package gg

import (
	//"github.com/hajimehoshi/ebiten/v2"
)

import "surdeus.su/core/gg/mx"

func diffEm[V comparable](s1, s2 []V) []V {
    combinedSlice := append(s1, s2...)
    dm := make(map[V]int)
    for _, v := range combinedSlice {
        if _, ok := dm[v]; ok {
            // remove element later as it exist in both slice.
            dm[v] += 1
            continue
        }
        // new entry, add in map!
        dm[v] = 1
    }
    var retSlice []V
    for k, v := range dm {
        if v == 1 {
            retSlice = append(retSlice, k)
        }
    }
    return retSlice
}

// The type represents event of a
// key getting pressed down.
type KeyDown struct {
	Key
}

// The type represents event of a
// key getting pressed up.
type KeyUp struct {
	Key
}

// The type represents event of a
// mouse button being pressed down.
type MouseButtonDown struct {
	MouseButton
	Position mx.Vector
}

// The type represents event of a
// mouse button being pressed up.
type MouseButtonUp struct {
	MouseButton
	Positon mx.Vector
}

// The type represents
// event of moving the mouse.
type MouseMove struct {
	// Real and absolute deltas
	// for the mouse movement.
	RealDelta, AbsDelta mx.Vector
}

// The type represents event
// of a wheel change.
type WheelChange struct {
	Offset mx.Vector
}

type KeyboardEvents struct {
	Downs []KeyDown
	Ups []KeyUp
}

type MouseEvents struct {
	Downs []MouseButtonDown
	Ups []MouseButtonUp
	Move *MouseMove
	Wheel *WheelChange
}

type Events struct {
	Keyboard KeyboardEvents
	Mouse MouseEvents
}

type EventChan chan any