use std::fmt::Display;

use async_trait::async_trait;
use gamenight_api_client_rs::apis::configuration::Configuration;
use inquire::Text;

use crate::{domain::config::{Config, Instance}, flows::{gamenight_menu::GamenightMenu, login::Login, FlowError}};

use super::{Flow, FlowOutcome, FlowResult, GamenightState};

#[derive(Clone)]
pub struct Connect {
    instance: Option<Instance>
}

impl Connect {
    pub fn to(instance: Instance) -> Self {
        Self {
            instance: Some(instance)
        }
    }

    pub fn new() -> Self {
        Self {
            instance: None
        }
    }

    pub fn prompt_new_instance(&self, config: &Config) -> Result<Option<Instance>, FlowError> {
        let instance_name: String;
        loop {
            if let Some(name) = Text::new("Name this instance:").prompt_skippable()? {
                if config.instances.iter().find(|x| x.name == name).is_none() {
                    instance_name = name;
                    break;
                } else {
                    clear_screen::clear();
                    println!("Name already in use, please provide a unique name");
                }
            }
            else {
                return Ok(None);
            }
        }
        if let Some(url) = Text::new("What is the server URL: ").prompt_skippable()? {
            Ok(Some(Instance::new(instance_name, url)))
        } else {
            Ok(None)
        }
        
    }

    pub async fn try_refresh_token_if_exists(&self, instance: &mut Instance, api_configuration: &mut Configuration, config: &mut Config, instance_name: &String) -> Result<bool, FlowError> {
        if let Some(token) = &instance.token {
            api_configuration.bearer_access_token = Some(token.clone());
            let result = gamenight_api_client_rs::apis::default_api::post_token(api_configuration).await;
            if let Ok(token) = result {
                let instance = config.instances.iter_mut().find(|x| x.name == *instance_name).unwrap();
                instance.token = token.jwt_token.clone();
                api_configuration.bearer_access_token = token.jwt_token.clone();
                Config::save(&config)?;
                Ok(true)
            }
            else {
                Ok(false)
            }
        } else {
            Ok(false)   
        }
    }

    pub fn update_state_on_logon(&self, instance: &mut Instance, api_configuration: &mut Configuration, config: &mut Config, instance_name: &String) -> Result<(), FlowError> {
        if self.instance.is_none() {
            instance.token = Some(api_configuration.bearer_access_token.clone().unwrap());
            config.instances.push(instance.clone());
        } 
        else {
            let instance = config.instances.iter_mut().find(|x| x.name == *instance_name).unwrap();
            instance.token = Some(api_configuration.bearer_access_token.clone().unwrap());
        }
        config.last_instance = Some(instance_name.clone());
       
        Config::save(&config)?;
        Ok(())
    }
}

#[async_trait]
impl<'a> Flow<'a> for Connect {
    async fn run(&self, state: &'a mut GamenightState) -> FlowResult<'a> {
        let mut instance = if let Some(instance) = self.instance.clone() {
            instance
        } else {
            if let Some(instance) = self.prompt_new_instance(&state.gamenight_configuration)? {
                instance
            }
            else {
                return Ok((FlowOutcome::Cancelled, state));
            }
        };

        let instance_name = instance.name.clone();
        state.api_configuration.base_path = instance.url.clone();

        if self.try_refresh_token_if_exists(&mut instance, &mut state.api_configuration, &mut state.gamenight_configuration, &instance_name).await? {
            let gamenight_menu_flow = GamenightMenu::new();
            gamenight_menu_flow.run(state).await
        } 
        else {
            let login_flow = Login::new();
            let (outcome, state) = login_flow.run(state).await?;

            if outcome == FlowOutcome::Successful {
                self.update_state_on_logon(&mut instance, &mut state.api_configuration, &mut state.gamenight_configuration, &instance_name)?;
 
                let gamenight_menu_flow = GamenightMenu::new();
                gamenight_menu_flow.run(state).await
            }
            else {
                Ok((outcome, state))
            }
        }
        
        

        
    }
}

impl Display for Connect {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        if let Some(instance) = &self.instance {
            write!(f, "Connect to: {}", instance.name)
        } else {
            write!(f, "Connect")
        }
        
    }
}