import { useMemo } from "react";
import { faPhoneMissed } from "@fortawesome/pro-duotone-svg-icons";
import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import { Badge } from "@/components/base/badges/badges";
import { ClickToCallButton } from "@/components/call-desk/click-to-call-button";
import type { Call } from "@/types/entities";

const getTimeSince = (dateStr: string | null): string => {
    if (!dateStr) return "—";
    const mins = Math.floor((Date.now() - new Date(dateStr).getTime()) / 60000);
    if (mins < 1) return "Just now";
    if (mins < 60) return `${mins}m ago`;
    const hours = Math.floor(mins / 60);
    if (hours < 24) return `${hours}h ago`;
    return `${Math.floor(hours / 24)}d ago`;
};

interface MissedQueueProps {
    calls: Call[];
}

export const MissedQueue = ({ calls }: MissedQueueProps) => {
    const missedCalls = useMemo(() => {
        return calls
            .filter((c) => c.callStatus === "MISSED")
            .sort((a, b) => {
                const dateA = a.startedAt ? new Date(a.startedAt).getTime() : 0;
                const dateB = b.startedAt ? new Date(b.startedAt).getTime() : 0;
                return dateB - dateA;
            })
            .slice(0, 15);
    }, [calls]);

    return (
        <div className="rounded-xl border border-secondary bg-primary shadow-xs">
            <div className="flex items-center justify-between border-b border-secondary px-4 py-3">
                <div className="flex items-center gap-2">
                    <FontAwesomeIcon icon={faPhoneMissed} className="size-3.5 text-fg-error-primary" />
                    <h3 className="text-sm font-semibold text-primary">Missed Call Queue</h3>
                </div>
                {missedCalls.length > 0 && (
                    <Badge size="sm" color="error">
                        {missedCalls.length}
                    </Badge>
                )}
            </div>
            <div className="max-h-[500px] overflow-y-auto">
                {missedCalls.length === 0 ? (
                    <div className="flex flex-col items-center justify-center gap-2 py-10">
                        <FontAwesomeIcon icon={faPhoneMissed} className="size-6 text-fg-quaternary" />
                        <p className="text-sm text-tertiary">No missed calls</p>
                    </div>
                ) : (
                    <ul className="divide-y divide-secondary">
                        {missedCalls.map((call) => {
                            const phone = call.callerNumber?.[0]?.number ?? "";
                            const display = phone ? `+91 ${phone}` : "Unknown";
                            return (
                                <li
                                    key={call.id}
                                    className="flex items-center justify-between px-4 py-2.5 transition duration-100 ease-linear hover:bg-primary_hover"
                                >
                                    <div className="flex flex-col">
                                        <span className="text-sm font-medium text-primary">{display}</span>
                                        <span className="text-xs text-tertiary">{getTimeSince(call.startedAt)}</span>
                                    </div>
                                    {phone && <ClickToCallButton phoneNumber={phone} size="sm" />}
                                </li>
                            );
                        })}
                    </ul>
                )}
            </div>
        </div>
    );
};