using Qrakhen.Qamp.Core;
using Qrakhen.Qamp.Core.Tokenization;
using System.Text;

public class ConsoleRenderer
{
    private readonly IReader<Token> _reader;
    private readonly Stream _stream;

    public ConsoleRenderer(Stream stream)
    {
        _stream = new MemoryStream();
        stream.Position = 0;
        stream.CopyTo(_stream);
        _reader = new Reader(_stream);
    }

    public void Render((int x, int y) position)
    {
        Console.CursorVisible = false;
        Console.SetCursorPosition(position.x, position.y);
        List<Token> tokens = [];        
        while (!_reader.Done) {
            tokens.Add(_reader.NextToken(true));
        }
        _stream.Position = 0;
        foreach (var token in tokens) {
            ConsoleColor color = ConsoleColor.Gray;
            if (token.Type.IsBoolean())
                color = ConsoleColor.Blue;
            if (token.Type.IsString())
                color = ConsoleColor.Magenta;
            if (token.Type.IsNumber())
                color = ConsoleColor.DarkCyan;
            if (token.Type.IsOperator())
                color = ConsoleColor.DarkGreen;
            if (token.Type.IsBracket())
                color = ConsoleColor.Red;
            if (token.Type.IsIdentifier())
                color = ConsoleColor.White;
            if (token.Type.IsControl())
                color = ConsoleColor.DarkYellow;
            if (token.Type == TokenType.Error)
                color = ConsoleColor.DarkRed;
            Console.ForegroundColor = color;
            byte[] buffer = new byte[token.Span.Length];
            _stream.ReadExactly(buffer, 0, (int)token.Span.Length);
            string str = Encoding.Default.GetString(buffer);
            Console.Write(str);
            Console.ForegroundColor = ConsoleColor.White;
            if (token.Type == TokenType.NewLine)
                Console.Write("  : ");
        }
        Console.ForegroundColor = ConsoleColor.White;
        Console.CursorVisible = true;
    }
}