import React from 'react';
import _ from 'lodash';
import Reflux from 'reflux';
import StoreMixin from 'reflux-immutable/StoreMixin';
import moment from 'moment';
import {Link, History, State} from 'react-router';

// Stampy
import DataTable from 'bd-stampy/components/DataTable';
import {Tab, TabView, TabContent} from 'bd-stampy/components/Tabs';

// TRC
import CourseStore from 'trc-client-core/src/course/CourseStore';
import CourseActions from 'trc-client-core/src/course/CourseActions';
import Loader from 'trc-client-core/src/components/Loader';
import ModalConfirm from 'trc-client-core/src/Modal/ModalConfirm';
import ModalManager from 'trc-client-core/src/Modal/ModalManager';
import UserStore from 'trc-client-core/src/user/UserStore';
import CourseListQueryView from 'trc-client-core/src/course/CourseListQueryView';

import {
    IconClipboard,
    IconDocument,
    IconPerson,
    IconTelevision,
    IconAward,
    IconThumbsUp
} from 'trc-client-core/src/components/Icons';

import {
    E_LEARNING,
    FACE_TO_FACE,
    LOCAL_QUIZ,
    DOCUMENT,
    ACHIEVEMENT,
    CERTIFICATION
} from 'trc-client-core/src/constants/CourseType';

var CoursesAdminView = React.createClass({
    displayName: 'CoursesAdminView',
    contextTypes: {
        location: React.PropTypes.object
    },
    mixins: [
        require('bd-stampy/mixins/FormMixin'),
        Reflux.listenTo(CourseStore, 'onStoreChange'),
        StoreMixin,
        History,
        State
    ],
    getStoreState() {
        return {
            courses: CourseStore.get('courses')
        };
    },
    componentDidMount() {
        CourseActions.fetchCourses({onlyViewable: false});
    },
    FormMixin_initialFormData(nextState) {
        nextState.formData = _.defaults(this.context.location.query, {
            type: 'ALL',
            stream: 'ALL',
            departmentCategory: 'ALL'
        });
        return nextState;
    },
    onDelete(id) {
        ModalManager.showModal(ModalConfirm, {
            title: 'Delete Course',
            yes: 'Delete',
            message: 'Are you sure you want to delete this course?',
            onYes: () => {
                CourseStore.course.del(id).then(
                    () => {
                        CourseActions.fetchCourses({onlyViewable: false});
                        this.history.pushState(null, '/course', this.context.location.query);
                    }
                );
            }
        });
    },
    onPublish(course) {
        ModalManager.showModal(ModalConfirm, {
            title: 'Publish Course',
            yes: 'Publish',
            message: `Are you sure you want to publish this course?`,
            onYes: () => {
                CourseActions.publish(course);
            }
        });
    },
    onChange(e, details) {
        var param = {};
        param[details.key] = details.value;
        this.history.replaceState(null, '/course', _.defaults(param, this.context.location.query));
        this.FormMixin_onFormChange(e, details);
    },
    onTabChange(e) {
        this.history.replaceState(null, '/course', {tab: e});
    },
    onPagingate(e, page) {
        this.history.replaceState(null, '/course', {
            tab: this.context.location.query.tab,
            page: page
        });
    },
    filterMissingCourses() {
        return this.state.courses.toJS().filter((data) => {
            return [
                'workshopName',
                'abbreviatedName',
                'attendance',
                'courseCode',
                'courseIcon',
                'departmentCategory',
                'duration',
                'learningOutcomes',
                'overview'
            ].some(prop => {
                return !(data[prop] && /\S/.test(data[prop]));
            });
        });
    },
    render() {
        if(!this.state.courses) {
            return null;
        }

        var qaCourses = this.filterMissingCourses();
        return (
            <div>
                <h1>Courses</h1>
                <CourseListQueryView onChange={this.onChange} value={this.state.formData}/>
                <div className="padding flush-right right">
                    <Link to="/course/new" className="Button Button-edit">New Course</Link>
                </div>
                <TabView onChange={this.onTabChange} transition={false} defaultTab={parseInt(this.context.location.query.tab || 1)}>
                    <Tab>All Courses</Tab>
                    <TabContent>
                        {this.renderErrors(this.state.error)}
                        {this.renderCourseTable(this.state.courses.toJS())}
                    </TabContent>

