import { CSSProperties } from 'react';

import { Icon } from '../Icon';
import {
    avatarColor,
    formatClock,
    formatCountdown,
    formatCountdownShort,
    formatUntil,
    isReady,
    readyCountOf,
    statusOf,
    type CallToPlayStatus,
} from '../../lib/callToPlay';
import { Game, Nomination } from '../../lib/types';

interface Props {
    nominations: ReadonlyArray<Nomination>;
    games: ReadonlyArray<Game>;
    accent: string;
    onOpen: (callId: string) => void;
}

const LABEL = {
    running: 'Running',
    cancelled: 'Cancelled',
    scheduled: 'Scheduled',
    call: 'Call to Play',
    soon: 'Starting soon',
    ready: 'Ready',
    expired: 'Time’s up',
} as const;

type TickerStatus = CallToPlayStatus;

const RANK: Record<TickerStatus, number> = {
    expired: 0,
    ready: 1,
    soon: 2,
    call: 3,
    scheduled: 3,
    running: 4,
    cancelled: 4,
};

const tickerStatusOf = (nomination: Nomination, now: number): TickerStatus =>
    statusOf(nomination, now);

const MiniBubbles = ({ nomination, now }: { nomination: Nomination; now: number }) => {
    const entries = Object.entries(nomination.participants);
    return (
        <span className="ctp-ticker-bubbles">
            {entries.slice(0, 6).map(([participantId, participant]) => {
                const name = participant.name;
                const ready = isReady(participant, now);
                const state = ready ? 'ready' : participant.status === 'in' ? 'in' : 'pending';
                const initials = name.replace(/[^a-z0-9]/gi, '').slice(0, 2).toUpperCase();
                const remaining = (participant.readyAt ?? now) - now;
                return (
                    <span
                        key={participantId}
                        className="ctp-mini"
                        data-state={state}
                        title={`${name} — ${ready ? 'ready' : state === 'in' ? 'in' : `ready ${formatCountdownShort(remaining)}`}`}
                        style={{ background: avatarColor(name) }}
                    >
                        {initials}
                        {ready && <span className="ctp-mini-check"><Icon.check /></span>}
                        {state === 'pending' && (
                            <i className="ctp-mini-tag">{formatCountdownShort(remaining)}</i>
                        )}
                    </span>
                );
            })}
            {entries.length > 6 && <span className="ctp-mini ctp-mini-more">+{entries.length - 6}</span>}
        </span>
    );
};

export const CallToPlayTicker = ({ nominations, games, accent, onOpen }: Props) => {
    const now = Date.now();
    const gameById = new Map(games.map(game => [game.id, game]));
    const rows = nominations.map(nomination => ({
        nomination,
        status: tickerStatusOf(nomination, now),
    })).sort((left, right) =>
        RANK[left.status] - RANK[right.status]
        || left.nomination.deadline - right.nomination.deadline
    );
    if (rows.length === 0) return null;

    return (
        <div className="ctp-ticker-stack">
            {rows.map(({ nomination, status }) => {
                const game = gameById.get(nomination.gameId);
                const ready = readyCountOf(nomination, now);
                const total = Object.keys(nomination.participants).length;
                const remaining = Math.max(0, nomination.deadline - now);
                const last = nomination.messages[nomination.messages.length - 1];
                const count = status === 'running' || status === 'cancelled'
                    ? `${total} players`
                    : status === 'scheduled'
                    ? `${total} in`
                    : `${ready}/${nomination.maxPlayers} ready`;
                const terminalElapsed = now - (nomination.terminalAt ?? now);
                const terminalAge = terminalElapsed < 1_000
                    ? 'just now'
                    : `${formatCountdownShort(terminalElapsed)} ago`;
                const time = status === 'running'
                    ? `started ${terminalAge}`
                    : status === 'cancelled'
                    ? `cancelled ${terminalAge}`
                    : status === 'ready'
                    ? 'waiting to start'
                    : status === 'expired'
                    ? `${formatCountdownShort(now - nomination.deadline)} ago · waiting for caller`
                    : status === 'scheduled'
                    ? `${formatClock(nomination.scheduledFor!)} · ${formatUntil(nomination.scheduledFor! - now)}`
                    : nomination.scheduledFor !== null
                    ? `starts ${formatClock(nomination.scheduledFor)} · ${formatCountdown(remaining)}`
                    : formatCountdown(remaining);
                return (
                    <button
                        key={nomination.id}
                        className="ctp-ticker"
                        data-status={status}
                        style={{ '--accent': accent } as CSSProperties}
                        onClick={() => onOpen(nomination.id)}
                    >
                        <span className="ctp-ticker-dot" data-status={status} />
                        <span className="ctp-ticker-label" data-status={status}>{LABEL[status]}</span>
                        <span
                            className="ctp-ticker-game"
                            title={game ? undefined : `Game ID: ${nomination.gameId}`}
                        >{game?.name ?? 'Game unavailable here'}</span>
                        <span className="ctp-ticker-by">by {nomination.creator}</span>
                        <span className="ctp-ticker-ready">{count}</span>
                        <span className="ctp-ticker-time">{time}</span>
                        {last ? (
                            <span className="ctp-ticker-chat" title={`${last.from}: ${last.text}`}>
                                <Icon.chat />
                                <b style={{ color: avatarColor(last.from) }}>{last.from}:</b>
                                <span className="ctp-ticker-chat-text">{last.text}</span>
                            </span>
                        ) : <span className="ctp-ticker-chat" />}
                        <MiniBubbles nomination={nomination} now={now} />
                        <span className="ctp-ticker-cta">
                            {status === 'soon' ? 'Check in' : 'View'}<Icon.chevron />
                        </span>
                    </button>
                );
            })}
        </div>
    );
};