import { useCallback } from 'react';

import type { Character, CustomWorldProfile, GameState } from '../../types';

type UseRpgEntryCharacterSelectParams = {
  gameState: GameState;
  handleBackToWorldSelect: () => void;
  setSelectionStage: (stage: 'platform') => void;
  handleCharacterSelect: (character: NonNullable<GameState['playerCharacter']>) => void;
};

/**
 * 统一角色选择页的返回与确认动作，保持主阶段路由器里只做装配。
 */
export function useRpgEntryCharacterSelect(
  params: UseRpgEntryCharacterSelectParams,
) {
  const {
    gameState,
    handleBackToWorldSelect,
    setSelectionStage,
    handleCharacterSelect,
  } = params;

  const customWorldProfile: CustomWorldProfile | null =
    gameState.customWorldProfile;

  const handleBack = useCallback(() => {
    handleBackToWorldSelect();
    setSelectionStage('platform');
  }, [handleBackToWorldSelect, setSelectionStage]);

  const handleConfirm = useCallback(
    (character: Character) => {
      handleCharacterSelect(character);
    },
    [handleCharacterSelect],
  );

  return {
    worldType: gameState.worldType,
    customWorldProfile,
    handleBack,
    handleConfirm,
  };
}