/**
 * Help module
 */

let { AbstractModule } = require('./abstract');
let { logger } = require('../logging');

class HelpModule extends AbstractModule {
    constructor(commandMap) {
        super(
            "Help",
            "Provide helpful information about other modules.",
            "help"
        );
        this.commandMap = commandMap;
    }

    addCommand(command, module) {
        logger.debug("Adding help for command %s against module %s", command, module.name);
        this.commands.push(command);
    }

    help() {
        let help = `!help <command>`;
        for (let command of Array.from(this.commandMap.keys()).sort()) {
            help += "\n!help " + command + " : " + this.commandMap.get(command).description;
        }
        return help;
    }
}

function create(commandMap) {
    return new HelpModule(commandMap);
}

exports.create = create;
exports.module = new HelpModule();