use color_eyre::Result;
use crossterm::event::{KeyCode, KeyEvent};
use ratatui::{
    layout::{Constraint, Layout, Rect},
    Frame,
};

use std::sync::mpsc::Sender;
use tokio::sync::mpsc::UnboundedSender;

use super::Component;
use crate::{action::Action, app::Mode, config::Config};

mod bond_popup;
mod change_blocks_popup;
mod chill_popup;
mod event_log;
mod gatekeeper_details;
mod gatekeeper_endpoints_popup;
mod gatekeepers;
mod history;
mod listen_addresses;
mod nominators;
mod payee_popup;
mod payout_all_popup;
mod payout_popup;
mod peers;
mod rebond_popup;
mod reward_details;
mod rotate_popup;
mod staking_details;
mod stash_details;
mod stash_info;
mod unbond_popup;
mod validate_popup;
mod withdraw_popup;
mod withdrawals;

use bond_popup::BondPopup;
use change_blocks_popup::ChangeBlocksPopup;
use chill_popup::ChillPopup;
use event_log::EventLogs;
use gatekeeper_details::GatekeeperDetails;
use gatekeeper_endpoints_popup::GatekeeperEndpoints;
use gatekeepers::Gatekeepers;
use history::History;
use listen_addresses::ListenAddresses;
use nominators::NominatorsByValidator;
use payee_popup::PayeePopup;
use payout_all_popup::PayoutAllPopup;
use payout_popup::PayoutPopup;
use peers::Peers;
use rebond_popup::RebondPopup;
use reward_details::RewardDetails;
use rotate_popup::RotatePopup;
use staking_details::StakingDetails;
use stash_details::StashDetails;
use stash_info::StashInfo;
use unbond_popup::UnbondPopup;
use validate_popup::ValidatePopup;
use withdraw_popup::WithdrawPopup;
use withdrawals::Withdrawals;

#[derive(Debug, Copy, Clone, PartialEq)]
pub enum CurrentTab {
    Nothing,
    ListenAddresses,
    Gatekeepers,
    NominatorsByValidator,
    History,
    Withdrawals,
    Peers,
    EventLogs,
    BondPopup,
    PayoutPopup,
    PayoutAllPopup,
    RotatePopup,
    ValidatePopup,
    ChillPopup,
    UnbondPopup,
    RebondPopup,
    WithdrawPopup,
    PayeePopup,
    ChangeBlocksPopup,
    GatekeeperEndpoints,
}

pub trait PartialComponent: Component {
    fn set_active(&mut self, current_tab: CurrentTab);
}

pub struct Validator {
    is_active: bool,
    current_tab: CurrentTab,
    previous_tab: CurrentTab,
    components: Vec<Box<dyn PartialComponent>>,
}

impl Default for Validator {
    fn default() -> Self {
        Self {
            is_active: false,
            current_tab: CurrentTab::Nothing,
            previous_tab: CurrentTab::Nothing,
            components: vec![
                Box::new(StashInfo::default()),
                Box::new(NominatorsByValidator::default()),
                Box::new(StashDetails::default()),
                Box::new(StakingDetails::default()),
                Box::new(RewardDetails::default()),
                Box::new(GatekeeperDetails::default()),
                Box::new(History::default()),
                Box::new(Withdrawals::default()),
                Box::new(Peers::default()),
                Box::new(ListenAddresses::default()),
                Box::new(Gatekeepers::default()),
                Box::new(EventLogs::default()),
                Box::new(BondPopup::default()),
                Box::new(PayoutPopup::default()),
                Box::new(PayoutAllPopup::default()),
                Box::new(RotatePopup::default()),
                Box::new(ValidatePopup::default()),
                Box::new(ChillPopup::default()),
                Box::new(UnbondPopup::default()),
                Box::new(RebondPopup::default()),
                Box::new(WithdrawPopup::default()),
                Box::new(PayeePopup::default()),
                Box::new(ChangeBlocksPopup::default()),
                Box::new(GatekeeperEndpoints::default()),
            ],
        }
    }
}

impl Validator {
    fn move_left(&mut self) {
        match self.current_tab {
            CurrentTab::EventLogs => self.current_tab = CurrentTab::Peers,
            CurrentTab::Peers => self.current_tab = CurrentTab::Withdrawals,
            CurrentTab::Withdrawals => self.current_tab = CurrentTab::History,
            CurrentTab::History => self.current_tab = CurrentTab::NominatorsByValidator,
            CurrentTab::NominatorsByValidator => self.current_tab = CurrentTab::Gatekeepers,
            CurrentTab::ListenAddresses => self.current_tab = CurrentTab::Gatekeepers,
            _ => {}
        }
    }

    fn move_right(&mut self) {
        match self.current_tab {
            CurrentTab::ListenAddresses => self.current_tab = CurrentTab::Gatekeepers,
            CurrentTab::Gatekeepers => self.current_tab = CurrentTab::NominatorsByValidator,
            CurrentTab::Nothing => self.current_tab = CurrentTab::NominatorsByValidator,
            CurrentTab::NominatorsByValidator => self.current_tab = CurrentTab::History,
            CurrentTab::History => self.current_tab = CurrentTab::Withdrawals,
            CurrentTab::Withdrawals => self.current_tab = CurrentTab::Peers,
            CurrentTab::Peers => self.current_tab = CurrentTab::EventLogs,
            _ => {}
        }
    }
}

impl Component for Validator {
    fn register_network_handler(&mut self, tx: Sender<Action>) -> Result<()> {
        for component in self.components.iter_mut() {
            component.register_network_handler(tx.clone())?;
        }
        Ok(())
    }

