import { useState, useEffect } from 'react';
import { Card, CardContent, CardHeader, CardTitle } from "/components/ui/card";
import { Input } from "/components/ui/input";
import { Textarea } from "/components/ui/textarea";
import { Button } from "/components/ui/button";
import { Label } from "/components/ui/label";

interface Message {
  id: number;
  content: string;
  name: string | null;
}

export default function PublicMessageBoard() {
  const [messages, setMessages] = useState<Message[]>([]);
  const [newMessage, setNewMessage] = useState('');
  const [name, setName] = useState('');
  const [successMessage, setSuccessMessage] = useState('');

  useEffect(() => {
    const storedMessages = localStorage.getItem('messages');
    if (storedMessages) {
      setMessages(JSON.parse(storedMessages));
    }
  }, []);

  useEffect(() => {
    localStorage.setItem('messages', JSON.stringify(messages));
  }, [messages]);

  const handleSubmit = (e: React.FormEvent<HTMLFormElement>) => {
    e.preventDefault();
    if (newMessage.trim() === '') return;

    const message: Message = {
      id: Date.now(),
      content: newMessage,
      name: name.trim() || null,
    };

    setMessages((prevMessages) => [message, ...prevMessages]);
    setNewMessage('');
    setName('');
    setSuccessMessage('Message posted successfully!');
    setTimeout(() => setSuccessMessage(''), 3000);
  };

  return (
    <div className="container mx-auto p-4 max-w-2xl mt-8">
      <Card>
        <CardHeader>
          <CardTitle>Public Message Board</CardTitle>
        </CardHeader>
        <CardContent>
          <form onSubmit={handleSubmit} className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="name">Name (optional)</Label>
              <Input
                id="name"
                value={name}
                onChange={(e) => setName(e.target.value)}
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="message">Message</Label>
              <Textarea
                id="message"
                value={newMessage}
                onChange={(e) => setNewMessage(e.target.value)}
                required
                className="min-h-[100px]"
              />
            </div>
            <Button type="submit">Post Message</Button>
            {successMessage && (
              <p className="text-green-600">{successMessage}</p>
            )}
          </form>
          <div className="mt-8 space-y-4">
            <h2 className="text-lg font-bold">Messages:</h2>
            {messages.map((message) => (
              <div key={message.id} className="border-b pb-2">
                <p>{message.content}</p>
                <p className="text-sm text-gray-600">
                  {message.name || 'Anonymous'}
                </p>
              </div>
            ))}
          </div>
        </CardContent>
      </Card>
    </div>
  );
}