import { iconGenerator } from "../renderer/iconGenerator";
import { isValidHash, computeHash } from "../common/hashUtils";
import { CanvasRenderer } from "../renderer/canvas/canvasRenderer";
import { IS_RENDERED_PROPERTY } from "../common/dom";

/**
 * Draws an identicon to a context.
 * @param {CanvasRenderingContext2D} ctx - Canvas context on which the icon will be drawn at location (0, 0).
 * @param {*} hashOrValue - A hexadecimal hash string or any value that will be hashed by Jdenticon.
 * @param {number} size - Icon size in pixels.
 * @param {Object|number=} config - Optional configuration. If specified, this configuration object overrides any
 *    global configuration in its entirety. For backward compatibility a padding value in the range [0.0, 0.5) can be
 *    specified in place of a configuration object.
 */
export function drawIcon(ctx, hashOrValue, size, config) {
    if (!ctx) {
        throw new Error("No canvas specified.");
    }
    
    iconGenerator(new CanvasRenderer(ctx, size), 
        isValidHash(hashOrValue) || computeHash(hashOrValue), 
        config);

    const canvas = ctx.canvas;
    if (canvas) {
        canvas[IS_RENDERED_PROPERTY] = true;
    }
}