import 'package:rules_of_living/src/Rule.dart';

class Cell {
  bool state;
  bool nextState = false;
  List<Rule> surviveRules = new List<Rule>();
  List<Rule> birthRules = new List<Rule>();

  /// For determining if render updates are necessary in [Grid].render() function
  bool dirty = false;

  Cell([bool state = false]) : this.state = state;

  // Sets the actual state to what it should be next update
  // Returns the newly assumed actual state of the cell.
  bool advanceState() {
    this.state = this.nextState;
    this.nextState = false;

    this.dirty = true;

    return this.state;
  }

  void update(int neighbors) {
    if (state == true) {
      surviveRules.forEach((Rule rule) {
        if (rule.evaluate(neighbors) == true) this.nextState = true;
      });
    } else {
      birthRules.forEach((Rule rule) {
        if (rule.evaluate(neighbors) == true) this.nextState = true;
      });
    }
  }
}