impl Battle::Engine::exec()

src/purerust/src/src.rs

@@ -5,6 +5,7 @@ pub mod mon {
       pub hp: i32,
       pub atk: i32,
       pub def: i32,
+      pub spd: i32,
    }
 
    #[cfg(test)]
@@ -18,6 +19,7 @@ pub mod mon {
             hp: 1,
             atk: 2,
             def: 3,
+            spd: 4,
          };
       }
    }
@@ -42,12 +44,14 @@ pub mod mon {
                hp: 10,
                atk: 11,
                def: 9,
+               spd: 11,
             },
             Dex::Mari => Species{
                name: "Mari".to_string(),
                hp: 10,
                atk: 8,
                def: 12,
+               spd: 9,
             },
          }
       }
@@ -67,6 +71,7 @@ pub mod mon {
       }
    }
 
+   #[derive(Clone, Debug)]
    pub struct Instance {
       pub species: Species,
       pub damage: i32,
@@ -94,44 +99,203 @@ pub mod mon {
    }
 }
 
-pub mod battler {
+pub mod battle {
    use super::*;
 
-   pub fn attack(w: &mut mon::Instance, r: &mut mon::Instance) {
-      let atk_delta = r.species.atk - 10;
-      let def_delta = w.species.def - 10;
+   pub struct Engine {
+      teams: Vec<Team>,
+      q: Vec<Move>,
+   }
 
-      let power = match atk_delta - def_delta {
-         v if v < 1 => 1,
-         v => v,
-      };
+   impl Engine {
+      pub fn new(first: Vec<mon::Instance>, second: Vec<mon::Instance>) -> Engine {
+         let mut result = Self{
+            teams: vec![],
+            q: vec![],
+         };
+         result.join(first);
+         result.join(second);
+         result
+      }
 
-      w.damage = match w.damage + power {
-         v if v < w.species.hp => v,
-         _ => w.species.hp,
-      };
+      pub fn join(&mut self, third: Vec<mon::Instance>) {
+         self.teams.push(Team::new(third));
+      }
+
+      pub fn enqueue(&mut self, m: Move) {
+         self.q.push(m);
+      }
+
+      pub fn exec(&mut self) {
+         self.turn_order().iter().for_each(|idx| {
+            match self.q[*idx].clone() {
+               Move::Pass(_) => {},
+               Move::Attack(rIdx, wIdx) => {
+                  let r = self.teams[rIdx.team].mons[rIdx.mon].clone();
+                  if r.can_attack() {
+                     let w = self.teams[wIdx.team].mons[wIdx.mon].clone();
+                     if w.can_be_attacked() {
+                        self.teams[wIdx.team].mons[wIdx.mon].mon = Engine::attack(&w.mon, &r.mon);
+                     }
+                  }
+               },
+            };
+         });
+         self.new_turn();
+      }
+
+      fn new_turn(&mut self) {
+         self.q = vec![];
+      }
+
+      fn turn_order(&self) -> Vec<usize> {
+         let mut order = vec![];
+         for i in 0..self.q.len() {
+            order.push((i, match &self.q[i] {
+               Move::Pass(_) => 0,
+               Move::Attack(w, _) => self.teams[w.team].mons[w.mon].mon.species.spd,
+            }));
+         }
+         order.sort_unstable_by(|a, b| a.1.cmp(&b.1));
+         order.iter().map(|x| x.0).collect()
+      }
+
+      fn attack(w: &mon::Instance, r: &mon::Instance) -> mon::Instance {
+         let mut w = w.clone();
+         let atk_delta = r.species.atk - 10;
+         let def_delta = w.species.def - 10;
+
+         let power = match atk_delta - def_delta {
+            v if v < 1 => 1,
+            v => v,
+         };
+
+         w.damage = match w.damage + power {
+            v if v < w.species.hp => v,
+            _ => w.species.hp,
+         };
+
+         w
+      }
    }
 
