use serenity::client::Client;
use serenity::framework::standard::{
    macros::{command, group},
    CommandResult, StandardFramework,
};
use serenity::model::{
    channel::Message,
    id::{ChannelId, GuildId},
    prelude::User,
};
use serenity::prelude::*;
use std::fs::File;
use std::io::{self, BufRead, BufReader};
use time::Duration;

#[group]
#[commands(name)]
struct Fluff;
struct Handler;
impl EventHandler for Handler {
    fn guild_ban_addition(&self, ctx: Context, guild_id: GuildId, _: User) {
        if guild_id == 427456811973738498 {
            if let Err(e) =
                ChannelId(562731470423064587).say(&ctx, "Dies ist eine flauschige Diktatur!")
            {
                eprintln!("Couldn’t send message because {:?}", e);
            }
        }
    }
}

fn read_token() -> io::Result<String> {
    let reader = BufReader::new(File::open("secret")?);
    reader.lines().next().unwrap()
}

fn main() {
    let mut client = Client::new(&read_token().expect("no secret file"), Handler)
        .expect("Error creating client");
    client.with_framework(
        StandardFramework::new()
            .configure(|c| c.prefix("!"))
            .group(&FLUFF_GROUP),
    );

    if let Err(why) = client.start() {
        println!("An error occurred while running the client: {:?}", why);
    }
}

#[command]
fn name(ctx: &mut Context, msg: &Message) -> CommandResult {
    if let Some((_, name)) = msg.content.split_once(' ') {
        let (name, adjustment) = name.split_once(" -").unwrap_or((name, "0"));
        let adjustment = adjustment.strip_suffix("h").unwrap_or(adjustment);
        msg.guild(&ctx)
            .unwrap()
            .read()
            .edit_member(&ctx, msg.author.id, |m| m.nickname(name))?;
        let now = time::OffsetDateTime::now_utc()
            - adjustment
                .parse::<f32>()
                .map(|a| (a * 3600.0) as i64)
                .map(Duration::seconds)
                .ok()
                .unwrap_or_else(Duration::zero);
        println!(
            "{},{},{},{},{}",
            now.format("%d.%m.%Y %H:%M"),
            name,
            now.format("%y%m"),
            msg.author.id,
            now.unix_timestamp()
        );
    } else {
        msg.reply(&ctx, "Please specify a new name.")?;
    }
    Ok(())
}