// Tyler Rigsby, CSE 142
// Prints a mirror figure using ASCII characters

// Note: I have included here the drawings, loop tables, and pseudocode
// used in class to illustrate our progression. These should all be left
// out of your personal code when you turn in.

/*

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

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

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

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

*/
public class Mirror {
    
    public static final int SIZE = 3;
    
    public static void main(String[] args) {
        drawLine();
        drawTopHalf();
        drawBottomHalf();
        drawLine();
    }
    
    // #================#
    public static void drawLine() {
        System.out.print("#");
        for (int equals = 1; equals <= 4 * SIZE; equals++) {
            System.out.print("=");
        }
        System.out.println("#");
    }
    
    /*
    |      <><>      | 1    
    |    <>....<>    | 2
    |  <>........<>  | 3
    |<>............<>| 4

    line    dots        4 * line    4 * line - 4
    1       0           4           0
    2       4           8           4
    3       8           12          8
    4       12          16          12

    line    spaces      -2 * line   -2 * line + 8
    1       6           -2          6
    2       4           -4          4
    3       2           -6          2
    4       0           -8          0
    */
    // Draws the top half of the mirror figure
    public static void drawTopHalf() {
        /*
        for (each of 4 lines) {
            |
            some spaces (decreasing)
            <>
            some dots (increasing)
            <>
            some spaces (decreasing)
            |
        }
        */
        for (int line = 1; line <= SIZE; line++) {
            System.out.print("|");
            for (int spaces = 1; spaces <= -2 * line + 2 * SIZE; spaces++) {
                System.out.print(" ");
            }
            System.out.print("<>");
            for (int dots = 1; dots <= 4 * line - 4; dots++) {
                System.out.print(".");
            }       
            System.out.print("<>");
            for (int spaces = 1; spaces <= -2 * line + 2 * SIZE; spaces++) {
                System.out.print(" ");
            }
            System.out.println("|");
        }
    }
    
    // Draws the bottom half of the mirror figure
    public static void drawBottomHalf() {
        // same as above, just with line taking the values in the reverse order
        for (int line = SIZE; line >= 1; line--) {
            System.out.print("|");
            for (int spaces = 1; spaces <= -2 * line + 2 * SIZE; spaces++) {
                System.out.print(" ");
            }
            System.out.print("<>");
            for (int dots = 1; dots <= 4 * line - 4; dots++) {
                System.out.print(".");
            }       
            System.out.print("<>");
            for (int spaces = 1; spaces <= -2 * line + 2 * SIZE; spaces++) {
                System.out.print(" ");
            }
            System.out.println("|");
        }
    }

}

/* loop tables for constant:

const       expression ( )
3           -2 * line + 6
4           -2 * line + 8
SIZE        -2 * line + 2 * SIZE

constant    expression (=)
3           12
4           16
SIZE        4 * SIZE     */