import { MODE_MASK } from "./layout-helper-common";
import { ad } from "../native-helper";

export * from "./layout-helper-common";

let density: number;

let sdkVersion: number;
let useOldMeasureSpec = false;

export function makeMeasureSpec(size: number, mode: number): number {
    if (sdkVersion === undefined) {
        // check whether the old layout is needed
        sdkVersion = ad.getApplicationContext().getApplicationInfo().targetSdkVersion;
        useOldMeasureSpec = sdkVersion <= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1;
    }

    if (useOldMeasureSpec) {
        return size + mode;
    }

    return (size & ~MODE_MASK) | (mode & MODE_MASK);
}

export function getDisplayDensity(): number {
    if (density === undefined) {
        density = ad.getResources().getDisplayMetrics().density;
    }

    return density;
}

export function toDevicePixels(value: number): number {
    return value * getDisplayDensity();
}

export function toDeviceIndependentPixels(value: number): number {
    return value / getDisplayDensity();
}

export function measureNativeView(nativeView: any /* android.view.View */, width: number, widthMode: number, height: number, heightMode: number): { width: number, height: number } {
    const view = <android.view.View>nativeView;
    view.measure(makeMeasureSpec(width, widthMode), makeMeasureSpec(height, heightMode));

    return {
        width: view.getMeasuredWidth(),
        height: view.getMeasuredHeight()
    };
}