using SFML.Graphics;
using SFML.System;

namespace Car_simulation.UI.Instruments
{
    public class Tachometer
    {
        private RectangleShape _background;
        private RectangleShape _needle;
        private Font _font;
        private Text _label;
        private Text _rpmText;
        private Color _normalColor = Color.White;
        private Color _warningColor = new Color(255, 100, 100);

        public Vector2f Position { get; set; }
        public float Size { get; set; } = 200f;

        private float _currentRPM = 0f;
        private float _maxRpm = 7000f;

        public Tachometer(Font font, Vector2f position, float size, float maxRpm)
        {
            _maxRpm = maxRpm;
            _font = font;
            Position = position;
            Size = size;
            Initialize();
        }

        private void Initialize()
        {
            // Background
            _background = new RectangleShape(new Vector2f(Size, Size));
            _background.Position = Position;
            _background.FillColor = new Color(40, 40, 50);
            _background.OutlineThickness = 2;
            _background.OutlineColor = Color.White;

            // Needle
            float needleLength = Size * 0.4f;
            _needle = new RectangleShape(new Vector2f(needleLength, 4));
            _needle.Position = new Vector2f(
                Position.X + Size / 2,
                Position.Y + Size / 2
            );
            _needle.FillColor = Color.Red;
            _needle.Origin = new Vector2f(needleLength * 0.875f, 2); // Offset origin to create pivot point

            // Labels
            _label = new Text("RPM", _font, (uint)(Size * 0.1f));
            _label.FillColor = Color.White;
            _label.Position = new Vector2f(
                Position.X + Size / 2 - _label.GetLocalBounds().Width / 2,
                Position.Y + Size * 0.80f
            );

            _rpmText = new Text("0", _font, (uint)(Size * 0.12f));
            _rpmText.FillColor = _normalColor;
            _rpmText.Position = new Vector2f(
                Position.X + Size / 2 - 20,
                Position.Y + Size
            );
        }

        public void Update(float rpm)
        {
            _currentRPM = rpm;

            float rpmRatio = Math.Clamp(rpm / _maxRpm, 0f, 1f);
            float needleAngle = -45 + (270 * rpmRatio);
            _needle.Rotation = needleAngle;

            // Update RPM text
            _rpmText.DisplayedString = $"{rpm:F0}";

            // Center RPM text
            FloatRect bounds = _rpmText.GetLocalBounds();
            _rpmText.Origin = new Vector2f(bounds.Width / 2, bounds.Height / 2);
            _rpmText.Position = new Vector2f(
                Position.X + Size / 2,
                Position.Y + Size * 0.35f
            );
        }

        public void Draw(RenderWindow window)
        {
            window.Draw(_background);

            DrawTickMarks(window);

            window.Draw(_needle);
            window.Draw(_label);
            window.Draw(_rpmText);
        }

        private void DrawTickMarks(RenderWindow window)
        {
            float targetAngle = 270;
            int marks = (int)MathF.Ceiling(_maxRpm / 1000) * 2;

            for (int i = marks; i >= 0; i--)
            {
                float angle = 135 + (i * (targetAngle / marks)); // 270° divided into 10 segments
                float startRadius = Size * 0.45f;
                float endRadius = Size * 0.42f;

                if (i % 2 == 0) // Major tick
                {
                    endRadius = Size * 0.38f;

                    float rpmValue = (i * 1000);
                    Text label = new Text($"{rpmValue / 2000:F0}", _font, 12);
                    label.FillColor = Color.White;

                    float labelRadius = Size * 0.32f;
                    float _radAngle = angle * (float)Math.PI / 180f;
                    Vector2f labelPos = new Vector2f(
                        Position.X + Size / 2 + labelRadius * (float)Math.Cos(_radAngle),
                        Position.Y + Size / 2 + labelRadius * (float)Math.Sin(_radAngle)
                    );

                    FloatRect bounds = label.GetLocalBounds();
                    label.Origin = new Vector2f(bounds.Width / 2, bounds.Height / 2);
                    label.Position = labelPos;
                    window.Draw(label);
                }

                float radAngle = angle * (float)Math.PI / 180f;
                Vector2f startPos = new Vector2f(
                    Position.X + Size / 2 + startRadius * (float)Math.Cos(radAngle),
                    Position.Y + Size / 2 + startRadius * (float)Math.Sin(radAngle)
                );
                Vector2f endPos = new Vector2f(
                    Position.X + Size / 2 + endRadius * (float)Math.Cos(radAngle),
                    Position.Y + Size / 2 + endRadius * (float)Math.Sin(radAngle)
                );

                Vertex[] line = new Vertex[2]
                {
                    new Vertex(startPos, Color.White),
                    new Vertex(endPos, Color.White)
                };

                window.Draw(line, PrimitiveType.Lines);
            }
        }

        public void SetPosition(Vector2f position)
        {
            Position = position;
            Initialize(); // Re-initialize with new position
        }

        public void SetSize(float size)
        {
            Size = size;
            Initialize(); // Re-initialize with new size
        }
    }
}