import * as _ from 'lodash';
import * as React from 'react';
import DocumentTitle from 'react-document-title';
import styled from 'styled-components';

import { AboutPageLayout } from 'ts/components/aboutPageLayout';
import { Link } from 'ts/components/link';
import { Column, FlexWrap, Section } from 'ts/components/newLayout';
import { Heading, Paragraph } from 'ts/components/text';
import { Container } from 'ts/components/ui/container';
import { colors } from 'ts/style/colors';
import { WebsiteBackendJobInfo } from 'ts/types';
import { backendClient } from 'ts/utils/backend_client';
import { constants } from 'ts/utils/constants';

const OPEN_POSITIONS_HASH = 'positions';

interface PositionProps {
    title: string;
    location: string;
    href: string;
}

interface PositionItemProps {
    position: PositionProps;
}

const Position: React.FunctionComponent<PositionItemProps> = (props: PositionItemProps) => {
    const { position } = props;
    return (
        <PositionWrap>
            <StyledColumn width="50%">
                <Container position="relative" top="-3px" paddingRight="12px">
                    <Heading asElement="h3" size="small" fontWeight="400" marginBottom="0">
                        <a href={position.href} target="_blank">
                            {position.title}
                        </a>
                    </Heading>
                </Container>
            </StyledColumn>

            <StyledColumn width="30%" padding="0 40px 0 0">
                <Paragraph isMuted={true} marginBottom="0">
                    {position.location}
                </Paragraph>
            </StyledColumn>

            <StyledColumn width="20%">
                <Paragraph marginBottom="0" textAlign="right" color={colors.brandDark} fontWeight={400}>
                    <Link href={position.href} target="_blank">
                        Apply
                    </Link>
                </Paragraph>
            </StyledColumn>
        </PositionWrap>
    );
};

export interface NextAboutJobsProps {}
interface NextAboutJobsState {
    jobInfos: WebsiteBackendJobInfo[];
}

export class NextAboutJobs extends React.Component<NextAboutJobsProps, NextAboutJobsState> {
    private _isUnmounted: boolean;
    private static _convertJobInfoToPositionProps(jobInfo: WebsiteBackendJobInfo): PositionProps {
        return {
            title: jobInfo.title,
            location: jobInfo.office,
            href: jobInfo.url,
        };
    }
    constructor(props: NextAboutJobsProps) {
        super(props);
        this.state = {
            jobInfos: [],
        };
    }

    public componentWillMount(): void {
        // tslint:disable-next-line:no-floating-promises
        this._fetchJobInfosAsync();
    }
    public componentWillUnmount(): void {
        this._isUnmounted = true;
    }
    public render(): React.ReactNode {
        const positions = this.state.jobInfos.map(jobInfo => NextAboutJobs._convertJobInfoToPositionProps(jobInfo));
        return (
            <AboutPageLayout
                title="Join Us in Our Mission"
                description={
                    <>
                        <Paragraph size="medium">
                            To create a tokenized world where all value can flow freely.
                        </Paragraph>
                        <Paragraph size="medium">
                            We are growing an ecosystem of businesses and projects by solving difficult challenges to
                            make our technology intuitive, flexible, and accessible to all. Join us in building
                            infrastructure upon which the exchange of all assets will take place.
                        </Paragraph>
                    </>
                }
                linkLabel="Our mission and values"
                href={constants.URL_MISSION_AND_VALUES_BLOG_POST}
            >
                <DocumentTitle title="Jobs at 0x" />
                <Section bgColor="#F3F6F4" isFlex={true} maxWidth="1170px" wrapWidth="100%">
                    <Column maxWidth="442px">
                        <Heading size="medium" marginBottom="30px">
                            Powered by a Diverse, Global Community
                        </Heading>

                        <Paragraph>
                            We're a highly technical team with varied backgrounds in engineering, science, business,
                            finance, and research. While the Core Team is headquartered in San Francisco, there are 30+
                            teams building on 0x and hundreds of thousands of participants behind our efforts worldwide.
                            We're passionate about open-source software and decentralized technology's potential to act
                            as an equalizing force in the world.
                        </Paragraph>
                    </Column>

                    <Column maxWidth="600px">
                        <ImageWrap>
                            <img src="/images/jobs/map@2x.png" height="365" alt="Map of community" />
                        </ImageWrap>
                    </Column>
                </Section>

                <Section isFlex={true} maxWidth="1170px" wrapWidth="100%">
                    <Column>
                        <Heading size="medium">Benefits</Heading>
                    </Column>

                    <Column maxWidth="826px">
                        <BenefitsList>
                            <li>Comprehensive Insurance</li>
                            <li>Unlimited Vacation</li>
                            <li>Meals and snacks provided daily</li>
                            <li>Flexible hours and liberal work-from-home-policy</li>
                            <li>Supportive of remote working</li>
                            <li>Transportation, phone, and wellness expense</li>
                            <li>Relocation assistance</li>
                            <li>Optional team excursions</li>
                            <li>Competitive salary</li>
                            <li>Cryptocurrency based compensation</li>
                        </BenefitsList>
                    </Column>
                </Section>

                <Section id={OPEN_POSITIONS_HASH} isFlex={true} maxWidth="1170px" wrapWidth="100%">
                    <Column>
                        <Heading size="medium">
                            Current<br />Openings
                        </Heading>
                    </Column>

                    <Column maxWidth="826px">
                        {_.map(positions, (position, index) => (
                            <Position key={`position-${index}`} position={position} />
                        ))}
                    </Column>
                </Section>
            </AboutPageLayout>
        );
    }
    private async _fetchJobInfosAsync(): Promise<void> {
        try {
            if (!this._isUnmounted) {
                this.setState({
                    jobInfos: [],
                });
            }
            const jobInfos = await backendClient.getJobInfosAsync();
            if (!this._isUnmounted) {
                this.setState({
                    jobInfos,
                });
            }
        } catch (error) {
            if (!this._isUnmounted) {
                this.setState({
                    jobInfos: [],
                });
            }
        }
    }
}

const BenefitsList = styled.ul`
    color: #000;
    font-weight: 300;
    line-height: 1.444444444;
    list-style: disc;
    columns: auto 2;
    column-gap: 80px;

    li {
        margin-bottom: 1em;
    }
`;

const ImageWrap = styled.figure`
    @media (min-width: 768px) {
        height: 600px;
        padding-left: 60px;
        display: flex;
        align-items: flex-end;
    }
`;

const StyledColumn = styled(Column)`
    flex-shrink: 0;

    @media (max-width: 768px) {
        & + & {
            margin-top: 15px;
        }
    }
`;

const PositionWrap = styled(FlexWrap)`
    margin-bottom: 40px;
    padding-bottom: 30px;
    position: relative;

    &:after {
        content: '';
        width: 100%;
        position: absolute;
        bottom: 0;
        left: 0;
        height: 1px;
        background-color: #e3e3e3;
    }
`;