use ratatui::Frame;
use ratatui::layout::Rect;
use ratatui::style::{Color, Modifier, Style};
use ratatui::text::{Line, Span};
use ratatui::widgets::{Block, Borders, List, ListItem};

use crate::app::AppState;

pub fn render(f: &mut Frame, state: &AppState, area: Rect) {
    let items: Vec<ListItem> = if state.scheduled_tasks.is_empty() {
        vec![ListItem::new(Line::from(Span::styled(
            "  No scheduled tasks. Press T to refresh.",
            Style::default().fg(Color::DarkGray),
        )))]
    } else {
        state
            .scheduled_tasks
            .iter()
            .enumerate()
            .map(|(i, task)| {
                let is_selected = state.scheduled_tasks_selected == Some(i);
                let enabled_marker = if task.enabled { "[ON] " } else { "[OFF]" };
                let enabled_color = if task.enabled {
                    Color::Green
                } else {
                    Color::DarkGray
                };

                let last_run = task
                    .last_run
                    .as_deref()
                    .map(super::format_date)
                    .unwrap_or("-");
                let next_run = task
                    .next_run
                    .as_deref()
                    .map(super::format_date)
                    .unwrap_or("-");
                let status = task.last_status.as_deref().unwrap_or("-");
                // Show abbreviated task ID (first 8 chars)
                let task_id_short = if task.id.len() > 8 {
                    &task.id[..8]
                } else {
                    &task.id
                };

                let text = format!(
                    " {enabled_marker} [{task_id_short}] {:<20} {:<16} Last: {:<12} Next: {:<12} Status: {}",
                    task.name, task.schedule, last_run, next_run, status
                );

                let style = if is_selected {
                    Style::default()
                        .fg(Color::Cyan)
                        .add_modifier(Modifier::BOLD)
                } else {
                    Style::default().fg(enabled_color)
                };

                ListItem::new(Line::from(Span::styled(text, style)))
            })
            .collect()
    };

    let title = format!(" Scheduled Tasks ({}) ", state.scheduled_tasks.len());
    let list = List::new(items).block(Block::default().borders(Borders::ALL).title(title));

    f.render_widget(list, area);
}