AOC2020/aoc2020/lib/aoc20201214.dart

import 'package:any_base/any_base.dart';
import 'package:aoc2020/aocbase.dart';
import 'package:aoc2020/model/readdata.dart';
import 'package:tuple/tuple.dart';

class AOC20201214 extends AOCBase {
  var mylist = <String>[];
  var rawMask = '';
  Tuple2<int, int> mask;
  var mem = <int, int>{};

  static const max = 274877906943;
  static const dec2bin = AnyBase(AnyBase.dec, AnyBase.bin);
  static const bin2dec = AnyBase(AnyBase.bin, AnyBase.dec);

  void init(bool test) async {
    mylist = await ReadData.readFile<String>(classString, test: test);
  }

  void setMem(int address, int val) => mem[address] = applyMask(val);
  int applyMask(int val) => (val | mask.item1) & mask.item2;
  void setMask(String _rawMask) {
    rawMask = _rawMask;
    var _orMask = int.parse(bin2dec.convert(_rawMask.replaceAll('X', '0')));
    var _andMask = int.parse(bin2dec.convert(_rawMask.replaceAll('X', '1')));
    mask = Tuple2(_orMask, _andMask);
  }

  void setMaskSection2(String _rawMask) {
// find all 'X's
// find position of all X's
// binarily cycle through all binary numbers posible make a list of masks
  }

  int applyMaskSection2(int val) => (val | mask.item1) & mask.item2;

  void setMemSection2(int address, int val) {
    mem[address] = applyMask(val);
  }

  @override
  Future<void> a({bool test}) async {

    await init(test);
    mem.clear();

    for (var line in mylist) {
      var split1 = line.split(' = ');
      var cmd = split1[0];
      var val = split1[1];
      if (cmd == 'mask') {
        setMask(val);
      } else {
        var address = int.parse(cmd.split('[')[1].split(']')[0]);
        var value = int.parse(val);
        setMem(address, value);
      }
    }
    answerA = mem.values.reduce((a,b) => a + b);
  }

  @override
  Future<void> b({bool test}) async {
    await init(test);
  }
}