use core::{panic};
use std::error::Error;

use std::collections::HashMap;

use crate::core::identity;


/*

ModulesManager is used to manage Modules and BotActions associated with those modules 

pub struct ModulesManager {
    statusdb: HashMap<ModType,Vec<ModStatusType>>,
    botactions: HashMap<ModType,Vec<BotAction>>, 
}

- statusdb: HashMap<ModType,Vec<ModStatusType>> - Defines Modules and their ModStatusType (e.g., Enabled at an Instance level, Disabled at a Channel Level)
- botactions: HashMap<ModType,Vec<BotAction>> - Defines Modules and their BotActions (e.g., BotCommand , Listener, Routine) 

Example
    {
        ModulesManager { 
            statusdb: {BotModule("experiments 004"): [Enabled(Instance)]}, 
            botactions: {BotModule("experiments 004"): [C(BotCommand { module: BotModule("experiments 004"), command: "DUPCMD4", alias: ["DUPALIAS4A", "DUPALIAS4B"], help: "DUPCMD4 tester" })]} }
    }

*/

#[derive(Debug, PartialEq, Eq, Hash, Clone)]
pub enum ModType {
    BotModule(String),
}
    
pub use ModType::BotModule;

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


pub use ChType::Channel;
use twitch_irc::message::PrivmsgMessage;

use crate::core::botinstance::{self, BotInstance};


#[derive(Debug)]
enum StatusLvl {
    Instance,
    Ch(ChType),
}

#[derive(Debug)]
pub enum ModStatusType {
    Enabled(StatusLvl),
    Disabled(StatusLvl),
}
    
pub enum BotAction
{
	C(BotCommand),
    L(Listener),
	R(Routine),
}

impl BotAction {
    pub async fn execute(&self,m:botinstance::Chat,n:PrivmsgMessage){
        
        match self {
            BotAction::L(a) => a.execute(m,n).await,
            BotAction::C(a) => a.execute(m,n).await,
            _ => (),
        }

    }
}

pub trait BotActionTrait 
{
    fn add_to_bot(self, bot:BotInstance);
    fn add_to_modmgr(self,modmgr:&mut ModulesManager);
}


pub struct BotCommand {
    pub module : ModType,
    pub command : String, // command call name
    pub alias : Vec<String>, // String of alternative names
    // bot_prefix : char, // although should be global?
    pub exec_body : bot_actions::actions_util::ExecBody,
    pub help : String,
    pub required_roles : Vec<identity::UserRole>,
}

impl BotCommand
{
    pub async fn execute(&self,m:botinstance::Chat,n:PrivmsgMessage){
        (self.exec_body)(m,n).await;
    }
}


impl BotActionTrait for BotCommand 
{
    fn add_to_bot(self, mut bot:BotInstance) {    
        let mgr = &mut bot.botmgrs.botmodules;
        self.add_to_modmgr(mgr);
    }

    fn add_to_modmgr(self, modmgr:&mut ModulesManager) {
        modmgr.add_botaction(self.module.clone(), BotAction::C(self))
    }

}



pub mod bot_actions {

    pub mod actions_util {
    
        use std::future::Future;
        use std::boxed::Box;
        use std::pin::Pin;

        use crate::core::botinstance::Chat;
        use twitch_irc::message::PrivmsgMessage;
        
        pub type ExecBody = Box<dyn Fn(Chat,PrivmsgMessage) -> Pin<Box<dyn Future<Output=()> + Send>> + Send + Sync>;
        //pub type ExecBody<F> = Box<dyn Fn(Chat,PrivmsgMessage) -> Pin<Box<dyn Future<Output=F> + Send>> + Send + Sync>;

        //pub fn asyncbox<T,F>(f: fn(Chat,PrivmsgMessage) -> T) -> ExecBody<F>
        pub fn asyncbox<T>(f: fn(Chat,PrivmsgMessage) -> T) -> ExecBody
        where
            T: Future<Output=()> + Send + 'static,
        {
            Box::new(move |a,b| Box::pin(f(a,b)))
        }
    }

