import { format, compareAsc, addDays, isFuture } from 'date-fns';

export function dateInfo (item) {
    const isDate = item.date.match(/^\d{4}-\d{2}-\d{2}$/)
    const future = isDate && !isFuture(new Date(item.date));
    const dateMatch = item.date.match(/^(\d{4})/)
    const year = dateMatch ? dateMatch[1] : null

    return { isDate, isFuture: future, year }
}

export function dateFormat (str) {
    if (str.match(/^\d{4}-\d{2}-\d{2}$/)) {
        return format(new Date(str), 'MMM d, yyyy')
    }
    const qm = str.match(/^(\d{4})\/(\w+)$/)
    if (qm) {
        return `${qm[2]}, ${qm[1]}`
    }
    return str
}

export function dateEnd(str, days) {
    return format(addDays(new Date(str), days-1), 'yyyy-MM-dd');
}

export function nameRenderer (item, full = false) {
    let num;
    let ccm = item.coincidence?.match(/\[(\w+)\]/)
    let cc = ccm && ccm[1] ? ccm[1] : (item.coincidence ? item.coincidence : null)
    const date = dateInfo(item)
    switch (item.type) {
        case 'summit':
            //num = item.id.match(/^w3ps(\d+)$/)[1]
            return `Summmit ${item.city}` + (full ? ` ${date.year}`: '')// + (cc ? ` @ ${cc}` : '')
            break;
        case 'meetup':
            //num = item.id.match(/(\d+)$/)
            return `Meetup ${item.city}` + (full ? ` ${date.year}`: '')// + (cc ? ` @ ${cc}` : '')
            break;
        case 'hackathon':
            //num = item.id.match(/^w3ph(\d+)$/)[1]
            return `Hackathon ${item.city}` + (full ? ` ${date.year}`: '')// + (cc ? ` @ ${cc}` : '')
            break;
        case 'privacy-corner':
            return `Privacy Corner at `+ (item.coincidenceFull ? item.coincidenceFull : `${item.coincidence} ${date.year}`)
            break;
    }
}

export function ccRenderer (item) {
    let ccm = item.coincidence?.match(/\[(\w+)\]/)
    let cc = ccm && ccm[1] ? ccm[1] : (item.coincidence ? item.coincidence : null)
    return cc
}

export function eventStatus (item) {
    const statuses = {
        preregistration: {
            title: 'Pre-registration',
            color: 'text-orange-500',
        },
        unconfirmed: {
            title: 'Planned',
            color: ''
        },
        confirmed: {
            title: 'Confirmed',
            color: 'text-green-500',
        },
        past: {
            title: 'Already happened',
            color: 'text-green-800',
        }
    }
    
    const date = dateInfo(item)
    return item.confirmed
        ? (date.isDate ? statuses.past : statuses.confirmed)
        : (item.links?.rsvp ? statuses.preregistration : statuses.unconfirmed);
}

export function getSpeaker (core, id) {
    return core.people.find(p => p.id === id)
}

export function findExt (eventsExt, item) {
    let slug = null
    if (item.links?.web && item.links.web.match(/^https:\/\/lu.ma\//)) {
        slug = item.links.web.match(/^https:\/\/lu.ma\/(.+)$/)[1]
    }
    if (item.links?.rsvp && item.links.rsvp.match(/^https:\/\/lu.ma\//)) {
        slug = item.links.rsvp.match(/^https:\/\/lu.ma\/(.+)$/)[1]
    }
    if (!slug) {
        return null
    }
    return eventsExt.find(ex => ex.url === slug)
}