use crate::TopBar;
use chrono::{Local, Timelike};
use slint::{ComponentHandle, SharedString, Timer, TimerMode};
use std::time::Duration;

use super::common::run_cmd;

// Format current time as "hh:mm AM"
fn format_time() -> SharedString {
    SharedString::from(Local::now().format("%I:%M %p").to_string())
}

// Start a 1-second timer that updates only when the minute changes
fn start_clock_updater(ui: &TopBar) {
    let weak = ui.as_weak();

    // Update immediately when the bar first appears
    if let Some(ui) = weak.upgrade() {
        ui.set_time_text(format_time());
    }

    // Timer that ticks every second
    let timer = Box::leak(Box::new(Timer::default()));

    timer.start(TimerMode::Repeated, Duration::from_secs(1), move || {
        // Access UI safely through the weak pointer
        if let Some(ui) = weak.upgrade() {
            let now = Local::now();

            // Only update when the minute has rolled over
            if now.second() == 0 {
                ui.set_time_text(format_time());
            }
        }
    });
}

// Public entry point: connect widget events + start clock
pub fn install(ui: &TopBar) {
    let weak = ui.as_weak();

    // When the widget emits show_clock(), run the program
    ui.on_show_clock(move || {
        if weak.upgrade().is_some() {
            run_cmd("xclock");
        }
    });

    // Start the clock updater
    start_clock_updater(ui);
}