// File: ex4-12l.h – Line class header file

#ifndef LINE_H
#define LINE_H

#include "ex4-12p.h"	// include Point header file

class Line
{
private:
    Point p1;
    Point p2;
    double a, b, c; // coefficients for equation of a Line
public:
    // Constructors

    // Create Line using two Points
    Line(const Point& pp1, const Point& pp2);

    // Create Line using coefficients for the equation of a Line
    Line(double c1, double c2, double c3);

    // Create Line parallel/perpendicular to a Line through a Point
    Line(const Point& p, const Line& l, const char* Line_type);

    // Create horizontal/vertical Line through a Point
    Line(const Point& p, const char* Line_type); // horiz/vert through pt

    // Create an offset Line from a given Line
    Line(const Line& l, double offset);

    // Create Line though a Point with a given lenght and and angle
    Line(const Point& p, double length, double angle);

    // Print Line: equation, Points, and slope
    void print(void) const;

    // Accessor functions

    double get_a(void) const
    {
        return a;
    }

    double get_b(void) const
    {
        return b;
    }

    double get_c(void) const
    {
        return c;
    }

    const Point& get_p1() const
    {
        return p1;
    }

    const Point& get_p2() const
    {
        return p2;
    }

    // Length of a Line (distance between two Points)
    double length(void) const;

    // Midpoint of a Line
    Point midpoint() const;

    // Slope of a Line
    double slope(void) const;

    // distance to a parallel Line
    double distance_to_Line(const Line&) const;

    // distance to a Point
    double distance_to_Point(const Point&) const;

    // x-intercept of a Line
    double x_intercept(void) const;

    // y-intercept of a Line
    double y_intercept(void) const;
};

#endif