/*
 * Copyright (C) 2010 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.contacts.common.list;

import android.content.ContentUris;
import android.content.Context;
import android.content.CursorLoader;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.net.Uri.Builder;
import android.preference.PreferenceManager;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.Data;
import android.provider.ContactsContract.Directory;
import android.provider.ContactsContract.SearchSnippets;
import android.text.TextUtils;
import android.view.View;

import com.android.contacts.common.Experiments;
import com.android.contacts.common.compat.ContactsCompat;
import com.android.contacts.common.model.account.AccountWithDataSet;
import com.android.contacts.common.preference.ContactsPreferences;
import com.android.contactsbind.experiments.Flags;

import java.util.ArrayList;
import java.util.List;

/**
 * A cursor adapter for the {@link ContactsContract.Contacts#CONTENT_TYPE} content type.
 */
public class DefaultContactListAdapter extends ContactListAdapter {

    public static final char SNIPPET_START_MATCH = '[';
    public static final char SNIPPET_END_MATCH = ']';

    // Contacts contacted within the last 3 days (in seconds)
    private static final long LAST_TIME_USED_3_DAYS_SEC = 3L * 24 * 60 * 60;

    // Contacts contacted within the last 7 days (in seconds)
    private static final long LAST_TIME_USED_7_DAYS_SEC = 7L * 24 * 60 * 60;

    // Contacts contacted within the last 14 days (in seconds)
    private static final long LAST_TIME_USED_14_DAYS_SEC = 14L * 24 * 60 * 60;

    // Contacts contacted within the last 30 days (in seconds)
    private static final long LAST_TIME_USED_30_DAYS_SEC = 30L * 24 * 60 * 60;

    private static final String TIME_SINCE_LAST_USED_SEC =
            "(strftime('%s', 'now') - " + Contacts.LAST_TIME_CONTACTED + "/1000)";

    private static final String STREQUENT_SORT =
            "(CASE WHEN " + TIME_SINCE_LAST_USED_SEC + " < " + LAST_TIME_USED_3_DAYS_SEC +
                    " THEN 0 " +
                    " WHEN " + TIME_SINCE_LAST_USED_SEC + " < " + LAST_TIME_USED_7_DAYS_SEC +
                    " THEN 1 " +
                    " WHEN " + TIME_SINCE_LAST_USED_SEC + " < " + LAST_TIME_USED_14_DAYS_SEC +
                    " THEN 2 " +
                    " WHEN " + TIME_SINCE_LAST_USED_SEC + " < " + LAST_TIME_USED_30_DAYS_SEC +
                    " THEN 3 " +
                    " ELSE 4 END), " +
                    Contacts.TIMES_CONTACTED + " DESC, " +
                    Contacts.STARRED + " DESC";

    public DefaultContactListAdapter(Context context) {
        super(context);
    }

    @Override
    public void configureLoader(CursorLoader loader, long directoryId) {
        if (loader instanceof FavoritesAndContactsLoader) {
            ((FavoritesAndContactsLoader) loader).setLoadFavorites(shouldIncludeFavorites());
        }

        String sortOrder = null;
        if (isSearchMode()) {
            String query = getQueryString();
            if (query == null) query = "";
            query = query.trim();
            if (TextUtils.isEmpty(query)) {
                // Regardless of the directory, we don't want anything returned,
                // so let's just send a "nothing" query to the local directory.
                loader.setUri(Contacts.CONTENT_URI);
                loader.setProjection(getProjection(false));
                loader.setSelection("0");
            } else if (isGroupMembersFilter()) {
                final ContactListFilter filter = getFilter();
                configureUri(loader, directoryId, filter);
                // TODO: This is not the normal type to filter URI so we load the non-search
                // projection. Consider creating a specific group member adapter to make it more
                // clear.
                loader.setProjection(getProjection(/* forSearch */ false));
                loader.setSelection(
                        Contacts.DISPLAY_NAME_PRIMARY + " LIKE ?1 OR " +
                        Contacts.DISPLAY_NAME_ALTERNATIVE + " LIKE ?1");
                final String[] args = new String[1];
                args[0] = query + "%";
                loader.setSelectionArgs(args);
            } else {
                final Builder builder = ContactsCompat.getContentUri().buildUpon();
                appendSearchParameters(builder, query, directoryId);
                loader.setUri(builder.build());
                loader.setProjection(getProjection(true));
                sortOrder = STREQUENT_SORT;
            }
        } else {
            final ContactListFilter filter = getFilter();
            configureUri(loader, directoryId, filter);
            if (filter != null
                    && filter.filterType == ContactListFilter.FILTER_TYPE_DEVICE_CONTACTS) {
                loader.setProjection(getDataProjectionForContacts(false));
            } else {
                loader.setProjection(getProjection(false));
            }
            configureSelection(loader, directoryId, filter);
        }

