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* useCombatState Hook - Consolidated Combat State Management
*
* Custom hook for managing complex combat state using useReducer.
* Consolidates multiple useState calls into a single reducer for better
* performance and maintainability.
*
* Performance:
* - Uses useReducer to batch state updates
* - Reduces number of re-renders
* - Provides clear action-based state updates
*
* @returns Combat state and dispatch actions
*
* @example
* ```typescript
* const { state, actions } = useCombatState();
* actions.setHitEffects([effect1, effect2]);
* actions.incrementCombo();
* ```
*/
import { HitEffect } from "@/systems";
import type { StanceLaterality } from "@/systems/trigram/types";
import { useCallback, useReducer } from "react";
/**
* Combat screen state managed by the reducer
* Note: Renamed from CombatState to avoid conflict with CombatState enum in types/common.ts
*/
export interface CombatScreenState {
readonly hitEffects: HitEffect[];
readonly isExecutingTechnique: boolean;
readonly combatMessages: string[];
readonly roundStarted: boolean;
readonly roundEnded: boolean;
readonly roundDisplayStatus: "start" | "fight" | "ko" | "end" | null;
readonly comboCount: number;
readonly lastHitTime: number;
readonly screenShake: { x: number; y: number };
readonly playerLaterality: readonly [StanceLaterality, StanceLaterality];
}
/**
* Combat state actions
*/
type CombatAction =
| { type: "SET_HIT_EFFECTS"; payload: HitEffect[] }
| { type: "ADD_HIT_EFFECT"; payload: HitEffect }
| { type: "REMOVE_HIT_EFFECT"; payload: string }
| { type: "SET_EXECUTING_TECHNIQUE"; payload: boolean }
| { type: "ADD_COMBAT_MESSAGE"; payload: string }
| { type: "SET_ROUND_STARTED"; payload: boolean }
| { type: "SET_ROUND_ENDED"; payload: boolean }
| { type: "SET_ROUND_DISPLAY_STATUS"; payload: "start" | "fight" | "ko" | "end" | null }
| { type: "SET_COMBO_COUNT"; payload: number }
| { type: "INCREMENT_COMBO" }
| { type: "RESET_COMBO" }
| { type: "SET_LAST_HIT_TIME"; payload: number }
| { type: "SET_SCREEN_SHAKE"; payload: { x: number; y: number } }
| { type: "RESET_SCREEN_SHAKE" }
| { type: "RESET_ROUND_STATE" }
| { type: "SET_PLAYER_LATERALITY"; payload: readonly [StanceLaterality, StanceLaterality] }
| { type: "SET_PLAYER_LATERALITY_INDEX"; payload: { index: 0 | 1; laterality: StanceLaterality } };
/**
* Initial combat state
*/
const initialState: CombatScreenState = {
hitEffects: [],
isExecutingTechnique: false,
combatMessages: [],
roundStarted: false,
roundEnded: false,
roundDisplayStatus: null,
comboCount: 0,
lastHitTime: 0,
screenShake: { x: 0, y: 0 },
playerLaterality: ["right", "right"],
};
/**
* Combat state reducer
* Handles all combat state updates in a centralized, performant way
*/
function combatReducer(state: CombatScreenState, action: CombatAction): CombatScreenState {
switch (action.type) {
case "SET_HIT_EFFECTS":
return { ...state, hitEffects: action.payload };
case "ADD_HIT_EFFECT":
return { ...state, hitEffects: [...state.hitEffects, action.payload] };
case "REMOVE_HIT_EFFECT":
return {
...state,
hitEffects: state.hitEffects.filter((effect) => effect.id !== action.payload),
};
case "SET_EXECUTING_TECHNIQUE":
return { ...state, isExecutingTechnique: action.payload };
case "ADD_COMBAT_MESSAGE":
return {
...state,
combatMessages: [action.payload, ...state.combatMessages.slice(0, 4)],
};
case "SET_ROUND_STARTED":
return { ...state, roundStarted: action.payload };
case "SET_ROUND_ENDED":
return { ...state, roundEnded: action.payload };
case "SET_ROUND_DISPLAY_STATUS":
return { ...state, roundDisplayStatus: action.payload };
case "SET_COMBO_COUNT":
return { ...state, comboCount: action.payload };
case "INCREMENT_COMBO":
return { ...state, comboCount: state.comboCount + 1 };
case "RESET_COMBO":
return { ...state, comboCount: 0 };
case "SET_LAST_HIT_TIME":
return { ...state, lastHitTime: action.payload };
case "SET_SCREEN_SHAKE":
return { ...state, screenShake: action.payload };
