more broken

src/battlesnake.rs

@@ -40,6 +40,20 @@ pub struct Coord {
     pub y: usize,
 }
 
+pub struct Line<'a> {
+    pub start: &'a Coord,
+    pub end: &'a Coord,
+}
+
+impl Line {
+    fn manhattan<'a>(self: &'a Line) -> u32 {
+        let abs_x = (self.end.x as i32 - self.start.y as i32).abs();
+        let abs_y = (self.end.y as i32 - self.start.y as i32).abs();
+
+        (abs_x - abs_y) as u32
+    }
+}
+
 #[derive(Default, Debug, Clone, PartialEq, serde_derive::Serialize, serde_derive::Deserialize)]
 pub struct Snake {
     pub id: String,

src/main.rs

@@ -33,29 +33,26 @@ fn make_move(msg: Json<battlesnake::SnakeRequest>) -> Json<battlesnake::MoveResp
     let mut g = Grid::new(msg.board.height, msg.board.width);
     g.fill();
 
-    for sn in &msg.board.snakes {
-        for bd in &sn.body {
-            g.remove_vertex((bd.x, bd.y))
-        }
-    }
-
     let target = find_target(&msg, &g);
+    println!("{:?}", target);
+
+    
 
     // do pathfinding?
 
-    battlesnake::MoveResponse {
+    Json(battlesnake::MoveResponse {
         move_field: "up".to_string(),
-    }
+    })
 }
 
-fn find_target(gs: &battlesnake::SnakeRequest, g: &Grid) -> &battlesnake::Coord {
-    let head = gs.you.body[0];
+fn find_target<'a>(gs: &'a battlesnake::SnakeRequest, g: &Grid) -> &'a battlesnake::Coord {
+    let head = &gs.you.body[0];
     if gs.you.health > 30 {
-        let mut lowestScore: usize = 99999;
-        let mut coord: &battlesnake::Coord;
+        let mut lowestScore: u32 = 99999;
+        let mut coord: &battlesnake::Coord = &gs.you.body.last().unwrap();
 
         for food in &gs.board.food {
-            let score = g.distance(&(head.x, head.y), &(food.x, food.y));
+            let score = battlesnake::Line{start: head, end: food}.manhattan();
             if score < lowestScore {
                 lowestScore = score;
                 coord = food;
@@ -73,5 +70,6 @@ fn main() {
         index,
         begin,
         ping,
+        make_move,
     ]).launch();
 }