using CtrEditor.ObjetosSim;
using System;
using System.Collections.Generic;
using System.Diagnostics.Eventing.Reader;
using System.Numerics;
using System.Windows.Shapes;

public class Circle
{
    private Vector2 position;
    public float Left
    {
        get { return position.X; }
        set { position.X = value; }
    }
    public float Top
    {
        get { return position.Y; }
        set { position.Y = value; }
    }
    public float Diameter { get; set; }
    public float Mass { get; set; }
    public float AngleofMovement { get; set; }  // En grados
    public float Speed { get; set; }
    public float Overlap { get; set; }

    public Circle(float left = 0, float top = 0, float diameter = 10, float mass = 1, float angle = 0, float speed = 0)
    {
        position = new Vector2(left, top);
        Diameter = diameter;
        Mass = mass;
        AngleofMovement = angle;
        Speed = speed;
    }

    public void Move(float timeStep_ms, List<Circle> circles, List<Rectangle> rectangles, List<Line> lines)
    {
        // Convertir timeStep de milisegundos a segundos para la simulación
        float timeStepInSeconds = timeStep_ms / 1000.0f;
        bool isTracted = false; // Indicador para verificar si el círculo está siendo traccionado
        Overlap = 0;

        // Aplicar fuerza desde el rectángulo si está sobre uno
        foreach (var rectangle in rectangles)
        {
            float overlap = CalculateOverlapPercentage(this, rectangle);
            if (overlap > 0)
            {
                Overlap += overlap;
                isTracted = true; // El círculo está siendo traccionado por un rectángulo
                                  // Convertir la velocidad del rectángulo de metros por minuto a metros por segundo
                float rectangleSpeedInMetersPerSecond = rectangle.Speed / 60.0f;

                if (rectangleSpeedInMetersPerSecond < Speed)
                {
                    // Aplicar una fuerza de frenado si la velocidad del rectángulo es menor que la velocidad del círculo
                    float brakingForce = (Speed - rectangleSpeedInMetersPerSecond) * (overlap / 100.0f);
                    Speed -= brakingForce * timeStepInSeconds;
                }
                else
                {
                    // Alinear gradualmente la velocidad del círculo con la del rectángulo si es mayor
                    Speed += (rectangleSpeedInMetersPerSecond - Speed) * (overlap / 100.0f) * timeStepInSeconds;
                }

                AngleofMovement = rectangle.Angle;
            }
        }

        // Si el círculo no está siendo traccionado, aplicar desaceleración
        if (!isTracted)
        {
            float deceleration = (1.0f / Mass) * 10.0f; // Coeficiente de desaceleración inversamente proporcional a la masa
            Speed -= deceleration * timeStepInSeconds;
            if (Speed < 0) Speed = 0; // Evitar que la velocidad sea negativa
        }

        //// Interacción por impacto con otros círculos
        //foreach (var other in circles)
        //{
        //    if (this != other && IsColliding(this, other))
        //    {
        //        Vector2 impactDirection = other.position - this.position;
        //        Angle = (float)Math.Atan2(impactDirection.Y, impactDirection.X) * (180 / (float)Math.PI);
        //        Speed = other.Speed; // Asumimos que el círculo receptor adopta la velocidad del impacto
        //    }
        //}

        // Ajustar por superposición con otros círculos
        foreach (var other in circles)
        {
            if (this != other && IsColliding(this, other))
            {
                AdjustForOverlap(other);
            }
        }

        // Cambiar dirección al contacto con líneas
        foreach (var line in lines)
        {
            if (IsCollidingWithLine(this, line))
            {
                float impactAngle = CalculateImpactAngle(this, line);
                if (impactAngle < 85)
                {
                    AngleofMovement = line.Angle;
                }
                else if (impactAngle > 95)
                {
                    AngleofMovement = line.Angle + 180; // Movimiento contrario
                }
                else
                {
                    Speed = 0; // Cancelación de movimiento
                }
            }
        }

        // Calcular nueva posición
        Vector2 direction = new Vector2((float)Math.Cos(AngleofMovement * Math.PI / 180), (float)Math.Sin(AngleofMovement * Math.PI / 180));
        Vector2 velocity = direction * Speed * timeStepInSeconds;
        position += velocity;
    }



    private void AdjustForOverlap(Circle other)
    {
        if (this == other) return; // No auto-interacción

        float distance = Vector2.Distance(this.position, other.position);
        float radiusSum = (this.Diameter / 2) + (other.Diameter / 2);

        if (distance < radiusSum) // Los círculos están solapando
        {
            Vector2 directionToOther = Vector2.Normalize(other.position - this.position);
            float overlapDistance = radiusSum - distance;

