using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace Rokojori
{

// Drives a dialog without any UI - auto-answers PlayerChoice blocks and logs
// the path taken, so DialogProcessor can be exercised in isolation.
public class HeadlessDialogDisplay : IDialogDisplay
{
  public List<DialogBlock> visitedBlocks = new List<DialogBlock>();

  public Func<PlayerChoice, int> chooseOption = choice => 0;

  public Task<DialogAnswer> Show( DialogBlock block )
  {
    visitedBlocks.Add( block );

    var answer = new DialogAnswer();

    if ( block is PlayerChoice choice )
    {
      answer.selectedOptionIndex = chooseOption( choice );
    }

    return Task.FromResult( answer );
  }
}

}