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PlayerArchetype,
TrigramStance,
VitalPointSeverity,
} from "../../types/common";
import { PlayerState } from "../player";
import { TrigramCalculator } from "../trigram/TrigramCalculator";
import { StatusEffect } from "../types";
import { calculateMeridianFlow } from "./KoreanAnatomy";
import { getMeridiansForVitalPoint } from "./MeridianVitalPointMapping";
import {
DamageResult,
KoreanTechnique,
VitalPoint,
VitalPointHitResult,
} from "./types";
export class DamageCalculator {
/**
* Vital point severity damage multipliers
*/
private static readonly SEVERITY_MULTIPLIERS: Record<
VitalPointSeverity,
number
> = {
[VitalPointSeverity.MINOR]: 1.2,
[VitalPointSeverity.MODERATE]: 1.5,
[VitalPointSeverity.MAJOR]: 2.0,
[VitalPointSeverity.CRITICAL]: 2.5,
[VitalPointSeverity.LETHAL]: 3.0,
};
/**
* Accuracy bonus scaling constants
* Maps 0.0-1.0 accuracy to 0.8x-1.2x multiplier
*/
private static readonly ACCURACY_MIN_MULTIPLIER = 0.8;
private static readonly ACCURACY_RANGE = 0.4; // Range from min to max (1.2 - 0.8)
/**
* Calculate vital point damage with proper archetype bonuses
*/
static calculateVitalPointDamage(
vitalPoint: VitalPoint,
baseDamage: number,
attacker: PlayerState,
accuracy: number
): DamageResult {
const effects: StatusEffect[] = [];
// Fix: Use static method call instead of this
const archetypeModifier = DamageCalculator.getArchetypeModifier(
attacker.archetype
);
const techniqueEffectiveness = accuracy;
const finalDamage = Math.max(
1,
(vitalPoint.baseDamage ?? vitalPoint.damage?.min ?? baseDamage) *
archetypeModifier *
techniqueEffectiveness
);
// Create status effects from vital point
vitalPoint.effects.forEach((effect) => {
const statusEffect: StatusEffect = {
id: `${effect.id}_${Date.now()}`,
type: "weakened", // Map to valid EffectType
intensity: "moderate" as any,
duration: effect.duration,
description: effect.description,
stackable: effect.stackable,
source: vitalPoint.id,
startTime: Date.now(),
endTime: Date.now() + effect.duration,
};
effects.push(statusEffect);
});
return {
damage: finalDamage,
effects,
isCritical: accuracy > 0.9,
isVitalPoint: true,
};
}
/**
* Fix: Add missing getArchetypeModifier method
*/
static getArchetypeModifier(archetype: PlayerArchetype): number {
switch (archetype) {
case PlayerArchetype.MUSA:
return 1.2; // Traditional warrior - strong base damage
case PlayerArchetype.AMSALJA:
return 1.5; // Assassin - high damage modifier
case PlayerArchetype.HACKER:
return 1.1; // Cyber warrior - precision over power
case PlayerArchetype.JEONGBO_YOWON:
return 1.1; // Intelligence operative - strategic damage
case PlayerArchetype.JOJIK_POKRYEOKBAE:
return 1.3; // Organized crime - brutal effectiveness
default:
return 1.0;
}
}
/**
* Calculate technique damage with vital point consideration
*/
static calculateTechniqueDamage(
technique: KoreanTechnique,
attacker: PlayerState,
vitalPoint: VitalPoint | null,
accuracy: number
): DamageResult {
// Fix: Remove unused baseDamage variable and use technique.damage directly
const effects: StatusEffect[] = [];
const archetypeModifier = DamageCalculator.getArchetypeModifier(
attacker.archetype
);
let finalDamage = (technique.damage ?? 15) * archetypeModifier * accuracy;
// Apply vital point multiplier if hitting a vital point
if (vitalPoint) {
finalDamage *=
(vitalPoint.baseDamage ?? vitalPoint.damage?.min ?? 10) / 10;
// Add vital point effects
vitalPoint.effects.forEach((effect) => {
const statusEffect: StatusEffect = {
id: `${effect.id}_${Date.now()}`,
type: "weakened",
intensity: "moderate" as any,
duration: effect.duration,
description: effect.description,
stackable: effect.stackable,
source: vitalPoint.id,
startTime: Date.now(),
endTime: Date.now() + effect.duration,
};
effects.push(statusEffect);
});
}
return {
damage: Math.max(1, Math.floor(finalDamage)),
effects,
isCritical: accuracy > 0.8,
isVitalPoint: !!vitalPoint,
};
}
/**
* Calculate damage reduction from defense
*/
static calculateDamageReduction(
incomingDamage: number,
defenderDefense: number,
isBlocking: boolean = false
): number {
const blockMultiplier = isBlocking ? 0.5 : 1.0;
const defenseReduction = Math.min(0.8, defenderDefense / 200); // Max 80% reduction
return Math.max(
1,
incomingDamage * (1 - defenseReduction) * blockMultiplier
);
}
/**
* Calculate critical hit chance
*/
static calculateCriticalChance(
baseCritChance: number,
attacker: PlayerState,
technique: KoreanTechnique
): number {
const archetypeBonus =
DamageCalculator.getArchetypeModifier(attacker.archetype) * 0.1;
const techniqueBonus = (technique.critChance || 0.1) * 0.5;
return Math.min(0.95, baseCritChance + archetypeBonus + techniqueBonus);
}
/**
* Calculate comprehensive vital point damage with all modifiers.
