// (C) Copyright 2015 Martin Dougiamas
//
// 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.

import { Injectable } from '@angular/core';
import { CoreLoggerProvider } from '../../../providers/logger';
import { CoreSitesProvider } from '../../../providers/sites';

/**
 * Service to handle Offline messages.
 */
@Injectable()
export class AddonMessagesOfflineProvider {

    protected logger;

    // Variables for database.
    protected MESSAGES_TABLE = 'mma_messages_offline_messages';
    protected tablesSchema = [
        {
            name: this.MESSAGES_TABLE,
            columns: [
                {
                    name: 'touserid',
                    type: 'INTEGER'
                },
                {
                    name: 'useridfrom',
                    type: 'INTEGER'
                },
                {
                    name: 'smallmessage',
                    type: 'TEXT'
                },
                {
                    name: 'timecreated',
                    type: 'INTEGER'
                },
                {
                    name: 'deviceoffline', // If message was stored because device was offline.
                    type: 'INTEGER'
                }
            ],
            primaryKeys: ['touserid', 'smallmessage', 'timecreated']
        }
    ];

    constructor(logger: CoreLoggerProvider, private sitesProvider: CoreSitesProvider) {
        this.logger = logger.getInstance('AddonMessagesOfflineProvider');
        this.sitesProvider.createTablesFromSchema(this.tablesSchema);
    }

    /**
     * Get all offline messages.
     *
     * @param  {string} [siteId] Site ID. If not defined, current site.
     * @return {Promise<any>}         Promise resolved with messages.
     */
    getAllMessages(siteId?: string): Promise<any> {
        return this.sitesProvider.getSite(siteId).then((site) => {
            return site.getDb().getAllRecords(this.MESSAGES_TABLE);
        });
    }
}