#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <stdbool.h>

#include "breakout.h"
#include "settings.h"

#define Slider_height 100
#define Scalar_width 20
#define Bar_width 400
#define round(x)    ((int) ((x) + .5))
#define distance(x1,y1,x2,y2)  ((int)(sqrt(pow(x2-x1,2)+pow(y2-y1,2))))

SDL_Texture* Settings_Texture;
SDL_Texture* Settings_Return_Button_Texture;

SDL_Rect Settings_rect;
SDL_Rect Settings_Return_Button_rect;
Slider BV;
Slider BS;
Slider BT;
Uint32 Mousestate;
bool Settings_IsInit=false;

void Settings_Initialize (SDL_Renderer* renderer,Scenery* scenery) {
  Initialize_Slider(400,300,Scalar_width,Bar_width,Slider_height,1,2,&BV,1.5);
  Initialize_Slider(400,500,Scalar_width,Bar_width,Slider_height,30,100,&BS,scenery->ball.TargetRect.w);
  Initialize_Slider(400,700,Scalar_width,Bar_width,Slider_height,0,8,&BT,scenery->ball.TextureIndex);
  Settings_Texture = IMG_LoadTexture(renderer, "assets/images/settings_title.png");
  Settings_rect = (SDL_Rect){.x = 800, .y = 180, .w=313, .h=100};
  Settings_Return_Button_Texture = IMG_LoadTexture(renderer, "assets/images/return_button.png");
  Settings_Return_Button_rect = (SDL_Rect){.x = 200, .y = 200, .w=75, .h=75};
  Settings_IsInit = true;
}

void Settings_Draw (SDL_Renderer* renderer,Scenery* scenery) {
  double x;
  scenery->ball.TargetRect.x=900;
  scenery->ball.TargetRect.y=700;
  SDL_RenderCopy(renderer, Settings_Texture, NULL, &Settings_rect);
  SDL_RenderCopy(renderer, Settings_Return_Button_Texture, NULL, &Settings_Return_Button_rect);
  Draw_Slider(renderer,&BV);
  Draw_Slider(renderer,&BS);
  Draw_Slider(renderer,&BT);
  Draw_Ballstate(renderer,scenery);
  mapping(&x,&BT);
  scenery->ball.TextureIndex=round(x);
  mapping(&x,&BS);
  scenery->ball.TargetRect.w=x;
  scenery->ball.TargetRect.h=x;
  Settings_Return();
}

void Settings_Deinitialize(){
    if (Settings_IsInit) {
        SDL_DestroyTexture(Settings_Texture);
        SDL_DestroyTexture(Settings_Ball_Texture);
        Settings_IsInit = false;
    }
}

void Draw_Slider(SDL_Renderer* renderer,Slider* beta){
  SDL_SetRenderDrawColor(renderer,255,255,255,255);
  SDL_RenderDrawRect(renderer,&beta->Bar_rect);
  int x,y;
  Mousestate=SDL_GetMouseState(&x,&y);
  if(y<=((beta->Bar_rect.y)+(beta->Bar_rect.h))&&y>=(beta->Bar_rect.y)&&x<=(beta->Bar_rect.w+beta->Bar_rect.x)&&x>=(beta->Bar_rect.x)&&(Mousestate & SDL_BUTTON(SDL_BUTTON_LEFT))){
    SDL_RenderFillRect(renderer,&beta->Scalar_rect);
    SDL_RenderDrawRect(renderer,&beta->Scalar_rect);
    if(x>(beta->Bar_rect.x+beta->Bar_rect.w-(beta->Scalar_rect.w)/2)){
      beta->Scalar_rect.x=(beta->Bar_rect.x+beta->Bar_rect.w-(beta->Scalar_rect.w));
      beta->Slider_value=(beta->Bar_rect.x+beta->Bar_rect.w-(beta->Scalar_rect.w)/2);
    }
    else if(x<beta->Bar_rect.x+(beta->Scalar_rect.w)/2){
      beta->Scalar_rect.x=beta->Bar_rect.x;
      beta->Slider_value=beta->Bar_rect.x+(beta->Scalar_rect.w)/2;
    }
} /* Draw_Slider */

void Draw_Ballstate(SDL_Renderer * renderer, Scenery * scenery){
    BALL_Draw(renderer, &(scenery->ball));
}

void mapping(double * x, Slider * beta){
    *x = ((beta->max - beta->min) / (beta->Bar_rect.w - (beta->Scalar_rect.w))) * (beta->Slider_value - beta->Bar_rect.x - beta->Scalar_rect.w / 2) + beta->min;
}

void Initialize_Slider(int x,int y,int sw,int bw,int h,double min,double max,Slider* beta,double defaultvalue){
  beta->Scalar_rect = (SDL_Rect){.x=(defaultvalue-min)/(max-min)*(bw-sw/2)+x,.y=y,.w=sw,.h=h};
  beta->Bar_rect =  (SDL_Rect){.x=x,.y=y,.w=bw,.h=h};
  beta->max=max;
  beta->min=min;
  beta->Slider_value=(defaultvalue-min)/(max-min)*(bw-sw/2)+x;
}

void Settings_Return(Scenery* scenery){
  int x,y;
  Mousestate=SDL_GetMouseState(&x,&y);
  if((distance(x,y,237,237)<=37)&&(Mousestate & SDL_BUTTON(SDL_BUTTON_LEFT)))
  GAME_ChangeState(MainMenu);
}