'use strict';

const config = require('config');
const { makeExtendSchemaPlugin, gql } = require('graphile-utils');

const schemaExtender = makeExtendSchemaPlugin((_build) => ({
	typeDefs: gql`
      extend type Media {
        thumbnailWidth: Int @requires(columns: ["width", "height"])
        thumbnailHeight: Int @requires(columns: ["height", "width"])
      }
    `,
	resolvers: {
		Media: {
			thumbnailWidth(parent, _args, _context, _info) {
				if (!parent.width || !parent.height) {
					return null;
				}

				if (parent.height <= config.media.thumbnailSize) {
					// thumbnails aren't upscaled
					return parent.width;
				}

				return Math.round(parent.width / (parent.height / config.media.thumbnailSize));
			},
			thumbnailHeight(parent, _args, _context, _info) {
				if (!parent.width || !parent.height) {
					return null;
				}

				if (parent.height <= config.media.thumbnailSize) {
					// thumbnails aren't upscaled
					return parent.height;
				}

				return config.media.thumbnailSize;
			},
		},
	},
}));

module.exports = [schemaExtender];