cmd: planet production

pkg/model/game/ship.go

@@ -43,26 +43,23 @@ type Fleet struct {
 	ShipGroups []ShipGroup `json:"group"`
 }
 
-// TODO: test on real values
 func (st ShipType) EmptyMass() float64 {
-	shipMass := st.DriveMass() + st.ShieldsMass() + st.CargoMass() + st.WeaponsMass()
+	shipMass := st.Drive + st.Shields + st.Cargo + st.WeaponsMass()
 	return shipMass
 }
 
-func (st ShipType) DriveMass() float64 {
-	return st.Drive
-}
-
-func (st ShipType) ShieldsMass() float64 {
-	return st.Shields
-}
-
-func (st ShipType) CargoMass() float64 {
-	return st.Cargo
-}
-
 func (st ShipType) WeaponsMass() float64 {
-	return float64(st.Armament)*(st.Weapons/2) + st.Weapons/2
+	if st.Armament == 0 || st.Weapons == 0 {
+		return 0
+	}
+	return float64(st.Armament+1) * (st.Weapons / 2)
+}
+
+// ProductionCost returns Material (MAT) and Population (POP) to produce this [ShipType]
+func (st ShipType) ProductionCost() (mat float64, pop float64) {
+	mat = st.EmptyMass()
+	pop = mat * 10
+	return
 }
 
 // Грузоподъёмность