client.on('message', message => {
    let args = message.content.slice(prefix.length).split(' ')
    if (!message.content.startsWith(prefix)) return
    let i = 0
    if (args[0].toLowerCase() === 'ban') {
        okRoles.forEach(element => {
            if (message.member.roles.has(element)) i++
        })
        if (i = 0) {
            return message.channel.send('You do not have the correct role to use this command.')
        }
        if (!args[1]) {
            return message.channel.send('Make sure you mention someone, or give a valid user ID.')
        }
        let member = message.mentions.members.first() || message.guild.members.get(args[1])
        if (!member) {
            return message.channel.send('Could not find that user. Make sure you mention someone, or give a valid user ID.')
        }
        if (!message.guild.me.hasPermission('BAN_MEMBERS')) {
            return message.channel.send('I am missing permission: `Ban Members`.')
        }
        if (member.id === message.member.id) {
            return message.channel.send('You cannot ban yourself.')
        }
        if (member.id === client.user.id) {
            return message.channel.send('I cannot ban myself.')
        }
        let reason = args.slice(2).join(' ')
        message.channel.send(`Are you sure you want to ban **${member.user.tag}**?`)
        const filter = m => m.author.id === message.author.id
        const collector = message.channel.createMessageCollector(filter, { time: 999999 })
        collector.on('collect', m => {
            collector.stop()
            if (m.content.toLowerCase() === 'n' || m.content.toLowerCase() === 'no' || m.content.toLowerCase() === 'cancel') {
                return message.channel.send('Command cancelled.')
            }
            if (m.content.toLowerCase() === 'y' || m.content.toLowerCase() === 'yes' || m.content.toLowerCase() === 'sure') {
                return member.ban( { reason: reason } ).then(() => {
                    message.channel.send(`Success! Banned **${member.user.tag}**\n For reason: \`${reason ? reason : `None provided`}\`.`)
                })
            }
            message.channel.send('Command cancelled. Next time, reply with a `yes` or a `no`.')
        })
    }
})