const Discord = require("discord.js");
const client = new Discord.Client();
const token = '';

client.login(token);

// initialize bot
client.on('ready', () => {
    console.log(`Logged in as ${client.user.username}`);
    // send a bjr. the main function of the bot
    let hasBjr = false;
    setInterval(() => {
        let today = new Date();
        if ((!today.dst() && today.getHours() === 12) || (today.dst() && today.getHours() === 11)) {
            if (!hasBjr) {
                hasBjr = true;
                for (let [k, v] of client.channels) {
                    if ((v instanceof Discord.TextChannel) && v.permissionsFor(client.user).hasPermission("SEND_MESSAGES")) {
                        v.sendMessage('bjr')
                        .then(console.log('Sent bjr on ' + today.toString()))
                        .catch(console.error);
                    }
                }
            }
        } else {
            hasBjr = false;
        }
    }, 999);

});

// take commands here
client.on('message', (msg) => {
    if (msg.content.toUpperCase() === '!BJR') {
        msg.channel.sendMessage('bjr');
    }
});

// date stuff
Date.prototype.stdTimezoneOffset = function() {
    let jan = new Date(this.getFullYear(), 0, 1);
    let jul = new Date(this.getFullYear(), 6, 1);
    return Math.max(jan.getTimezoneOffset(), jul.getTimezoneOffset());
}

Date.prototype.dst = function() {
    return this.getTimezoneOffset() < this.stdTimezoneOffset();
}