import common = require("./utils-common");
import trace = require("trace");

global.moduleMerge(common, exports);

export module layout {
    var density = -1;
    var metrics: android.util.DisplayMetrics;

    // cache the MeasureSpec constants here, to prevent extensive marshaling calls to and from Java
    // TODO: While this boosts the performance it is error-prone in case Google changes these constants
    var MODE_SHIFT = 30;
    var MODE_MASK = 0x3 << MODE_SHIFT;
    var sdkVersion = -1;
    var useOldMeasureSpec = false;

    export function makeMeasureSpec(size: number, mode: number): number {
        if (sdkVersion === -1) {
            // 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 === -1) {
            density = getDisplayMetrics().density;
        }

        return density;
    }

    function getDisplayMetrics(): android.util.DisplayMetrics {
        if (!metrics) {
            metrics = ad.getApplicationContext().getResources().getDisplayMetrics();
        }

        return metrics;
    }
}

// We are using "ad" here to avoid namespace collision with the global android object
export module ad {

    export function getApplication() { return <android.app.Application>(<any>com.tns).NativeScriptApplication.getInstance(); }
    export function getApplicationContext() { return <android.content.Context>getApplication().getApplicationContext(); }

    export module collections {
        export function stringArrayToStringSet(str: string[]): any {
            var hashSet = new java.util.HashSet();
            if ("undefined" !== typeof str) {
                for (var element in str) {
                    hashSet.add('' + str[element]);
                }
            }
            return hashSet;
        }

        export function stringSetToStringArray(stringSet: any): string[] {
            var arr = [];
            if ("undefined" !== typeof stringSet) {
                var it = stringSet.iterator();
                while (it.hasNext()) {
                    var element = '' + it.next();
                    arr.push(element);
                }
            }

            return arr;
        }
    }

    export module resources {
        var attr;
        var attrCache = new Map<string, number>();

        export function getDrawableId(name) {
            return getId(":drawable/" + name);
        }

        export function getStringId(name) {
            return getId(":string/" + name);
        }

        export function getId(name: string): number {
            var resources = getApplicationContext().getResources();
            var packageName = getApplicationContext().getPackageName();
            var uri = packageName + name;
            return resources.getIdentifier(uri, null, null);
        }

        export function getPalleteColor(name: string, context: android.content.Context): number {
            if (attrCache.has(name)) {
                return attrCache.get(name);
            }

            var result = 0;
            try {
                if (!attr) {
                    attr = java.lang.Class.forName("android.support.v7.appcompat.R$attr")
                }

                let colorID = 0;
                let field = attr.getField(name);
                if (field) {
                    colorID = field.getInt(null);
                }

                if (colorID) {
                    let typedValue = new android.util.TypedValue();
                    context.getTheme().resolveAttribute(colorID, typedValue, true);
                    result = typedValue.data;
                }
            }
            catch (ex) {
                trace.write("Cannot get pallete color: " + name, trace.categories.Error, trace.messageType.error);
            }

            attrCache.set(name, result);
            return result;
        }
    }
}

export function GC() {
    gc();
}

export function openUrl(location: string): boolean {
    var context = ad.getApplicationContext();
    try {
        var intent = new android.content.Intent(android.content.Intent.ACTION_VIEW, android.net.Uri.parse(location.trim()));
        intent.addFlags(android.content.Intent.FLAG_ACTIVITY_NEW_TASK);

        context.startActivity(intent);
    } catch (e) {
        // We Don't do anything with an error.  We just output it
        console.error("Error in OpenURL", e);
        return false;
    }
    return true;
}
