import { useState, useEffect } from 'react';
import { Clock, X } from 'lucide-react';

export function RateLimitBanner() {
    const [isRateLimited, setIsRateLimited] = useState(false);
    const [waitTime, setWaitTime] = useState(0);
    const [countdown, setCountdown] = useState(0);

    useEffect(() => {
        const handleRateLimit = (e: CustomEvent<{ waitTime: number; url: string }>) => {
            setIsRateLimited(true);
            const seconds = Math.ceil(e.detail.waitTime / 1000);
            setWaitTime(seconds);
            setCountdown(seconds);
        };

        window.addEventListener('api:rate-limited', handleRateLimit as EventListener);
        return () => window.removeEventListener('api:rate-limited', handleRateLimit as EventListener);
    }, []);

    useEffect(() => {
        if (countdown > 0) {
            const timer = setInterval(() => {
                setCountdown(prev => {
                    if (prev <= 1) {
                        setIsRateLimited(false);
                        return 0;
                    }
                    return prev - 1;
                });
            }, 1000);
            return () => clearInterval(timer);
        }
    }, [countdown]);

    if (!isRateLimited) return null;

    return (
        <div className="fixed top-0 left-0 right-0 z-[200] bg-amber-600 text-white px-4 py-3 animate-slide-in shadow-lg">
            <div className="max-w-4xl mx-auto flex items-center justify-between gap-4">
                <div className="flex items-center gap-3">
                    <Clock size={20} />
                    <div>
                        <span className="font-medium">Too many requests.</span>
                        <span className="ml-2 opacity-90">
                            Please wait {countdown}s before trying again.
                        </span>
                    </div>
                </div>
                <button
                    onClick={() => setIsRateLimited(false)}
                    className="p-1 hover:bg-[var(--color-warning)] rounded transition-colors"
                >
                    <X size={18} />
                </button>
            </div>
        </div>
    );
}
