// Here is an annotated version of our program
// Note that the pseudocode, ASCII Art and loop
// tables are for your personal use in developing the program
// and should be removed before submitting a final version of
// the assignment.
//
// Our general development strategy:
//    1. Design the overall structure of the program by identifying
//       important shapes in the output and creating method headers for
//       these shapes.
//    2. For each method, write pseudocode to outline the algorithm for
//       drawing a shape
//    3. Build a loop table for each expression to map the line number
//       to the number of characters on that line
//    4. Once the code for the entire output is complete, add class constant
//       by comparing expressions between outputs of different sizes.
public class TapestryAnnotated {
   public static final int SIZE = 50;
   
   public static void main(String[] args) {
      /*
      
      #================#
       
      |      <><>      | 1 
      |    <>....<>    | 2
      |  <>........<>  | 3
      |<>............<>| 4
       
      |<>............<>| 4
      |  <>........<>  | 3 
      |    <>....<>    | 2
      |      <><>      | 1
      
      #================# 
      
      */
      
      fringe();
      topHalf();
      bottomHalf();
      fringe();
   }
   
   /*
   const    =
   4        16
   3        12
   SIZE     4 * SIZE
   */
   public static void fringe() {
      // # 16 ='s #
      System.out.print("#");
      for (int equals = 1; equals <= 4 * SIZE; equals++) {
         System.out.print("=");
      }
      System.out.println("#");
   }
   
   /*
          
      |      <><>      |  1
      |    <>....<>    |  2
      |  <>........<>  |  3
      |<>............<>|  4
    
   line     spaces   -2 * line   -2 * line + 8
   1        6        -2          6
   2        4        -4          4
   3        2        -6          2
   4        0        -8          0
   
   Table to figure out constant (do this after completing default size)
   const    spaces
   4        -2 * line + 8
   3        -2 * line + 6
   SIZE     -2 * line + SIZE * 2
   
   
   
   line     dots     4 * line    4 * line - 4
   1        0        4           0
   2        4        8           4
   3        8        12          8
   4        12       16          12
   
   const    dots
   4        4 * line - 4
   3        4 * line - 4
   SIZE     4 * line - 4   
   
   */
   public static void topHalf() {
      /*
      for each of SIZE lines
         |
         some spaces
         <>
         some dots
         <>
         some spaces
         |
      */
      for (int line = 1; line <= SIZE; line++) {
         System.out.print("|");
         // Remember that partial line redundancy is OKAY, since we don't have
         // the tools to eliminate this type of redundany.
         for (int spaces = 1; spaces <= -2 * line + SIZE * 2; 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("|");
      }
   
   }
   
   /*
      |<>............<>| 
      |  <>........<>  | 
      |    <>....<>    | 
      |      <><>      |
      Notice that this is the reverse of the top half so we can just
      run our outter loop bakwards to flip the lines upside down. 
   */
   public static void bottomHalf() {
      for (int line = SIZE; line >= 1; line--) {
         System.out.print("|");
         for (int spaces = 1; spaces <= -2 * line + SIZE * 2; 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 + SIZE * 2; spaces++) {
            System.out.print(" ");
         }
         System.out.println("|");
      }
   }
}