#include<stdio.h>
#include<time.h>
#include "gfx.h"
#include "main.h"
#include "gui.h"
int loop;
float sum;
butt butts;
tbuff texts;
std::string output;
int main (int argc, char * argv[]) {
	//inits program
	initgfx(400,600, "SDL calculator");
	//main loop, this is defined in main.h and global
	loop = 1;
	SDL_Texture * ttp = loadtexture("img/blue.bmp");
	sum = -1;
	//adds the gui elements
	butts.add(50,400,50,20, "reset");
	butts.add(250,400,100,20, "calculate");
	butts.add(380,0,20,20, "x");
	texts.add(50,50,300,20);
	texts.add(50,100,300,20);
	texts.add(50,150,300,20);
	texts.add(50,200,300,20);
	
	while(loop) {
		//polls events, which are in a buffer
		//returns 1 if there is event in buffer
		//returns 0 if buffer is empty
		SDL_Event event;
		while (SDL_PollEvent(&event)) {
			switch (event.type) {
				//loop is a global defined in main.h
				case SDL_QUIT:
					printf("loop = 0;\n");
					loop = 0;
				break;
				//adds to the text input manager
				case SDL_TEXTINPUT:
					//if the input buffer was empty before, 
					//make it the text, which is char[] which
					//is *char
					texts.charin( event.text.text);
					printf("text input event\n");
				break;
				//this only applies if you're typing in chinese
				case SDL_TEXTEDITING:
					printf("text editing event\n");
				break;
				//for when the moose moves
				case SDL_MOUSEMOTION:
					butts.hover(event.motion.x, event.motion.y);
					texts.hover(event.motion.x, event.motion.y);
				break;
				//left click only, double clicks cancer out so only odd
				case SDL_MOUSEBUTTONDOWN:
					if(( event.button.button == SDL_BUTTON_LEFT) && ((event.button.clicks % 2) != 0)) {
						butts.press(event.button.x, event.button.y);
						texts.press(event.button.x, event.button.y);
					}
				break; 
			}
		}
		//checks the states of the buttons and handles them accordingly
		if (butts.state(0) & TOGGLE) {
			//returns all the text buffers to ""
			texts.reset();
			//toggles the state of the button back to off
			butts.unpress(0);
		}
		//actually calculates
		if (butts.state(1) & TOGGLE) {
			sum = 0;
			//since only error is an exception
			try {
				sum += stof(texts.buffs[0]);
				sum += stof(texts.buffs[1]);
				sum += stof(texts.buffs[2]);
				sum += stof(texts.buffs[3]);
				sum = sum / 4.0;
				output = std::to_string(sum);
			//I know that sum can be -1, but NULL doesn't work well in cpp
			//and I don't want to use a second variable
			} catch (std::invalid_argument& a) {
				sum = -1;
				//untoggles buton
				output = "inputs not valid";
			}
			butts.unpress(1);
		}
		//quits the program
		if (butts.state(2) & TOGGLE) {
			loop = false;
			butts.unpress(2);
		}
		cleargfx();
		//grade score color
		SDL_Color outc;
		outc.r = 255;
		outc.g = 255;
		outc.b = 255;
		outc.a = 255;
		//the text box labesl
		drawtext(0,50,"Test1",outc);
		drawtext(0,100,"Test2",outc);
		drawtext(0,150,"Test3",outc);
		drawtext(0,200,"Test4",outc);
		//load grade image
		SDL_Surface * tsp;
		SDL_Texture * ttp;
		
		//so we don't assign a grade to NOT VALID
		if (sum != -1) {
			if (sum >= 90) {
				tsp = SDL_LoadBMP("img/A.bmp");
				drawtext(100,450,"A",outc);
			} else if( sum >= 80) {
				tsp = SDL_LoadBMP("img/B.bmp");	
				drawtext(100,450,"B",outc);
			} else if (sum >= 70){
				tsp = SDL_LoadBMP("img/C.bmp");
				drawtext(100,450,"C",outc);
			} else if (sum >= 60){
				tsp = SDL_LoadBMP("img/D.bmp");
				drawtext(100,450,"D",outc);
			} else {
				tsp = SDL_LoadBMP("img/F.bmp");
				drawtext(100,450,"F",outc);
			}
			ttp = SDL_CreateTextureFromSurface(renderp, tsp);
			drawimg(100,450,50,50,ttp);
			SDL_FreeSurface(tsp);
			SDL_DestroyTexture(ttp);
		}
		
		
		//draws the grade score
		drawtext(180,450,output.c_str(),outc);
		//draws all buttons
		butts.drawbutt();
		//draws text buffer
		texts.drawtbuff();
		//updates frame
			//since only error is an exception	
			//all the work is done here
		
		drawimg(0,0,20,20,"img/red.bmp");
		drawimg(20,20,10,10,ttp);	
		drawrect(0,20,10,10,255,255,255,50);
		updategfx();
	}
	SDL_DestroyTexture(ttp);
	quitgfx();
	return 0;
}