import urlapi from 'url';
import React, { Fragment } from 'react';
import { Link, NavLink } from 'react-router-dom';

import Sidebar from './sidebar';
import Tooltip from './tooltip';
import InfoBox from './info-box';
import { EditIcon } from './icons';
import { parseCategoryURL } from '../parse';

import CONFIG from './fields-config.json';


const BuildingView = (props) => {
    if (!props.building_id){
        return (
            <Sidebar title="Building Not Found">
                <InfoBox msg="We can't find that one anywhere - try the map again?" />
                <div className="buttons-container with-space">
                    <Link to="/view/age.html" className="btn btn-secondary">Back to maps</Link>
                </div>
            </Sidebar>
        );
    }
    const cat = parseCategoryURL(props.match.url);
    return (
        <Sidebar title={`Data available for this building`} back={`/view/${cat}.html`}>
            {
                CONFIG.map(section_props => (
                    <DataSection
                        key={section_props.slug} cat={cat}
                        building_id={props.building_id}
                        {...section_props}>
                        {
                            section_props.fields.map(field_props => {

                                switch (field_props.type) {
                                    case "uprn_list":
                                        return <UPRNsDataEntry
                                            key={field_props.slug}
                                            title={field_props.title}
                                            value={props.uprns}
                                            tooltip={field_props.tooltip} />
                                    case "text_multi":
                                        return <MultiDataEntry
                                            key={field_props.slug}
                                            title={field_props.title}
                                            value={props[field_props.slug]}
                                            tooltip={field_props.tooltip} />
                                    default:
                                        return <DataEntry
                                            key={field_props.slug}
                                            title={field_props.title}
                                            value={props[field_props.slug]}
                                            tooltip={field_props.tooltip} />
                                }
                            })
                        }
                    </DataSection>
                ))
            }
        </Sidebar>
    );
}


const DataSection = (props) => {
    const match = props.cat === props.slug;
    return (
        <section id={props.slug} className={(props.inactive)? "data-section inactive": "data-section"}>
            <header className={(match? "active " : "") + " section-header view"}>
                <NavLink
                    to={`/view/${props.slug}/building/${props.building_id}.html`}
                    title={(props.inactive)? 'Coming soon… Click the ? for more info.' :
                        (match)? 'Hide details' : 'Show details'}
                    isActive={() => match}>
                    <h3 className="h3">{props.title}</h3>
                </NavLink>
                <nav className="icon-buttons">
                {
                    props.help?
                    <a className="icon-button help" title="Find out more" href={props.help}>
                        More info
                    </a>
                    : null
                }
                {
                    !props.inactive?
                    <NavLink className="icon-button edit" title="Edit data"
                        to={`/edit/${props.slug}/building/${props.building_id}.html`}>
                        Edit
                        <EditIcon />
                    </NavLink>
                    : null
                }
                </nav>
            </header>
            { match? <dl className="data-list">{props.children}</dl> : null }
        </section>
    );
}

const DataEntry = (props) => (
    <Fragment>
        <dt>
            { props.title }
            { props.tooltip? <Tooltip text={ props.tooltip } /> : null }
        </dt>
        <dd>{(props.value != null)? props.value : '\u00A0'}</dd>
    </Fragment>
);

const MultiDataEntry = (props) => {
    let content;

    if (props.value && props.value.length) {
        content = <ul>{
            props.value.map((item, index) => {
                return <li key={index}><a href={sanitise_url(item)}>{item}</a></li>
            })
        }</ul>
    } else {
        content = '\u00A0'
    }

    return (
        <Fragment>
            <dt>
                { props.title }
                { props.tooltip? <Tooltip text={ props.tooltip } /> : null }
            </dt>
            <dd>{ content }</dd>
        </Fragment>
    );
}

function sanitise_url(string){
    let url_

    // http or https
    if (!(string.substring(0, 7) === 'http://' || string.substring(0, 8) === 'https://')){
        return null
    }

    try {
        url_ = document.createElement('a')
        url_.href = string
    } catch (error) {
        try {
            url_ = urlapi.parse(string)
        } catch (error) {
            return null
        }
    }

    // required (www.example.com)
    if (!url_.hostname || url_.hostname === '' || url_.hostname === 'localhost'){
        return null
    }

    // optional (/some/path)
    // url_.pathname;

    // optional (?name=value)
    // url_.search;

    // optional (#anchor)
    // url_.hash;

    return `${url_.protocol}//${url_.hostname}${url_.pathname || ''}${url_.search || ''}${url_.hash || ''}`
}

const UPRNsDataEntry = (props) => {
    const uprns = props.value || [];
    const no_parent = uprns.filter(uprn => uprn.parent_uprn == null);
    const with_parent = uprns.filter(uprn => uprn.parent_uprn != null);

    return (
    <Fragment>
        <dt>
            { props.title }
            { props.tooltip? <Tooltip text={ props.tooltip } /> : null }
        </dt>
        <dd><ul className="uprn-list">
            <Fragment>{
                no_parent.length?
                    no_parent.map(uprn => (
                        <li key={uprn.uprn}>{uprn.uprn}</li>
                    ))
                : '\u00A0'
            }</Fragment>
            {
                with_parent.length?
                <details>
                    <summary>Children</summary>
                    {
                    with_parent.map(uprn => (
                        <li key={uprn.uprn}>{uprn.uprn} (child of {uprn.parent_uprn})</li>
                        ))
                    }
                </details>
                : null
            }
        </ul></dd>
    </Fragment>
    )
}

export default BuildingView;