import { hasAnchor } from './identity.js';

/**
 * Recursively convert any node or its contents to native JavaScript
 *
 * @param value - The input value
 * @param arg - If `value` defines a `toJSON()` method, use this
 *   as its first argument
 * @param ctx - Conversion context, originally set in Document#toJS(). If
 *   `{ keep: true }` is not set, output should be suitable for JSON
 *   stringification.
 */
function toJS(value, arg, ctx) {
    // eslint-disable-next-line @typescript-eslint/no-unsafe-return
    if (Array.isArray(value))
        return value.map((v, i) => toJS(v, String(i), ctx));
    if (value && typeof value.toJSON === 'function') {
        // eslint-disable-next-line @typescript-eslint/no-unsafe-call
        if (!ctx || !hasAnchor(value))
            return value.toJSON(arg, ctx);
        const data = { aliasCount: 0, count: 1, res: undefined };
        ctx.anchors.set(value, data);
        ctx.onCreate = res => {
            data.res = res;
            delete ctx.onCreate;
        };
        const res = value.toJSON(arg, ctx);
        if (ctx.onCreate)
            ctx.onCreate(res);
        return res;
    }
    if (typeof value === 'bigint' && !ctx?.keep)
        return Number(value);
    return value;
}

export { toJS };