Partially complete the highlighted card movement

Once I write a "lowest visible card" function, then it should
be easy to do the rest

card_stuffs/src/lib.rs

@@ -218,7 +218,7 @@ pub struct CardAndPosition {
     pos: CardPosition,
 }
 
-#[derive(Debug, PartialEq)]
+#[derive(Debug, PartialEq, Copy, Clone)]
 pub enum CardPosition {
     TopWaste, // I don't think we'd ever interact with anything other than the top of the Waste
     Pile(usize, usize), // (PileNumber, Index)

card_stuffs/src/main.rs

@@ -1,5 +1,6 @@
+use core::panic;
 use std::io;
-use card_stuffs::{self};
+use card_stuffs::{self, CardPosition};
 
 use crossterm::event::{self, Event, KeyCode, KeyEvent, KeyEventKind};
 use ratatui::{
@@ -10,22 +11,35 @@ use ratatui::{
     DefaultTerminal, Frame,
 };
 
-#[derive(Debug, Default)]
+#[derive(Debug)]
 pub struct App {
     cards: card_stuffs::Klondike,
     // There aren't pretty... not sure what else I can do about that though...
-    highlighted_card: Option<card_stuffs::Card>,
+    highlighted_card: card_stuffs::CardPosition,
     // I should think about making this a Vec so I can highlight a whole stack which is about to move
-    selected_card: Option<card_stuffs::Card>,
+    selected_card: Option<card_stuffs::CardPosition>,
     exit: bool,
     show_help: bool,
     show_exit: bool,
 }
 
+impl Default for App {
+    fn default() -> Self {
+        Self {
+            cards: card_stuffs::Klondike::default(),
+            highlighted_card: card_stuffs::CardPosition::Pile(0,0),
+            selected_card: None,
+            exit: false,
+            show_exit: false,
+            show_help: false,
+        }
+    }
+}
+
 const CARD_HEIGHT: u16 = 11;
 const CARD_WIDTH: u16 = 15;
 
-fn draw_waste(cards_in_waste: &Vec<card_stuffs::Card>, area: Rect, frame: &mut Frame) {
+fn draw_waste(cards_in_waste: &Vec<card_stuffs::Card>, area: Rect, frame: &mut Frame, highlight: bool) {
     let horizontal = Layout::horizontal([
         Constraint::Length(3),
         Constraint::Length(3),
@@ -50,7 +64,7 @@ fn draw_waste(cards_in_waste: &Vec<card_stuffs::Card>, area: Rect, frame: &mut F
             w2
         );
         frame.render_widget(
-        card_widget(&cards_in_waste[cards_in_waste.len() - 1], true, false, false),
+        card_widget(&cards_in_waste[cards_in_waste.len() - 1], true, highlight, false),
             top_waste
         );
     } else if cards_in_waste.len() == 2 {
@@ -59,12 +73,12 @@ fn draw_waste(cards_in_waste: &Vec<card_stuffs::Card>, area: Rect, frame: &mut F
             w2
         );
         frame.render_widget(
-        card_widget(&cards_in_waste[cards_in_waste.len() - 1], true, false, false),
+        card_widget(&cards_in_waste[cards_in_waste.len() - 1], true, highlight, false),
             top_waste
         );
     } else if cards_in_waste.len() == 1 {
         frame.render_widget(
-        card_widget(&cards_in_waste[cards_in_waste.len() - 1], true, false, false),
+        card_widget(&cards_in_waste[cards_in_waste.len() - 1], true, highlight, false),
             top_waste
         );
     }
@@ -160,7 +174,7 @@ impl App {
             deck_area
         );
 
-        draw_waste(&self.cards.waste, waste_area, frame);
+        draw_waste(&self.cards.waste, waste_area, frame, self.highlighted_card == CardPosition::TopWaste);
 
         for fa in foundation_areas {
             frame.render_widget(
@@ -206,8 +220,8 @@ impl App {
                     None => break,
                     Some(c) => {
                         let is_top_card = i == self.cards.piles[pile].len() - 1;
-                        let highlight = self.highlighted_card.is_some() && *c == self.highlighted_card.unwrap();
+                        let highlight = self.highlighted_card == CardPosition::Pile(pile, i);
-                        let selected = self.selected_card.is_some() && *c == self.selected_card.unwrap();
+                        let selected = true; // FIXME
                         let a_card = match c.visible {
                             true => card_widget(c, is_top_card, highlight, selected),
                             false => card_widget(c, is_top_card, highlight, selected),
@@ -253,6 +267,10 @@ impl App {
             KeyCode::Char('1') => self.cards.num_cards_turned = 1,
             KeyCode::Char('3') => self.cards.num_cards_turned = 3,
             KeyCode::Char('h') => self.show_help = !self.show_help, // toggle
+            KeyCode::Left => self.highlighted_card = handle_move_highlighted(&self.highlighted_card, Direction::Left),
+            KeyCode::Right => self.highlighted_card = handle_move_highlighted(&self.highlighted_card, Direction::Right),
+            KeyCode::Up => self.highlighted_card = handle_move_highlighted(&self.highlighted_card, Direction::Up),
+            KeyCode::Down => self.highlighted_card = handle_move_highlighted(&self.highlighted_card, Direction::Down),
             _ => {}
         }
     }
@@ -269,6 +287,50 @@ fn main() -> io::Result<()> {
     app_result
 }
 
+enum Direction {
+    Up,
+    Down,
+    Left,
+    Right,
+}
+
+fn handle_move_highlighted(current_position: &CardPosition, direction: Direction) -> CardPosition {
+    match current_position {
+        CardPosition::TopWaste => {
+            match direction {
+                Direction::Up | Direction::Left => { CardPosition::TopWaste },
+                Direction::Right => { CardPosition::Foundation(0) }
+                Direction::Down => { CardPosition:: Pile(0, 0) }
+            }
+        },
+        CardPosition::Pile(p, i) => {
+            *current_position // FIXME
+        },
+        CardPosition::Foundation(f) => {
+            match direction {
+                Direction::Up => { CardPosition::Foundation(*f) },
+                Direction::Left => {
+                    if *f == 0 { CardPosition::TopWaste }
+                    else { CardPosition::Foundation(f - 1) } 
+                },
+                Direction::Right => {
+                    if *f >= 3 { CardPosition::Foundation(3) }
+                    else { CardPosition::Foundation(*f + 1)}
+                }
+                Direction::Down => {
+                    match f {
+                        0 => *current_position, // FIXME - need a "lowest visible card" function - also need to pass more info into here
+                        1 => *current_position,
+                        2 => *current_position,
+                        3 => *current_position,
+                        _ => panic!("Should be on a higher foundation")
+                    }
+                }
+            }
+        }
+    }
+}
+
 fn show_help(frame: &mut Frame, area: &Rect) {
     let block = Block::bordered().title("Help");
     let text =