/*****************************************************************************
 * Open MCT, Copyright (c) 2014-2022, United States Government
 * as represented by the Administrator of the National Aeronautics and Space
 * Administration. All rights reserved.
 *
 * Open MCT is 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.
 *
 * Open MCT includes source code licensed under additional open source
 * licenses. See the Open Source Licenses file (LICENSES.md) included with
 * this source code distribution or the Licensing information page available
 * at runtime from the About dialog for additional information.
 *****************************************************************************/

import EventEmitter from 'EventEmitter';
import { v4 as uuid } from 'uuid';
import createExampleUser from './exampleUserCreator';

const STATUSES = [{
    key: "NO_STATUS",
    label: "Not set",
    iconClass: "icon-question-mark",
    iconClassPoll: "icon-status-poll-question-mark"
}, {
    key: "GO",
    label: "Go",
    iconClass: "icon-check",
    iconClassPoll: "icon-status-poll-question-mark",
    statusClass: "s-status-ok",
    statusBgColor: "#33cc33",
    statusFgColor: "#000"
}, {
    key: "MAYBE",
    label: "Maybe",
    iconClass: "icon-alert-triangle",
    iconClassPoll: "icon-status-poll-question-mark",
    statusClass: "s-status-warning",
    statusBgColor: "#ffb66c",
    statusFgColor: "#000"
}, {
    key: "NO_GO",
    label: "No go",
    iconClass: "icon-circle-slash",
    iconClassPoll: "icon-status-poll-question-mark",
    statusClass: "s-status-error",
    statusBgColor: "#9900cc",
    statusFgColor: "#fff"
}];
/**
 * @implements {StatusUserProvider}
 */
export default class ExampleUserProvider extends EventEmitter {
    constructor(openmct, {defaultStatusRole} = {defaultStatusRole: undefined}) {
        super();

        this.openmct = openmct;
        this.user = undefined;
        this.loggedIn = false;
        this.autoLoginUser = undefined;
        this.status = STATUSES[0];
        this.pollQuestion = undefined;
        this.defaultStatusRole = defaultStatusRole;

        this.ExampleUser = createExampleUser(this.openmct.user.User);
        this.loginPromise = undefined;
    }

    isLoggedIn() {
        return this.loggedIn;
    }

    autoLogin(username) {
        this.autoLoginUser = username;
    }

    getCurrentUser() {
        if (!this.loginPromise) {
            this.loginPromise = this._login().then(() => this.user);
        }

        return this.loginPromise;
    }

    canProvideStatusForRole() {
        return Promise.resolve(true);
    }

    canSetPollQuestion() {
        return Promise.resolve(true);
    }

    hasRole(roleId) {
        if (!this.loggedIn) {
            Promise.resolve(undefined);
        }

        return Promise.resolve(this.user.getRoles().includes(roleId));
    }

    getStatusRoleForCurrentUser() {
        return Promise.resolve(this.defaultStatusRole);
    }

    getAllStatusRoles() {
        return Promise.resolve([this.defaultStatusRole]);
    }

    getStatusForRole(role) {
        return Promise.resolve(this.status);
    }

    async getDefaultStatusForRole(role) {
        const allRoles = await this.getPossibleStatuses();

        return allRoles?.[0];
    }

    setStatusForRole(role, status) {
        status.timestamp = Date.now();
        this.status = status;
        this.emit('statusChange', {
            role,
            status
        });

        return true;
    }

    // eslint-disable-next-line require-await
    async getPollQuestion() {
        if (this.pollQuestion) {
            return this.pollQuestion;
        } else {
            return undefined;
        }
    }

    setPollQuestion(pollQuestion) {
        if (!pollQuestion) {
            // If the poll question is undefined, set it to a blank string.
            // This behavior better reflects how other telemetry systems
            // deal with undefined poll questions.
            pollQuestion = '';
        }

        this.pollQuestion = {
            question: pollQuestion,
            timestamp: Date.now()
        };
        this.emit("pollQuestionChange", this.pollQuestion);

        return true;
    }

    getPossibleStatuses() {
        return Promise.resolve(STATUSES);
    }

    _login() {
        const id = uuid();

        // for testing purposes, this will skip the form, this wouldn't be used in
        // a normal authentication process
        if (this.autoLoginUser) {
            this.user = new this.ExampleUser(id, this.autoLoginUser, ['example-role']);
            this.loggedIn = true;

            return Promise.resolve();
        }

        const formStructure = {
            title: "Login",
            sections: [
                {
                    rows: [
                        {
                            key: "username",
                            control: "textfield",
                            name: "Username",
                            pattern: "\\S+",
                            required: true,
                            cssClass: "l-input-lg",
                            value: ''
                        }
                    ]
                }
            ],
            buttons: {
                submit: {
                    label: 'Login'
                }
            }
        };

        return this.openmct.forms.showForm(formStructure).then(
            (info) => {
                this.user = new this.ExampleUser(id, info.username, ['example-role']);
                this.loggedIn = true;
            },
            () => { // user canceled, setting a default username
                this.user = new this.ExampleUser(id, 'Pat', ['example-role']);
                this.loggedIn = true;
            }
        );
    }
}
/**
 * @typedef {import('@/api/user/StatusUserProvider').default} StatusUserProvider
 */