/*
 * Copyright (C) 2018 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.accounts;

import android.accounts.Account;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.widget.ImageView;

import androidx.annotation.VisibleForTesting;
import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.LifecycleObserver;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.OnLifecycleEvent;

import com.android.settings.R;
import com.android.settings.homepage.SettingsHomepageActivity;
import com.android.settings.overlay.FeatureFactory;
import com.android.settingslib.utils.ThreadUtils;

import java.util.List;

/**
 * Avatar related work to the onStart method of registered observable classes
 * in {@link SettingsHomepageActivity}.
 */
public class AvatarViewMixin implements LifecycleObserver {
    private static final String TAG = "AvatarViewMixin";

    @VisibleForTesting
    static final Intent INTENT_GET_ACCOUNT_DATA =
            new Intent("android.content.action.SETTINGS_ACCOUNT_DATA");

    private static final String METHOD_GET_ACCOUNT_AVATAR = "getAccountAvatar";
    private static final String KEY_AVATAR_BITMAP = "account_avatar";
    private static final int REQUEST_CODE = 1013;

    private final Context mContext;
    private final ImageView mAvatarView;
    private final MutableLiveData<Bitmap> mAvatarImage;

    public AvatarViewMixin(SettingsHomepageActivity activity, ImageView avatarView) {
        mContext = activity.getApplicationContext();
        mAvatarView = avatarView;
        mAvatarView.setOnClickListener(v -> {
            if (hasAccount()) {
                //TODO(b/117509285) launch the new page of the MeCard
            } else {
                final Intent intent = FeatureFactory.getFactory(mContext)
                        .getAccountFeatureProvider()
                        .getAccountSettingsDeeplinkIntent();

                if (intent != null) {
                    activity.startActivityForResult(intent, REQUEST_CODE);
                }
            }
        });

        mAvatarImage = new MutableLiveData<>();
        mAvatarImage.observe(activity, bitmap -> {
            avatarView.setImageBitmap(bitmap);
        });
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_START)
    public void onStart() {
        if (!mContext.getResources().getBoolean(R.bool.config_show_avatar_in_homepage)) {
            Log.d(TAG, "Feature disabled. Skipping");
            return;
        }
        if (hasAccount()) {
            loadAvatar();
        } else {
            mAvatarView.setImageResource(R.drawable.ic_account_circle_24dp);
        }
    }

    @VisibleForTesting
    boolean hasAccount() {
        final Account accounts[] = FeatureFactory.getFactory(
                mContext).getAccountFeatureProvider().getAccounts(mContext);
        return (accounts != null) && (accounts.length > 0);
    }

    private void loadAvatar() {
        final String authority = queryProviderAuthority();
        if (TextUtils.isEmpty(authority)) {
            return;
        }

        ThreadUtils.postOnBackgroundThread(() -> {
            final Uri uri = new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
                    .authority(authority)
                    .build();
            final Bundle bundle = mContext.getContentResolver().call(uri,
                    METHOD_GET_ACCOUNT_AVATAR, null /* arg */, null /* extras */);
            final Bitmap bitmap = bundle.getParcelable(KEY_AVATAR_BITMAP);
            mAvatarImage.postValue(bitmap);
        });
    }

    @VisibleForTesting
    String queryProviderAuthority() {
        final List<ResolveInfo> providers =
                mContext.getPackageManager().queryIntentContentProviders(INTENT_GET_ACCOUNT_DATA,
                        PackageManager.MATCH_SYSTEM_ONLY);
        if (providers.size() == 1) {
            return providers.get(0).providerInfo.authority;
        } else {
            Log.w(TAG, "The size of the provider is " + providers.size());
            return null;
        }
    }
}