import Canvas from '../src/Canvas.js';
import Image from '../src/Image.js';
import Manifest from '../src/Manifest.js';
import Common from '../src/common.js';
/**
 * Generate a canvas object to serve
 * @todo Use createCanvas from Common?
 * @todo Pass a Manifest object, not a manifest id
 * @param {string} manifestId The corresponding manifest's id
 * @param {number|string} name The canvas name 
 */
export default async function generateCanvas(manifestId, name) {
	const IIIF_API_VERSION = process.env.IIIF_API_VERSION;
	const BASE_URL = process.env.BASE_URL;

	const canvas = new Canvas(IIIF_API_VERSION, BASE_URL);
	const manifest = new Manifest(IIIF_API_VERSION, BASE_URL);
	manifest.generateID(manifestId);

	canvas.generateID(manifestId, name);
	let label = name
		.replace(/c(\w{1,2})0+(\d+).*(\.\w{2,3})?$/i, function (str, c, number) {
			return `C${c}. ${number}`;
		});
	// Add PCA to canvas label for HSI images
	if (manifest.technique === 'hsi') {
		label += ` ${filename.split('_')[3].replace(/\..*$/,'')}`;
	}
	canvas.label = label;

	const image = new Image(canvas.id);
	image.generateID(process.env.IMAGE_SERVER_URL, await Common.getImageName(canvas));
	const imgSize = await Common.getImageSize(image.id);
	image.setSize(imgSize.height, imgSize.width);

	canvas.setThumbnail(
		imgSize.thumb.height,
		imgSize.thumb.width,
		image.id
	);

	canvas.addImage(image);

    return canvas.toObject();
}