#include "raylib.h"
#include <stdio.h>
#include <stdlib.h>

int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 1280;
    const int screenHeight = 720;
    const int velocidady = 8;
    const int ballSize = 25;
    const int maxVelocity = 20;
    const int minVelocity = 8;

    bool pause = false;

    int score1p = 0;
    int score2p = 0;

    Rectangle paladerecha;

    paladerecha.width = 20;
    paladerecha.height = 100;
    paladerecha.x = screenWidth - 50 - paladerecha.width;
    paladerecha.y = screenHeight/2 - paladerecha.height/2;


    Rectangle palaizquierda;

    palaizquierda.width = 20;
    palaizquierda.height = 100;
    palaizquierda.x = 50;
    palaizquierda.y = screenHeight/2 - palaizquierda.height/2;


    Vector2 ball;
    ball.x = screenWidth/2;
    ball.y = screenHeight/2;

    Vector2 ballVelocity;
    ballVelocity.x = minVelocity;
    ballVelocity.y = minVelocity;

    InitWindow(screenWidth, screenHeight, "raylib [core] example - basic window");

    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        // Gestiono pulsaciones botones
        if(!pause){
            if (IsKeyDown(KEY_Q)){
              palaizquierda.y -= velocidady;
            }

            if (IsKeyDown(KEY_A)){
              palaizquierda.y += velocidady;
            }

            if (IsKeyDown(KEY_UP)){
              paladerecha.y -= velocidady;
            }

            if (IsKeyDown(KEY_DOWN)){
              paladerecha.y += velocidady;
            }
        }

        if (IsKeyPressed(KEY_P)){
          pause = !pause;
        }

        //Consulto Limites
        if(palaizquierda.y<0){
            palaizquierda.y = 0;
        }

        if(palaizquierda.y > (screenHeight - palaizquierda.height)){
            palaizquierda.y = screenHeight - palaizquierda.height;
        }

        if(paladerecha.y<0){
            paladerecha.y = 0;
        }

        if(paladerecha.y > (screenHeight - paladerecha.height)){
            paladerecha.y = screenHeight - paladerecha.height;
        }

        //Gestionamos el movimiento de la Bola
        if(!pause){
            ball.x += ballVelocity.x;
            ball.y += ballVelocity.y;
        }

        //Aqui marcamos gol
        if(ball.x > screenWidth - ballSize){
            //Marca la pala izquierda
            score1p++;
            ball.x = screenWidth/2;
            ball.y = screenHeight/2;
            ballVelocity.x = -minVelocity;
            ballVelocity.y = minVelocity;

        }else if(ball.x < ballSize){
            //Marca la pala derecha
            score2p++;
            ball.x = screenWidth/2;
            ball.y = screenHeight/2;
            ballVelocity.x = minVelocity;
            ballVelocity.y = minVelocity;
        }

        if((ball.y > screenHeight - ballSize) || (ball.y < ballSize) ){
            ballVelocity.y *=-1;
        }


        if(CheckCollisionCircleRec(ball, ballSize, paladerecha)){
            if(ballVelocity.x>0){
                if(abs(ballVelocity.x)<maxVelocity){
                    ballVelocity.x *=-1.5;
                    ballVelocity.y *= 1.5;
                }else{
                    ballVelocity.x *=-1;
                }
            }
        }

        if(CheckCollisionCircleRec(ball, ballSize, palaizquierda)){
            if(ballVelocity.x<0){
                if(abs(ballVelocity.x)<maxVelocity){
                    ballVelocity.x *=-1.5;
                    ballVelocity.y *= 1.5;
                }else{
                    ballVelocity.x *=-1;
                }
            }
        }

        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(BLUE);

            // Pinto Pala Derecha
            DrawRectangleRec(paladerecha, GREEN);

            // Pinto Pala Izquierda
            DrawRectangleRec(palaizquierda, GREEN);

            // Pintamos la pelota
            DrawCircleV(ball, ballSize, GREEN);

            // Texto ejemplo
            DrawText(FormatText("SCORE 1P: %d",score1p), 10, 10, 40, RED);
            DrawText(FormatText("SCORE 2P: %d",score2p), screenWidth - 300, 10, 40, RED);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}