"use strict";

const handlers = new Map();

function register(type, handler) {
    handlers.set(type, handler);
}

function handle(client, message) {
    const { type } = message;
    
    if (!type) {
        return { status: 'fail', message: 'MISSING_TYPE' };
    }
    
    const handler = handlers.get(type);
    
    if (!handler) {
        return { status: 'fail', message: 'UNKNOWN_TYPE' };
    }
    
    try {
        const result = handler(client, message);
        return result;
    } catch (error) {
        console.error(`Handler error [${type}]:`, error);
        return { status: 'fail', message: 'HANDLER_ERROR', error: error.message };
    }
}

function unregister(type) {
    handlers.delete(type);
}

function clear() {
    handlers.clear();
}

function hasHandler(type) {
    return handlers.has(type);
}

function listHandlers() {
    return [...handlers.keys()];
}

module.exports = {
    register,
    handle,
    unregister,
    clear,
    hasHandler,
    listHandlers
};