// Copyright 1999
// College of Computer Science
// Northeastern University Boston MA 02115

// This software may be used for educational purposes as long as this copyright
// notice is retained at the top of all files

// Should this software be modified, the words "Modified from Original" must be
// included as a comment below this notice

// All publication rights are retained.  This software or its documentation may
// not be published in any media either in whole or in part.

///////////////////////////////////////////////////////////////////////////////

// House.cpp
//
// Simple example of a class and its use

///////////////////////////////////////////////////////////////////////////////

// The standard include files that include traditional C and C++ headers and
// many other Core Tools headers ... see CHeaders.h for additional details

#include "IOTools.h"
#include "Graphics.h"
#include "Random.h"

// Enter project specific include files here as well as classes and functions
// that you choose to define in the main shell rather than in separate files

///////////////////////////////////////////////////////////////////////
// Define a class house that represents a house
// The base of the house is a rectangle
// The roof is pecified by its height
// Draw function paints black base with a picture window and a red roof
class House{
	short x1;						// left side
	short y1;						// top of the base
	short x2;						// right side
	short y2;						// the bottom
	short height;					// roof height

	
	// make sure that the house fits inside the graphics window
	House& Verify(){
		if (x1 < 0)					// check the left side
			x1 = 0;
		if (x2 > 300)				// check the right side
			x2 = 300;
		if (y1 < 0)					// check the top of the house base
			y1 = 0;
		if (y2 > 300)				// check the bottom of the house
			y2 = 300;
		if (y1 - height < 0)		// check the roof
			height = y1;

		return *this;
	};

public:
	// default constructor - makes a big house
	House(){
		x1 = 0; 
		y1 = 100;
		x2 = 300;
		y2 = 300;
		height = 100;
	};

	// use four coordinates and the roof height to set the house data
	House& Set(short X1, short Y1, short X2, short Y2, short Height){

		x1 = X1;
		y1 = Y1;
		x2 = X2; 
		y2 = Y2;
		height = Height;

		return Verify();			// modify data so the house fits in
									// and return the 'new' house object
	};
	
	// use two points and the roof height to set the house data
	House& Set(const PointData& TL, const PointData& BR, short Height){

		TL.Get(x1, y1);				// Top Left point of the base
		BR.Get(x2, y2);				// Bottom Right point of the base
		height = Height;            // roof height

		Verify();					// modify data so the house fits in									
		return *this;				// and return the 'new' house object
	};

	// use four coordinates and the roof height to construct the house data
	House(short X1, short Y1, short X2, short Y2, short Height){
		Set(X1, Y1, X2, Y2, Height);
	};

	// use two points and the roof height to construct the house data
	House(const PointData& TL, const PointData& BR, short Height){
		Set(TL, BR, Height);
	};

	// return two points: top left and bottom right
	void GetBase(PointData& TL, PointData& BR){
		TL.Set(x1, y1);				// use Set function in class PointData
		BR.Set(x2, y2);				// use Set function in class PointData
	}

	// paint the house
	// function will be defined outside of the class definition
	// only the prototype is declared here
	const House& Draw() const;

}; // END of class House definition


// definition of the member function Draw for the class House
const House& House::Draw() const{

	// paint the base
	SetForeColor(0, 0, 0);					// the house is black
	PaintRect(x1, y1, x2, y2);

	// paint the window
	int dw = (x2 - x1)/4;
	int dh = (y2 - y1)/4;
	EraseRect(x1 + dw, y1 + dh, x2 - dw, y2 - dh);

	// paint the roof
	SetForeColor(255, 0, 0);				// the roof is red

	PolygonWidget PW;
	PW.ChangeMemory(4).SetFill();

	PW.Append(x1, y1);						// left base of the roof
	PW.Append(x2, y1);						// right base of the roof
	PW.Append((x1+x2)/2, y1-height);		// top of the roof

	PW.ClosePolygon().Draw();

	return *this;
};

void RowVillage(){

	// paint a row of random houses adjacent to each other
	cout << "Painting a row of houses." << endl;

	House H;

	SetRandomSeed();

	int cnt = 0;								// count number of houses

	int x = 0;									// left side
	int width = RandomLong(30,60);				// house width


	while ((x+width) <= 300){					// check if the house fits in

		int y = RandomLong(150,250);			// top of the house base
		int roof = RandomLong(20, 60);			// roof height

		cnt++;									// count this house

		H.Set(x, y, x+width, 300, roof).Draw();	// draw the house

		x += width;								// next house to the right
		int width = RandomLong(30,60);		// new width to see if it fits

		PressReturn("Next house");

	};

	cout << "We painted " << cnt << " houses." << endl;


};


void RandomVillage(){
	// paint ten random houses
	cout << "Painting ten random houses." << endl;

	int i;
	House H;

	int x1;								// left side
	int width;							// house width
	int y1;								// top of the house base
	int houseHeight;                    // house height
	int roofHeight;                     // roof height

	int cnt = 0;

	for (i = 0; i < 10; i++){

		// select the house size and location
		x1 = RandomLong(0,250);
		y1 = RandomLong(50,300);

		width = RandomLong(30,120);
		houseHeight = RandomLong(30, 100);

		roofHeight = RandomLong(20, 60);

		// paint the house
		H.Set(x1, y1, x1+width, y1+houseHeight, roofHeight).Draw();

	};

};



int main(int argc, char* argv[]) {

	// Use the following line if you choose NOT to open any graphics windows
	// InitializeConsole();

	// Build graphics window 0
	GraphicsWindow GW0(300, 300);

	// Move the console below graphics window 0
	ConsolePlaceBelow(0);

	// Give the console the focus for user interaction
	MakeConsoleForeground();

//////////

	// Enter the main program here

	// Build one house, paint it, change it and paint it again
	House H;
	H.Draw();

	PressReturn("Next house");

	ClearDrawing();

	// Reset the house data using two points and the height
	PointData A;							// new top left corner
	PointData C;							// new bottom right corner

	PointData OldTL;
	PointData OldBR;

	H.GetBase(OldTL, OldBR);				// retrieve old coordinates

	A.Request("Top left point:", OldTL);	// new top left
	C.Request("Bottom right point:", OldBR);// new bottom right

	H.Set(A, C, 50).Draw();					// build and draw the house

	PressReturn("Big House again");
	H.Set(OldTL, OldBR, 100).Draw();

	// Paint a row of houses
	PressReturn("Row houses");
	ClearDrawing();
	RowVillage();

	// Paint ten random houses (some may not fit in completely)
	PressReturn("Random houses");
	ClearDrawing();
	RandomVillage();


//////////

	// The lines below make sure that the graphics windows remain open just
	// before the program terminates

	PressReturn("\nThe main program is about to terminate\n");

	return 0;
}