#include <math.h></math.h>

#include <stdio.h></stdio.h>

#include <helianthus.h></helianthus.h>

unsigned long long prevMonotonicMs;

int hours, minutes, seconds;

int mills;

int started;

int alarm;

Sound alarmSound;

void init() {

  alarmSound = createSound("data/sound/alarmclock.ogg");

}

void draw() {

  unsigned long long monotonicMs = windowGetMonotonicMilliseconds();

  int timeMs = (int)(monotonicMs - prevMonotonicMs);

  prevMonotonicMs = monotonicMs;

  if (started) {

    if (alarm) {

      mills += timeMs;

      while(mills >= 1000) mills -= 1000;

    } else {

      mills += timeMs;

      while(mills >= 1000) { mills -= 1000; --seconds; }

      while(seconds < 0) { --minutes; seconds += 60; }

      while(minutes < 0) { --hours; minutes += 60; }

      if (hours < 0 || (hours == 0 && minutes == 0 && seconds == 0)) {

        hours = 0;

        minutes = 0;

        seconds = 0;

        alarm = TRUE;

        soundPlay(alarmSound, TRUE);

      }

    }

  }

  saveState();

  translate( windowGetWidth()/2.0, windowGetHeight()/2.0 );

  textAlign(HALIGN_CENTER, VALIGN_CENTER);

  double size = 100;

  int *values[3] = { &hours, &minutes, &seconds };

  for(int i = 0; i < 3; ++i) {

    int *value = values[i];

    saveState();

    translate( (i-1)*size, 0 );

    textSize(64);

    if (alarm) stroke(colorByRGBA(0, 0, 0, mills*0.001));

    double mx = mouseTransformedX();

    double my = mouseTransformedY();

    if (fabs(mx) <= 0.45*size && fabs(my) <= 0.45*size) {

      *value += mouseScrolledY();

      while(*value <   0) *value += 60;

      while(*value >= 60) *value -= 60;

      if (mouseWentDown("left")) *value = 0;

      if (mouseWentDown("right")) *value = 30;

    }

    textf(-0.2*size, 0, "%d", *value / 10);

    textf( 0.2*size, 0, "%d", *value % 10);

    if (i > 0) {

      translate( -size/2, 0 );

      text(0, 0, ":");

    }

    restoreState();

  }

  if (started) {

    saveState();

    strokeWidth(0.1*size);

    if (alarm) stroke(colorByRGBA(0, 0, 0, mills*0.001)); else rotate(-60*0.001*mills);

    for(int i = 0; i < 12; ++i) {

      point(2*size, 0);

      rotate(-30);

    }

    restoreState();

  }

  saveState();

  {

    noFill();

    textSize(24);

    double buttonWidth = size*1.5;

    double buttonHeight = size*0.5;

    translate(-0.5*buttonWidth, 0.75*size);

    double mx = mouseTransformedX();

    double my = mouseTransformedY();

    int click = mouseWentDown("left") && fabs(mx) <= 0.4*buttonWidth && fabs(my) <= 0.4*buttonHeight;

    rect(-0.4*buttonWidth, -0.4*buttonHeight, 0.8*buttonWidth, 0.8*buttonHeight);

    if (started) {

      text(0, 0, "pause");

      if (click) {

        soundStop(alarmSound);

        started = alarm = FALSE;

      }

    } else {

      text(0, 0, "start");

      if (click) { mills = 0; started = TRUE; }

    }

    translate(buttonWidth, 0);

    mx -= buttonWidth;

    click = mouseWentDown("left") && fabs(mx) <= 0.4*buttonWidth && fabs(my) <= 0.4*buttonHeight;

    rect(-0.4*buttonWidth, -0.4*buttonHeight, 0.8*buttonWidth, 0.8*buttonHeight);

    text(0, 0, "reset");

    if (click) {

      soundStop(alarmSound);

      started = alarm = FALSE;

      hours = minutes= seconds = 0;

    }

  }

  restoreState();

  restoreState();

}

int main() {

  windowSetTitle("Timer");

  windowSetVariableFrameRate();

  windowSetInit(&init);

  windowSetDraw(&draw);

  windowRun();

  return 0;

}