import ARKit;


//#import "CodableUtils.h"

class CodableUtils : NSObject {

    class func convertSimdFloat3ToString(vector:simd_float3) -> String {
        return String(format:"%f %f %f", vector[0], vector[1], vector[2])
    }

    class func convertSimdFloat4x4ToString(matrix:simd_float4x4) -> String {
        let ret:NSMutableString = NSMutableString(capacity:0)
        for var i:Int=0 ; i< 4 ; i++ {
            for var j:Int=0 ; j< 4 ; j++ {
                ret.appendString(String(format:"%f ", matrix.columns[i][j]))
             }
         }
        return ret
    }

    class func convertARAnchorToDictionary(anchor:ARAnchor) -> NSDictionary {
        let params:NSMutableDictionary = ["identifier": anchor.identifier.UUIDString(),
                                                               "transform": CodableUtils.convertSimdFloat4x4ToString(anchor.transform)
                                                               ].mutableCopy()
        if anchor.isMemberOfClass(ARPlaneAnchor.self) {
            let plane:ARPlaneAnchor = anchor
            params.setObject("planeAnchor", forKey:"anchorType")
            params.setObject(CodableUtils.convertSimdFloat3ToString(plane.center), forKey:"center")
            params.setObject(CodableUtils.convertSimdFloat3ToString(plane.extent), forKey:"extent")
        }
        if anchor.isMemberOfClass(ARImageAnchor.self) {
            let image:ARImageAnchor = anchor
            params.setObject("imageAnchor", forKey:"anchorType")
            params.setObject(image.referenceImage.name, forKey:"referenceImageName")
        }
        if anchor.isMemberOfClass(ARFaceAnchor.self) {
            params.setObject("faceAnchor", forKey:"anchorType")
            let faceAnchor:ARFaceAnchor = anchor
            params.setObject(CodableUtils.convertSimdFloat4x4ToString(faceAnchor.leftEyeTransform), forKey:"leftEyeTransform")
            params.setObject(CodableUtils.convertSimdFloat4x4ToString(faceAnchor.rightEyeTransform), forKey:"rightEyeTransform")
            params.setObject(faceAnchor.blendShapes, forKey:"blendShapes")
        }
        return params
    }
}