use color_eyre::Result;
use ratatui::{
    text::Text,
    layout::{Alignment, Constraint, Rect}, 
    widgets::{Block, Cell, Row, Table}, 
    Frame
};
use subxt::ext::sp_core::crypto::{Ss58Codec, Ss58AddressFormat, AccountId32};
use std::sync::mpsc::Sender;

use super::{Component, PartialComponent, CurrentTab};
use crate::{
    action::Action, config::Config, palette::StylePalette, 
    types::RewardDestination, widgets::DotSpinner,
};

#[derive(Debug)]
pub struct StakingLedger {
    is_active: bool,
    is_bonded: bool,
    account_id: [u8; 32],
    network_tx: Option<Sender<Action>>,
    total_staked: Option<u128>,
    active_staked: Option<u128>,
    reward_destination: RewardDestination,
    palette: StylePalette
}

impl Default for StakingLedger {
    fn default() -> Self {
        Self::new()
    }
}

impl StakingLedger {
    const TICKER: &str = " CSPR";
    const DECIMALS: usize = 6;

    pub fn new() -> Self {
        Self {
            is_active: false,
            is_bonded: false,
            account_id: [0u8; 32],
            network_tx: None,
            total_staked: None,
            active_staked: None,
            reward_destination: Default::default(),
            palette: StylePalette::default(),
        }
    }

    fn set_used_account_id(&mut self, account_id: [u8; 32]) {
        self.account_id = account_id;
        if let Some(network_tx) = &self.network_tx {
            let _ = network_tx.send(Action::GetValidatorLedger(account_id, false));
            let _ = network_tx.send(Action::GetStakingPayee(account_id, false));
            let _ = network_tx.send(Action::GetIsStashBonded(account_id, false));
        }
    }

    fn prepare_u128(&self, maybe_value: Option<u128>) -> String {
        match maybe_value {
            Some(value) => {
                let value = value as f64 / 10f64.powi(18);
                let after = Self::DECIMALS;
                format!("{:.after$}{}", value, Self::TICKER)
            },
            None => format!("{}{}", DotSpinner::default().to_string(), Self::TICKER)
        }
    }

    fn get_reward_destination(&self) -> String {
        match self.reward_destination {
            RewardDestination::Staked => "re-stake".to_string(),
            RewardDestination::Stash => "stake".to_string(),
            RewardDestination::Controller => "controller".to_string(),
            RewardDestination::None => "none".to_string(),
            RewardDestination::Account(account_id) => {
                let address = AccountId32::from(account_id)
                    .to_ss58check_with_version(Ss58AddressFormat::custom(1996));
                let tail = address.len().saturating_sub(5);
                format!("{}..{}", &address[..5], &address[tail..])
            },
        }
    }

    fn is_bonded_to_string(&self) -> String {
        if self.is_bonded {
            "bonded".to_string()
        } else {
            "no bond".to_string()
        }
    }
}

impl PartialComponent for StakingLedger {
    fn set_active(&mut self, current_tab: CurrentTab) {
        match current_tab {
            CurrentTab::Accounts => self.is_active = true,
            _ => self.is_active = false,
        }
    }
}

impl Component for StakingLedger {
    fn register_network_handler(&mut self, tx: Sender<Action>) -> Result<()> {
        self.network_tx = Some(tx);
        Ok(())
    }

    fn register_config_handler(&mut self, config: Config) -> Result<()> {
        if let Some(style) = config.styles.get(&crate::app::Mode::Wallet) {
            self.palette.with_normal_style(style.get("normal_style").copied());
            self.palette.with_hover_style(style.get("hover_style").copied());
            self.palette.with_normal_border_style(style.get("normal_border_style").copied());
            self.palette.with_hover_border_style(style.get("hover_border_style").copied());
            self.palette.with_normal_title_style(style.get("normal_title_style").copied());
            self.palette.with_hover_title_style(style.get("hover_title_style").copied());
        }
        Ok(())
    }

    fn update(&mut self, action: Action) -> Result<Option<Action>> {
        match action {
            Action::UsedAccount(account_id, _) => self.set_used_account_id(account_id),
            Action::SetIsBonded(is_bonded, account_id) if self.account_id == account_id =>
                self.is_bonded = is_bonded,
            Action::SetStakingPayee(reward_destination, account_id) if self.account_id == account_id =>
                self.reward_destination = reward_destination,
            Action::SetStakedAmountRatio(total, active, account_id) if self.account_id == account_id => {
                self.total_staked = total;
                self.active_staked = active;
            },
            _ => {}
        };
        Ok(None)
    }

    fn draw(&mut self, frame: &mut Frame, area: Rect) -> Result<()> {
        let [_, _, _, place] = super::account_layout(area);
        let (border_style, border_type) = self.palette
            .create_border_style(self.is_active);

        let table = Table::new(
            [
                Row::new(vec![
                    Cell::from(Text::from("bond ready:".to_string()).alignment(Alignment::Left)),
                    Cell::from(Text::from(self.is_bonded_to_string()).alignment(Alignment::Right)),
                ]),
                Row::new(vec![
                    Cell::from(Text::from("destination:".to_string()).alignment(Alignment::Left)),
                    Cell::from(Text::from(self.get_reward_destination()).alignment(Alignment::Right)),
                ]),
                Row::new(vec![
                    Cell::from(Text::from("total:".to_string()).alignment(Alignment::Left)),
                    Cell::from(Text::from(self.prepare_u128(self.total_staked)).alignment(Alignment::Right))
                ]),
                Row::new(vec![
                    Cell::from(Text::from("active:".to_string()).alignment(Alignment::Left)),
                    Cell::from(Text::from(self.prepare_u128(self.active_staked)).alignment(Alignment::Right)),
                ]),
            ],
            [
                Constraint::Max(12),
                Constraint::Min(14),
            ]
        )
        .block(Block::bordered()
            .border_style(border_style)
            .border_type(border_type)
            .title_alignment(Alignment::Right)
            .title_style(self.palette.create_title_style(false))
            .title("Nomination stake"));

        frame.render_widget(table, place);
        Ok(())
    }
}