Add evaluate() function that combines the eval fn's with weights

fish/src/eval.rs

@@ -5,6 +5,31 @@ mod downstacking;
 
 pub use downstacking::mystery_mdse;
 
+pub fn evaluate(mat: &Mat, pcnt: usize) -> i32 {
+    // TODO: public interface for weights etc.
+
+    struct Weights {
+        height: i32,
+        i_deps: i32,
+        mdse: i32,
+        pcnt: i32,
+    }
+
+    const W: Weights = Weights {
+        height: 5,
+        i_deps: 10,
+        mdse: 10,
+        pcnt: 10,
+    };
+
+    let mut rating = 0;
+    rating += max_height(mat) * W.height;
+    rating += i_deps(mat) * W.i_deps;
+    rating += mystery_mdse(mat) * W.mdse;
+    rating += (pcnt as i32) * W.pcnt;
+    rating
+}
+
 pub fn max_height(matrix: &Mat) -> i32 {
     matrix.rows() as i32
 }