use color_eyre::Result;
use ratatui::layout::Constraint;
use ratatui::{
    text::Text,
    layout::{Alignment, Rect}, 
    widgets::{Block, Cell, Row, Table}, 
    Frame
};

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

pub struct RewardDetails {
    palette: StylePalette,
    commission: Option<u32>,
    nominators_blocked: bool,
    apy: String,
    treasury_apy: String,
    inflation: String,
    stash: [u8; 32],
    in_staking_validators: bool, 
    in_queued_keys: bool,
    in_next_keys: bool,
    is_disabled: bool,
    in_rewards: bool,
}

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

impl RewardDetails {
    pub fn new() -> Self {
        Self {
            palette: StylePalette::default(),
            commission: None,
            nominators_blocked: false,
            apy: String::from("0.0%"),
            treasury_apy: String::from("0.0%"),
            inflation: String::from("0.0%"),
            stash: [0u8; 32],
            in_staking_validators: false, 
            in_queued_keys: false,
            in_next_keys: false,
            is_disabled: false,
            in_rewards: false,
        }
    }

    fn comission_to_string(&self) -> String {
        match self.commission {
            Some(commission) => {
                if self.nominators_blocked { "blocked".to_string() }
                else { format!("{:.2}%", commission as f64 / 10_000_000.0) }
            },
            None => DotSpinner::default().to_string(),
        }
    }

    fn update_individual(&mut self, individual: &Vec<EraRewardPoints>) {
        let (is_disabled, in_rewards) = individual
            .iter()
            .find(|data| data.account_id == self.stash)
            .map(|data| (data.disabled, true))
            .unwrap_or((false, false));
        self.is_disabled = is_disabled;
        self.in_rewards = in_rewards;
    }
}

impl PartialComponent for RewardDetails {
    fn set_active(&mut self, _current_tab: CurrentTab) { }
}

impl Component for RewardDetails {
    fn register_config_handler(&mut self, config: Config) -> Result<()> {
        if let Some(style) = config.styles.get(&crate::app::Mode::Validator) {
            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());
            self.palette.with_highlight_style(style.get("highlight_style").copied());
            self.palette.with_scrollbar_style(style.get("scrollbar_style").copied());
        }
        Ok(())
    }

    fn update(&mut self, action: Action) -> Result<Option<Action>> {
        match action {
            Action::SetStashAccount(stash) => self.stash = stash,
            Action::SetCurrentValidatorEraRewards(_, _, individual) => self.update_individual(&individual),
            Action::SetValidatorPrefs(commission, disabled, account_id) if self.stash == account_id => {
                self.commission = commission;
                self.in_staking_validators = commission.is_some();
                self.nominators_blocked = disabled;
            }
            Action::SetSessionKey(name, session_key_info) => {
                if name.starts_with("q_") {
                    self.in_queued_keys = !session_key_info.key.is_empty();
                } else {
                    self.in_next_keys = !session_key_info.key.is_empty();
                }
            },
            Action::Apy(apy) => self.apy = apy,
            Action::TreasuryApy(apy) => self.treasury_apy = apy,
            Action::Inflation(inflation) => self.inflation = inflation,
            _ => {}
        };
        Ok(None)
    }

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

        let status = if self.is_disabled {
            "Disabled"
        } else {
            let is_fully_in_session = self.in_queued_keys && self.in_next_keys;
            match (self.in_staking_validators, is_fully_in_session) {
                (true, true) => "Active",
                (true, false) => "Rotating",
                (false, true) if self.in_rewards => { "Stopping" }
                (false, true) if !self.in_rewards => { "Chill" }
                _ => "Nothing",
            }
        };
        let staking_status = format!("Staking status: {status}");

        let table = Table::new(
            vec![
                Row::new(vec![
                    Cell::from(Text::from("Nominators".to_string()).alignment(Alignment::Left)),
                    Cell::from(Text::from(self.comission_to_string()).alignment(Alignment::Right)), 
                ]),
                Row::new(vec![
                    Cell::from(Text::from("Validator APY".to_string()).alignment(Alignment::Left)),
                    Cell::from(Text::from(self.apy.clone()).alignment(Alignment::Right)), 
                ]),
                Row::new(vec![
                    Cell::from(Text::from("Treasury APY".to_string()).alignment(Alignment::Left)),
                    Cell::from(Text::from(self.treasury_apy.clone()).alignment(Alignment::Right)), 
                ]),
                Row::new(vec![
                    Cell::from(Text::from("Inflation".to_string()).alignment(Alignment::Left)),
                    Cell::from(Text::from(self.inflation.clone()).alignment(Alignment::Right)), 
                ]),
            ],
            [
                Constraint::Min(13),
                Constraint::Min(0),
            ],
        )
        .highlight_style(self.palette.create_highlight_style())
        .column_spacing(1)
        .block(Block::bordered()
            .border_style(border_style)
            .border_type(border_type)
            .title_alignment(Alignment::Right)
            .title_style(self.palette.create_title_style(false))
            .title(staking_status));

        frame.render_widget(table, place);

        Ok(())
    }
}