == 'h' || $dim == 'height') {
			return $this->_dimensions[1];
		}
		return null;
	}

	/**
	 * @return int
	 */
	function get_width() {
		return $this->get_dimensions('width');
	}

	/**
	 * @return int
	 */
	function get_height() {
		return $this->get_dimensions('height');
	}

	/**
	 * @param string $size
	 * @return bool|string
	 */
	function get_src( $size = '' ) {
		if (isset($this->abs_url)) {
			return $this->_maybe_secure_url($this->abs_url);
		}

		if ($size && is_string($size) && isset($this->sizes[$size])) {
			$image = image_downsize($this->ID, $size);
			return $this->_maybe_secure_url(reset($image));
		}

		if (!isset($this->file) && isset($this->_wp_attached_file)) {
			$this->file = $this->_wp_attached_file;
		}

		if (!isset($this->file)) {
			return false;
		}

		$dir = self::wp_upload_dir();
		$base = ($dir["baseurl"]);

		$src = trailingslashit($this->_maybe_secure_url($base)) . $this->file;
		return apply_filters('timber_image_src', $src);
	}

	private static function _maybe_secure_url($url) {
		if (is_ssl() && strpos($url, 'https') !== 0 && strpos($url, 'http') === 0) {
			$url = 'https' . substr($url, strlen('http'));
		}

		return $url;
	}

	public static function wp_upload_dir() {
		static $wp_upload_dir = false;

		if (!$wp_upload_dir) {
			$wp_upload_dir = wp_upload_dir();
		}

		return $wp_upload_dir;
	}

	/**
	 * @return string
	 */
	function get_path() {
		if (strlen($this->abs_url)) {
			return $this->abs_url;
		}
		return get_permalink($this->ID);
	}

	/**
	 * @return bool|TimberImage
	 */
	function get_parent() {
		if (!$this->post_parent) {
			return false;
		}
		return new $this->PostClass($this->post_parent);
	}

	function get_alt() {
		$alt = trim(strip_tags(get_post_meta($this->ID, '_wp_attachment_image_alt', true)));
		return $alt;
	}


	/**
	 * @param int $iid
	 */
	function init( $iid = false ) {
		if ( !is_numeric( $iid ) && is_string( $iid ) ) {
			if (strstr($iid, '://')) {
				$this->init_with_url($iid);
				return;
			}
			if ( strstr($iid, ABSPATH) ) {
				$this->init_with_file_path($iid);
				return;
			}
			if (strstr(strtolower($iid), '.jpg')) {
				$this->init_with_relative_path($iid);
				return;
			}
		}

		$image_info = $this->get_image_info($iid);

		$this->import($image_info);
		$basedir = self::wp_upload_dir();
		$basedir = $basedir['basedir'];
		if (isset($this->file)) {
			$this->file_loc = $basedir . DIRECTORY_SEPARATOR . $this->file;
		} else if (isset($this->_wp_attached_file)) {
			$this->file = reset($this->_wp_attached_file);
			$this->file_loc = $basedir . DIRECTORY_SEPARATOR . $this->file;
		}
		if (isset($image_info['id'])) {
			$this->ID = $image_info['id'];
		} else if (is_numeric($iid)) {
			$this->ID = $iid;
		}
		if (isset($this->ID)) {
			$custom = get_post_custom($this->ID);
			foreach ($custom as $key => $value) {
				$this->$key = $value[0];
			}
		} else {
			if (is_array($iid) || is_object($iid)) {
				TimberHelper::error_log('Not able to init in TimberImage with iid=');
				TimberHelper::error_log($iid);
			} else {
				TimberHelper::error_log('Not able to init in TimberImage with iid=' . $iid);
			}
		}
	}

	private function get_image_info( $iid ) {
		$image_info = $iid;
		if (is_numeric($iid)) {
			$image_info = wp_get_attachment_metadata($iid);
			if (!is_array($image_info)) {
				$image_info = array();
			}
			$image_custom = get_post_custom($iid);
			$basic = get_post($iid);
			if ($basic) {
				if (isset($basic->post_excerpt)) {
					$this->caption = $basic->post_excerpt;
				}
				$image_custom = array_merge($image_custom, get_object_vars($basic));
			}
			return array_merge($image_info, $image_custom);
		}
		if (is_array($image_info) && isset($image_info['image'])) {
			return $image_info['image'];
		}
		if (is_object($image_info)) {
		   return get_object_vars($image_info);
		}
		return $iid;
	}

	private function init_with_relative_path( $relative_path ) {
		$this->abs_url = home_url( $relative_path );
		$file_path = TimberURLHelper::get_full_path( $relative_path );
		$this->file_loc = $file_path;
		$this->file = $file_path;
	}

	private function init_with_file_path( $file_path ) {
		$url = TimberURLHelper::file_system_to_url( $file_path );
		$this->abs_url = $url;
		$this->file_loc = $file_path;
		$this->file = $file_path;
	}

	/**
	 * @param string $url
	 */
	private function init_with_url($url) {
		$this->abs_url = $url;
		if (TimberURLHelper::is_local($url)) {
			$this->file = ABSPATH . TimberURLHelper::get_rel_url($url);
			$this->file_loc = ABSPATH . TimberURLHelper::get_rel_url($url);
		}
	}

	/**
	 * @deprecated; use src() instead
	 * @return string
	 */
	function get_url() {
		return $this->get_src();
	}

	/**
	 * @deprecated; use src() instead
	 * @return string
	 */
	function url() {
		return $this->get_src();
	}

	/* Alias */

	/**
	 * @return float
	 */
	public function aspect() {
		$w = intval($this->width());
		$h = intval($this->height());
		return $w / $h;
	}

	/**
	 * @return int
	 */
	public function height() {
		return $this->get_height();
	}

	/**
	 * @param string $size
	 * @return bool|string
	 */
	public function src($size = '') {
		return $this->get_src($size);
	}

	/**
	 * @return int
	 */
	public function width() {
		return $this->get_width();
	}

	/**
	 * @return string alt text stored in WordPress
	 */
	public function alt() {
		return $this->get_alt();
	}

}