Added recoil, drain, and critical hits

FakeMon/src/mon/Game.scala

@@ -21,8 +21,8 @@ object Game {
     implicit val rng = new scala.util.Random()
     val form1 = Form("Diabolo")
     val form2 = Form("Chanilla")
-    val movepool1 = IndexedSeq(Move("Poison Sting"))
+    val movepool1 = IndexedSeq(Move("Frost Breath"))
-    val movepool2 = IndexedSeq(Move("Poison Sting"))
+    val movepool2 = IndexedSeq(Move("Absorb"))
     val party1 = new Party(null, new Monster(new StorageMon("Allied Mon", Gene.randomGene(null, form1), form1, Statistic.emptyEvs, movepool1)), IndexedSeq())
     val party2 = new Party(null, new Monster(new StorageMon("Wild Mon", Gene.randomGene(null, form2), form2, Statistic.emptyEvs, movepool2)), IndexedSeq())
     val engine = new BattleEngine(party1, party2)

FakeMon/src/mon/battle/BattleEngine.scala

@@ -26,25 +26,41 @@ class BattleEngine(val player : Party, val enemy : Party)(implicit val rng : Ran
     val user = action.user
     val move = action.move
     val target = action.target
+    if (user.isAlive) {
       println(s"$user used $move.")
       if (attackRoll(user, move, target)) {
         if (move.pow > 0 || move.powCallback != null) {
           val dmg = damageRoll(user, move, target)
-        target.takeDamage(dmg)
+          val actualDmg = target.takeDamage(dmg)
-        println(s"$target takes $dmg damage!")
+          if (dmg == actualDmg) {
+            println(s"$target takes $actualDmg damage!")
+          } else {
+            println(s"$target takes $actualDmg (+${dmg - actualDmg} overkill) damage!")
+          }
+          if (move.drain > 0.frac) {
+            val healing = Math.max(move.drain * actualDmg, 1)
+            user.recoverDamage(healing)
+            println(s"$user recovered $healing damage.")
+          } else if (move.drain < 0.frac) {
+            val recoil = Math.max(-move.drain * actualDmg, 1)
+            user.takeDamage(recoil)
+            println(s"$user took $recoil damage from recoil!")
+          }
+          if (!user.isAlive) {
+            println(s"$user fainted!")
+          }
+          if (!target.isAlive) {
+            println(s"$target fainted!")
+          }
         }
         applyBoosts(target, move.boosts)
+        applyStatus(target, move.status)
         // TODO : Secondary effects
         if (move.selfEffect != null) {
-        applyBoosts(user, move.selfEffect.boosts)
+          applyEffect(user, move.selfEffect)
         }
         if (move.secondary != null && rng.chance(move.secondary.chance.%%)) {
-        applyBoosts(target, move.secondary.boosts)
+          applyEffect(target, move.secondary)
-        if (move.secondary.status != null && target.status == None) {
-          // apply status
-          target.status = Some(move.secondary.status)
-          move.secondary.status.onStart.map(_(target))
-        }
         }
 
         // TODO : Support moves
@@ -53,6 +69,7 @@ class BattleEngine(val player : Party, val enemy : Party)(implicit val rng : Ran
         println("Missed!")
       }
     }
+  }
 
   def attackRoll(user: Monster, move: Move, target: Monster) = {
     if (move.accuracy == 0) {
@@ -71,10 +88,11 @@ class BattleEngine(val player : Party, val enemy : Party)(implicit val rng : Ran
     // TODO : Fixed damage
     val pow = if (move.powCallback != null) move.powCallback(user, target) else move.pow
     val baseDmg = (2 * user.level / 5 + 2) * pow * user(atkStat) / (target(defStat) * 50) + 2
-    val multiplier = target.effectiveness(move.element)
+    val effectiveness = target.effectiveness(move.element)
-    if (multiplier > 1.0) {
+    val multiplier = effectiveness * critMultiplier(user, move, target)
+    if (effectiveness > 1.0) {
       println("It's super effective!")
-    } else if (multiplier < 1.0) {
+    } else if (effectiveness < 1.0) {
       println("It's not very effective.")
     }
     val maxDmg = (baseDmg * multiplier).toInt
@@ -82,14 +100,45 @@ class BattleEngine(val player : Party, val enemy : Party)(implicit val rng : Ran
     rng.nextInt(minDmg, maxDmg)
   }
   
