using Shogi.Contracts.Api;
using Shogi.UI.Shared;

namespace Shogi.UI.Pages.Play;

public class PromotePrompt
{
  private readonly ShogiApi shogiApi;
  private string? sessionName;
  private MovePieceCommand? command;

  public PromotePrompt(ShogiApi shogiApi)
  {
    this.shogiApi = shogiApi;
		this.IsVisible = false;
		this.OnClickCancel = this.Hide;
  }

  public bool IsVisible { get; private set; }
  public Action OnClickCancel;
  public Func<Task>? OnClickNo;
  public Func<Task>? OnClickYes;

  public void Show(string sessionName, MovePieceCommand command)
  {
    this.sessionName = sessionName;
    this.command = command;
		this.IsVisible = true;
		this.OnClickNo = this.Move;
		this.OnClickYes = this.MoveAndPromote;
  }

  public void Hide()
  {
		this.IsVisible = false;
		this.OnClickNo = null;
		this.OnClickYes = null;
  }

  private Task Move()
  {
    if (this.command != null && this.sessionName != null)
    {
			this.command.IsPromotion = false;
      return this.shogiApi.Move(this.sessionName, this.command);
    }
    return Task.CompletedTask;
  }
  private Task MoveAndPromote()
  {
    if (this.command != null && this.sessionName != null)
    {
			this.command.IsPromotion = true;
      return this.shogiApi.Move(this.sessionName, this.command);
    }
    return Task.CompletedTask;
  }
}