// Helene Martin, CSE 142
// Prints a scalable diamond shape made of ASCII characters.

// NOTE: goals, pseudocode and loop tables should NOT appear in your final program's 
// comments.  They appear here so you can recall what we did in lecture.

// goal: demonstrate use of pseudocode and using loop tables to express complex
// patterns as loops.  Demonstrate use of a class constant.
/*
#================#

|      <><>      |1	
|    <>....<>    |2
|  <>........<>  |3	
|<>............<>|4
		
|<>............<>|4	
|  <>........<>  |3	
|    <>....<>    |2	
|      <><>      |1
	
#================#

line: #, 16 =, #

topHalf: repeat for 4 lines (|, some spaces, <>, some dots, <>, some spaces, |)
  
bottomHalf: repeat for 4 lines (|, some spaces, <>, some dots, <>, some spaces, |)

Scaling:
Note that only the spaces are different.  The number of dots is the SAME for size 3 or 4.
#============#
|    <><>    |
|  <>....<>  |
|<>........<>|
|<>........<>|
|  <>....<>  |
|    <><>    |
#============#
SIZE
4			line * -2 + 8
3			line * -2 + 6
SIZE		line * -2 + SIZE * 2
*/	

public class Diamond {
	public static final int SIZE = 3;
	
	public static void main(String[] args) {
		drawLine();
		drawTopHalf();
		drawBottomHalf();
		drawLine();
	}
	
	// line: #, 16 =, # -- we need to use a loop for scaling
	
	// prints a line of equal signs
	public static void drawLine() {
		System.out.print("#");
		for (int i = 1; i <= SIZE * 4; i++) {
			System.out.print("=");
		}
		System.out.println("#");
	}
	
	/*
	topHalf: repeat for 4 lines (|, some spaces, <>, some dots, <>, some spaces, |, new line)
|      <><>      |	
|    <>....<>    |	
|  <>........<>  |	
|<>............<>|

line	spaces	line * -2	line * -2 + 8	dots	line * 4	line * 4 -4
1		6			-2				6					0		4			0
2		4			-4				4					4		8
3		2			-6									8		12
4		0			
*/
	// draws an isosceles triangle that opens downwards
	public static void drawTopHalf() {
		for (int line = 1; line <= SIZE; line++) {
			System.out.print("|");
			for (int spaces = 1; spaces <= line * -2 + SIZE * 2; spaces++) {
				System.out.print(" ");
			}
			System.out.print("<>");
			for (int dots = 1; dots <= line * 4 - 4; dots++) {
				System.out.print(".");
			}
			System.out.print("<>");
			for (int spaces = 1; spaces <= line * -2 + SIZE * 2; spaces++) {
				System.out.print(" ");
			}
			System.out.println("|");
		}
	
	}
	
	// we noticed that the top and bottom are symmetrical and just ran
	// the loop the other way
	
	// draws an isosceles triangle that opens upwards
	public static void drawBottomHalf() {
		for (int line = SIZE; line >= 1; line--) {
			System.out.print("|");
			for (int spaces = 1; spaces <= line * -2 + SIZE * 2; spaces++) {
				System.out.print(" ");
			}
			System.out.print("<>");
			for (int dots = 1; dots <= line * 4 -4; dots++) {
				System.out.print(".");
			}
			System.out.print("<>");
			for (int spaces = 1; spaces <= line * -2 + SIZE * 2; spaces++) {
				System.out.print(" ");
			}
			System.out.println("|");
		}
	}
}