#include "menu.h"
#include <SDL2/SDL_image.h>
#include "renderer.h"
#include "scaller.h"
#include "text.h"

#define BLINK_FREQUENCY 0.00005

static RenderId_t menuObjects[10];
static unsigned menuObjectsSize = 0;

static float blinkDelta = 0;
static bool increaseTextBrightness = false;
static Uint8 textOpacity = 255;



int menu_staticRender(void){
    MonitorSize_t size = renderer_getMonitorSize();
    float aspectRatio = (float)size.width / size.height;


    SDL_Surface* backgroundImageSurface = IMG_Load("./assets/img/menu_bg.png");
    if(backgroundImageSurface == NULL){
        printf("cannot load background");
        return -1;
    }

    RenderObject_t backgroundImage;
    backgroundImage.x = 0;
    backgroundImage.y = 0;
    backgroundImage.z = 0;
    backgroundImage.surface = backgroundImageSurface;
    backgroundImage.width = 1;
    backgroundImage.height = 1;
    menuObjects[menuObjectsSize] = renderer_renderObject(backgroundImage);
    ++menuObjectsSize;
    return 0;
}

int menu_render(float delta){

    for(unsigned i = 1; i < menuObjectsSize; ++i){
        renderer_removeObject(menuObjects[i]);
    }
    menuObjectsSize = 1;

    blinkDelta += delta;

    if(increaseTextBrightness && blinkDelta >= BLINK_FREQUENCY){
        textOpacity += 1;
        if(textOpacity == 255) increaseTextBrightness = false;
        blinkDelta = 0;
    }
    else if(!increaseTextBrightness && blinkDelta >= BLINK_FREQUENCY){
        textOpacity -= 1;
        if(textOpacity == 1) increaseTextBrightness = true;
        blinkDelta = 0;
    }
    RenderObject_t startTextShadow;
    SDL_Color black = {0, 0, 0, textOpacity};
    text_renderText(&startTextShadow, 0.495f, 0.855f, 9, 1.f, black, "./assets/fonts/Quinquefive.ttf", 28, "Press space to start");
    menuObjects[menuObjectsSize] = renderer_renderObject(startTextShadow);
    ++menuObjectsSize;

    RenderObject_t startText;
    SDL_Color orange = {255,165,0, textOpacity};
    text_renderText(&startText, 0.5f, 0.85f, 10, 1.f, orange, "./assets/fonts/Quinquefive.ttf", 28, "Press space to start");
    menuObjects[menuObjectsSize] = renderer_renderObject(startText);
    ++menuObjectsSize;
    return 0;
}

void menu_remove(void){
    for(unsigned i = 0; i < menuObjectsSize; ++i){
        renderer_removeObject(menuObjects[i]);
    }
    menuObjectsSize = 0;
}