import React, { useEffect, useState } from 'react'
import { useRouter } from 'next/router'
import { useSnapshot } from 'valtio'
import { useTranslation } from 'next-i18next'
import classNames from 'classnames'

import { accountState } from '~utils/accountState'
import { formatTimeAgo } from '~utils/timeAgo'

import Button from '~components/Button'
import { ButtonType } from '~utils/enums'

import './index.scss'

interface Props {
    shortcode: string
    id: string
    name: string
    raid: Raid
    grid: GridWeapon[]
    user?: User
    favorited: boolean
    createdAt: Date
    displayUser?: boolean | false
    onClick: (shortcode: string) => void
    onSave?: (partyId: string, favorited: boolean) => void
}

const GridRep = (props: Props) => {
    const numWeapons: number = 9

    const { account } = useSnapshot(accountState)

    const router = useRouter()
    const { t } = useTranslation('common')
    const locale = (router.locale && ['en', 'ja'].includes(router.locale)) ? router.locale : 'en'

    const [mainhand, setMainhand] = useState<Weapon>()
    const [weapons, setWeapons] = useState<GridArray<Weapon>>({})

    const titleClass = classNames({
        'empty': !props.name
    })

    const raidClass = classNames({
        'raid': true,
        'empty': !props.raid
    })

    const userClass = classNames({
        'user': true,
        'empty': !props.user
    })

    useEffect(() => {
        const newWeapons = Array(numWeapons)

        for (const [key, value] of Object.entries(props.grid)) {
            if (value.position == -1)
                setMainhand(value.object)
            else if (!value.mainhand && value.position != null)
                newWeapons[value.position] = value.object
        }

        setWeapons(newWeapons)
    }, [props.grid])

    function navigate() {
        props.onClick(props.shortcode)
    }

    function generateMainhandImage() {
        return (mainhand) ?
            <img alt={mainhand?.name[locale]} src={`${process.env.NEXT_PUBLIC_SIERO_IMG_URL}/weapon-main/${mainhand?.granblue_id}.jpg`} /> : ''
    }

    function generateGridImage(position: number) {
        return (weapons[position]) ?
            <img alt={weapons[position]?.name[locale]} src={`${process.env.NEXT_PUBLIC_SIERO_IMG_URL}/weapon-grid/${weapons[position]?.granblue_id}.jpg`} /> : ''
    }

    function sendSaveData() {
        if (props.onSave)
            props.onSave(props.id, props.favorited)
    }

    const userImage = () => {
        if (props.user)
            return (
                <img 
                    alt={props.user.picture.picture}
                    className={`profile ${props.user.picture.element}`}
                    srcSet={`/profile/${props.user.picture.picture}.png,
                            /profile/${props.user.picture.picture}@2x.png 2x`}
                    src={`/profile/${props.user.picture.picture}.png`} 
                />
            )
        else
            return (<div className="no-user" />)
    }

    const details = (
        <div className="Details">
            <h2 className={titleClass} onClick={navigate}>{ (props.name) ? props.name : t('no_title') }</h2>
            <div className="bottom">
                <div className={raidClass}>{ (props.raid) ? props.raid.name[locale] : t('no_raid') }</div>
                <time className="last-updated" dateTime={props.createdAt.toISOString()}>{formatTimeAgo(props.createdAt, locale)}</time>
            </div>
        </div>
    )
    
    const detailsWithUsername = (
        <div className="Details">
            <div className="top">
                <div className="info">
                    <h2 className={titleClass} onClick={navigate}>{ (props.name) ? props.name : t('no_title') }</h2>
                    <div className={raidClass}>{ (props.raid) ? props.raid.name[locale] : t('no_raid') }</div>
                </div>
                { 
                    (account.authorized && (
                        (props.user && account.user && account.user.id !== props.user.id) 
                        || (!props.user)
                    )) ? 
                        <Button 
                            active={props.favorited} 
                            icon="save" 
                            type={ButtonType.IconOnly} 
                            onClick={sendSaveData} /> 
                    : ''
                }
            </div>
            <div className="bottom">
                <div className={userClass}>
                    { userImage() }
                    { (props.user) ? props.user.username : t('no_user') }
                </div>
                <time className="last-updated" dateTime={props.createdAt.toISOString()}>{formatTimeAgo(props.createdAt, locale)}</time>
            </div>
        </div>
    )

    return (
        <div className="GridRep">
            { (props.displayUser) ? detailsWithUsername : details}
            <div className="Grid" onClick={navigate}>
                <div className="weapon grid_mainhand">
                    {generateMainhandImage()}
                </div>

                <ul className="grid_weapons">
                    {
                        Array.from(Array(numWeapons)).map((x, i) => {
                            return (
                                <li key={`${props.shortcode}-${i}`} className="weapon grid_weapon">
                                    {generateGridImage(i)}
                                </li>
                            )
                        })
                    }
                </ul>
            </div>
        </div>
    )
}

export default GridRep