pinball-duel/src/ai/personalities/DefensiveAI.ts

import type {
  AIPlayer,
  AIPlayerContext,
} from '../AIPlayer';
import { shouldActivateFlipperBase } from '../AIPlayer';
import type {
  AIDifficulty,
  AIDifficultyParams,
  AIPersonality,
  SetupConfig,
} from '../../types';

// DefensiveAI — «Бэтти-Защитница».
// Стратегия: цепкая защита, бустер только на cradle (не реализовано в Phase 1-2).
// Setup: 2 slingshot в углах ворот, 1 турбо рядом, 1 вираж в дальнем углу, 1 пустой.
// см. ~/Knowledge/Projects/pinball-duel/concepts/bot-ai-design.md#1-defensive-«бэтти-защитница»

export class DefensiveAI implements AIPlayer {
  readonly personality: AIPersonality = 'defensive';
  readonly difficulty: AIDifficulty;
  readonly params: AIDifficultyParams;

  private lastReactionTimeLeft = 0;
  private lastReactionTimeRight = 0;

  constructor(difficulty: AIDifficulty, params: AIDifficultyParams) {
    this.difficulty = difficulty;
    this.params = params;
  }

  update(ctx: AIPlayerContext): void {
    // Defensive — реагирует надёжно на любой приближающийся мяч
    const shouldLeft = shouldActivateFlipperBase(
      ctx,
      'left',
      this.params,
      this.lastReactionTimeLeft,
      this.difficulty,
    );
    if (shouldLeft) {
      if (ctx.leftFlipper.activate()) {
        this.lastReactionTimeLeft = performance.now();
      }
    }
    const shouldRight = shouldActivateFlipperBase(
      ctx,
      'right',
      this.params,
      this.lastReactionTimeRight,
      this.difficulty,
    );
    if (shouldRight) {
      if (ctx.rightFlipper.activate()) {
        this.lastReactionTimeRight = performance.now();
      }
    }
  }

  generateSetup(): SetupConfig {
    // см. bot-ai-design.md#defensive-setup-эвристика
    return {
      slots: [
        { slotId: 'goal_corner_left', bumperType: 'slingshot' },
        { slotId: 'goal_corner_right', bumperType: 'slingshot' },
        { slotId: 'near_goal_center', bumperType: 'turbo' },
        { slotId: 'mid_left', bumperType: 'curve' },
        { slotId: 'mid_right', bumperType: null }, // 1 пустой слот
      ],
    };
  }

  destroy(): void {
    // No state to clean
  }
}