*
* **Korean**: 종합 급소 피해 계산 (Comprehensive Vital Point Damage Calculation)
*
* Integrates all damage modifiers including:
* - Base damage from attacker strength and technique power
* - Stance effectiveness (攻克关系)
* - Vital point severity multipliers (1.5x-3.0x)
* - Accuracy bonus (0.8x-1.2x)
* - Meridian flow bonus (1.0x-1.3x at peak hours)
* - Time-of-day bonus (+20% for Dark Ops techniques at night)
* - Archetype-specific bonuses
* - Critical hit multiplier (2x when accuracy > 0.9)
* - Damage variance (±10% randomness)
* - Defense reduction
*
* ## Damage Formula
*
* ```typescript
* finalDamage =
* baseDamage ×
* stanceEffectiveness ×
* vitalPointMultiplier ×
* accuracyBonus ×
* meridianBonus ×
* timeBonus ×
* archetypeBonus ×
* criticalMultiplier ×
* variance ×
* defenseReduction
* ```
*
* @param attacker - Attacking player state
* @param defender - Defending player state
* @param technique - Korean martial arts technique being used
* @param vitalPointHit - Result of vital point hit detection
* @param currentHour - Current hour of day (0-23) for meridian flow
* @param meridianStates - Current meridian disruption states (0=blocked, 1=normal)
* @returns Comprehensive damage result with all modifiers applied
*
* @example
* ```typescript
* const result = DamageCalculator.calculateEnhancedVitalPointDamage(
* attackerState,
* defenderState,
* technique,
* vitalPointHitResult,
* 2, // 2 AM - liver meridian peak
* { liver: 1.0, gallbladder: 0.8 }
* );
* console.log(`Final damage: ${result.damage}`);
* console.log(`Critical hit: ${result.isCritical}`);
* ```
*
* @public
* @korean 종합급소피해계산
*/
static calculateEnhancedVitalPointDamage(
attacker: PlayerState,
defender: PlayerState,
technique: KoreanTechnique,
vitalPointHit: VitalPointHitResult,
currentHour: number,
meridianStates: Record<string, number>
): DamageResult {
// 1. Base damage from technique
const attackerStrength = attacker.attackPower || 50;
const techniquePower = technique.damage || 15;
const baseDamage = attackerStrength * (techniquePower / 10);
// 2. Stance effectiveness (攻克关系)
const stanceEffectiveness = TrigramCalculator.calculateStanceEffectiveness(
attacker.currentStance,
defender.currentStance
);
// 3. Vital point severity multiplier
const vitalPointMultiplier = vitalPointHit.vitalPointHit
? DamageCalculator.SEVERITY_MULTIPLIERS[vitalPointHit.severity] ?? 1
: 1;
// 4. Accuracy bonus (better aim = more damage)
// Maps 0.0-1.0 accuracy to 0.8x-1.2x multiplier
const accuracy = vitalPointHit.accuracy ?? 0.5;
const accuracyBonus =
DamageCalculator.ACCURACY_MIN_MULTIPLIER +
accuracy * DamageCalculator.ACCURACY_RANGE;
// 5. Meridian flow bonus
const meridianBonus = DamageCalculator.calculateMeridianDamageBonus(
vitalPointHit.vitalPointHit?.id ?? "",
currentHour,
meridianStates
);
// 6. Time-of-day bonus (Dark Ops techniques at night)
const timeBonus = DamageCalculator.calculateTimeBonus(
technique,
currentHour
);
// 7. Archetype-specific bonus
const archetypeBonus = DamageCalculator.getArchetypeDamageBonus(
attacker.archetype,
technique,
vitalPointHit.vitalPointHit
);
// 8. Critical hit (accuracy > 0.9)
const criticalMultiplier = accuracy > 0.9 ? 2.0 : 1.0;
const isCritical = accuracy > 0.9;
// 9. Calculate total damage before defense
let totalDamage =
baseDamage *
stanceEffectiveness *
vitalPointMultiplier *
accuracyBonus *
meridianBonus *
timeBonus *
archetypeBonus *
criticalMultiplier;
// 10. Add damage variance (±10%)
const variance = 0.9 + Math.random() * 0.2; // 0.9 to 1.1
totalDamage *= variance;
// 11. Apply defense reduction using existing method for consistency
const defenderDefense = defender.defense || 0;
const finalDamage = DamageCalculator.calculateDamageReduction(
totalDamage,
defenderDefense,
false
);
// 12. Combine effects from vital point hit
const effects = vitalPointHit.effects || [];
return {
damage: Math.max(1, finalDamage), // Minimum 1 damage
effects,
isCritical,
isVitalPoint: !!vitalPointHit.vitalPointHit,
};
}
/**
* Calculate meridian flow damage bonus based on time of day.
