{
  Solutions to the Advent Of Code.
  Copyright (C) 2023  Stefan Müller

  This program is free software: you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation, either version 3 of the License, or (at your option) any later
  version.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with
  this program.  If not, see <http://www.gnu.org/licenses/>.
}

program AdventOfCode;

{$mode objfpc}{$H+}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  Classes, SysUtils, CustApp, Generics.Collections, USolver,
  UTrebuchet, UCubeConundrum, UGearRatios, UScratchcards, UGiveSeedFertilizer, UWaitForIt, UCamelCards,
  UHauntedWasteland, UNumberTheory, UMirageMaintenance, UPipeMaze, UCosmicExpansion, UHotSprings, UPointOfIncidence,
  UParabolicReflectorDish, ULensLibrary, UFloorWillBeLava, UClumsyCrucible, ULavaductLagoon, UAplenty,
  UPulsePropagation, UStepCounter, USandSlabs, ULongWalk, UNeverTellMeTheOdds;

type

  { TAdventOfCode }

  TAdventOfCode = class(TCustomApplication)
  private
    procedure RunPuzzleSolutions;
  protected
    procedure DoRun; override;
  public
    constructor Create(TheOwner: TComponent); override;
    destructor Destroy; override;
    procedure WriteHelp; virtual;
  end;

{ TAdventOfCode }

procedure TAdventOfCode.RunPuzzleSolutions;
var
  engine: TSolverEngine;
  solvers: specialize TList<Integer>;
  p: string;
  n: Integer;
begin
  WriteLn('### Advent of Code 2023 ###');
  engine := TSolverEngine.Create(TStringArray.Create(
    'data',
    ConcatPaths(['..', '..', 'data'])
  ));

  solvers := specialize TList<Integer>.Create;
  if HasOption('p', 'puzzle') then
  begin
    for p in GetOptionValues('p', 'puzzle') do
      if TryStrToInt(p, n) then
        solvers.Add(n);
  end
  else
    for n := 1 to 25 do
      solvers.Add(n);

  for n in solvers do
    case n of
      1: engine.RunAndFree(TTrebuchet.Create);
      2: engine.RunAndFree(TCubeConundrum.Create);
      3: engine.RunAndFree(TGearRatios.Create);
      4: engine.RunAndFree(TScratchcards.Create);
      5: engine.RunAndFree(TGiveSeedFertilizer.Create);
      6: engine.RunAndFree(TWaitForIt.Create);
      7: engine.RunAndFree(TCamelCards.Create);
      8: engine.RunAndFree(THauntedWasteland.Create);
      9: engine.RunAndFree(TMirageMaintenance.Create);
      10: engine.RunAndFree(TPipeMaze.Create);
      11: engine.RunAndFree(TCosmicExpansion.Create);
      12: engine.RunAndFree(THotSprings.Create);
      13: engine.RunAndFree(TPointOfIncidence.Create);
      14: engine.RunAndFree(TParabolicReflectorDish.Create);
      15: engine.RunAndFree(TLensLibrary.Create);
      16: engine.RunAndFree(TFloorWillBeLava.Create);
      17: engine.RunAndFree(TClumsyCrucible.Create);
      18: engine.RunAndFree(TLavaductLagoon.Create);
      19: engine.RunAndFree(TAplenty.Create);
      20: engine.RunAndFree(TPulsePropagation.Create);
      21: engine.RunAndFree(TStepCounter.Create);
      22: engine.RunAndFree(TSandSlabs.Create);
      23: engine.RunAndFree(TLongWalk.Create);
      24: engine.RunAndFree(TNeverTellMeTheOdds.Create);
    end;

  engine.Free;
  solvers.Free;
  WriteLn;
end;

procedure TAdventOfCode.DoRun;
var
  ErrorMsg: String;
begin
  // quick check parameters
  ErrorMsg := CheckOptions('hp:', ['help', 'puzzle:']);
  if ErrorMsg <> '' then
  begin
    ShowException(Exception.Create(ErrorMsg));
    Terminate;
    Exit;
  end;

  // parse parameters
  if HasOption('h', 'help') then
  begin
    WriteHelp;
    Terminate;
    Exit;
  end;

  RunPuzzleSolutions;

  // stop program loop
  Terminate;
end;

constructor TAdventOfCode.Create(TheOwner: TComponent);
begin
  inherited Create(TheOwner);
  StopOnException := True;
end;

destructor TAdventOfCode.Destroy;
begin
  inherited Destroy;
end;

procedure TAdventOfCode.WriteHelp;
begin
  WriteLn('Usage: ', ExeName, ' [Options]');
  WriteLn('Options:');
  WriteLn('  --help, -h');
  WriteLn('      Shows this usage help.');
  WriteLn('  --puzzle=<n>, -p <n>');
  WriteLn('      Instead of running all solvers, only run the one for day <n>.');
  WriteLn('      Integer from 1 to 25. Can be specified multiple times.');
end;

var
  Application: TAdventOfCode;
begin
  Application := TAdventOfCode.Create(nil);
  Application.Title := 'Advent of Code 2023';
  Application.Run;
  Application.Free;
end.