        if (getSortOrder() == ContactsPreferences.SORT_ORDER_PRIMARY) {
            if (sortOrder == null) {
                sortOrder = Contacts.SORT_KEY_PRIMARY;
            } else {
                sortOrder += ", " + Contacts.SORT_KEY_PRIMARY;
            }
        } else {
            if (sortOrder == null) {
                sortOrder = Contacts.SORT_KEY_ALTERNATIVE;
            } else {
                sortOrder += ", " + Contacts.SORT_KEY_ALTERNATIVE;
            }
        }
        loader.setSortOrder(sortOrder);
    }

    private boolean isGroupMembersFilter() {
        final ContactListFilter filter = getFilter();
        return filter != null && filter.filterType == ContactListFilter.FILTER_TYPE_GROUP_MEMBERS;
    }

    private void appendSearchParameters(Builder builder, String query, long directoryId) {
        builder.appendPath(query); // Builder will encode the query
        builder.appendQueryParameter(ContactsContract.DIRECTORY_PARAM_KEY,
                String.valueOf(directoryId));
        if (directoryId != Directory.DEFAULT && directoryId != Directory.LOCAL_INVISIBLE) {
            builder.appendQueryParameter(ContactsContract.LIMIT_PARAM_KEY,
                    String.valueOf(getDirectoryResultLimit(getDirectoryById(directoryId))));
        }
        builder.appendQueryParameter(SearchSnippets.DEFERRED_SNIPPETING_KEY, "1");
    }

    protected void configureUri(CursorLoader loader, long directoryId, ContactListFilter filter) {
        Uri uri = Contacts.CONTENT_URI;
        if (filter != null) {
            if (filter.filterType == ContactListFilter.FILTER_TYPE_SINGLE_CONTACT) {
                String lookupKey = getSelectedContactLookupKey();
                if (lookupKey != null) {
                    uri = Uri.withAppendedPath(Contacts.CONTENT_LOOKUP_URI, lookupKey);
                } else {
                    uri = ContentUris.withAppendedId(Contacts.CONTENT_URI, getSelectedContactId());
                }
            } else if (filter.filterType == ContactListFilter.FILTER_TYPE_DEVICE_CONTACTS) {
                uri = Data.CONTENT_URI;
            }
        }

        if (directoryId == Directory.DEFAULT && isSectionHeaderDisplayEnabled()) {
            uri = ContactListAdapter.buildSectionIndexerUri(uri);
        }

        // The "All accounts" filter is the same as the entire contents of Directory.DEFAULT
        if (filter != null
                && filter.filterType != ContactListFilter.FILTER_TYPE_CUSTOM
                && filter.filterType != ContactListFilter.FILTER_TYPE_SINGLE_CONTACT) {
            final Uri.Builder builder = uri.buildUpon();
            builder.appendQueryParameter(
                    ContactsContract.DIRECTORY_PARAM_KEY, String.valueOf(Directory.DEFAULT));
            if (filter.filterType == ContactListFilter.FILTER_TYPE_ACCOUNT
                || filter.filterType == ContactListFilter.FILTER_TYPE_GROUP_MEMBERS) {
                filter.addAccountQueryParameterToUrl(builder);
            }
            uri = builder.build();
        }

