using SFML.Graphics;
using SFML.System;

namespace Car_simulation.UI.Instruments
{
    public class Speedometer
    {
        private RectangleShape _background;
        private RectangleShape _needle;
        private Font _font;
        private Text _label;
        private Text _speedText;
        private Text _gearText;
        private Color _normalColor = Color.White;
        private Color _highlightColor = new Color(0, 150, 255);

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

        private float _currentSpeed = 0f;
        private string _currentGear = "N";
        private const float MAX_SPEED = 200f; // km/h

        public Speedometer(Font font)
        {
            _font = font;
            Initialize();
        }

        public Speedometer(Font font, Vector2f position, float size)
        {
            _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.Green;
            _needle.Origin = new Vector2f(needleLength * 0.875f, 2);

            // Labels
            _label = new Text("SPEED", _font, (uint)(Size * 0.1f));
            _label.FillColor = Color.White;
            _label.Position = new Vector2f(
                Position.X + Size / 2 - _label.GetLocalBounds().Width / 2,
                Position.Y + Size * 0.05f
            );

            _speedText = new Text("0 km/h", _font, (uint)(Size * 0.1f));
            _speedText.FillColor = _normalColor;
            _speedText.Position = new Vector2f(
                Position.X + Size / 2 - 40,
                Position.Y + Size * 0.25f
            );

            _gearText = new Text($"GEAR {_currentGear}", _font, (uint)(Size * 0.14f));
            _gearText.FillColor = _highlightColor;
            _gearText.Position = new Vector2f(
                Position.X + Size * 0.5f,
                Position.Y + Size * 1.1f
            );
        }

        public void Update(float speed)
        {
            _currentSpeed = speed;
            float speedKmh = speed * 3.6f;

            // Update needle angle (-90° to +180° rotation)
            float speedRatio = Math.Clamp(speedKmh / MAX_SPEED, 0f, 1f);
            float needleAngle = -90 + (270 * speedRatio);
            _needle.Rotation = needleAngle;

            // Update speed text
            _speedText.DisplayedString = $"{speedKmh:F1} km/h";

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

        public void UpdateGear(string gear)
        {
            _currentGear = gear;
            _gearText.DisplayedString = $"GEAR {gear}";

            // Center gear text
            FloatRect bounds = _gearText.GetLocalBounds();
            _gearText.Origin = new Vector2f(bounds.Width / 2, bounds.Height / 2);
            _gearText.Position = new Vector2f(
                Position.X + Size / 2,
                Position.Y + Size * 1.1f
            );
        }

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

            // Draw tick marks
            DrawTickMarks(window);

            window.Draw(_needle);
            window.Draw(_label);
            window.Draw(_speedText);
            window.Draw(_gearText);
        }

        private void DrawTickMarks(RenderWindow window)
        {
            for (int i = 0; i <= 10; i++)
            {
                float angle = -90 + (i * 27); // 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;

                    // Add number label for major ticks
                    float speedValue = (i * MAX_SPEED / 10f);
                    Text label = new Text($"{speedValue: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
        }

        public void SetGearColor(Color color)
        {
            _gearText.FillColor = color;
        }

        public void SetNeedleColor(Color color)
        {
            _needle.FillColor = color;
        }
    }
}