// CSE 143 
// Homework 5 
// http://www.cs.washington.edu/education/courses/143/00su/homework/ 
// 30 Jul 2000, Ken Yasuhara


#include <stdlib.h>
#include "gp142.h"
#include "fireworksdisplay.h"


//////////////////////////////////////////////////////////////////////
// constructors, destructor

// slowdownFactor's default value is 1
FireworksDisplay::FireworksDisplay(const char scriptFilename[],
                                   const int slowdownFactor) 
  : script(scriptFilename)
{
  fireworkCount = 0;
  for (int i = 0; i < MAX_FIREWORK_COUNT; i++) {
    fireworks[i] = NULL;
  }

  backgroundObjectCount = 0;
  for (i = 0; i < MAX_BACKGROUND_OBJECT_COUNT; i++) {
    backgroundObjects[i] = NULL;
  }

  time = 0;
  assert(slowdownFactor > 0);
  periodicEventsPerFrame = slowdownFactor;

  script.getNextFirework(nextFirework, nextFireworkLaunchTime);

  // sets whether or not to animate; Run is an enum
  // animation can also be turned on and off by the end-user 
  // via choices on the graphics window RUN menu
  display.setAnimation(Run); 
}


//////////////////////////////////////////////////////////////////////
// managing backgroundObjects, fireworks

void
FireworksDisplay::addScheduledFireworks() 
{
  while (nextFirework != NULL && nextFireworkLaunchTime <= time) { 
    if (nextFireworkLaunchTime < time) {
      printf("FireworksDisplay:  launched out-of-order firework late\n");
    }
    addFirework(nextFirework);
    script.getNextFirework(nextFirework, nextFireworkLaunchTime);
  }
}


//////////////////////////////////////////////////////////////////////
// animation

void
FireworksDisplay::paintFrame() 
{
  // paint background first, so foreground elements appear as though
  // they're closer
  paintBackground();
  paintFireworks();

  // forces redraw; effects of paint might not appear on screen otherwise
  display.flush();
}


void
FireworksDisplay::waitUntilNextFrame() 
{
  int periodicEventCount = 0;
  while (periodicEventCount < periodicEventsPerFrame) {
    // don't really need mouse/keyboard event info, but need to 
    // pass something in for ref. params.
    int mouseX, mouseY;
    char keyPress;
    GP142Event nextGP142Event = 
      display.getNextEvent(mouseX, mouseY, keyPress);

    if (nextGP142Event == Periodic)
      periodicEventCount++;
    else if (nextGP142Event == Quit)
      exit(0);
  }
}