/**
 * MovingState - Navigate the turtle to a target position using D* Lite
 */
import { BaseState } from './BaseState.js';

export class MovingState extends BaseState {
  constructor(turtle, data = {}) {
    super(turtle, data);
    this.target = data.target; // {x, y, z}
    this.onArrival = data.onArrival || null; // Callback/next state when arrived
    this.canMine = data.canMine !== false;
  }

  get name() {
    return 'moving';
  }

  get description() {
    const pos = this.target;
    if (pos) {
      return `Moving to (${pos.x}, ${pos.y}, ${pos.z})`;
    }
    return 'Moving to target';
  }

  async *act() {
    if (!this.target) {
      console.log(`[${this.turtle.id}] MovingState: No target set`);
      this.turtle.setState('idle');
      return;
    }

    console.log(`[${this.turtle.id}] Moving to ${this.target.x},${this.target.y},${this.target.z}`);

    // Use the navigateTo generator from BaseState
    const nav = this.navigateTo(this.target, { canMine: this.canMine });
    
    for await (const _ of nav) {
      if (this.cancelled) return;
      yield;
    }

    // Check if we actually arrived
    const pos = this.turtle.position;
    if (pos) {
      const { Point } = await import('../pathfinding/index.js');
      const current = Point.from(pos);
      const goal = Point.from(this.target);
      
      if (current.distanceTo(goal) <= 1) {
        console.log(`[${this.turtle.id}] Arrived at destination`);
        
        if (this.onArrival === 'idle') {
          this.turtle.setState('idle');
        } else if (this.onArrival === 'mine') {
          this.turtle.setState('mining', this.data);
        } else {
          this.turtle.setState('idle');
        }
        return;
      }
    }

    console.log(`[${this.turtle.id}] Failed to reach destination`);
    this.turtle.setState('idle');
  }

  getRecoveryData() {
    return {
      ...super.getRecoveryData(),
      data: {
        target: this.target,
        onArrival: this.onArrival,
        canMine: this.canMine,
      },
    };
  }
}