// (C) Copyright 2015 Moodle Pty Ltd.
//
// 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 { Component, OnDestroy, OnInit } from '@angular/core';
import { CoreDomUtils } from '@services/utils/dom';
import { AddonCompetencyDataForPlanPageCompetency, AddonCompetencyDataForPlanPageWSResponse } from '../../services/competency';
import { CoreNavigator } from '@services/navigator';
import { CoreUserProfile } from '@features/user/services/user';
import { IonRefresher } from '@ionic/angular';
import { CoreSwipeNavigationItemsManager } from '@classes/items-management/swipe-navigation-items-manager';
import { CoreRoutedItemsManagerSourcesTracker } from '@classes/items-management/routed-items-manager-sources-tracker';
import { AddonCompetencyPlansSource } from '@addons/competency/classes/competency-plans-source';
import { CoreListItemsManager } from '@classes/items-management/list-items-manager';
import { AddonCompetencyPlanCompetenciesSource } from '@addons/competency/classes/competency-plan-competencies-source';

/**
 * Page that displays a learning plan.
 */
@Component({
    selector: 'page-addon-competency-plan',
    templateUrl: 'plan.html',
})
export class AddonCompetencyPlanPage implements OnInit, OnDestroy {

    plans!: CoreSwipeNavigationItemsManager;
    competencies!: CoreListItemsManager<AddonCompetencyDataForPlanPageCompetency, AddonCompetencyPlanCompetenciesSource>;

    constructor() {
        try {
            const planId = CoreNavigator.getRequiredRouteNumberParam('planId');
            const userId = CoreNavigator.getRouteNumberParam('userId');
            const plansSource = CoreRoutedItemsManagerSourcesTracker.getOrCreateSource(
                AddonCompetencyPlansSource,
                [userId],
            );
            const competenciesSource = CoreRoutedItemsManagerSourcesTracker.getOrCreateSource(
                AddonCompetencyPlanCompetenciesSource,
                [planId],
            );

            this.competencies = new CoreListItemsManager(competenciesSource, AddonCompetencyPlanPage);
            this.plans = new CoreSwipeNavigationItemsManager(plansSource);
        } catch (error) {
            CoreDomUtils.showErrorModal(error);

            CoreNavigator.back();

            return;
        }
    }

    get plan(): AddonCompetencyDataForPlanPageWSResponse | undefined {
        return this.competencies.getSource().plan;
    }

    get user(): CoreUserProfile | undefined {
        return this.competencies.getSource().user;
    }

    /**
     * @inheritdoc
     */
    async ngOnInit(): Promise<void> {
        await this.fetchLearningPlan();
        await this.plans.start();
        await this.competencies.start();
    }

    /**
     * @inheritdoc
     */
    ngOnDestroy(): void {
        this.plans.destroy();
        this.competencies.destroy();
    }

    /**
     * Fetches the learning plan and updates the view.
     *
     * @return Promise resolved when done.
     */
    protected async fetchLearningPlan(): Promise<void> {
        try {
            await this.competencies.getSource().reload();
        } catch (error) {
            CoreDomUtils.showErrorModalDefault(error, 'Error getting learning plan data.');
        }
    }

    /**
     * Refreshes the learning plan.
     *
     * @param refresher Refresher.
     */
    async refreshLearningPlan(refresher: IonRefresher): Promise<void> {
        await this.competencies.getSource().invalidateCache();

        this.fetchLearningPlan().finally(() => {
            refresher?.complete();
        });
    }

}