#include "Game.h"
#include "SDLWindow.h"
#include <SDL.h>
#include <cmath>
#include <chrono>
#include <windows.h>


double UPDATE_INTERVAL = 0;
const int TICKS_PER_SECOND = 25;
const int SKIP_TICKS = 1000 / TICKS_PER_SECOND;
const int MAX_FRAMESKIP = 5;
int loops;
float interpolation;

float frameend = 0;
float framestart = 0;
bool ballSpeedZeroed = false;

double MS_PER_UPDATE = 1000 / 60;



Game::Game() : mWindow(1024, 720), mPlayer("paddle.jpg", mWindow.GetRenderer(), 500.0f, 500.0f), mPlayer2("paddle.jpg", mWindow.GetRenderer(), 900.0f, 150.0f),
mBall("be.jpg", mWindow.GetRenderer(), 100, 100, 0.001, 0)
{
    mQuit = false;
    EntityList.push_back(&mPlayer);
    EntityList.push_back(&mPlayer2);
    EntityList.push_back(&mBall);
}

void Game::Run()
{


    while (!mQuit)
    {

        if (UPDATE_INTERVAL < 1)
        {
            framestart = SDL_GetTicks();
            SDL_Delay(1);
            frameend = SDL_GetTicks();
            UPDATE_INTERVAL = frameend - framestart;
        }

        framestart = SDL_GetTicks();
        ProcessEvents();
        Update();
        Render();
        frameend = SDL_GetTicks();
        UPDATE_INTERVAL = frameend - framestart;

    }

}

Game::~Game()
{

}

void Game::ProcessEvents()
{


    while (SDL_PollEvent(&mEvent))
    {
        const Uint8* currentKeyStates = SDL_GetKeyboardState(NULL);

        if (mEvent.type == SDL_QUIT)
            mQuit = true;

        if (mEvent.type == SDL_KEYDOWN)
        {
            switch (mEvent.key.keysym.sym)
            {
            case SDLK_s:
                mPlayer.SetDownPressed(true);
                break;
            case SDLK_w:
                mPlayer.SetUpPressed(true);
                break;
            case SDLK_a:
                mPlayer.SetLeftPressed(true);
                break;
            case SDLK_d:
                mPlayer.SetRightPressed(true);
                break;
            }
        }

        if (mEvent.type == SDL_KEYUP)
        {
            switch (mEvent.key.keysym.sym)
            {
            case SDLK_s:
                mPlayer.SetDownPressed(false);
                break;
            case SDLK_w:
                mPlayer.SetUpPressed(false);
                break;
            case SDLK_a:
                mPlayer.SetLeftPressed(false);
                break;
            case SDLK_d:
                mPlayer.SetRightPressed(false);
                break;
            }
        }
    }
}

void Game::Update()
{
    mPlayer.HandleEvents(&mEvent);

    for (auto it = EntityList.begin(); it < EntityList.end(); ++it)
    {
        (*it)->Update(UPDATE_INTERVAL);
    }

}

void Game::Render()
{
    SDL_RenderClear(mWindow.GetRenderer());

    for (auto it = EntityList.begin(); it < EntityList.end(); ++it)
    {
        (*it)->draw(mWindow.GetRenderer());
    }

    SDL_RenderPresent(mWindow.GetRenderer());
}

std::vector<Entity*> Game::EntityList;