use tokio::sync::mpsc::UnboundedReceiver;
use twitch_irc::login::StaticLoginCredentials;
use twitch_irc::ClientConfig;
use twitch_irc::SecureTCPTransport;
use twitch_irc::TwitchIRCClient;
use twitch_irc::message::PrivmsgMessage;
use twitch_irc::message::ServerMessage;
use twitch_irc::transport::tcp::TCPTransport;
use twitch_irc::transport::tcp::TLS;
use std::env;
use dotenv::dotenv;

use std::collections::HashMap;

use rand::Rng;


//mod sub::ratelimiter;

use crate::core::ratelimiter::RateLimiter;
use crate::core::ratelimiter;
// use crate::core::ratelimiter;

#[derive(Debug, PartialEq, Eq, Hash)]
pub enum ChType {
    Channel(String),
}


pub use ChType::Channel;

pub enum ModType {
    BotModule(String),
}

pub use ModType::BotModule;

pub enum EnType {
    Enabled(ChType),
}

pub use EnType::Enabled;


pub struct BotInstance {
	prefix : char,
	bot_channel : ChType,
	pub client : TwitchIRCClient<TCPTransport<TLS>,StaticLoginCredentials>, 
    pub incoming_messages : UnboundedReceiver<ServerMessage>,
	pub ratelimiters : HashMap<ChType,RateLimiter>, // used to limit messages sent per channel 
	// botmodules : HashMap<ModType,Vec<EnType>>,
	twitch_oauth : String,
	pub bot_channels : Vec<ChType>,
	/*bot_commands : Vec[BotCommand],
	bot_listeners : Vec[Listener],
	bot_routines : Vec[Routine],*/
	// botactionsdb : botactionsdb:botactions,
	// identity : identitymodule,
}

impl BotInstance {


    pub fn init() -> BotInstance {
        dotenv().ok();

        let login_name = env::var("login_name").unwrap().to_owned();
        let oauth_token = env::var("access_token").unwrap().to_owned();
        let prefix = env::var("prefix").unwrap().to_owned().chars().next().expect("ERROR : when defining prefix");

        /*
        Vector of channels to join
        */

        let mut botchannels = Vec::new();

        for chnl in env::var("bot_channels").unwrap().split(',') {
            // println!("(Env Var # {})",chnl);
            botchannels.push(Channel(String::from(chnl)));
        }

        let config = ClientConfig::new_simple(
            StaticLoginCredentials::new(login_name.to_owned(), Some(oauth_token.to_owned()))
        );

        let (incoming_messages, client) =
        TwitchIRCClient::<SecureTCPTransport, StaticLoginCredentials>::new(config);

        // hashmap for channels and their associated ratelimiters
        let mut ratelimiters = HashMap::new();

        for Channel(chnl) in &botchannels {
            // For each channel in botchannels

            client.join(chnl.to_owned()).unwrap();

            // ratelimiters are a hashmap of channel and a corresponding rate limiter 
            let n = RateLimiter::new();
            ratelimiters.insert(Channel(String::from(chnl)),n);
        }

        

        let b = BotInstance {
            prefix : prefix,
            bot_channel : Channel(login_name) ,
            incoming_messages : incoming_messages,
            client : client,
            ratelimiters : ratelimiters, // used to limit messages sent per channel 
            // botmodules : HashMap::new(),
            twitch_oauth : oauth_token,
            bot_channels : botchannels,
            /*bot_commands : Vec[BotCommand],
            bot_listeners : Vec[Listener],
            bot_routines : Vec[Routine],*/
            // botactionsdb : botactionsdb:botactions,
            // identity : identitymodule,            
        };


        println!("{:?}",b.ratelimiters);


        b
    }


    pub async fn run(mut self) -> () {

        let join_handle = tokio::spawn(async move {

            while let Some(message) = self.incoming_messages.recv().await {
                // Below can be used to debug if I want to capture all messages
                // println!("Received message: {:?}", message);
    
                match message {
                    ServerMessage::Notice(msg) => {
                        if let Some(chnl) = msg.channel_login {
                            println!("NOTICE : (#{}) {}", chnl, msg.message_text);
                        }
                    }
                    ServerMessage::Privmsg(msg) => {
                        println!("(#{}) {}: {}", msg.channel_login, msg.sender.name, msg.message_text);

                        println!("Privmsg section");

                        // b.listener_main_prvmsg(&msg);
                        self.listener_main_prvmsg(&msg).await;

                    },
                    ServerMessage::Whisper(msg) => {
                        println!("(w) {}: {}", msg.sender.name, msg.message_text);
                    },
                    ServerMessage::Join(msg) => {
                        println!("JOINED: {}", msg.channel_login);
                    },
                    ServerMessage::Part(msg) => {
                        println!("PARTED: {}", msg.channel_login);
                    },
                    _ => {}
                }
            }
        });
    
    
    
    
    
        join_handle.await.unwrap();
    }


// -----------------
// PRIVATE FUNCTIONS 


    async fn listener_main_prvmsg(&mut self,msg:& PrivmsgMessage) -> () {

        println!("(#{}) {}: {}", msg.channel_login, msg.sender.name, msg.message_text);
                            
        
        // // let contextratelimiter = ratelimiters.get_mut(&msg.channel_login).expect("ERROR: Issue with Rate limiters");
        let contextratelimiter = self.ratelimiters
            .get_mut(&Channel(String::from(&msg.channel_login)))
            .expect("ERROR: Issue with Rate limiters");
        // let contextratelimiter = self.ratelimiters.get(&msg.channel_login).expect("ERROR: Issue with Rate limiters");
    
        match contextratelimiter.check_limiter() {
            ratelimiter::LimiterResp::Allow => {
                let maxblanks = rand::thread_rng().gen_range(1..=20);
                //let mut outmsg = "GotTrolled ".to_owned();
                let mut outmsg = "annytfLurk ".to_owned();
    
                for _i in 1..maxblanks {
                    let blankspace: &str = "󠀀";
                    outmsg.push_str(blankspace);
                }
    
                // client.say_in_reply_to(&msg,outmsg).await.unwrap();
                self.client.say_in_reply_to(msg,outmsg).await.unwrap();
                println!("(#{}) > {}", msg.channel_login, "rate limit counter increase");
                contextratelimiter.increment_counter();
                println!("{:?}",self.ratelimiters);
            },
            ratelimiter::LimiterResp::Skip => {
                (); // do nothing otherwise
            }
        }

        println!("End of Separate Listener Main prvmsg");
    
    }

}