Add flight turn and distance calculations

strategies/simple.go

@@ -3,13 +3,14 @@ package strategies
 import (
 	"botg/models"
 	"fmt"
+	"math"
 )
 
 type SimpleStrategy struct {
 
 }
 
-func (s SimpleStrategy) Execute(stars[] models.Star, flights[] models.Flight, links[] models.Link) {
+func (s *SimpleStrategy) Execute(stars[] models.Star, flights[] models.Flight, links[] models.Link) {
 	total := 0
 
 	for i, s := range stars {
@@ -48,7 +49,7 @@ func (s SimpleStrategy) Execute(stars[] models.Star, flights[] models.Flight, li
 
 			// Fly to this target, and skip processing all remaining potential target stars
 			fmt.Printf("fly %d %d %d\n", i, j, s.Ships / 2)
-			total += 1
+			total++
 			break
 		}
 
@@ -60,3 +61,22 @@ func (s SimpleStrategy) Execute(stars[] models.Star, flights[] models.Flight, li
 
 	fmt.Println("done")
 }
+
+func flightTurnDistance(x, y int, star *models.Star) int {
+	pointDistance := distanceBetweenPoints(x, y, star.X, star.Y)
+
+	if pointDistance == 0 {
+		return 0
+	}
+
+	return int(math.Ceil(pointDistance / 10))
+}
+
+func distanceBetweenPoints(x1, y1, x2, y2 int) float64 {
+	// Is it the same point? The distance is defined as 0
+	if x1 == x2 && y1 == y2 {
+		return 0
+	}
+
+	return math.Sqrt(math.Pow(float64(x1 - x2), 2) + math.Pow(float64(y1 - y2), 2))
+}