import Chalk from 'chalk';
const log = console.log;

import * as Discord from 'discord.js';
import { BotCommand, BotPlugin } from 'psyduck-contracts';

export const CommandRegistry = new Map<string, BotCommand>();
export default class CommandHandler implements BotPlugin {
    constructor() {
    }
    onMessage(message: Discord.Message) {
        if (message.author.bot) {
            return;
        }
        if (message.content.length <= 1) {
            return;
        }
        const dupe = RegExp(/^(.)\1*$/gm);
        if (dupe.test(message.content)) {
            return;
        }
        const commandArgs = message.content.slice().split(' ');
        const commandCode = commandArgs.shift() || '';
        const command = CommandRegistry.get(commandCode);
        if (command) {
            log(Chalk.black.bgGreen(`Executing command [${Chalk.white(commandCode)}]`));
            const parameters = message.content.match(/ (?=\S)[^"\s]*(?:"[^\\"]*(?:\\[\s\S][^\\"]*)*"[^"\s]*)*/g) || [];
            command.executeCommand(message, parameters);
        }
    }
    registerCommand(command: BotCommand) {
        command.commandCodes.forEach(code => {
            const key = `${command.commandPrefix}${code}`;
            CommandRegistry.set(key, command);
            log(Chalk.black.bgCyan(`Command registered - Code ${Chalk.white(key)}`));
        });
    }
}