#include <iostream>
#include <memory>
#include <thread>

#include "DMM_HID.h"
#include "common.h"

using std::cout;
using std::endl;
using std::string;
using std::vector;

bool open_dmm(DMM_HID& dmm)
{
	vector<string> devs = DMM_HID::get_dmm_devices();
	vector<Reading> readings;

	if (0 == devs.size())
	{
		cout << "DMM not found" << endl;
		return false;
	}

	if (devs.size() > 1)
	{
		cout << "Multiple DMMs found" << endl;
		cout << "Using: " << devs[0] << endl;
	}

	dmm.Open(devs[0]);

	// Wait a sec
	std::this_thread::sleep_for(std::chrono::seconds(1));

	// DMM is open. Now check its config
	readings = dmm.get_readings(1);

	if (readings.empty())
	{
		cout << "DMM communication is not ON - Press and hold USB/REL key" << endl;
	}

	return true;
}

int main(int argc, char **argv)
{
	bool ok;
	bool quit = false;

	DMM_HID dmm;
	vector<Reading> readings;

	Uint32 next_draw = 0;
	Uint32 ms;

	SDL_Window *window;
	SDL_Surface *surface;
	TTF_Font *font;

	string text;

	// Keep compiler happy
	(void)argc;
	(void)argv;

	ok = open_dmm(dmm);
	if (!ok)
	{
		return -1;
	}

	ok = init_sdl(&window);
	if (!ok)
	{
		return -1;
	}

	font = TTF_OpenFont("./font.ttf", FONT_SIZE);

	while (!quit)
	{
		ms = SDL_GetTicks();
		if (next_draw - ms > 1000 / UI_FPS)
		{
			surface = SDL_GetWindowSurface(window);

			// Fill the surface white
			SDL_FillRect(surface, NULL, SDL_MapRGB(surface->format, 255, 255, 255));

			// Get Readings
			readings = dmm.get_readings();

			// Calculate Text
			calc_text(text, readings);

			// TODO: Draw Text
			draw_text(text, surface, font);

			next_draw = ms + 1000 / UI_FPS;

			// Update the window
			SDL_UpdateWindowSurface(window);

			quit = check_quit();
		}
	}

	TTF_CloseFont(font);
	quit_sdl(window);

	return 0;
}