// CSE 142 Lecture 4
// Nested loops cont., class constants

/*
Note: long comments are to help you remember the
process I followed in class. The comments in the code you
turn in should not include pseudo-code or loop tables.

#================#

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

#================#

#, 16 =, #

for each of 4 lines
	|, some spaces (decreasing), <>, some dots (increasing), <>, same number of spaces, |
	
same 4 lines, but upside-down

#, 16 =, #
*/

// Draw an ascii art mirror that can scale based on SIZE constant.
public class Mirror {
	public static final int SIZE = 4;

	public static void main(String[] args) {
		line();
		top();
		bottom();
		line();
	}
	
	// Prints the line at the top and bottom of the figure
	public static void line() {
		System.out.print("#");
		
		// Determine the relationship between SIZE and number of equals signs
		// SIZE	equals	SIZE * 4
		// 3		12			12
		// 4		16			16
		// 5		20			20
		for (int i = 1; i <= SIZE * 4; i++) {
			System.out.print("=");
		}
		System.out.println("#");
	}
	
	// Prints the top half of the mirror
	public static void top() {
		for (int line = 1; line <= SIZE; line++) {
			System.out.print("|");
			
			// Determine the relationship between line number and spaces for SIZE = 4
			// line	spaces	line * -2	line * -2 + 8 (here 8 is our offset)
			// 1		6			-2				6
			// 2		4			-4				4
			// 3		2			-6				2
			// 4		0			-8				0
			
			// Determine the relationship between line number and spaces for SIZE = 3
			// line	spaces	line * -2	line * -2 + 6 (here 6 is our offset)
			// 1		4			-2				4
			// 2		2			-4				2
			// 3		0			-6				0
			
			// Determine the relationship between SIZE and the offset calculated
			// in the previous two loop tables
			// SIZE	offset	SIZE * 2
			// 3		6			6
			// 4		8			8
			for (int i = 1; i <= line * -2 + SIZE * 2; i++) {
				System.out.print(" ");
			}
			
			System.out.print("<>");
			
			// line	dots	line * 4		line * 4 - 4
			// 1		0		4				0
			// 2		4		8				4
			// 3		8		12				8
			// 4		12		16				12
			for (int i = 1; i <= line * 4 - 4; i++) {
				System.out.print(".");
			}
			
			System.out.print("<>");
			
			for (int i = 1; i <= line * -2 +  SIZE * 2; i++) {
				System.out.print(" ");
			}
			
			System.out.println("|");
		}
	}
	
	// Prints the bottom half of the mirror
	public static void bottom() {
		// Just run the line numbers in reverse!
		for (int line = SIZE; line >= 1; line--) {
			System.out.print("|");
			
			for (int i = 1; i <= line * -2 +  SIZE * 2; i++) {
				System.out.print(" ");
			}
			
			System.out.print("<>");
			
			for (int i = 1; i <= line * 4 - 4; i++) {
				System.out.print(".");
			}
			
			System.out.print("<>");
			
			for (int i = 1; i <= line * -2 +  SIZE * 2; i++) {
				System.out.print(" ");
			}
			
			System.out.println("|");
		}
	}
}