    #[cfg(test)]
-   mod species_tests {
+   mod engine_tests {
       use super::*;
 
+      #[test]
+      fn test_new() {
+         let mut engine = Engine::new(team_a(), team_b());
+         engine.join(team_b());
+      }
+
       #[test]
       fn test_attack() {
          let mut pika = mon::Instance::roll(mon::Dex::Pika);
          let mut mari = mon::Instance::roll(mon::Dex::Mari);
 
-         attack(&mut pika, &mut mari);
+         pika = Engine::attack(&mut pika, &mut mari);
          assert_eq!(1, pika.damage);
 
-         attack(&mut mari, &mut pika);
+         mari = Engine::attack(&mut mari, &mut pika);
          assert_eq!(1, mari.damage);
 
          for _ in 0..pika.species.hp+5 {
-            attack(&mut pika, &mut mari);
+            pika = Engine::attack(&mut pika, &mut mari);
          }
          assert_eq!(pika.species.hp, pika.damage);
          assert_eq!(1, mari.damage);
       }
+      
+      #[test]
+      fn test_turn() {
+         let mut engine = Engine::new(team_a(), team_b());
+         engine.join(team_b());
+
+         // player 0 mon 0 attacks team 1 mon 0
+         engine.enqueue(Move::Attack(Idx{team: 0, mon: 0}, Idx{team: 1, mon: 0}));
+         // player 1 mon 0 passes
+         engine.enqueue(Move::Pass(Idx{team: 1, mon: 0}));
+         // player 1 mon 1 not out
+         engine.exec();
+
+         assert_eq!(0, engine.teams[0].mons[0].mon.damage);
+         assert_eq!(1, engine.teams[1].mons[0].mon.damage);
+         assert_eq!(0, engine.teams[1].mons[1].mon.damage);
+      }
+
+      fn team_a() -> Vec<mon::Instance> {
+         vec![mon::Instance::roll(mon::Dex::Pika)]
+      }
+
+      fn team_b() -> Vec<mon::Instance> {
+         vec![mon::Instance::roll(mon::Dex::Mari), mon::Instance::roll(mon::Dex::Pika)]
+      }
+   }
+
+   #[derive(Debug)]
+   struct Team {
+      mons: Vec<Instance>,
+   }
+
+   impl Team {
+      fn new(mons: Vec<mon::Instance>) -> Self {
+         assert!(mons.len() > 0);
+         let mut mons: Vec<_> = mons.iter().map(|m| Instance{mon: m.clone(), out: false}).collect();
+         mons[0].out = true;
+         Self{mons: mons}
+      }
+   }
+
+   #[derive(Clone, Debug)]
+   struct Instance {
+      mon: mon::Instance,
+      out: bool,
+   }
+
+   impl Instance {
+      fn alive(&self) -> bool {
+         self.mon.damage < self.mon.species.hp
+      }
+
+      fn can_attack(&self) -> bool {
+         self.out && self.alive()
+      }
+
+      fn can_be_attacked(&self) -> bool {
+         self.out && self.alive()
+      }
+   }
+
+   #[cfg(test)]
+   mod instance_tests {
+      use super::*;
+
+      #[test]
+      fn test_checks() {
+         let mut i = Instance{
+            mon: mon::Instance::roll(mon::Dex::Pika),
+            out: true,
+         };
+         assert_eq!(true, i.alive());
+         assert_eq!(true, i.can_attack());
+         assert_eq!(true, i.can_be_attacked());
+         i.mon.damage = i.mon.species.hp;
+         assert_eq!(false, i.alive());
+         assert_eq!(false, i.can_attack());
+         assert_eq!(false, i.can_be_attacked());
+      }
+   }
+
+   #[derive(Clone, Debug)]
+   struct Idx {
+      pub team: usize,
+      pub mon: usize,
+   }
+
+   #[derive(Clone, Debug)]
+   enum Move {
+      Pass(Idx),
+      Attack(Idx, Idx),
    }
 }