/*
 *--------------------------------------
 * Program Name: UI_TEST
 * Author: Erin L. Nova
 * License: CNPLv7+
 * Description: A test TI-84 UI program
 *--------------------------------------
*/

#include <tice.h>
#include <keypadc.h>
#include <stdio.h>

enum Directions {
  None,
  Left,
  Right,
  Up,
  Down,
};

int print(const char *string, int x, int y) { // Function to easily print to a location on screen
  os_SetCursorPos(x, y);
  os_PutStrFull(string);
  return 0;
}

int clearLine(int x) {
  os_SetCursorPos(x, 0);
  os_PutStrFull("                             ");
  return 0;
}

int print_ui(enum Directions direction, int prev_index) {
  os_SetCursorPos(0, 0); // Reset cursor position

  print("Test: ", 0, 0);
  
  int index = prev_index;

  int num_items = 3;

  char *items[8];
  items[0] = "\[ ] one";
  items[1] = "\[ ] two";
  items[2] = "\[ ] three";

  switch (direction) {
    case Down:
      if (index != num_items-1) {
        index++;
      } else {
        index = 0;
      }
      break;
    case Up:
      if (index != 0) {
        index--;
      } else {
        index = num_items-1;
      }
      break;
  }

  items[index] = "\[x] three";

  int i;
  for (i = 0; i < num_items; i++) {
    clearLine(i+1);
    print(items[i], i+1, 2);
  }

  print("<Enter> pressed: ", num_items+2, 0);

  return index;
}

void get_input() {
  // Key variable
  kb_key_t key, dir_key, prev_key, prev_dir_key;

  int counter = 0;
  int index = 0;

  // Loop until 2nd is pressed
  do {
    // Update kb_Data
    prev_key = kb_Data[6];
    prev_dir_key = kb_Data[7];
    kb_Scan();

    // Load group registers
    key = kb_Data[6];
    dir_key = kb_Data[7];

    char str[25];   

    // Make sure it's a new press
    if (key != prev_key) {
      // Check what key it is
      switch (key) {
        case kb_Enter:
          sprintf(str, "%d", counter);
          print(str, 5, 17);
          counter++;
          break;
        
        default:
          break;
      }
    }
    
    // Make sure it's a new press
    if (dir_key != prev_dir_key) {
      // Check what key it is
      switch (dir_key) {
        case kb_Down:
          index = print_ui(Down, index);
          break;
        case kb_Up:
          index = print_ui(Up, index);
          break;
      }
    }
  } while (kb_Data[6] != kb_Clear);
}

int main(void) {
  os_ClrHome(); // Clear the screen
  print_ui(None, 0);

  get_input();

  // Wait for input
  while (!os_GetCSC());
  return 0;
}