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

class StatsCommand extends Command {

    constructor(client) {

        super(client, {
            name: 'about',
            module: 'developer',
            aliases: [
                'stats',
                'info'
            ],
            usage: '',
            restricted: true,
            arguments: [
                {
                    name: 'log',
                    type: 'BOOLEAN',
                    types: ['FLAG'],
                    description: 'Logs the output in the console.'
                }
            ],
            showUsage: false
        });

    }

    async execute(message, { params, args }) {

        // TODO:
        // Add some stuff that only shows when a dev runs the command, for instance amount of cached messages etc

        const { guild } = message;
        const { shard } = this.client;

        const evalFunc = (thisArg) => {
            return {
                users: thisArg.users.cache.size,
                guilds: thisArg.guilds.cache.size,
                channels: thisArg.channels.cache.size,
                memory: Math.floor(process.memoryUsage().heapUsed / 1024 / 1024),
                uptime: thisArg.uptime
            };
        };

        const mEvalFunc = (thisArg) => {
            return {
                memory: Math.floor(process.memoryUsage().heapUsed / 1024 / 1024),
                uptime: Date.now() - thisArg.readyAt
            };
        };

        const shardResults = await shard.broadcastEval(evalFunc).catch((error) => this.client.logger.error(error));
        const managerResult = await this.client.managerEval(`(${mEvalFunc})(this)`).catch((error) => this.client.logger.error(error));
        
        const descValues = {
            devs: await this.client.resolveUsers(this.client._options.bot.owners).then((owners) => {
                return owners.map((o) => o.tag).join(', ');
            }),
            uptime: this.client.resolver.timeAgo(Math.floor(managerResult.uptime/1000)),
            memory: managerResult.memory,
            shards: shard.count
        };

        const shardValues = {
            cachedUsers: this.client.users.cache.size,
            guilds: this.client.guilds.cache.size,
            channels: this.client.channels.cache.size,
            uptime: this.client.resolver.timeAgo(Math.floor(this.client.uptime/1000)),
            memory: Math.floor(process.memoryUsage().heapUsed / 1024 / 1024)
        };

        const totalValues = shardResults.reduce((acc, curr) => {
            Object.entries(curr).forEach(([key, val]) => {
                if (!acc[key]) acc[key] = 0;
                acc[key] += val;
            });
            return acc;
        }, {});
        totalValues.uptime = this.client.resolver.timeAgo(Math.floor(totalValues.uptime / 1000));

        const embed = {
            title: message.format('C_STATS_TITLE', {
                client: this.client.user.tag,
                version: require('../../../../../package.json').version
            }),
            description: message.format('C_STATS_DESC', descValues),
            fields: [
                {
                    name: message.format('C_STATS_CURRENT_SHARD', { shard: guild.shardID }),
                    value: message.format('C_STATS_CURRENT_SHARDS_VALUE', shardValues),
                    inline: true
                },
                {
                    name: message.format('C_STATS_TOTAL', { shards: shard.count }),
                    value: message.format('C_STATS_TOTAL_VALUE', totalValues),
                    inline: true
                }
            ]
        };

        message.embed(embed);

    }

}

module.exports = StatsCommand;