Drain charge when using defense mode.

src/kani.lua

@@ -74,8 +74,7 @@ end
 
 function Kani:chargeReserve(change)
    if change <= 0 then return end
-   self.reserveCharge = math.min(self.reserveCharge + change / self.chargeFactor, 100)
-   self.ui.chargeMeter:setValue(self.reserveCharge)
+   self:setReserveCharge(math.min(self.reserveCharge + change / self.chargeFactor, 100))
 end
 
 function Kani:chargeShot()
@@ -91,13 +90,21 @@ function Kani:chargeShot()
    local effectiveCharge = math.ceil(self.reserveCharge)
 
    if effectiveCharge >= requiredPower then
-      self.reserveCharge = effectiveCharge - requiredPower
-      self.weaponPower += 1
-      self.ui.chargeMeter:setValue(self.reserveCharge)
-      self.ui.weaponPowerMeter:setValue(self.weaponPower-1)
+      self:setReserveCharge(effectiveCharge - requiredPower)
+      self:setWeaponPower(self.weaponPower+1)
    end
 end
 
+function Kani:setReserveCharge(newCharge)
+   self.reserveCharge = newCharge
+   self.ui.chargeMeter:setValue(self.reserveCharge)
+end
+
+function Kani:setWeaponPower(newPwr)
+   self.weaponPower = newPwr
+   self.ui.weaponPowerMeter:setValue(math.max(self.weaponPower-1, 0))
+end
+
 function Kani:fire()
    self.firingTimer:remove()
 
@@ -113,8 +120,7 @@ function Kani:fire()
    )
    bullet:moveTo(self.x+16, self.y)
    bullet:add()
-   self.weaponPower = 0
-   self.ui.weaponPowerMeter:setValue(0)
+   self:setWeaponPower(0)
 end
 
 function Kani:damage(amount)
@@ -146,7 +152,9 @@ function Kani:runReady()
    end
 
    local change = select(1, playdate.getCrankChange())
-   self:chargeReserve(change)
+   if not playdate.buttonIsPressed(playdate.kButtonA) then
+      self:chargeReserve(change)
+   end
 
    if playdate.buttonJustPressed(playdate.kButtonA) then
       self.firingTimer = playdate.timer.keyRepeatTimerWithDelay(self.weaponChargeSpeed / 2,
@@ -158,7 +166,6 @@ function Kani:runReady()
    end
 
    if playdate.buttonIsPressed(playdate.kButtonB) then
-      print("Triggering entrance to DEFEND mode")
       self.fsm:changeState("DEFEND")
    end
 
@@ -180,5 +187,8 @@ end
 function Kani:runDefend()
    if not playdate.buttonIsPressed(playdate.kButtonB) then
       self.fsm:changeState("READY")
+      return
    end
+
+   self:setReserveCharge(self.reserveCharge - 1)
 end