/*
 * Copyright (C) 2016 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.documentsui.testing;

import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.ProviderInfo;

import android.content.pm.ResolveInfo;
import com.android.documentsui.base.RootInfo;

import org.mockito.Mockito;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Abstract to avoid having to implement unnecessary Activity stuff.
 * Instances are created using {@link #create()}.
 */
public abstract class TestPackageManager extends PackageManager {

    public Map<String, ResolveInfo> contentProviders;
    public List<ResolveInfo> queryIntentProvidersResults = new ArrayList<>();

    public void addStubContentProviderForRoot(RootInfo... roots) {
        for (RootInfo root : roots) {
            // only one entry per authority is required.
            if (!contentProviders.containsKey(root.authority)) {
                ResolveInfo info = new ResolveInfo();
                contentProviders.put(root.authority, info);
                info.providerInfo = new ProviderInfo();
                info.providerInfo.authority = root.authority;
            }
        }
    }

    public static TestPackageManager create() {
        TestPackageManager pm = Mockito.mock(
                TestPackageManager.class, Mockito.CALLS_REAL_METHODS);
        pm.contentProviders = new HashMap<>();
        return pm;
    }

    @Override
    public List<ResolveInfo> queryIntentContentProviders(Intent intent, int flags) {
        List<ResolveInfo> result = new ArrayList<>();
        result.addAll(contentProviders.values());
        return result;
    }

    /**
     * Query's a list of fake apps that can open an application.
     */
    @Override
    public List<ResolveInfo> queryIntentActivities(Intent intent, int flags) {
        if (queryIntentProvidersResults == null) {
            return new ArrayList<>();
        } else {
            return queryIntentProvidersResults;
        }
    }

    @Override
    public ResolveInfo resolveActivity(Intent intent, int flags) {
        ResolveInfo info = new TestResolveInfo();
        info.activityInfo = new ActivityInfo();
        info.activityInfo.packageName =
                intent.getPackage() != null ? intent.getPackage() : "TestPackage";
        info.activityInfo.applicationInfo = new ApplicationInfo();
        info.activityInfo.applicationInfo.packageName = intent.getPackage();
        info.activityInfo.name = "Fake Quick Viewer";
        return info;
    }

    public final ResolveInfo resolveActivityAsUser(
            Intent intent, int flags, int userId) {
        return resolveActivity(intent, flags);
    }

    /**
     * Hacky way to use resolve info in test. resolve info return null when new'ing up a instance
     * because of an exception thrown in toString.
     */
    public static class TestResolveInfo extends ResolveInfo {

        @Override
        public String toString() {
            return "";
        }
    }
}