            // Decidir qué círculo mover basado en sus velocidades
            if (this.Speed == 0 && other.Speed > 0)
            {
                // Mover este círculo si su velocidad es cero y el otro se está moviendo
                this.position -= directionToOther * overlapDistance;
            }
            else if (other.Speed == 0 && this.Speed > 0)
            {
                // Mover el otro círculo si su velocidad es cero y este se está moviendo
                other.position += directionToOther * overlapDistance;
            }
            else if (this.Speed == 0 && other.Speed == 0)
            {
                // Si ambos tienen velocidad cero, mover ambos a la mitad del solapamiento
                this.position -= directionToOther * (overlapDistance / 2);
                other.position += directionToOther * (overlapDistance / 2);
            }
        }
    }


    private bool IsColliding(Circle circle1, Circle circle2)
    {
        float distance = Vector2.Distance(circle1.position, circle2.position);
        float radiusSum = (circle1.Diameter / 2) + (circle2.Diameter / 2);
        return distance <= radiusSum;
    }

    private bool IsCollidingWithLine(Circle circle, Line line)
    {
        Vector2 nearestPoint = NearestPointOnLine(circle.position, line.start, line.end);
        float distanceToLine = Vector2.Distance(circle.position, nearestPoint);
        return distanceToLine <= (circle.Diameter / 2);
    }

    private Vector2 NearestPointOnLine(Vector2 point, Vector2 lineStart, Vector2 lineEnd)
    {
        Vector2 lineVector = lineEnd - lineStart;
        Vector2 pointVector = point - lineStart;
        float lineLength = lineVector.Length();
        float projectedLength = Vector2.Dot(pointVector, lineVector) / lineLength;
        projectedLength = Math.Max(0, Math.Min(lineLength, projectedLength)); // Clamping to the line segment
        return lineStart + lineVector * (projectedLength / lineLength);
    }

    private float CalculateImpactAngle(Circle circle, Line line)
    {
        Vector2 movementDirection = new Vector2((float)Math.Cos(circle.AngleofMovement * Math.PI / 180), (float)Math.Sin(circle.AngleofMovement * Math.PI / 180));
        Vector2 lineDirection = line.end - line.start;
        Vector2 lineNormal = new Vector2(-lineDirection.Y, lineDirection.X); // Rotar 90 grados para obtener normal
        lineNormal = Vector2.Normalize(lineNormal);

        // Calcular ángulo entre el movimiento y la normal de la línea
        float dotProduct = Vector2.Dot(movementDirection, lineNormal);
        float angle = (float)Math.Acos(dotProduct) * (180 / (float)Math.PI); // Convertir de radianes a grados

        // Ajustar para obtener el ángulo relativo correcto
        return angle < 90 ? 90 - angle : angle - 90;
    }

    public float CalculateOverlapPercentage(Circle circle, Rectangle rectangle)
    {
        // Convertir ángulo del rectángulo de grados a radianes
        float angleRadians = (float)(rectangle.Angle * Math.PI / 180);

        // Centro del círculo
        Vector2 circleCenter = new Vector2(circle.Left + circle.Diameter / 2, circle.Top + circle.Diameter / 2);
        float radius = circle.Diameter / 2;

        // Pivot del rectángulo es el Top Left
        Vector2 rectPivot = new Vector2(rectangle.Left, rectangle.Top);

        // Rotar el centro del círculo respecto al pivote del rectángulo
        Vector2 rotatedCircleCenter = RotatePoint(circleCenter, rectPivot, -angleRadians);

        // Comprobar si el círculo rotado intersecta con el rectángulo alineado
        // Rectángulo "alineado" asume que después de rotar el círculo, el rectángulo se comporta como si estuviera alineado con los ejes
        if (IsCircleRectangleIntersecting(rotatedCircleCenter, radius, rectPivot, rectangle.Length, rectangle.Width))
        {
            float overlapArea = EstimateOverlapArea(rotatedCircleCenter, radius, rectPivot, rectangle.Length, rectangle.Width);
            float circleArea = (float)(Math.PI * radius * radius);
            return (overlapArea / circleArea) * 100;
        }
        return 0;
    }


