const { Command } = require('../../../../interfaces/');

class CommandsCommand extends Command {

    constructor(client) {

        super(client, {
            name: 'commands',
            module: 'information',
            aliases: [
                'cmd',
                'cmds',
                'command'
            ],
            clientPermissions: ['SEND_MESSAGES', 'EMBED_LINKS'],
            usage: '[module]',
            arguments: [
                // {
                //     name: 'user',
                //     type: 'BOOLEAN',
                //     types: ['VERBAL', 'FLAG'],
                //     default: true
                // },
            ]
        });

        this.client = client;

    }

    async execute(message, { params }) {
        
        if (!params.length) return this._listCommands(message);
        
        params = params.join(' ');

        const [ mod ] = this.client.resolver.components(params, 'module', false);
        if (!mod) {
            const [ command ] = this.client.resolver.components(params, 'command', false);
            if (!command) return message.format('C_COMMAND_INVALID');
            return message.embed(command.usageEmbed(message, true));
        }
        //list module's commands

        const commands = mod.components.filter((c) => c.type === 'command');
        let text = '';

        for(const command of commands.values()) {
            text += command.disabled ? `~~${command.name}~~\n` : `${command.name}\n`; //TODO: Denote disabled commands somehow
        }

        const embed = {
            author: {
                name: message.format('C_COMMANDS_TITLE'),
                icon_url: this.client.user.avatarURL() //eslint-disable-line camelcase
            },
            description: `${message.format('C_COMMANDS')}\n${message.format('C_COMMANDS_TEMPLATE', { mod: mod.name, text })}`,
            footer: {
                text: message.format('C_COMMANDS_FOOTER')
            }
        };

        return message.embed(embed);
        
    }

    _listCommands(message) {

        const fields = [];
        const sortedModules = this.client.registry.components
            .filter((c) => c.type === 'module')
            .sort((a, b) => {
                const filter = (c) => c.type === 'command';
                return b.components.filter(filter).size - a.components.filter(filter).size;
            });

        for (const mod of sortedModules.values()) {
            const field = {
                name: mod.id,
                value: '',
                inline: true
            };

            for (const command of mod.components.values()) {
                if (command.type !== 'command'
                    || command.restricted && !this.client._options.bot.owners.includes(message.author.id)
                    || !command.archivable) continue;
                field.value += command.disabled ? `~~${command.name}~~\n` : `${command.name}`;
            }
            if (field.value) fields.push(field);
        }

        const embed = {
            author: {
                name: message.format('C_COMMANDS_TITLE'),
                icon_url: this.client.user.avatarURL() //eslint-disable-line camelcase
            },
            description: message.format('C_COMMANDS'),
            fields,
            footer: {
                text: message.format('C_COMMANDS_FOOTER')
            }
        };

        return message.embed(embed);
        
    }

}

module.exports = CommandsCommand;