export default {

    uuid: () => {
        let S4 = () => {
            return (((1+Math.random())*0x10000)|0).toString(16).substring(1);
        }
        return (S4()+S4()+"-"+S4()+"-"+S4()+"-"+S4()+"-"+S4()+S4()+S4());
    },

    vec3UE4ToBABYLON(vec) {
        return BABYLON.Vector3.TransformCoordinates(
            new BABYLON.Vector3(vec.x, vec.y, vec.z),
            BABYLON.Matrix.FromArray([
                -0.01,  0,      0,      0,
                0,      0,      0.01,   0,
                0,      0.01,   0,      0,
                0,      0,      0,      1
            ])
        )
    },

    vec3BABYLONToUE4(vec) {
        return BABYLON.Vector3.TransformCoordinates(
            new BABYLON.Vector3(vec.x, vec.y, vec.z),
            BABYLON.Matrix.FromArray([
                -100,   0,      0,      0,
                0,      0,      100,    0,
                0,      100,    0,      0,
                0,      0,      0,      1
            ])
        )
    },
    
    postData: (url, data) => {
        return fetch(url, {
            body: JSON.stringify(data),
            // cache: 'no-cache',
            // credentials: 'same-origin',
            headers: {
                // 'user-agent': 'Mozilla/4.0 MDN Example',
                'content-type': 'application/json'
            },
            method: 'POST',
            // mode: 'cors',
            // redirect: 'follow',
            // referrer: 'no-referrer',
        })
        .then(response => response.json())
    },

    createVideoElement: (path) => {

        return new Promise((resolve, reject) => {
            
            let videoName = path.split("/")[path.split("/").length-1].split(".")[0]
            let oldVideo = document.getElementById(videoName)
            if(oldVideo) {
                oldVideo.currentTime = 0
                oldVideo.isLoaded = true
                resolve(oldVideo)
            } 
            else {
                let video = document.createElement("video")
                video.src = path
                video.id = videoName
                video.crossOrigin = "anonymous" 
                video.playsinline = "playsinline" 
                video.autoplay = "autoplay" 
                video.muted = "muted"

                // document.getElementById("videoTextureBox").appendChild(video)

                video.onloadeddata = () => {
                    resolve(video);
                }
            }
            
        });
    },
    
    createVideoElement0: (path) => {

        let videoName = path.split("/")[path.split("/").length-1].split(".")[0]
        let oldVideo = document.getElementById(videoName)
        if(oldVideo) {
            oldVideo.currentTime = 0
            oldVideo.isLoaded = true
            return oldVideo
        }

        let video = document.createElement("video")
        video.src = path
        video.id = videoName
        video.crossOrigin = "anonymous" 
        video.playsinline = "playsinline" 
        video.autoplay = "autoplay" 
        video.muted = "muted"

        document.getElementById("videoTextureBox").appendChild(video)
        
        return video
    },

    getLengthBetweenVec3: (v1, v2) => {
        return Math.sqrt(
            (v1.x - v2.x) * (v1.x - v2.x) +
            (v1.y - v2.y) * (v1.y - v2.y) +
            (v1.z - v2.z) * (v1.z - v2.z)
        )
    }

}