                    <Tab onClick={this.tabClick}>{`QA (${qaCourses.length})`}</Tab>
                    <TabContent>
                        {this.renderCourseTable(qaCourses)}
                    </TabContent>

                </TabView>
            </div>
        );
    },
    renderQueryView(key) {
        return <CourseListQueryView key={key} onChange={this.onChange} value={this.state.formData}/>;
    },
    renderErrors(error) {
        if(error) {
            return <div className="InfoBox InfoBox-error">
                {error.errorMessage}
            </div>;
        }
    },
    renderCourseTable(courses) {
        var pageAmmount = 50;
        var currentPage = parseInt(this.context.location.query.page, 10) || 0;
        if(!courses) {
            return <Loader></Loader>;
        }

        var filtered = courses.filter(CourseStore.filterCourses(this.state.formData));

        var tableSchema = [{
            heading: 'Name',
            filter: 'workshopName',
            width: '30%',
            render: (item) => <Link to={`/course/${item.courseCode}`} className="link">{item.workshopName}</Link>
        }, {
            heading: 'Course Code',
            filter: 'courseCode',
            width: '15%',
            render: (item) => item.courseCode || ' - '
        }, {
            heading: 'Date Modified',
            filter: 'lastModified',
            render: (item) => moment(new Date(item.lastModified || 0)).format('YYYY-MM-DD')
        }, {
            heading: 'Stream',
            filter: 'stream',
            render: (item) => _.startCase(item.stream)
        }, {
            heading: 'Type',
            filter: 'type',
            render: this.renderCourseStatus
        }, {
            heading: 'Quality',
            filter: 'type',
            render: item => {
                var values = _(item).values();
                var filled = values.filter(str => !(String(str).length === 0 || !String(str).trim()));
                var decimal = filled.value().length / values.value().length
                return <span className={(decimal <= 0.8) ? 't-red' : ''}>{`${Math.floor(decimal * 100)}%`}</span>
            }
        }, {
            heading: 'Actions',
            render: this.renderActions,
            width: '15%'
        }];

        return <DataTable
            schema={tableSchema}
            data={filtered}
            pagination={true}
            paginationLength={pageAmmount}
            paginationPage={currentPage}
            onPagingate={this.onPagingate}
            modifier="data"
        />;
    },
    renderActions(dd) {
        var test;
        var badgeColor = (dd.draft) ? 'Button-green' : '';
        var publish = <a key="publish" className={badgeColor + " Button Button-small w100"} onClick={this.onPublish.bind(null, dd)}>Publish</a>;
        var deleteButton = <a key="delete" className="Button Button-small Button-grey w100" onClick={this.onDelete.bind(this, dd.id)}>Delete</a>;

        if(dd.type === 'E_LEARNING' && dd.eLearningTag.moduleId) {
            test = <a key="test" className="Button Button-small Button-grey w100" href={`${UserStore.get('elearningServer')}tester/${dd.eLearningTag.moduleId}`}>Test</a>;
        }

        // You cannot publish an elearning course that hasnt been tested
        if(!dd.draft || (dd.type === 'E_LEARNING' && !dd.eLearningTag.testResult) && UserStore.isnt('ROLE_MEGA_ADMIN')) {
            publish = null;
        }

        // You cannot delte published courses
        if(!dd.draft) {
            deleteButton = null;
        }



        return <div>
            <Link key="edit" to={`/course/${dd.courseCode}/edit`} className="Button Button-small Button-edit w100">Edit</Link>
            {deleteButton}
            {test}
            {publish}
        </div>;
    },
    renderCourseStatus(dd) {
        var className;

        if(dd.type === 'E_LEARNING') {
            className = (dd.eLearningTag.testResult) ? 't-green' : 't-red';
            if(!dd.eLearningTag.moduleId) {
                className = '';
            }
        }

        switch(dd.type) {
            case E_LEARNING:
                return <IconTelevision className={className} />;

            case FACE_TO_FACE:
                return <IconPerson className={className} />;

            case LOCAL_QUIZ:
                return <IconClipboard className={className} />;

            case DOCUMENT:
                return <IconDocument className={className} />;

            case ACHIEVEMENT:
                return <IconThumbsUp className={className} />;

            case CERTIFICATION:
                return <IconAward className={className} />;

        }
    }
});

module.exports = CoursesAdminView;