using System.Collections.Generic;

namespace Rokojori;

public abstract class Parser
{
  public string source;
  public List<LexerEvent> lexerEvents = [];
  public ASTNode root;
  public List<ParserPhase> phases = [];
  public List<ParserMessage> messages = [];

  
  
  public ParserPhase stoppedParsingPhase = null;

  public virtual ExpressionParser GetExpressionParser()
  {
    return null;
  }

  public void Parse( string source )
  {
    this.source = source;

    foreach ( var p in phases )
    {
      p.Process( this );

      if ( p.hasStopError )
      {
        stoppedParsingPhase = p;
        return;
      }
    }
  }

  bool _hasErrors = false;
  public bool hasErrors => _hasErrors; 

  public void AddError( string message, params TextSelection[] textSelections )
  {
    AddMessage( MessageType.Error, message, textSelections );    
  }

  public void AddMessage( MessageType type, string message, params TextSelection[] textSelections )
  {
    var pm = new ParserMessage();
    pm.message = Message.Create( type, message );

    if ( textSelections != null && textSelections.Length > 0 )
    {
      pm.selections.AddRange( textSelections );
    }

    messages.Add( pm );

    if ( type == MessageType.Error )
    {
      _hasErrors = true;
    }
  }
}