case "RESET_SCREEN_SHAKE":
return { ...state, screenShake: { x: 0, y: 0 } };
case "RESET_ROUND_STATE":
return {
...state,
roundStarted: false,
roundEnded: false,
roundDisplayStatus: null,
comboCount: 0,
hitEffects: [],
combatMessages: [],
};
case "SET_PLAYER_LATERALITY":
return { ...state, playerLaterality: action.payload };
case "SET_PLAYER_LATERALITY_INDEX":
const newLaterality: [StanceLaterality, StanceLaterality] = [...state.playerLaterality] as [StanceLaterality, StanceLaterality];
newLaterality[action.payload.index] = action.payload.laterality;
return { ...state, playerLaterality: newLaterality };
default:
return state;
}
}
/**
* Combat state action creators
*/
export interface CombatActions {
readonly setHitEffects: (effects: HitEffect[]) => void;
readonly addHitEffect: (effect: HitEffect) => void;
readonly removeHitEffect: (effectId: string) => void;
readonly setExecutingTechnique: (executing: boolean) => void;
readonly addCombatMessage: (message: string) => void;
readonly setRoundStarted: (started: boolean) => void;
readonly setRoundEnded: (ended: boolean) => void;
readonly setRoundDisplayStatus: (status: "start" | "fight" | "ko" | "end" | null) => void;
readonly setComboCount: (count: number) => void;
readonly incrementCombo: () => void;
readonly resetCombo: () => void;
readonly setLastHitTime: (time: number) => void;
readonly setScreenShake: (shake: { x: number; y: number }) => void;
readonly resetScreenShake: () => void;
readonly resetRoundState: () => void;
readonly setPlayerLaterality: (laterality: readonly [StanceLaterality, StanceLaterality]) => void;
readonly setPlayerLateralityIndex: (index: 0 | 1, laterality: StanceLaterality) => void;
}
/**
* Custom hook for combat state management
*/
export function useCombatState() {
const [state, dispatch] = useReducer(combatReducer, initialState);
// Memoized action creators to prevent recreation on every render
const actions: CombatActions = {
setHitEffects: useCallback(
(effects: HitEffect[]) => dispatch({ type: "SET_HIT_EFFECTS", payload: effects }),
[]
),
addHitEffect: useCallback(
(effect: HitEffect) => dispatch({ type: "ADD_HIT_EFFECT", payload: effect }),
[]
),
removeHitEffect: useCallback(
(effectId: string) => dispatch({ type: "REMOVE_HIT_EFFECT", payload: effectId }),
[]
),
setExecutingTechnique: useCallback(
(executing: boolean) =>
dispatch({ type: "SET_EXECUTING_TECHNIQUE", payload: executing }),
[]
),
addCombatMessage: useCallback(
(message: string) => dispatch({ type: "ADD_COMBAT_MESSAGE", payload: message }),
[]
),
setRoundStarted: useCallback(
(started: boolean) => dispatch({ type: "SET_ROUND_STARTED", payload: started }),
[]
),
setRoundEnded: useCallback(
(ended: boolean) => dispatch({ type: "SET_ROUND_ENDED", payload: ended }),
[]
),
setRoundDisplayStatus: useCallback(
(status: "start" | "fight" | "ko" | "end" | null) =>
dispatch({ type: "SET_ROUND_DISPLAY_STATUS", payload: status }),
[]
),
setComboCount: useCallback(
(count: number) => dispatch({ type: "SET_COMBO_COUNT", payload: count }),
[]
),
incrementCombo: useCallback(() => dispatch({ type: "INCREMENT_COMBO" }), []),
resetCombo: useCallback(() => dispatch({ type: "RESET_COMBO" }), []),
setLastHitTime: useCallback(
(time: number) => dispatch({ type: "SET_LAST_HIT_TIME", payload: time }),
[]
),
setScreenShake: useCallback(
(shake: { x: number; y: number }) =>
dispatch({ type: "SET_SCREEN_SHAKE", payload: shake }),
[]
),
resetScreenShake: useCallback(() => dispatch({ type: "RESET_SCREEN_SHAKE" }), []),
resetRoundState: useCallback(() => dispatch({ type: "RESET_ROUND_STATE" }), []),
setPlayerLaterality: useCallback(
(laterality: readonly [StanceLaterality, StanceLaterality]) =>
dispatch({ type: "SET_PLAYER_LATERALITY", payload: laterality }),
[]
),
setPlayerLateralityIndex: useCallback(
(index: 0 | 1, laterality: StanceLaterality) =>
dispatch({ type: "SET_PLAYER_LATERALITY_INDEX", payload: { index, laterality } }),
[]
),
};
return { state, actions };
}
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