+  def critMultiplier(user : Monster, move : Move, target: Monster) = {
+    // Percentage chance is different from Pokemon
+    val stage = move.crit
+    val chance = (1 << stage) \ 16 // Doubles per stage
+    if (rng.chance(chance)) {
+      println("A critical hit!")
+      1.5
+    } else {
+      1.0
+    }
+  }
+
+  def applyEffect(target: Monster, effect: Secondary) {
+    applyBoosts(target, effect.boosts)
+    applyStatus(target, effect.status)
+  }
+
+  def applyStatus(target: Monster, status: Status) {
+    if (target.isAlive) {
+      if (status != null && target.status == None) {
+        // apply status
+        target.status = Some(status)
+        status.onStart.map(_(target))
+      }
+    }
+  }
+
   def applyBoosts(target: Monster, boosts: Map[Stat, Int]) {
-    boosts.foreach{case (s, b) => {
+    if (target.isAlive) {
+      boosts.foreach {
+        case (s, b) => {
           target.applyBoost(s, b)
           if (b > 0) {
             println(s"$target's $s rose!")
           } else if (b < 0) {
             println(s"$target's $s fell!")
           }
-    }}
+        }
+      }
+    }
   }
 }

FakeMon/src/mon/stat/Monster.scala

@@ -26,8 +26,10 @@ class Monster(val base : StorageMon) {
   def elements = base.form.elements
   
   
-  def takeDamage(dmg : Int) {
+  def takeDamage(dmg : Int) : Int = {
-    hp = Math.max(0, hp - dmg)
+    val actualDmg = Math.min(hp, dmg)
+    hp -= actualDmg
+    actualDmg
   }
   
   def recoverDamage(healing : Int) {

FakeMon/src/mon/stat/Move.scala

@@ -7,7 +7,7 @@ import com.fasterxml.jackson.module.scala.JsonScalaEnumeration
 
 import scala.io.Source
 
-import mon.util.{TypeReference, YamlHelper}
+import mon.util._
 
 object MoveType extends Enumeration {
   val Physical, Special, Status = Value
@@ -33,6 +33,8 @@ abstract class Move {
   val target : Target
   val boosts : Map[Stat, Int]
   val crit : Int
+  val status : Status
+  val drain : Fraction
   val selfEffect : Secondary
   val secondary: Secondary
   // boosts
@@ -57,11 +59,14 @@ case class MoveToken(
     val pp : Int,
     val `type` : String,
     val flags : Map[String, Int],
+    val status : String,
     val self : SecondaryToken,
     val secondary : SecondaryToken,
+    val drain : Fraction,
+    val recoil : Fraction,
     @JsonScalaEnumeration(classOf[TargetType]) val target : Target = Target.Normal,
     val boosts : Map[String, Int] = Map(),
-    val crit : Int = 0) {
+    val critRatio : Int = 0) {
   
   def instantiate() = {
     val token = this
@@ -78,7 +83,9 @@ case class MoveToken(
       val flags = token.flags.keySet
       val target = token.target
       val boosts = if (token.boosts != null) token.boosts.map{case (s, i) => (Statistic(s), i)} else Map()
-      val crit = token.crit
+      val crit = token.critRatio
+      val status = if (token.status != null) Status(token.status) else null
+      val drain = if (token.drain != null) token.drain else if (token.recoil != null) -token.recoil else 0 \ 1
       val selfEffect = if (token.self != null) token.self.instantiate() else null
       val secondary = if (token.secondary != null) token.secondary.instantiate() else null
     }

