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

namespace Rokojori
{

public class SimulationManager : MonoBehaviour
{
  public static SimulationManager instance => Unique<SimulationManager>.Get();

  public List<GamePhase> intro = new List<GamePhase>();
  public List<GamePhase> preTurn = new List<GamePhase>();
  public List<GamePhase> playerTurn = new List<GamePhase>();
  public List<GamePhase> postTurn = new List<GamePhase>();
  public List<GamePhase> outro = new List<GamePhase>();

  // No Player type exists yet - intro phases are expected to set this
  // (e.g. from a GameStateNumberVariable) before the turn loop starts.
  public int playerCount = 1;

  public bool _gameFinished = false;

  public async Task Run()
  {
    _gameFinished = false;

    await RunPhases( intro );

    while ( ! _gameFinished )
    {
      await RunPhases( preTurn );

      for ( int i = 0; i < playerCount && ! _gameFinished; i++ )
      {
        await RunPhases( playerTurn );
      }

      if ( ! _gameFinished )
      {
        await RunPhases( postTurn );
      }
    }

    await RunPhases( outro );
  }

  public async Task RunPhases( List<GamePhase> phases )
  {
    for ( int i = 0; i < phases.Count; i++ )
    {
      var phase = phases[ i ];

      await phase.Execute( GameStateManager.instance, SimulationRenderer.instance );

      if ( phase.gameFinished )
      {
        _gameFinished = true;
        return;
      }
    }
  }
}

}