    
}



pub struct Listener
{
    pub module : ModType,
    pub name : String,
    pub exec_body : bot_actions::actions_util::ExecBody,
    pub help : String
}

impl Listener
{
    pub async fn execute(&self,m:botinstance::Chat,n:PrivmsgMessage){
        (self.exec_body)(m,n).await;
    }
}

impl BotActionTrait for Listener 
{
    fn add_to_bot(self, mut bot:BotInstance) {    

        let mgr = &mut bot.botmgrs.botmodules;

        self.add_to_modmgr(mgr);
    }

    fn add_to_modmgr(self, modmgr:&mut ModulesManager) {
        modmgr.add_botaction(self.module.clone(), BotAction::L(self))
    }

}



#[derive(Debug)]
struct Routine {}

pub struct ModulesManager 
{
    statusdb: HashMap<ModType,Vec<ModStatusType>>,
    pub botactions: HashMap<ModType,Vec<BotAction>>, 
}

impl ModulesManager 
{

    pub fn init() -> ModulesManager
    {


        let m = HashMap::new();
        let act = HashMap::new();

        let mut mgr = ModulesManager {
            statusdb : m,
            botactions : act,
        };

        // initialize core modules
        crate::core::identity::init(&mut mgr);

        // initialize custom crate modules
        crate::modules::init(&mut mgr);



        println!(">> Modules Manager : End of Init");

        mgr
    } 

    pub fn modstatus(&self, _:ModType, _:ChType) -> ModStatusType {
        // Example usage : botmanager.modstatus(
        //     BotModule("GambaCore"),
        //     Channel("modulatingforce")
        // ) 
        // - The ModStatusType checks in the context of the given channel , 
        //  but also validates based on wheher the module is disabled at a bot instance
        //  level as well
        ModStatusType::Enabled(StatusLvl::Instance)
    }


    pub fn togglestatus(&self, _:ModType, _:ChType) -> ModStatusType {
        // enables or disables based on current status
        ModStatusType::Enabled(StatusLvl::Instance)
    }


    pub fn setstatus(&self, _:ModType, _:ModStatusType) -> Result<&str,Box<dyn Error>> {
        // sets the status based given ModSatusType
        // e.g., b.setstatus(BodModule("GambaCore"), Enabled(Channel("modulatingforce"))).expect("ERROR")
        Ok("")
    }

    //pub fn add_botaction(mut self, in_module:ModType, in_action:BotAction ) -> ModulesManager {
    // pub fn add_botaction(mut self, in_module:ModType, in_action:BotAction<F> ) -> ModulesManager<F> {
    //pub fn add_botaction(&mut self, in_module:ModType, in_action:BotAction ) -> () {
    pub fn add_botaction(&mut self, in_module:ModType, in_action:BotAction ) {
        /*
        adds a BotAction to the Modules Manager - This will require a BotModule passed as well
        This will including the logic of a valid add
        If it fails to add, either a PANIC or some default coded business rules that handles the botaction add
        For example, this Should PANIC (ideally Panic?) if it does not successfully add a bot module
        -- Being unable to indicates a Programming/Developer code logic issue : They cannot add botactions that already exists (?)
        -- In particular to BotCommands, which must have Unique command call names and aliases that to not conflict with any other
               already BotCommand added name or alias
        Other types might be fine? For example, if 2 modules have their own listeners but each have the name "targetchatter" ,
          both would be called separately, even if they both have the same or different logic 
        */

        // let newlistener = Listener {
        //     // module : BotModule(String::from("experiments").to_owned()),
        //     module : in_module.clone(),
        //     name : String::from("socklistener"),
        //     help : String::from("This will listen and react to sock randomly"),
        // };


        // As a Demonstration, the listener's Module is added and Enabled at Instance level


        // [x] Before Adding, validate the following : 
        //    - If BotAction to Add is a BotCommand , In Module Manager DB (botactions), 
        //       Check All Other BotAction Command Names & Aliases to ensure they don't conflict

        fn find_conflict_module(mgr:& ModulesManager, act:& BotAction) -> Option<ModType> 
        {