    fn register_action_handler(&mut self, tx: UnboundedSender<Action>) -> Result<()> {
        for component in self.components.iter_mut() {
            component.register_action_handler(tx.clone())?;
        }
        Ok(())
    }

    fn register_config_handler(&mut self, config: Config) -> Result<()> {
        for component in self.components.iter_mut() {
            component.register_config_handler(config.clone())?;
        }
        Ok(())
    }

    fn handle_key_event(&mut self, key: KeyEvent) -> Result<Option<Action>> {
        if !self.is_active {
            return Ok(None);
        }

        match self.current_tab {
            CurrentTab::BondPopup
            | CurrentTab::RotatePopup
            | CurrentTab::ValidatePopup
            | CurrentTab::ChillPopup
            | CurrentTab::UnbondPopup
            | CurrentTab::RebondPopup
            | CurrentTab::WithdrawPopup
            | CurrentTab::PayoutPopup
            | CurrentTab::PayoutAllPopup
            | CurrentTab::ChangeBlocksPopup
            | CurrentTab::GatekeeperEndpoints => {
                for component in self.components.iter_mut() {
                    component.handle_key_event(key)?;
                }
            }
            _ => match key.code {
                KeyCode::Esc => {
                    self.is_active = false;
                    self.current_tab = CurrentTab::Nothing;
                    for component in self.components.iter_mut() {
                        component.set_active(self.current_tab.clone());
                    }
                    return Ok(Some(Action::SetActiveScreen(Mode::Menu)));
                }
                KeyCode::Char('R') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::RotatePopup;
                }
                KeyCode::Char('V') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::ValidatePopup;
                }
                KeyCode::Char('U') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::UnbondPopup;
                }
                KeyCode::Char('C') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::ChillPopup;
                }
                KeyCode::Char('B') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::BondPopup;
                }
                KeyCode::Char('E') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::RebondPopup;
                }
                KeyCode::Char('W') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::WithdrawPopup;
                }
                KeyCode::Char('L') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::ListenAddresses;
                }
                KeyCode::Char('I') => {
                    self.previous_tab = self.current_tab;
                    self.current_tab = CurrentTab::PayeePopup;
                }
                KeyCode::Char('l') | KeyCode::Right => self.move_right(),
                KeyCode::Char('h') | KeyCode::Left => self.move_left(),
                _ => {
                    for component in self.components.iter_mut() {
                        component.handle_key_event(key)?;
                    }
                }
            },
        }
        Ok(None)
    }

    fn update(&mut self, action: Action) -> Result<Option<Action>> {
        match action {
            Action::SetActiveScreen(Mode::Validator) => {
                self.is_active = true;
                self.previous_tab = CurrentTab::NominatorsByValidator;
                self.current_tab = CurrentTab::NominatorsByValidator;
            }
            Action::PayoutValidatorPopup(_) => {
                self.previous_tab = self.current_tab;
                self.current_tab = CurrentTab::PayoutPopup;
            }
            Action::PayoutAllValidatorPopup(_) => {
                self.previous_tab = self.current_tab;
                self.current_tab = CurrentTab::PayoutAllPopup;
            }
            Action::WithdrawValidatorPopup => {
                self.previous_tab = self.current_tab;
                self.current_tab = CurrentTab::WithdrawPopup;
            }
            Action::ChangeBlocksPopup => {
                self.previous_tab = self.current_tab;
                self.current_tab = CurrentTab::ChangeBlocksPopup;
            }
            Action::GatekeeperEndpoints => {
                self.previous_tab = self.current_tab;
                self.current_tab = CurrentTab::GatekeeperEndpoints;
            }
            Action::ClosePopup => self.current_tab = self.previous_tab,
            _ => {}
        }
        for component in self.components.iter_mut() {
            component.set_active(self.current_tab.clone());
            component.update(action.clone())?;
        }
        Ok(None)
    }

    fn draw(&mut self, frame: &mut Frame, area: Rect) -> Result<()> {
        let screen = super::layouts::screen_layout(area);
        for component in self.components.iter_mut() {
            component.draw(frame, screen)?;
        }
        Ok(())
    }
}

pub fn validator_layout(area: Rect) -> [Rect; 4] {
    Layout::vertical([
        Constraint::Length(18),
        Constraint::Fill(1),
        Constraint::Fill(1),
        Constraint::Percentage(25),
    ])
    .areas(area)
}

pub fn validator_details_layout(area: Rect) -> [Rect; 2] {
    let [place, _, _, _] = validator_layout(area);
    Layout::horizontal([Constraint::Length(31), Constraint::Fill(1)]).areas(place)
}

pub fn validator_session_and_listen_layout(area: Rect) -> [Rect; 3] {
    let [_, place] = validator_details_layout(area);
    Layout::vertical([
        Constraint::Length(6),
        Constraint::Length(6),
        Constraint::Fill(1),
    ])
    .areas(place)
}

pub fn validator_gatekeeped_networks_layout(area: Rect) -> [Rect; 2] {
    let [_, _, place] = validator_session_and_listen_layout(area);
    Layout::horizontal([Constraint::Fill(1), Constraint::Length(30)]).areas(place)
}

pub fn validator_statistics_layout(area: Rect) -> [Rect; 3] {
    let [_, place, _, _] = validator_layout(area);
    Layout::horizontal([
        Constraint::Percentage(30),
        Constraint::Percentage(40),
        Constraint::Percentage(30),
    ])
    .areas(place)
}

pub fn validator_balance_layout(area: Rect) -> [Rect; 3] {
    let [place, _] = validator_details_layout(area);
    Layout::vertical([
        Constraint::Length(6),
        Constraint::Length(6),
        Constraint::Fill(1),
    ])
    .areas(place)
}