package cgeo.geocaching.apps;

import org.apache.commons.collections.CollectionUtils;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;

import java.util.List;

public abstract class AbstractApp implements App {

    protected String packageName;

    private String intent;
    private String name;

    protected AbstractApp(final String name, final String intent,
            final String packageName) {
        this.name = name;
        this.intent = intent;
        this.packageName = packageName;
    }

    protected AbstractApp(final String name, final String intent) {
        this(name, intent, null);
    }

    protected Intent getLaunchIntent(Context context) {
        if (packageName == null) {
            return null;
        }
        PackageManager packageManager = context.getPackageManager();
        try {
            // This can throw an exception where the exception type is only defined on API Level > 3
            // therefore surround with try-catch
            Intent intent = packageManager.getLaunchIntentForPackage(packageName);
            return intent;
        } catch (Exception e) {
            return null;
        }
    }

    public boolean isInstalled(final Context context) {
        if (getLaunchIntent(context) != null) {
            return true;
        }
        return isIntentAvailable(context, intent);
    }

    private static boolean isIntentAvailable(Context context, String action) {
        final Intent intent = new Intent(action);

        return isIntentAvailable(context, intent);
    }

    protected static boolean isIntentAvailable(Context context, Intent intent) {
        final PackageManager packageManager = context.getPackageManager();
        final List<ResolveInfo> list = packageManager.queryIntentActivities(
                intent, PackageManager.MATCH_DEFAULT_ONLY);

        return (CollectionUtils.isNotEmpty(list));
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public int getId() {
        return getName().hashCode();
    }
}