import { useComputed, useSignal } from '@preact/signals'
import Fuse from 'fuse.js'
import { useEffect } from 'preact/hooks'
import { ShowMore } from './Paginate'
import { ComboBox } from './ComboBox'

type User = {
    uid: string
    gecos: string
}

const FILTERS = {
    utenti: {
        icon: 'person',
        label: 'Utenti',
    },
    macchinisti: {
        icon: 'construction',
        label: 'Macchinisti',
    },
    rappstud: {
        icon: 'account_balance',
        label: 'Rappresentanti',
    },
}

function applyPatches(users: User[]) {
    users.forEach(user => {
        // strip ",+" from the end of the gecos field
        user.gecos = user.gecos.replace(/,+$/, '')

        // capitalize the first letter of each word
        user.gecos = user.gecos.replace(/\b\w/g, c => c.toUpperCase())
    })

    // reverse the order of the users
    users.reverse()
}

const MACCHINISTI = ['delucreziis', 'minnocci', 'baldino', 'manicastri', 'llombardo', 'serdyuk']

const RAPPSTUD = [
    'smannella',
    'lotti',
    'rotolo',
    'saccani',
    'carbone',
    'mburatti',
    'ppuddu',
    'marinari',
    'evsilvestri',
    'tateo',
    'graccione',
    'dilella',
    'rocca',
    'odetti',
    'borso',
    'numero',
]

export const UtentiPage = () => {
    const $utentiData = useSignal<User[]>([])

    const $filter = useSignal('utenti')

    const $filteredData = useComputed(() =>
        $filter.value === 'macchinisti'
            ? $utentiData.value.filter(user => MACCHINISTI.includes(user.uid))
            : $filter.value === 'rappstud'
            ? $utentiData.value.filter(user => RAPPSTUD.includes(user.uid))
            : $utentiData.value
    )

    const $fuse = useComputed(
        () =>
            new Fuse($filteredData.value, {
                keys: ['gecos', 'uid'],
            })
    )

    const $searchText = useSignal('')
    const $searchResults = useComputed(() =>
        $searchText.value.trim().length > 0
            ? $fuse.value?.search($searchText.value).map(result => result.item) ?? []
            : $filteredData.value
    )

    useEffect(() => {
        fetch('https://poisson.phc.dm.unipi.it/users.json')
            .then(response => response.json())
            .then(data => {
                applyPatches(data)

                $utentiData.value = data

                $fuse.value.setCollection(data)
            })
    }, [])

    return (
        <>
            <div class="search-bar">
                <ComboBox value={$filter.value} setValue={s => ($filter.value = s)}>
                    {Object.fromEntries(
                        Object.entries(FILTERS).map(([k, v]) => [
                            k,
                            <>
                                <span class="material-symbols-outlined">{v.icon}</span> {v.label}
                            </>,
                        ])
                    )}
                </ComboBox>
                <div class="search">
                    <input
                        type="text"
                        placeholder="Cerca un utente Poisson..."
                        onInput={e => ($searchText.value = e.currentTarget.value)}
                        value={$searchText.value}
                    />
                    <span class="material-symbols-outlined">search</span>
                </div>
            </div>
            <div class="search-results">
                {$searchResults.value ? (
                    <ShowMore items={$searchResults} pageSize={100}>
                        {poissonUser => (
                            <div class="search-result">
                                <div class="icon">
                                    <span class="material-symbols-outlined">
                                        {RAPPSTUD.includes(poissonUser.uid)
                                            ? 'account_balance'
                                            : MACCHINISTI.includes(poissonUser.uid)
                                            ? 'construction'
                                            : 'person'}
                                    </span>
                                </div>
                                <div class="text">{poissonUser.gecos}</div>
                                <div class="right">
                                    <a
                                        href={`https://poisson.phc.dm.unipi.it/~${poissonUser.uid}`}
                                        target="_blank"
                                    >
                                        <span class="material-symbols-outlined">open_in_new</span>
                                    </a>
                                </div>
                            </div>
                        )}
                    </ShowMore>
                ) : (
                    <>Nessun risultato</>
                )}
            </div>
        </>
    )
}