/*
 * Ruler.cpp
 *
 *  Created on: May 8, 2018
 *      Author: yunya
 */

#include "Ruler.h"
#include <sstream>

Ruler::Ruler(UI *ui, int *lastKey) {
	Ruler::ui = ui;
	Ruler::lastKey = lastKey;
	focalLength = estimateFocalLength();
}

void Ruler::update(cv::Rect rect) {
	focalLength = estimateFocalLength();
	distance = estimateDistance(rect);
	inputUpdate();
	updateUI();
}

float Ruler::estimateFocalLength(int HFOV) {
	return (ui->getWidth()/2.0)*(1/(std::tan(HFOV/2.0)));
}

void Ruler::updateUI() {
	if (inputtingVal) {
		cv::putText(*(ui->drawnFrame()), ("Given width: " << widthInCM), confTextPos, cv::FONT_HERSHEY_DUPLEX, 0.7, textFontColor + 50);
	} else {
		cv::putText(*(ui->drawnFrame()), ("Given width: " << widthInCM), confTextPos, cv::FONT_HERSHEY_DUPLEX, 0.7, textFontColor);
	}
	cv::putText(*(ui->drawnFrame()), ("distance: " << distance << "cm"), distanceTextPos, cv::FONT_HERSHEY_DUPLEX, 0.7, textFontColor);

}

void Ruler::toggleInput() {
	inputtingVal = !inputtingVal;
	if (!inputtingVal) {
		numBuild.clear();
	}
}

int Ruler::estimateDistance(cv::Rect rect) {
	return (widthInCM*focalLength) / rect.width;
}

void Ruler::inputUpdate() {
	if (*lastKey == 13) {
		toggleInput();
	}
	if (inputtingVal) {
		if (*lastKey >= 48 && *lastKey <= 57) {
			char val = '0' + (*lastKey - 48);
			numBuild.push_back(val);
		}
		std::string numString{numBuild.begin(), numBuild.end()};
		numString >> widthInCM;
	}
}

void Ruler::componentSetup() {

}

Ruler::~Ruler() {
	// TODO Auto-generated destructor stub
}