use ratatui::{
    Frame,
    layout::{Constraint, Direction, Layout},
    style::{Color, Style},
    text::{Line, Span},
    widgets::Paragraph,
};

use crate::tui::views::{draw_dashboard, draw_execution, draw_planning};
use crate::tui::widgets::{TabBar, draw_help, draw_side_panel};
use crate::tui::{ActiveTab, App};

pub fn draw(frame: &mut Frame, app: &mut App) {
    let chunks = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Length(1), // Tab bar
            Constraint::Min(0),    // Main content
            Constraint::Length(1), // Status bar
        ])
        .split(frame.area());

    // Tab bar
    frame.render_widget(TabBar::new(app.active_tab), chunks[0]);

    // Main content area
    match app.active_tab {
        ActiveTab::Dashboard => {
            draw_dashboard(frame, chunks[1], &app.dashboard);
        }
        ActiveTab::Planning => {
            draw_planning(frame, chunks[1], &mut app.planning, app.spinner.current());
        }
        ActiveTab::Execution => {
            draw_execution(frame, chunks[1], &mut app.execution, app.spinner.current());
        }
    }

    // Side panel (rendered on top of main content)
    draw_side_panel(frame, chunks[1], &app.side_panel);

    // Help overlay (rendered on top of everything)
    if app.help.visible {
        draw_help(frame, frame.area());
    }

    // Status bar
    let status = Line::from(vec![Span::raw(
        " q quit │ 1/2/3 switch tabs │ Tab cycle │ ? help ",
    )]);
    let status_bar = Paragraph::new(status).style(Style::default().bg(Color::DarkGray));
    frame.render_widget(status_bar, chunks[2]);
}