use std::error::Error;

use ratatui::{
    Frame, Terminal,
    layout::{
        Alignment,
        Constraint::{Length, Min, Percentage},
        Layout,
    },
    widgets::{Block, Borders, Gauge},
};

pub fn draw_ui<B: ratatui::backend::Backend>(
    terminal: &mut Terminal<B>,
) -> Result<(), Box<dyn Error>> {
    terminal.draw(draw)?;
    Ok(())
}

fn draw(frame: &mut Frame) {
    let main_layout = Layout::vertical([Length(1), Min(0), Length(1)]);
    let [title_bar, app_area, status_bar] = main_layout.areas(frame.area());
    let title_block = Block::new().borders(Borders::TOP).title("Pomodoro Timer");
    let status_block = Block::new()
        .borders(Borders::TOP)
        .title("By: Wesley Irvin (c) 2025")
        .title_alignment(Alignment::Right);

    frame.render_widget(title_block, title_bar);
    frame.render_widget(status_block, status_bar);

    let timer_layout = Layout::vertical([Percentage(65), Percentage(35)]);
    let [pomodoro_area, utilities_area] = timer_layout.areas(app_area);
    let timer_label = format!("{}:{} / 25:00", 17, 32);
    let timer_ratio = (17 * 60 + 32) as f64 / (25 * 60) as f64;
    let pomodoro_timer = Gauge::default()
        .block(Block::bordered().title("Pomodoro"))
        .label(timer_label)
        .ratio(timer_ratio);

    frame.render_widget(pomodoro_timer, pomodoro_area);

    let utilities_layout = Layout::horizontal([Percentage(75), Percentage(25)]);
    let [pomodori, controls] = utilities_layout.areas(utilities_area);

    let pomodori_completed = Gauge::default()
        .block(Block::bordered().title("Pomodori"))
        .label("3 / 4")
        .ratio(0.75);
    let controls_block = Block::bordered().title("Controls");

    frame.render_widget(pomodori_completed, pomodori);
    frame.render_widget(controls_block, controls);
}