#define OLC_PGE_APPLICATION
#include"olcPixelGameEngine.h"
#include <random>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
struct coord
{
    int x;
    int y;
};


class animation : public olc::PixelGameEngine
{
public:
    animation()
    {
        sAppName = "animation";
    }

    //initialise some variables
    float speed = 500.0;
    //setting number of raindrops
    coord rainDropPositions[120];
    // setting number of the depthbuffer
    coord dB[1304]; //dB, short for depthBuffer
    void CreateRain()
    {
        int i = rainDrops;
        if (rainDrops < maxRainDrops)
        {
            rainDropPositions[i].x = rand() % ScreenWidth();// spawn with random position on screen
            rainDropPositions[i].y = 1; // spawn at top of screen
            rainDrops++; // change value of rainDops by + 1
        }
    }

    void UpdateRain(float fElapsedTime)
    {
        //for every rainDrops
        for (int i = 0;i < rainDrops; i++)
        {
            // move the rain downwards
            rainDropPositions[i].y += fElapsedTime * speed;

            // if the raindrops are in the depthBuffer, draw them, else, spawn them somewhere at the top of the screen
            if (dB[rainDropPositions[i].y].y < rainDropPositions[i].y)
            {
                DrawSprite(rainDropPositions[i].x, rainDropPositions[i].y, sprTexRain, 1);
            }
            else
            {
                //set y to top of screen and draw it at random x
                rainDropPositions[i].y = 1;
                rainDropPositions[i].x = rand() % ScreenWidth();
                DrawSprite(rainDropPositions[i].x, rainDropPositions[i].y, sprTexRain, 1);
            }
        }
    }



private:
    // set up sprites
    olc::Sprite* sprTexAll;
    olc::Sprite* sprTexRain;

    // initialise variables
    int maxRainDrops = 120;
    int rainDrops = 1;

    dB[4].y = 4;

public:
    bool OnUserCreate() override
    {
        srand(time(0));
        sprTexRain = new olc::Sprite("weiss hintergrund regentropfen.jpeg");
        sprTexAll = new olc::Sprite("haus und hintergrund sukeesh projektlernen.jpeg");
        return true;
    }

    bool OnUserUpdate(float fElapsedTime) override
    {
         //Draw Main house
         DrawSprite(0, 0, sprTexAll, 1);
         // too obvious what this does ...?
         CreateRain();
         // move the rain
         UpdateRain(fElapsedTime);
         return true;
    }
};



int main()
{
    animation demo;
    if (demo.Construct(1303, 733, 1, 1))
        demo.Start();
    return 0;
}