// subconscious_screen.rs — F3 subconscious agent overlay

use ratatui::{
    layout::Rect,
    style::{Color, Modifier, Style},
    text::{Line, Span},
    widgets::{Block, Borders, Paragraph, Wrap},
    Frame,
    crossterm::event::KeyCode,
};

use super::{App, ScreenView, screen_legend};

pub(crate) struct SubconsciousScreen {
    selected: usize,
    scroll: u16,
}

impl SubconsciousScreen {
    pub fn new() -> Self {
        Self { selected: 0, scroll: 0 }
    }
}

impl ScreenView for SubconsciousScreen {
    fn label(&self) -> &'static str { "subconscious" }

    fn tick(&mut self, frame: &mut Frame, area: Rect,
            events: &[ratatui::crossterm::event::Event], app: &mut App) {
        for event in events {
            if let ratatui::crossterm::event::Event::Key(key) = event {
                if key.kind != ratatui::crossterm::event::KeyEventKind::Press { continue; }
                match key.code {
                    KeyCode::Up => {
                        self.selected = self.selected.saturating_sub(1);
                    }
                    KeyCode::Down => {
                        self.selected = (self.selected + 1)
                            .min(app.agent_state.len().saturating_sub(1));
                    }
                    KeyCode::PageUp => { self.scroll = self.scroll.saturating_sub(20); }
                    KeyCode::PageDown => { self.scroll += 20; }
                    _ => {}
                }
            }
        }

        let mut lines: Vec<Line> = Vec::new();
        let section = Style::default().fg(Color::Yellow);
        let hint = Style::default().fg(Color::DarkGray).add_modifier(Modifier::ITALIC);

        lines.push(Line::raw(""));
        lines.push(Line::styled("── Subconscious Agents ──", section));
        lines.push(Line::styled("  (↑/↓ select)", hint));
        lines.push(Line::raw(""));

        if app.agent_state.is_empty() {
            lines.push(Line::styled("  (no agents loaded)", hint));
        }

        for (i, snap) in app.agent_state.iter().enumerate() {
            let selected = i == self.selected;
            let prefix = if selected { "▸ " } else { "  " };
            let bg = if selected {
                Style::default().bg(Color::DarkGray)
            } else {
                Style::default()
            };

            let status_spans = if snap.running {
                vec![
                    Span::styled(
                        format!("{}{:<30}", prefix, snap.name),
                        bg.fg(Color::Green),
                    ),
                    Span::styled("●  ", bg.fg(Color::Green)),
                    Span::styled(
                        format!("phase: {}  turn: {}", snap.current_phase, snap.turn),
                        bg,
                    ),
                ]
            } else {
                let ago = snap.last_run_secs_ago
                    .map(|s| {
                        if s < 60.0 { format!("{:.0}s ago", s) }
                        else if s < 3600.0 { format!("{:.0}m ago", s / 60.0) }
                        else { format!("{:.1}h ago", s / 3600.0) }
                    })
                    .unwrap_or_else(|| "never".to_string());
                vec![
                    Span::styled(
                        format!("{}{:<30}", prefix, snap.name),
                        bg.fg(Color::Gray),
                    ),
                    Span::styled("○  ", bg.fg(Color::DarkGray)),
                    Span::styled(
                        format!("idle  last: {}  walked: {}", ago, snap.walked_count),
                        bg.fg(Color::DarkGray),
                    ),
                ]
            };
            lines.push(Line::from(status_spans));
        }

        let block = Block::default()
            .title_top(Line::from(screen_legend()).left_aligned())
            .title_top(Line::from(" subconscious ").right_aligned())
            .borders(Borders::ALL)
            .border_style(Style::default().fg(Color::Cyan));

        let para = Paragraph::new(lines)
            .block(block)
            .wrap(Wrap { trim: false })
            .scroll((self.scroll, 0));
        frame.render_widget(para, area);
    }
}