#include <Wire.h>
#include <Time.h>
#include <TimeLib.h>
#include <DS1307RTC.h>
#include <Adafruit_NeoPixel.h>

// Defines
#define HOURS_PIN     (9)
#define MINUTES_PIN   (10)
#define SECONDS_PIN   (11)
#define UP_PIN
#define DOWN_PIN
#define PIXEL_PIN    (5)
#define NUMPIXELS    (8)

#define HOUR_LED     (0)
#define AM_LED       (1)
#define MIN_LED      (2)
#define SEC_LED      (3)
#define PWR_LED      (4)

#define HOUR_SW      (6)
#define MIN_SW       (7)
#define SEC_SW       (8)

#define SET_POT      (A0)

#define RUN_STATE    (0x7)     // based on switches, they are active low 111b
#define VERIFY_STATE (0x20)
#define SET_HOUR_STATE (0x03)  // based on switches, they are active low 011b
#define SET_MIN_STATE  (0x05)  // based on switches, they are active low 101b
#define SET_SEC_STATE  (0x06)  // based on switches, they are active low 010b

#define STEPS_PER_HOUR  (1024/24)
#define STEPS_PER_MIN   ((1024/59)-1)
#define STEPS_PER_SEC   (STEPS_PER_MIN)

unsigned int hour_segments[24] = {43,85,128,171,213,256,300,341,384,427,469,512,554,597,640,683,725,768,811,853,896,939,981,1024};
unsigned int min_sec_segments[60] = {17,34,51,68,85,102,119,136,153,170,187,204,221,238,256,273,290,307,324,341,358,375,392,409,426,443,460,477,494,512,529,546,563,580,597,614,631,648,665,682,699,716,733,750,768,785,802,819,836,853,870,887,904,921,938,955,972,989,1006,1024};


Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIXEL_PIN, NEO_GRB + NEO_KHZ800);
tmElements_t tm;
bool AM  = false;
int  set_pot_value  = 0;
int  fsm_state    = RUN_STATE;

/*
--------------------------------------------
Setup function
--------------------------------------------
*/
void setup() {
  Serial.begin(57600);
  while (!Serial) ; // wait for serial
  delay(200);
  Serial.println("Dave's old school clock");
  Serial.println("-------------------");

  pinMode(HOURS_PIN, OUTPUT);   // sets the pin as output
  pinMode(MINUTES_PIN, OUTPUT);   // sets the pin as output
  pinMode(SECONDS_PIN, OUTPUT);   // sets the pin as output
  pinMode(HOUR_SW, INPUT_PULLUP);   // sets the pin as output
  pinMode(MIN_SW, INPUT_PULLUP);   // sets the pin as output
  pinMode(SEC_SW, INPUT_PULLUP);   // sets the pin as output
  pixels.begin(); // This initializes the NeoPixel library.
  // DNK HACK HACK
  // remove this later
  Serial.println("Setting Time in setup");
  set_default_time(tm);
}


/*
---------------------------------------------
main loop
The whole thing is run off of a finite state machine.
RUN_STATE = This is the normal operation mode
               Check if setting switch is not in run mode if not switch to VERIFY_STATE
               Check RTC for time
               Update meters
               Update LEDs
VERIFY_STATE = Checks to see if the set switch has stayed the same for 1 second
               If so Change the power led to RED, goto set state associated with switch settings
SET_HOUR_STATE = read switch to make sure still in the setting mode, if not save hour and move to next state
                 read POT, set time to reading
SET_MIN_STATE = same as above

SET_SEC_STATE = same as above

---------------------------------------------
*/
void loop() {
  static int count = 0;


  switch (fsm_state) {
    case RUN_STATE:
      fsm_state = run_state(fsm_state);
      break;

    case VERIFY_STATE:
      fsm_state = verify_state(fsm_state);
      break;

    case SET_HOUR_STATE:
    case SET_MIN_STATE:
    case SET_SEC_STATE:
      fsm_state = set_state(fsm_state, tm);
      break;
    default:
      // whoa! why did we get here?  reset the state machine
      fsm_state = RUN_STATE;
      break;
  }
  // update pixels everytime through the loop
  updatePixels( fsm_state, is_am());
  delay(100);
}


/*
----------------------------------------------------------------------
All other fun stuff
----------------------------------------------------------------------
*/