import { flatten } from "../../common/Tools";
import { VigilanceAction } from "../actions/VigilanceAction";
import { BaseBattleDiff } from "../diffs/BaseBattleDiff";
import { VigilanceAppliedDiff } from "../diffs/VigilanceAppliedDiff";
import { Drone } from "../Drone";
import { Ship } from "../Ship";
import { BaseEffect } from "./BaseEffect";

/**
 * Apply vigilance effects on a ship that enters a vigilance area
 */
export class VigilanceEffect extends BaseEffect {
  constructor(private action: VigilanceAction) {
    super("vigilance");
  }

  getOnDiffs(ship: Ship, source: Ship | Drone): BaseBattleDiff[] {
    if (source instanceof Ship) {
      let result = flatten(this.action.intruder_effects.map(effect => effect.getOnDiffs(ship, source)));
      if (result.length > 0) {
        result.unshift(new VigilanceAppliedDiff(source, this.action, ship));
      }
      return result;
    } else {
      return [];
    }
  }

  isInternal(): boolean {
    return true;
  }

  isBeneficial(): boolean {
    return false;
  }

  getDescription(): string {
    return `Vigilance from ${this.action.name}`;
  }
}