"use client";

import { useEffect, useState } from "react";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { RefreshCw, Calendar as CalendarIcon } from "lucide-react";
import { useRouter } from "next/navigation";

interface Event {
  id: string;
  title: string;
  start: string;
  end: string;
  allDay: boolean;
  calendar: string;
}

export function Calendar() {
  const [events, setEvents] = useState<Event[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const router = useRouter();

  const fetchEvents = async () => {
    setLoading(true);
    try {
      // Placeholder for actual API call
      // const response = await fetch('/api/calendar/events');
      // const data = await response.json();
      // setEvents(data.events);
      setError(null);
    } catch (err) {
      console.error('Error fetching events:', err);
      setError('Failed to load events');
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => {
    fetchEvents();
  }, []);

  const formatDate = (dateString: string) => {
    const date = new Date(dateString);
    return new Intl.DateTimeFormat('fr-FR', {
      day: '2-digit',
      month: 'short'
    }).format(date);
  };

  return (
    <Card className="transition-transform duration-500 ease-in-out transform hover:scale-105 bg-white/95 backdrop-blur-sm border-0 shadow-lg">
      <CardHeader className="flex flex-row items-center justify-between pb-2 border-b border-gray-100">
        <CardTitle className="text-lg font-semibold text-gray-800">Calendar</CardTitle>
        <Button 
          variant="ghost" 
          size="icon" 
          onClick={() => fetchEvents()}
          className="h-7 w-7 p-0 hover:bg-gray-100/50 rounded-full"
        >
          <RefreshCw className="h-3.5 w-3.5 text-gray-600" />
        </Button>
      </CardHeader>
      <CardContent className="p-3">
        {loading ? (
          <div className="flex items-center justify-center py-6">
            <div className="h-4 w-4 animate-spin rounded-full border-2 border-blue-500 border-t-transparent" />
          </div>
        ) : error ? (
          <div className="text-xs text-red-500 text-center py-3">{error}</div>
        ) : events.length === 0 ? (
          <div className="text-xs text-gray-500 text-center py-6">No upcoming events</div>
        ) : (
          <div className="space-y-2 max-h-[400px] overflow-y-auto pr-1 scrollbar-thin scrollbar-thumb-gray-200 scrollbar-track-transparent">
            {events.map((event) => (
              <div 
                key={event.id}
                className="p-2 rounded-lg bg-white shadow-sm hover:shadow-md transition-all duration-200 border border-gray-100"
              >
                <div className="flex gap-2">
                  <div className="flex-shrink-0 w-12 h-12 rounded-lg bg-blue-50 flex flex-col items-center justify-center border border-blue-100">
                    <CalendarIcon className="h-4 w-4 text-blue-600" />
                    <span className="text-[10px] font-medium text-blue-600 mt-0.5">
                      {formatDate(event.start)}
                    </span>
                  </div>
                  <div className="flex-1 min-w-0 space-y-1">
                    <p className="text-sm font-medium text-gray-800 line-clamp-2">
                      {event.title}
                    </p>
                    <div className="flex items-center text-gray-500 text-[10px] bg-gray-50 px-1.5 py-0.5 rounded-md">
                      <span className="truncate">{event.calendar}</span>
                    </div>
                  </div>
                </div>
              </div>
            ))}
          </div>
        )}
      </CardContent>
    </Card>
  );
}