/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settings.applications;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.UserHandle;
import android.preference.ListPreference;
import android.util.ArrayMap;
import android.util.AttributeSet;

import com.android.settings.R;

import java.util.List;

public class DefaultBrowserPreference extends ListPreference {

    final private PackageManager mPm;

    public DefaultBrowserPreference(Context context, AttributeSet attrs) {
        super(context, attrs);

        mPm = context.getPackageManager();
        loadBrowserApps();
    }

    private void loadBrowserApps() {
        ArrayMap<String, CharSequence> browsers = resolveBrowserApps();

        setEntries(browsers.values().toArray(new CharSequence[browsers.size()]));
        setEntryValues(browsers.keySet().toArray(new String[browsers.size()]));
    }

    private ArrayMap<String, CharSequence> resolveBrowserApps() {
        ArrayMap<String, CharSequence> result = new ArrayMap<>();

        // Create an Intent that will match ALL Browser Apps
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        intent.addCategory(Intent.CATEGORY_BROWSABLE);
        intent.setData(Uri.parse("http:"));

        // Resolve that intent and check that the handleAllWebDataURI boolean is set
        PackageManager packageManager = getContext().getPackageManager();
        List<ResolveInfo> list = packageManager.queryIntentActivitiesAsUser(intent, 0,
                UserHandle.myUserId());

        final int count = list.size();
        for (int i=0; i<count; i++) {
            ResolveInfo info = list.get(i);
            if (info.activityInfo == null || result.containsKey(info.activityInfo.packageName)
                    || !info.handleAllWebDataURI) {
                continue;
            }

            String packageName = info.activityInfo.packageName;
            CharSequence label = info.activityInfo.applicationInfo.loadLabel(packageManager);

            result.put(packageName, label);
        }

        return result;
    }
}