            // Some(BotModule(String::from("GambaCore")))

            
            // match act {
            //     BotAction::C(c) => {
            //         Some(BotModule(String::from("GambaCore")))
            //     },
            //     BotAction::L(l) => None,
            //     BotAction::R(r) => None,
            // }

            if let BotAction::C(incmd) = act {

                // let n = & mgr.botactions;

                let d = &mgr.botactions;

                for (module,moduleactions) in d {
                    
                    
                    for modact in moduleactions.iter() {
                        if let BotAction::C(dbcmd) = &modact {
                            // At this point, there is an command incmd and looked up dbcmd

                            // [x] check if given botcommand c.command:String conflicts with any in botactions

                            if incmd.command.to_lowercase() == dbcmd.command.to_lowercase() {
                                // Returning State - with the identified module
                                // return Some((module.clone(),BotAction::C(*dbcmd.clone())));
                                // return Some(incmd); // for some reason I keep getting issues
                                //return Some(BotModule(String::from("GambaCore"))); // works
                                return Some(module.clone()); // works
                                // return Some(dbcmd.clone());
                            } 

                            for a in &dbcmd.alias {
                                if incmd.command.to_lowercase() == a.to_lowercase() {
                                    // Returning State - with the identified module
                                    // return Some((module.clone(),BotAction::C(dbcmd)));
                                    return Some(module.clone()); // works

                                }  
                            } 


                            // [x] Then do the same check except for each c.alias

                            for inalias in &incmd.alias {
                                
                                if inalias.to_lowercase() == dbcmd.command.to_lowercase() {
                                    // Returning State - with the identified module
                                    // return Some((module.clone(),BotAction::C(dbcmd)));
                                    return Some(module.clone()); // works

                                } 

                                for a in &dbcmd.alias {
                                    if inalias.to_lowercase() == a.to_lowercase() {
                                        // Returning State - with the identified module
                                        // return Some((module.clone(),BotAction::C(dbcmd)));
                                        return Some(module.clone()); // works

                                    }  
                                } 

                            }


                        }
                    }

                }

                // return Some(BotModule(String::from("GambaCore")))
            }


            // for all other scenarios (e.g., Listener, Routine), find no conflicts
            None

        }

        // if let probmod = find_conflict_module(&self, &in_action) {
        //     // () // return because there was a conflict?
        //     panic!("ERROR: Could not add {:?} ; there was a conflict with existing module {:?}", in_action , probmod );
        // }
        match find_conflict_module(&self, &in_action) {
            // Some(c) => panic!("ERROR: Could not add {:?} ; there was a conflict with existing module {:?}", in_action , c ),
            Some(c) => panic!("ERROR: Could not add module; there was a conflict with existing module {:?}", c ),
            None => (),
        }

        let statusvector = self.statusdb
            // .entry(BotModule(String::from("experiments")))
            .entry(in_module.clone())
            .or_insert(Vec::new());

        statusvector.push(ModStatusType::Enabled(StatusLvl::Instance)); // Pushes the Module as Enabled at Instance Level

        let modactions = self.botactions
            //.entry( BotModule(String::from("experiments")))
            .entry( in_module.clone())
            .or_insert(Vec::new());

        // modactions.push(BotAction::L(newlistener));
        modactions.push(in_action);

        println!(">> Modules Manager : Called Add bot Action");
        //println!(">> Modules Manager : {:?}",&self);

        //();
        //let mgr = self;

        //mgr

        //self
    }




    fn statuscleanup(&self,_:Option<ChType>) -> () {
        // internal cleans up statusdb . For example : 
        // - remove redudancies . If we see several Enabled("m"), only keep 1x
        // - Clarify Conflict. If we see Enabled("m") and Disabled("m") , we remove Enabled("m") and keep Disabled("m")
        // the IDEAL is that this is ran before every read/update operation to ensure quality
        // Option<ChType> can pass Some(Channel("m")) (as an example) so statuscleanup only works on the given channel
        // Passing None to chnl may be a heavy operation, as this will review and look at the whole table
        ()
    }



}