// (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 { CoreContentLinksHandlerBase } from '@core/contentlinks/classes/base-handler';
import { CoreContentLinksAction } from '@core/contentlinks/providers/delegate';
import { CoreContentLinksHelperProvider } from '@core/contentlinks/providers/helper';
import { AddonMessagesProvider } from './messages';

/**
 * Content links handler for messaging index.
 * Match message index URL without params id, user1 or user2.
 */
@Injectable()
export class AddonMessagesIndexLinkHandler extends CoreContentLinksHandlerBase {
    name = 'AddonMessagesIndexLinkHandler';
    pattern = /\/message\/index\.php((?![\?\&](id|user1|user2)=\d+).)*$/;

    constructor(private linkHelper: CoreContentLinksHelperProvider, private messagesProvider: AddonMessagesProvider) {
        super();
    }

    /**
     * Get the list of actions for a link (url).
     *
     * @param {string[]} siteIds List of sites the URL belongs to.
     * @param {string} url The URL to treat.
     * @param {any} params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
     * @param {number} [courseId] Course ID related to the URL. Optional but recommended.
     * @return {CoreContentLinksAction[]|Promise<CoreContentLinksAction[]>} List of (or promise resolved with list of) actions.
     */
    getActions(siteIds: string[], url: string, params: any, courseId?: number):
            CoreContentLinksAction[] | Promise<CoreContentLinksAction[]> {
        return [{
            action: (siteId, navCtrl?): void => {
                let pageName = 'AddonMessagesIndexPage';
                if (this.messagesProvider.isGroupMessagingEnabled()) {
                    pageName = 'AddonMessagesGroupConversationsPage';
                }

                // Always use redirect to make it the new history root (to avoid "loops" in history).
                this.linkHelper.goInSite(navCtrl, pageName, undefined, siteId);
            }
        }];
    }

    /**
     * Check if the handler is enabled for a certain site (site + user) and a URL.
     * If not defined, defaults to true.
     *
     * @param {string} siteId The site ID.
     * @param {string} url The URL to treat.
     * @param {any} params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
     * @param {number} [courseId] Course ID related to the URL. Optional but recommended.
     * @return {boolean|Promise<boolean>} Whether the handler is enabled for the URL and site.
     */
    isEnabled(siteId: string, url: string, params: any, courseId?: number): boolean | Promise<boolean> {
        return this.messagesProvider.isPluginEnabled(siteId);
    }
}