        loader.setUri(uri);
    }

    private void configureSelection(
            CursorLoader loader, long directoryId, ContactListFilter filter) {
        if (filter == null) {
            return;
        }

        if (directoryId != Directory.DEFAULT) {
            return;
        }

        StringBuilder selection = new StringBuilder();
        List<String> selectionArgs = new ArrayList<String>();

        switch (filter.filterType) {
            case ContactListFilter.FILTER_TYPE_ALL_ACCOUNTS: {
                // We have already added directory=0 to the URI, which takes care of this
                // filter
                break;
            }
            case ContactListFilter.FILTER_TYPE_SINGLE_CONTACT: {
                // We have already added the lookup key to the URI, which takes care of this
                // filter
                break;
            }
            case ContactListFilter.FILTER_TYPE_STARRED: {
                selection.append(Contacts.STARRED + "!=0");
                break;
            }
            case ContactListFilter.FILTER_TYPE_WITH_PHONE_NUMBERS_ONLY: {
                selection.append(Contacts.HAS_PHONE_NUMBER + "=1");
                break;
            }
            case ContactListFilter.FILTER_TYPE_CUSTOM: {
                selection.append(Contacts.IN_VISIBLE_GROUP + "=1");
                if (isCustomFilterForPhoneNumbersOnly()) {
                    selection.append(" AND " + Contacts.HAS_PHONE_NUMBER + "=1");
                }
                break;
            }
            case ContactListFilter.FILTER_TYPE_ACCOUNT: {
                // We use query parameters for account filter, so no selection to add here.
                break;
            }
            case ContactListFilter.FILTER_TYPE_GROUP_MEMBERS: {
                break;
            }
            case ContactListFilter.FILTER_TYPE_DEVICE_CONTACTS: {
                if (filter.accountType != null) {
                    selection.append(ContactsContract.RawContacts.ACCOUNT_TYPE)
                            .append("=?");
                    selectionArgs.add(filter.accountType);
                    if (filter.accountName != null) {
                        selection.append(" AND ").append(ContactsContract.RawContacts.ACCOUNT_NAME)
                                .append(("=?"));
                        selectionArgs.add(filter.accountName);
                    }
                } else {
                    selection.append(AccountWithDataSet.LOCAL_ACCOUNT_SELECTION);
                }
                break;
            }
        }
        loader.setSelection(selection.toString());
        loader.setSelectionArgs(selectionArgs.toArray(new String[0]));
    }

    @Override
    protected void bindView(View itemView, int partition, Cursor cursor, int position) {
        super.bindView(itemView, partition, cursor, position);
        final ContactListItemView view = (ContactListItemView)itemView;

        view.setHighlightedPrefix(isSearchMode() ? getUpperCaseQueryString() : null);

        if (isSelectionVisible()) {
            view.setActivated(isSelectedContact(partition, cursor));
        }

        bindSectionHeaderAndDivider(view, position, cursor);

        if (isQuickContactEnabled()) {
            bindQuickContact(view, partition, cursor, ContactQuery.CONTACT_PHOTO_ID,
                    ContactQuery.CONTACT_PHOTO_URI, ContactQuery.CONTACT_ID,
                    ContactQuery.CONTACT_LOOKUP_KEY, ContactQuery.CONTACT_DISPLAY_NAME);
        } else {
            if (getDisplayPhotos()) {
                bindPhoto(view, partition, cursor);
            }
        }

        bindNameAndViewId(view, cursor);
        bindPresenceAndStatusMessage(view, cursor);

        if (isSearchMode()) {
            bindSearchSnippet(view, cursor);
        } else {
            view.setSnippet(null);
        }
    }

    private boolean isCustomFilterForPhoneNumbersOnly() {
        // TODO: this flag should not be stored in shared prefs.  It needs to be in the db.
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
        return prefs.getBoolean(ContactsPreferences.PREF_DISPLAY_ONLY_PHONES,
                ContactsPreferences.PREF_DISPLAY_ONLY_PHONES_DEFAULT);
    }
}