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

#include "settings.h"

extern float XScale, YScale;

#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_Ball_Texture;
SDL_Texture * Settings_Skins_Texture;
SDL_Texture * Return_Button_Texture;
SDL_Texture * Bar_Texture;
SDL_Texture * Scalar_Button_Texture0;
SDL_Texture * Scalar_Button_Texture1;
SDL_Texture * Circle_Texture;

SDL_Rect Settings_rect;
SDL_Rect Settings_Ball_rect;
SDL_Rect Settings_Skins_rect;
SDL_Rect Return_Button_rect;
SDL_Rect Circle_rect;

Slider BG;
Slider BS;
Slider BT;

Uint32 Mousestate;

bool Settings_IsInit = false;
bool IsLock = false;

void Settings_Initialize(SDL_Renderer * renderer, Scenery * scenery) {
    Initialize_Slider(400, 300, Scalar_width, Bar_width, Slider_height, 0, 3, &BG, 0);
    Initialize_Slider(400, 500, Scalar_width, Bar_width, Slider_height, 10, 100, &BS, scenery->ball.TargetRect.w);
    Initialize_Slider(400, 700, Scalar_width, Bar_width, Slider_height, 0, 8, &BT, scenery->ball.TextureIndex);
    // Initialize_Slider(400,300,Scalar_width,Bar_width,Slider_height,0,8,&BT,scenery->paddle.TextureIndex);
    Settings_Texture = IMG_LoadTexture(renderer, "assets/images/settings_title.png");
    Settings_rect = (SDL_Rect) {.x = 647, .y = 50, .w = 626, .h = 200 };

    Settings_Ball_rect = (SDL_Rect) {.x = 1200, .y = 700, .w = 90, .h = 90 };

    Settings_Skins_Texture = IMG_LoadTexture(renderer, "assets/images/skins_button.png");
    Settings_Skins_rect = (SDL_Rect) {.x = 50, .y = 710, .w = 315, .h = 70 };

    Return_Button_Texture = IMG_LoadTexture(renderer, "assets/images/return_button.png");
    Return_Button_rect = (SDL_Rect) {.x = 200, .y = 200, .w = 75, .h = 75 };

    Bar_Texture = IMG_LoadTexture(renderer, "assets/images/bar_texture.png");
    Scalar_Button_Texture0 = IMG_LoadTexture(renderer, "assets/images/scalar_button_unpressed.png");
    Scalar_Button_Texture1 = IMG_LoadTexture(renderer, "assets/images/scalar_button_pressed.png");

    Circle_Texture = IMG_LoadTexture(renderer, "assets/images/circle.png");
    Circle_rect =  (SDL_Rect) {.x = 1250, .y = 500, .w = 75, .h = 75 };

    Settings_IsInit = true;
} /* Settings_Initialize */

void Settings_Draw(SDL_Renderer * renderer, Scenery * scenery, int * backgroundcount) {
    double x;

    if (!(Mousestate & SDL_BUTTON(SDL_BUTTON_LEFT))) {
        IsLock = BG.IsLock = BS.IsLock = BT.IsLock = false;
    } else {
        IsLock = true;
    }
    BACKGROUND_Draw(renderer, *backgroundcount);
    Draw_Slider(renderer, &BG);
    Draw_Slider(renderer, &BS);
    Draw_Slider(renderer, &BT);
    SDL_RenderCopy(renderer, Settings_Texture, NULL, &Settings_rect);
    SDL_RenderCopy(renderer, Return_Button_Texture, NULL, &Return_Button_rect);
    SDL_RenderCopy(renderer, Settings_Skins_Texture, NULL, &Settings_Skins_rect);
    SDL_RenderCopy(renderer, Circle_Texture, NULL, &Circle_rect);
    BALL_DrawTexture(renderer, &Settings_Ball_rect, scenery->ball.TextureIndex);
    Settings_Return();
    mapping(&x, &BS);
    scenery->ball.TargetRect.w = x;
    scenery->ball.TargetRect.h = x;
    scenery->ball.Size = ((double)x / 2.0f);
    int posx = 1250, posy = 500;
    Circle_rect.x = posx - 0.5 * Circle_rect.w;
    Circle_rect.y = posy + 0.5 * (100 - Circle_rect.w);
    Circle_rect.w = x;
    Circle_rect.h = x;
    mapping(&x, &BT);
    x = round(x);
    scenery->ball.TextureIndex = x;
    mapping(&x, &BG);
    x = round(x);
    *backgroundcount = x;
} /* Settings_Draw */

void Settings_Deinitialize(){
    if (Settings_IsInit) {
        SDL_DestroyTexture(Settings_Texture);
        SDL_DestroyTexture(Settings_Ball_Texture);
        SDL_DestroyTexture(Bar_Texture);
        SDL_DestroyTexture(Return_Button_Texture);
        SDL_DestroyTexture(Settings_Skins_Texture);
        SDL_DestroyTexture(Scalar_Button_Texture0);
        SDL_DestroyTexture(Scalar_Button_Texture1);
        SDL_DestroyTexture(Circle_Texture);
        Settings_IsInit = false;
    }
}

void Draw_Slider(SDL_Renderer * renderer, Slider * beta){
    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
    SDL_RenderCopy(renderer, Bar_Texture, NULL, &beta->Bar_rect);
    int x, y;
    Mousestate = SDL_GetMouseState(&x, &y);
    x = round((float)x / XScale);
    y = round((float)y / YScale);
    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))) || beta->IsLock) {
        if (!IsLock) {
            beta->IsLock = true;
            IsLock = true;
        }
        if (beta->IsLock) {
            SDL_RenderCopy(renderer, Scalar_Button_Texture1, NULL, &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;
            } else {
                beta->Scalar_rect.x = x - (beta->Scalar_rect.w / 2);
                beta->Slider_value = x;
            }
        } else {
            SDL_RenderCopy(renderer, Scalar_Button_Texture0, NULL, &beta->Scalar_rect);
        }
    } else {
        SDL_RenderCopy(renderer, Scalar_Button_Texture0, NULL, &beta->Scalar_rect);
    }
} /* Draw_Slider */

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(){
    if (!IsLock) {
        int x, y;
        Mousestate = SDL_GetMouseState(&x, &y);
        x = round((float)x / XScale);
        y = round((float)y / YScale);
        if ((distance(x, y, 237, 237) <= 37) && (Mousestate & SDL_BUTTON(SDL_BUTTON_LEFT)))
            GAME_ChangeState(MainMenu);
    }
}