// arduino stand timer ii
// pkvi
#include <TM1637Display.h>
#define CLK 9
#define DIO 10
TM1637Display display = TM1637Display(CLK, DIO);
#include "FastLED.h"
#define NUM_LEDS 2
#define LED_TYPE WS2812B
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];
const int NEO = 3;
int num;
int num_pre;
int num_set;
int num_dis;
int num_out;
int num_sto;
int col;
const int time_pot = A5;
const int button = 6;
const int vibrate = 11;
const int photo = A3;
int state;
int up;
int more;
int p;
void setup() {
  Serial.begin(9600);
  display.clear();
  display.setBrightness(2);
  FastLED.addLeds<LED_TYPE, NEO, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
  pixel(0, 0, 255);
  pinMode(button, INPUT_PULLUP);
  pinMode(vibrate, OUTPUT);
  digitalWrite(vibrate, LOW);
}
void loop() {
  if (state == 0) {
    // select minutes 1-60
    // wait for button
    while (digitalRead(button) == HIGH) {
      num = analogRead(time_pot);
      num_pre = map(num, 1023, 0, 1, 30);
      num_set = round(num_pre);
      num_set = num_set * 100;
      display.showNumberDecEx(num_set, 0b01000000, false, 4, 0);
    }
    num_sto = num_pre;
    state = 1;
    pixel(0, 0, 0);
  } else if (state == 1) {
    // minute count down
    for (num_out = num_pre; num_out > 1; num_out--) {
      num_dis = num_out * 100;
      display.showNumberDecEx(num_dis, 0b01000000, false, 4, 0);
      delay(60000);
    }
    state = 2;
  } else if (state == 2) {
    // 60 second count down
    for (num_dis = 60; num_dis > 0; num_dis--) {
      display.showNumberDecEx(num_dis, 0b01000000, false, 4, 0);
      delay(1000);
    }
    state = 3;
  } else if (state == 3) {
    // warning
    pixel(255, 0, 0);
    display.clear();
    alert();
    // standing limit
    pixel(0, 0, 255);
    display.showNumberDecEx(100, 0b01000000, false, 4, 0);
    delay(1000);
    for (num_dis = 59; num_dis > 0; num_dis--) {
      display.showNumberDecEx(num_dis, 0b01000000, false, 4, 0);
      delay(500);
      photo_read();
      if (more == 0) {
        while (more == 0) {
          // no cheating
          alert();
        }
      }
    }
    // wait for reset
    photo_read();
    pixel(0, 255, 0);
    num_pre = num_sto;
    num_dis = num_pre * 100;
    display.showNumberDecEx(num_dis, 0b01000000, false, 4, 0);
    while (more > 0) {
      photo_read();
    }
    state = 1;
    pixel(0, 0, 0);
  } else {
    // ayh
  }
}
void alert() {
  photo_read();
  while (more == 0) {
    digitalWrite(vibrate, HIGH);
    delay(1000);
    digitalWrite(vibrate, LOW);
    delay(500);
    photo_read();
  }
}
void photo_read() {
  up = 0;
  more = 0;
  for (p = 0; p < 20; p++) {
    up = analogRead(photo);
    more = more + up;
    delay(25);
  }
}
void pixel(int r, int g, int b) {
  for (int w = 0; w < NUM_LEDS; w++) {
    leds[w] = CRGB (r, g, b);
    FastLED.show();
  }
}