Thralls deteriorate over many bites

src/playerprogress.ts

@@ -1,5 +1,6 @@
 import {ALL_STATS, Skill, Stat, SuccessorOption, Wish} from "./datatypes.ts";
 import {getSkills} from "./skills.ts";
+import {getThralls, LifeStage, Thrall} from "./thralls.ts";
 
 export class PlayerProgress {
   #name: string
@@ -12,6 +13,8 @@ export class PlayerProgress {
   #itemsPurloined: number
   #skillsLearned: number[]  // use the raw ID representation for indexOf
   #untrimmedSkillsAvailable: Skill[]
+  #thrallsUnlocked: number[]
+  #thrallDamage: Record<number, number>
 
   constructor(asSuccessor: SuccessorOption, withWish: Wish | null) {
     this.#name = asSuccessor.name;
@@ -24,6 +27,8 @@ export class PlayerProgress {
     this.#itemsPurloined = 0;
     this.#skillsLearned = []
     this.#untrimmedSkillsAvailable = [];
+    this.#thrallsUnlocked = [];
+    this.#thrallDamage = {};
 
     this.refill();
   }
@@ -52,6 +57,12 @@ export class PlayerProgress {
       }
     }
 
+    for (let thrall of getThralls().getAll()) {
+      let stage = this.getThrallLifeStage(thrall);
+      if (stage == LifeStage.Vampirized || stage == LifeStage.Dead) { continue; }
+      this.#thrallDamage[thrall.id] = Math.max(this.#thrallDamage[thrall.id] ?? 0 - 0.2, 0.0);
+    }
+
     this.#untrimmedSkillsAvailable = learnableSkills
   }
 
@@ -175,7 +186,38 @@ export class PlayerProgress {
   }
 
   getStats() { return {...this.#stats} }
-  getTalents() { return {...this.#talents} } }
+  getTalents() { return {...this.#talents} }
+
+  unlockThrall(thrall: Thrall) {
+    let {id} = thrall;
+    if (this.#thrallsUnlocked.indexOf(id) != -1) { return; }
+    this.#thrallsUnlocked.push(id);
+  }
+
+  isThrallUnlocked(thrall: Thrall) {
+    return this.#thrallsUnlocked.indexOf(thrall.id) != -1;
+  }
+
+  damageThrall(thrall: Thrall, amount: number) {
+    if (amount <= 0.0) {
+      throw new Error(`damage must be some positive amount, not ${amount}`)
+    }
+    let stage = this.getThrallLifeStage(thrall);
+
+    if (stage == LifeStage.Vampirized) { this.#thrallDamage[thrall.id] = 4.0; }
+    this.#thrallDamage[thrall.id] = (this.#thrallDamage[thrall.id] ?? 0.0) + amount
+  }
+
+  getThrallLifeStage(thrall: Thrall): LifeStage {
+    let damage = this.#thrallDamage[thrall.id] ?? 0;
+    console.log(`damage: ${damage}`)
+    if (damage < 0.5) { return LifeStage.Fresh; }
+    if (damage < 1.75) { return LifeStage.Average; }
+    if (damage < 3.0) { return LifeStage.Poor; }
+    if (damage < 4.0) { return LifeStage.Vampirized; }
+    return LifeStage.Dead;
+  }
+}
 
 let active: PlayerProgress | null = null;
 
@@ -185,7 +227,7 @@ export function initPlayerProgress(asSuccessor: SuccessorOption, withWish: Wish
 
 export function getPlayerProgress(): PlayerProgress {
   if (active == null) {
-    throw `trying to get player progress before it has been initialized`
+    throw new Error(`trying to get player progress before it has been initialized`)
   }
   return active
 }