*
* **Korean**: 경락 유효성 피해 보너스 계산
*
* Calculates bonus damage when striking vital points during their peak
* meridian flow hours. Peak flow provides +30% damage bonus.
*
* @param vitalPointId - ID of the vital point being struck
* @param currentHour - Current hour of day (0-23)
* @param meridianStates - Current meridian disruption states
* @returns Damage multiplier (1.0-1.3)
*
* @private
* @korean 경락유효성피해보너스계산
*/
private static calculateMeridianDamageBonus(
vitalPointId: string,
currentHour: number,
meridianStates: Record<string, number>
): number {
if (!vitalPointId) return 1;
const relatedMeridians = getMeridiansForVitalPoint(vitalPointId);
let maxBonus = 1.0;
for (const meridianId of relatedMeridians) {
const flow = calculateMeridianFlow(meridianId, currentHour);
const state = meridianStates[meridianId] ?? 1.0;
// Peak flow (>0.9) with normal state gives +30% bonus
// flow ranges from 0.7 to 1.3, state from 0 (blocked) to 1 (normal)
const effectiveFlow = flow * state;
if (effectiveFlow > 0.9) {
// Bonus scales linearly from 1.0 (no bonus) at effectiveFlow = 0.9
// to 1.3 (maximum 30% bonus) at effectiveFlow = 1.3:
// bonus = 1.0 + ((effectiveFlow - 0.9) / 0.4) * 0.3
const bonus = 1.0 + ((effectiveFlow - 0.9) / 0.4) * 0.3;
maxBonus = Math.max(maxBonus, Math.min(1.3, bonus));
}
}
return maxBonus;
}
/**
* Calculate time-of-day bonus for Dark Ops techniques.
*
* **Korean**: 시간대 보너스 계산
*
* Dark Ops techniques gain +20% damage at night (20:00-05:59)
* to reflect tactical advantage of darkness.
*
* @param technique - Technique being used
* @param currentHour - Current hour of day (0-23)
* @returns Time bonus multiplier (1.0 or 1.2)
*
* @private
* @korean 시간대보너스계산
*/
private static calculateTimeBonus(
technique: KoreanTechnique,
currentHour: number
): number {
// Dark Ops techniques get +20% at night (20:00-05:59)
// Check if technique has dark_ops or stealth in its ID or type
const isDarkOpsTechnique =
technique.id.includes("dark_ops") ||
technique.id.includes("stealth") ||
technique.id.includes("shadow") ||
technique.id.includes("night");
if (isDarkOpsTechnique) {
// Night hours: 20:00 through 05:59 (6 AM is considered daylight)
if (currentHour >= 20 || currentHour < 6) {
return 1.2;
}
}
return 1.0;
}
/**
* Get archetype-specific damage bonus for technique and vital point.
*
* **Korean**: 원형 특화 피해 보너스
*
* Each archetype has specialized bonuses for different techniques
* and vital point categories:
*
* - **무사 (Musa)**: +20% with 건 (Geon) stance techniques
* - **암살자 (Amsalja)**: +30% on neurological vital points
* - **해커 (Hacker)**: +15% baseline precision bonus
* - **정보요원 (Jeongbo)**: +25% on vascular vital points
* - **조직폭력배 (Jojik)**: +20% on dirty/ruthless techniques
*
* @param archetype - Attacker's archetype
* @param technique - Technique being used
* @param vitalPoint - Vital point being struck (optional)
* @returns Archetype damage multiplier (1.0-1.5)
*
* @private
* @korean 원형특화피해보너스
*/
private static getArchetypeDamageBonus(
archetype: PlayerArchetype,
technique: KoreanTechnique,
vitalPoint?: VitalPoint
): number {
// Base archetype modifier
let bonus = DamageCalculator.getArchetypeModifier(archetype);
// Additional bonuses based on technique-archetype synergy
switch (archetype) {
case PlayerArchetype.MUSA:
// Musa gets bonus with Geon (Heaven) stance techniques
Eif (technique.stance === TrigramStance.GEON) {
bonus *= 1.2;
}
break;
case PlayerArchetype.AMSALJA:
// Assassin gets bonus on neurological vital points
if (vitalPoint?.category === "neurological") {
bonus *= 1.3;
}
break;
case PlayerArchetype.HACKER:
// Hacker gets consistent precision bonus
bonus *= 1.15;
break;
case PlayerArchetype.JEONGBO_YOWON:
// Intelligence operative gets bonus on vascular targets
if (vitalPoint?.category === "vascular") {
bonus *= 1.25;
}
break;
case PlayerArchetype.JOJIK_POKRYEOKBAE:
// Organized crime gets bonus on ruthless techniques
// Check for keywords in technique ID
if (
technique.id.includes("ruthless") ||
technique.id.includes("brutal") ||
technique.id.includes("dirty")
) {
bonus *= 1.2;
}
break;
}
// Cap maximum bonus at 1.5x
return Math.min(1.5, bonus);
}
}
export default DamageCalculator;
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