    private bool IsCircleRectangleIntersecting(Vector2 circleCenter, float radius, Vector2 rectTopLeft, float length, float width)
    {
        float closestX = Math.Max(rectTopLeft.X, Math.Min(circleCenter.X, rectTopLeft.X + length));
        float closestY = Math.Max(rectTopLeft.Y, Math.Min(circleCenter.Y, rectTopLeft.Y + width));

        float distanceX = circleCenter.X - closestX;
        float distanceY = circleCenter.Y - closestY;

        return (distanceX * distanceX + distanceY * distanceY) < (radius * radius);
    }



    private float EstimateOverlapArea(Vector2 circleCenter, float radius, Vector2 rectTopLeft, float length, float width)
    {
        float rectRight = rectTopLeft.X + length;
        float rectBottom = rectTopLeft.Y + width;
        float distToLeft = Math.Max(0, rectTopLeft.X - circleCenter.X);
        float distToRight = Math.Max(0, circleCenter.X - rectRight);
        float distToTop = Math.Max(0, rectTopLeft.Y - circleCenter.Y);
        float distToBottom = Math.Max(0, circleCenter.Y - rectBottom);
        float distToNearestEdge = Math.Min(Math.Min(distToLeft, distToRight), Math.Min(distToTop, distToBottom));

        if (distToNearestEdge >= radius)
            return 0; // No overlap

        float overlapRadius = radius - distToNearestEdge;
        float overlapArea = (float)(Math.PI * overlapRadius * overlapRadius);

        return Math.Min(overlapArea, (float)(Math.PI * radius * radius)); // Cap at circle area
    }



    private Vector2 RotatePoint(Vector2 point, Vector2 pivot, float angle)
    {
        float cosTheta = (float)Math.Cos(angle);
        float sinTheta = (float)Math.Sin(angle);
        // Ajustar punto por pivot antes de aplicar rotación
        Vector2 translatedPoint = new Vector2(point.X - pivot.X, point.Y - pivot.Y);
        // Rotar el punto
        Vector2 rotatedPoint = new Vector2(
            translatedPoint.X * cosTheta - translatedPoint.Y * sinTheta,
            translatedPoint.X * sinTheta + translatedPoint.Y * cosTheta
        );
        // Traducir el punto de vuelta
        return new Vector2(rotatedPoint.X + pivot.X, rotatedPoint.Y + pivot.Y);
    }


}

public class Rectangle
{
    private Vector2 position;
    public float Left
    {
        get { return position.X; }
        set { position = new Vector2(value, position.Y); }
    }
    public float Top
    {
        get { return position.Y; }
        set { position = new Vector2(position.X, value); }
    }
    public float Length { get; set; }
    public float Width { get; set; }
    public float Angle { get; set; }  // En grados
    public float Speed { get; set; }  // Velocidad del rectángulo

    public Rectangle(float left = 0, float top = 0, float length = 10, float width = 10, float angle = 0, float speed = 0)
    {
        position = new Vector2(left, top);
        Length = length;
        Width = width;
        Angle = angle;
        Speed = speed;
    }

}

public class Line
{
    public Vector2 start;
    public Vector2 end;

    public float Left
    {
        get { return start.X; }
        set { start = new Vector2(value, start.Y); UpdateEnd(); }
    }
    public float Top
    {
        get { return start.Y; }
        set { start = new Vector2(start.X, value); UpdateEnd(); }
    }
    public float Length { get; set; }
    public float Width { get; set; }
    public float Angle { get; set; }  // En grados

    public Line(float left, float top, float length, float width, float angle)
    {
        start = new Vector2(left, top);
        Length = length;
        Width = width;
        Angle = angle;
        UpdateEnd();
    }

    private void UpdateEnd()
    {
        // Asumiendo que la línea se extiende en el ángulo desde el punto de inicio
        end = new Vector2(start.X + Length * (float)Math.Cos(Angle * Math.PI / 180),
                          start.Y + Length * (float)Math.Sin(Angle * Math.PI / 180));
    }
}


// Clase principal que gestiona la simulación
public class SimulationManager
{
    public List<Circle> circles;
    public List<Rectangle> rectangles;
    public List<Line> lines;    


    public SimulationManager()
    {
        circles = new List<Circle>();
        rectangles = new List<Rectangle>();
        lines = new List<Line>();
    }

    public void Step(float timeStep)
    {
        foreach (var circle in circles)
        {
            circle.Move(timeStep, circles, rectangles, lines);
        }
    }
}