import * as Discord from 'discord.js';
import { BotCommand } from 'psyduck-contracts';
import commandLineArgs from 'command-line-args';

const optionsDefinition = [
    { name: 'verbose', alias: 'v', type: Boolean },
    { name: 'command', alias: 'c', type: String }
];

export class HelpCommand implements BotCommand {
    public commandCodes: Array<string>;
    public commandPrefix: string;
    private userDefinedHelpCode?: string;
    constructor(userDefinedHelpCode?: string) {
        this.commandPrefix = '!';
        this.commandCodes = ['help', 'h'];
        this.userDefinedHelpCode = userDefinedHelpCode;
    }

    executeCommand(message: Discord.Message, parameters: string[]) {
        const options = commandLineArgs(optionsDefinition, { argv: parameters.map(p => p.trim()), partial: true });
        if (options.verbose) {
            const embed = {
                'description': 'Hey! I heard you needed some help. Check out the commands below to see what I can do.',
                'url': 'https://github.com/galactic0wl/psyduck',
                'color': 10347089,
                'author': {
                  'name': 'Psyduck',
                  'url': 'https://github.com/galactic0wl/psyduck',
                  'icon_url': 'https://s3-us-west-2.amazonaws.com/psyduck-assets/assets/psyduck.png'
                },
                'fields': [
                  {
                    'name': 'Help',
                    'value': '```css\nRecognized Codes: [\'h\', \'help\']\nParameters:[verbose, v], [command, c]\nExamples:\n !help -v\n !help --verbose\n !help -c about```'
                  }
                ]
              };
              message.channel.send({embed});
            if (this.userDefinedHelpCode) {
                message.channel.send(`In addition, you can run \`!${this.userDefinedHelpCode}\` to view additional commands.`);
            }
        } else {
            if (options.command) {
            } else {
                message.channel.send('Verbose set to false requires a command. Try again with `!help -c <command>` or `!help -v` for a list of all default commands.');
            }
            if (this.userDefinedHelpCode) {
                message.channel.send(`In addition, you can run \`!${this.userDefinedHelpCode}\` to view additional commands.`);
            }
        }
    }
}