import { domainOf } from "./domain.js";
import { throwInternalError } from "./errors.js";
import { isomorphic } from "./isomorphic.js";
import { FileConstructor, objectKindOf } from "./objectKinds.js";
// Eventually we can just import from package.json in the source itself
// but for now, import assertions are too unstable and it wouldn't support
// recent node versions (https://nodejs.org/api/esm.html#json-modules).
// For now, we assert this matches the package.json version via a unit test.
export const arkUtilVersion = "0.56.0";
export const initialRegistryContents = {
    version: arkUtilVersion,
    filename: isomorphic.fileName(),
    FileConstructor
};
export const registry = initialRegistryContents;
const namesByResolution = new Map();
const nameCounts = Object.create(null);
export const register = (value) => {
    const existingName = namesByResolution.get(value);
    if (existingName)
        return existingName;
    let name = baseNameFor(value);
    if (nameCounts[name])
        name = `${name}${nameCounts[name]++}`;
    else
        nameCounts[name] = 1;
    registry[name] = value;
    namesByResolution.set(value, name);
    return name;
};
export const isDotAccessible = (keyName) => /^[$A-Z_a-z][\w$]*$/.test(keyName);
const baseNameFor = (value) => {
    switch (typeof value) {
        case "object": {
            if (value === null)
                break;
            const prefix = objectKindOf(value) ?? "object";
            // convert to camelCase
            return prefix[0].toLowerCase() + prefix.slice(1);
        }
        case "function":
            return isDotAccessible(value.name) ? value.name : "fn";
        case "symbol":
            return value.description && isDotAccessible(value.description) ?
                value.description
                : "symbol";
    }
    return throwInternalError(`Unexpected attempt to register serializable value of type ${domainOf(value)}`);
};