Android build v1.1.2

src/combat/encounters.ts

@@ -0,0 +1,71 @@
+import type { DungeonEncounter } from '../profile'
+import { chooseRandom } from './rules'
+
+export function encounterThreat(encounter: DungeonEncounter) {
+  return (
+    encounter.maxHealth
+    + encounter.damage * 18
+    + encounter.tankDamage * 10
+    + encounter.partyDamage * 18
+  )
+}
+
+export function buildRoguelikeSegment<TMechanic extends string, TExtra extends object = object>({
+  pool,
+  stage,
+  mechanics,
+  trashCandidateCount,
+  bossCandidateCount,
+  healthScale,
+  damageScale,
+  partyDamageScale,
+  idBase,
+  bossDescription,
+  bossName,
+  fallbackBossFirst = false,
+  extraFields,
+}: {
+  pool: DungeonEncounter[]
+  stage: number
+  mechanics: TMechanic[]
+  trashCandidateCount: (trashCount: number) => number
+  bossCandidateCount: (bossCount: number) => number
+  healthScale: number
+  damageScale: number
+  partyDamageScale: number
+  idBase: number
+  bossDescription: (mechanics: TMechanic[]) => string
+  bossName?: (encounter: DungeonEncounter) => string
+  fallbackBossFirst?: boolean
+  extraFields?: (encounter: DungeonEncounter, isBoss: boolean, mechanics: TMechanic[]) => TExtra
+}) {
+  const trashPool = [...pool.filter((encounter) => !encounter.isBoss)]
+    .sort((left, right) => encounterThreat(left) - encounterThreat(right))
+  const bossPool = [...pool.filter((encounter) => encounter.isBoss)]
+    .sort((left, right) => encounterThreat(left) - encounterThreat(right))
+  const selectedTrash = chooseRandom(trashPool.slice(0, trashCandidateCount(trashPool.length)), 2)
+  const selectedBoss = chooseRandom(bossPool.slice(0, bossCandidateCount(bossPool.length)), 1)[0]
+    ?? (fallbackBossFirst ? bossPool[0] : trashPool[0])
+    ?? trashPool[0]
+    ?? pool[0]
+  const selectedMechanics = mechanics
+
+  return [...selectedTrash, selectedBoss].map((encounter, index) => {
+    const isBoss = index === 2
+    return {
+      ...encounter,
+      id: idBase + stage * 10 + index,
+      sequence: (stage - 1) * 3 + index + 1,
+      isBoss,
+      encounterType: isBoss ? 'boss' : 'trash',
+      enemyName: isBoss ? (bossName?.(encounter) ?? `${encounter.enemyName} ${stage}`) : encounter.enemyName,
+      description: isBoss ? bossDescription(selectedMechanics) : encounter.description,
+      maxHealth: Math.round(encounter.maxHealth * healthScale),
+      damage: Math.round(encounter.damage * damageScale),
+      tankDamage: Math.round(encounter.tankDamage * damageScale),
+      partyDamage: Math.round(encounter.partyDamage * partyDamageScale),
+      lootTables: [],
+      ...(extraFields?.(encounter, isBoss, selectedMechanics) ?? {} as TExtra),
+    }
+  })
+}