FakeMon/src/mon/stat/data/moves.yaml

@@ -1,3 +1,24 @@
+- name: "Absorb"
+  num: 71
+  accuracy: 100
+  basePower: 20
+  category: "Special"
+  desc: "The user recovers 1/2 the HP lost by the target, rounded half up. If Big Root is held by the user, the HP recovered is 1.3x normal, rounded half down."
+  shortDesc: "User recovers 50% of the damage dealt."
+  id: "absorb"
+  pp: 25
+  priority: 0
+  flags:
+    protect: 1
+    mirror: 1
+    heal: 1
+  drain: {num: 1, denom: 2}
+  secondary: null
+  target: "Normal"
+  type: "Grass"
+  zMovePower: 100
+  contestType: "Clever"
+
 - name: Aqua Jet
   num: 453
   accuracy: 100
@@ -85,7 +106,7 @@
   self:
     boosts:
       pdef: -1
-      spd: -1
+      mdef: -1
   secondary: null
   target: "Normal"
   type: "Fighting"
@@ -126,6 +147,24 @@
   zMovePower: 160
   contestType: "Cool"
   
+- name: "Frost Breath"
+  num: 524
+  accuracy: 90
+  basePower: 60
+  category: "Special"
+  desc: "This move is always a critical hit unless the target is under the effect of Lucky Chant or has the Battle Armor or Shell Armor Abilities."
+  shortDesc: "Always results in a critical hit."
+  id: "frostbreath"
+  pp: 10
+  priority: 0
+  flags: {protect: 1, mirror: 1}
+  critRatio: 4
+  secondary: null
+  target: "Normal"
+  type: "Ice"
+  zMovePower: 120
+  contestType: "Beautiful"
+  
 - name: "Poison Gas"
   num: 139
   accuracy: 90
@@ -211,3 +250,24 @@
   type: Normal
   zMovePower: 100
   contestType: Tough
+  
+- name: "Volt Tackle"
+  num: 344
+  accuracy: 100
+  basePower: 120
+  category: "Physical"
+  desc: "Has a 10% chance to paralyze the target. If the target lost HP, the user takes recoil damage equal to 33% the HP lost by the target, rounded half up, but not less than 1 HP."
+  shortDesc: "Has 33% recoil. 10% chance to paralyze target."
+  id: "volttackle"
+  isViable: true
+  pp: 15
+  priority: 0
+  flags: {contact: 1, protect: 1, mirror: 1}
+  recoil: {num: 33, denom: 100}
+  secondary:
+    chance: 10
+    xstatus: 'par'
+  target: "Normal"
+  type: "Electric"
+  zMovePower: 190
+  contestType: "Cool"

FakeMon/src/mon/util/Fraction.scala

@@ -1,11 +1,18 @@
 package mon.util
 
-case class Fraction(val num : Int, val denom : Int) {
+case class Fraction(val num : Int, val denom : Int) extends Ordered[Fraction] {
   def *(f : Fraction) = Fraction(num * f.num, denom * f.denom)
   def *(x : Int) : Int = x * num / denom
+  
+  def unary_-() : Fraction = Fraction(-num, denom)
+  
+  override def compare(f : Fraction) : Int = {
+    (num * f.denom) compare (f.num * denom)
+  }
 }
 
 class IntFraction(val x : Int) extends AnyVal {
   def %% = Fraction(x, 100)
   def \ (denom : Int) = Fraction(x, denom)
+  def frac = Fraction(x, 1)
 }

FakeMon/src/mon/util/package.scala

@@ -41,4 +41,6 @@ package object util {
   implicit def filename2InputStream(filename : String) : BufferedInputStream = {
     new BufferedInputStream(new FileInputStream(filename))
   }
+  
+  implicit def int2Helper(x : Int) = new IntFraction(x)
 }