<?php
/**
 * CMB file field type
 *
 * @since  2.2.2
 *
 * @category  WordPress_Plugin
 * @package   CMB2
 * @author    CMB2 team
 * @license   GPL-2.0+
 * @link      https://cmb2.io
 */
class CMB2_Type_File extends CMB2_Type_File_Base {

	/**
	 * Handles outputting an 'file' field
	 *
	 * @param  array $args Override arguments
	 * @return string      Form input element
	 */
	public function render( $args = array() ) {
		$args    = empty( $args ) ? $this->args : $args;
		$field   = $this->field;
		$options = (array) $field->options();

		$a = $this->args = $this->parse_args( 'file', array(
			'class'           => 'cmb2-upload-file regular-text',
			'id'              => $this->_id(),
			'name'            => $this->_name(),
			'value'           => $field->escaped_value(),
			'id_value'        => null,
			'desc'            => $this->_desc( true ),
			'size'            => 45,
			'js_dependencies' => 'media-editor',
			'preview_size'    => $field->args( 'preview_size' ),
			'query_args'      => $field->args( 'query_args' ),

			// if options array and 'url' => false, then hide the url field
			'type'            => array_key_exists( 'url', $options ) && false === $options['url']
				? 'hidden'
				: 'text',
		), $args );

		// get an array of image size meta data, fallback to 'large'
		$this->args['img_size_data'] = $img_size_data = parent::get_image_size_data(
			$a['preview_size'],
			'large'
		);

		$output = '';

		$output .= parent::render( array(
			'type'  => $a['type'],
			'class' => $a['class'],
			'value' => $a['value'],
			'id'    => $a['id'],
			'name'  => $a['name'],
			'size'  => $a['size'],
			'desc'  => '',
			'data-previewsize' => sprintf( '[%d,%d]', $img_size_data['width'], $img_size_data['height'] ),
			'data-sizename'    => $img_size_data['name'],
			'data-queryargs'   => ! empty( $a['query_args'] ) ? json_encode( $a['query_args'] ) : '',
			'js_dependencies'  => $a['js_dependencies'],
		) );

		// Now remove the data-iterator attribute if it exists.
		// (Possible if being used within a custom field)
		// This is not elegant, but compensates for CMB2_Types::_id
		// automagically & inelegantly adding the data-iterator attribute.
		// Single responsibility principle? pffft
		$parts = explode( '"', $this->args['id'] );
		$this->args['id'] = $parts[0];

		$output .= sprintf(
			'<input class="cmb2-upload-button button-secondary" type="button" value="%1$s" />',
			esc_attr( $this->_text( 'add_upload_file_text', esc_html__( 'Add or Upload File', 'cmb2' ) ) )
		);

		$output .= $a['desc'];
		$output .= $this->get_id_field_output();

		$output .= '<div id="' . $field->id() . '-status" class="cmb2-media-status">';
		if ( ! empty( $a['value'] ) ) {
			$output .= $this->get_file_preview_output();
		}
		$output .= '</div>';

 		return $this->rendered( $output );
	}

	public function get_file_preview_output() {
		if ( ! $this->is_valid_img_ext( $this->args['value'] ) ) {

			return $this->file_status_output( array(
				'value'     => $this->args['value'],
				'tag'       => 'div',
				'cached_id' => $this->args['id'],
			) );
		}

		if ( $this->args['id_value'] ) {
			$image = wp_get_attachment_image( $this->args['id_value'], $this->args['preview_size'], null, array(
				'class' => 'cmb-file-field-image',
			) );
		} else {
			$image = '<img style="max-width: ' . absint( $this->args['img_size_data']['width'] ) . 'px; width: 100%;" src="' . $this->args['value'] . '" class="cmb-file-field-image" alt="" />';
		}

		return $this->img_status_output( array(
			'image'     => $image,
			'tag'       => 'div',
			'cached_id' => $this->args['id'],
		) );
	}

	public function get_id_field_output() {
		$field = $this->field;

		/*
		 * A little bit of magic (tsk tsk) replacing the $this->types->field object,
		 * So that the render function is using the proper field object.
		 */
		$this->types->field = $this->get_id_field();

		$output = parent::render( array(
			'type'  => 'hidden',
			'class' => 'cmb2-upload-file-id',
			'value' => $this->types->field->value,
			'desc'  => '',
		) );

		// We need to put the original field object back
		// or other fields in a custom field will be broken.
		$this->types->field = $field;

		return $output;
	}

	public function get_id_field() {

		// reset field args for attachment id
		$args = array(
			// if we're looking at a file in a group, we need to get the non-prefixed id
			'id' => ( $this->field->group ? $this->field->args( '_id' ) : $this->args['id'] ) . '_id',
		);

		// and get new field object
		// (need to set it to the types field property)
		$id_field = $this->field->get_field_clone( $args );

		$id_value = absint( null !== $this->args['id_value'] ? $this->args['id_value'] : $id_field->escaped_value() );

		// we don't want to output "0" as a value.
		if ( ! $id_value ) {
			$id_value = '';
		}

		// if there is no id saved yet, try to get it from the url
		if ( $this->args['value'] && ! $id_value ) {
			$id_value = cmb2_utils::image_id_from_url( esc_url_raw( $this->args['value'] ) );
		}

		$id_field->value = $id_value;

		return $id_field;
	}

}
