use itertools::Itertools;
use lazy_static;
use serde::Deserialize;
use serenity::model::channel::Message;

#[derive(Deserialize, Debug)]
pub struct Command<'a> {
    trigger: &'a str,
    command: &'a str,
    users: Vec<u64>,
}

#[derive(Deserialize, Debug)]
struct Config {
    #[serde(rename = "command")]
    commands: Vec<Command<'static>>,
}

lazy_static! {
    static ref RAW_CONFIG: String = super::file::read_file("config.toml").join("\n");
    static ref COMMANDS: Vec<Command<'static>> = {
        toml::from_str::<Config>(&RAW_CONFIG).expect("Error in config").commands
    };
}

pub fn print_commands() {
    COMMANDS.iter().for_each(|c| println!("{:?}", c));
}

pub fn find_matching(message: &str) -> Option<&Command> {
    COMMANDS.iter().find(|&c| message.starts_with(&c.trigger))
}

impl<'a> Command<'a> {
    pub fn execute(&self, msg: &Message) -> Result<(), &'static str> {
        if !self.users.contains(&msg.author.id.0) {
            return Err("You don’t have the permissions to execute this command.");
        }
        unimplemented!()
    }
}