//
//  AniFastSwipeGestureRecognizer.cpp
//  SteveMaggieCpp
//
//  Created by Katarzyna Kalinowska-Górska on 19.05.2017.
//
//

#include <stdio.h>
#include "AniFastSwipeGestureRecognizer.h"
#include "AniMathUtils.h"
#include "AniScalingUtils.h"

/*Detect fast swipe with the finger in one of the four basic directions */

AniFastSwipeGestureRecognizer::AniFastSwipeGestureRecognizer() : AniGestureRecognizer({cocos2d::EventListener::Type::TOUCH_ONE_BY_ONE})
{
    _onFastSwipeDetected = [](AniGestureRecognizerDirection directionX, AniGestureRecognizerDirection directionY, cocos2d::Point startLocation, cocos2d::Point endLocation, float speedX, float speedY){
//        cocos2d::log("AniFastSwipeGestureRecognizer: onFastSwipeDetected with direction "+direction);
    };
}

void AniFastSwipeGestureRecognizer::setOnFastSwipeDetectedCallback(std::function<void(AniGestureRecognizerDirection directionX, AniGestureRecognizerDirection directionY, cocos2d::Point startLocation, cocos2d::Point endLocation, float speedX, float speedY)> callback)
{
    _onFastSwipeDetected = callback;
}

AniFastSwipeGestureRecognizer::~AniFastSwipeGestureRecognizer(){
}

///////////////////////////////////////////////////////////////////////////
// internal
///////////////////////////////////////////////////////////////////////////
    
// touch handlers

bool AniFastSwipeGestureRecognizer::onTouchBegan(cocos2d::Touch* touch, cocos2d::Event* event)
{
    _startTime = cocos2d::utils::getTimeInMilliseconds()/1000.0;
    _startLocation = touch->getLocation();
    return true;
}
    
void AniFastSwipeGestureRecognizer::onTouchEnded(cocos2d::Touch* touch, cocos2d::Event* event)
{
    auto currentTime = cocos2d::utils::getTimeInMilliseconds()/1000.0;
    auto timeDiff = (currentTime - _startTime);
    auto newLocation = touch->getLocation();
    
    auto dX = newLocation.x - _startLocation.x;
    auto dY = newLocation.y - _startLocation.y;
    
    auto minDelta = m_minBaseDeltaToActivate*AniScalingUtils::scaleAspectFitToDesignIpadProSize();
    
    if(std::abs(dX) < minDelta && std::abs(dY) < minDelta){
//        cocos2d::log("returning because dx = %f, dy = %f vs minD = %f\n", dX, dY, minDelta);
        return;
    }
    
    auto xVel = dX / timeDiff;
    auto yVel = dY / timeDiff;
    
    auto absXSpeed = std::abs(xVel);
    auto absYSpeed = std::abs(yVel);
    
    if(absXSpeed >= m_minBaseSwipeSpeedToActivate*AniScalingUtils::scaleAspectFitToDesignIpadProSize() || absYSpeed >= m_minBaseSwipeSpeedToActivate*AniScalingUtils::scaleAspectFitToDesignIpadProSize()){
    
        auto directionX = AniGestureRecognizerDirection::NONE;
        auto directionY = AniGestureRecognizerDirection::NONE;
        
        auto minSwipeSpeedForDirection = m_min_swipe_speed*AniScalingUtils::scaleAspectFitToDesignIpadProSize();
        if(absXSpeed >= minSwipeSpeedForDirection){
            directionX = AniMathUtils::signum(xVel) < 0 ? AniGestureRecognizerDirection::LEFT : AniGestureRecognizerDirection::RIGHT;
        }
        if(absYSpeed >= minSwipeSpeedForDirection){
            directionY = AniMathUtils::signum(yVel) < 0 ? AniGestureRecognizerDirection::DOWN : AniGestureRecognizerDirection::UP;
        }
        _onFastSwipeDetected(directionX, directionY, _startLocation, newLocation, absXSpeed, absYSpeed);
    }
}