//! Clock module: subscribes to second ticks, renders the time in the bar.
//! Left-click toggles the seconds suffix; right-click opens a popup with
//! the current time in large text.

use iced::widget::{container, mouse_area, text};
use iced::{Element, Task};

use common::{BarModule, ClockKind, ClockPayload, ModuleEffect, ModuleMsg, Service};

/// Big-text popup size (logical px).
const POPUP_W: u32 = 360;
const POPUP_H: u32 = 160;

/// A module-local message for the clock.
#[derive(Clone)]
pub enum ClockMsg {
    /// Toggle the seconds suffix.
    ToggleSeconds,
    /// Open the big-time popup.
    OpenPopup,
}

pub struct Clock {
    value: String,
    show_seconds: bool,
}

impl Clock {
    pub fn new() -> Self {
        Self {
            value: "--:--:--".to_string(),
            show_seconds: true,
        }
    }

    /// Display string: HH:MM:SS, or HH:MM when seconds are hidden.
    fn shown(&self) -> String {
        if self.show_seconds {
            self.value.clone()
        } else {
            self.value
                .split(':') // [hh, mm, ss]
                .take(2)
                .collect::<Vec<_>>()
                .join(":")
        }
    }
}

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

impl BarModule for Clock {
    fn id(&self) -> &'static str {
        "clock"
    }

    fn view(&self, window_id: Option<iced::window::Id>) -> Element<'_, ModuleMsg> {
        match window_id {
            // Popup surface: current time in large text.
            Some(_) => container(text(&self.value).size(56)).padding(20).into(),
            // Bar surface: clickable time. Container carries the module id
            // so the popup can anchor to these bounds.
            None => container(
                mouse_area(text(self.shown()).size(16))
                    .on_press(ModuleMsg::new(self.id(), ClockMsg::ToggleSeconds))
                    .on_right_press(ModuleMsg::new(self.id(), ClockMsg::OpenPopup)),
            )
            .id(iced::widget::Id::from(self.id()))
            .into(),
        }
    }

    fn update(&mut self, msg: ModuleMsg) -> Task<ModuleEffect> {
        // Subscription fan-out delivers a raw `ClockPayload`, not `ClockMsg`.
        if let Some(payload) = msg.downcast::<ClockPayload>() {
            self.value = payload.value.clone();
            return Task::none();
        }
        match msg.downcast::<ClockMsg>() {
            Some(ClockMsg::ToggleSeconds) => {
                self.show_seconds = !self.show_seconds;
                Task::none()
            }
            Some(ClockMsg::OpenPopup) => Task::done(ModuleEffect::RequestPopup(
                self.id().to_string(),
                self.id().to_string(),
            )),
            None => Task::none(),
        }
    }

    fn services(&self) -> Vec<Service> {
        vec![Service::Clock(ClockKind::Seconds)]
    }

    fn popup_size(&self) -> Option<(u32, u32)> {
        Some((POPUP_W, POPUP_H))
    }
}