'use client';

import Image from 'next/image';
import { useState, useRef, useEffect, useCallback } from 'react';

interface MessageInputProps {
  onSend?: (message: string) => void;
  onTypingStart?: () => void;
  onTypingStop?: () => void;
}

export function MessageInput({ onSend, onTypingStart, onTypingStop }: MessageInputProps) {
  const [message, setMessage] = useState('');
  const typingTimeoutRef = useRef<NodeJS.Timeout | null>(null);
  const isTypingRef = useRef(false);

  // Handle typing indicator
  const handleTyping = useCallback(() => {
    // Start typing indicator
    if (!isTypingRef.current && onTypingStart) {
      isTypingRef.current = true;
      onTypingStart();
    }

    // Clear existing timeout
    if (typingTimeoutRef.current) {
      clearTimeout(typingTimeoutRef.current);
    }

    // Set timeout to stop typing indicator after 2 seconds of inactivity
    typingTimeoutRef.current = setTimeout(() => {
      if (isTypingRef.current && onTypingStop) {
        isTypingRef.current = false;
        onTypingStop();
      }
    }, 2000);
  }, [onTypingStart, onTypingStop]);

  // Cleanup on unmount
  useEffect(() => {
    return () => {
      if (typingTimeoutRef.current) {
        clearTimeout(typingTimeoutRef.current);
      }
      if (isTypingRef.current && onTypingStop) {
        onTypingStop();
      }
    };
  }, [onTypingStop]);

  const handleSend = () => {
    if (message.trim() && onSend) {
      // Stop typing indicator before sending
      if (typingTimeoutRef.current) {
        clearTimeout(typingTimeoutRef.current);
      }
      if (isTypingRef.current && onTypingStop) {
        isTypingRef.current = false;
        onTypingStop();
      }

      onSend(message.trim());
      setMessage('');
    }
  };

  const handleKeyDown = (e: React.KeyboardEvent) => {
    if (e.key === 'Enter' && !e.shiftKey) {
      e.preventDefault();
      handleSend();
    }
  };

  const handleChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
    setMessage(e.target.value);
    handleTyping();
  };

  return (
    <div className="border border-[#00293d]/10 rounded-[20px] bg-white p-4">
      {/* Text input area */}
      <div className="border border-[#00293d]/10 rounded-[20px] p-4 mb-3">
        <textarea
          value={message}
          onChange={handleChange}
          onKeyDown={handleKeyDown}
          placeholder="Write a Message........"
          className="w-full min-h-[120px] resize-none font-serif font-normal text-[14px] leading-[19px] text-[#00293D] placeholder-[#00293D]/50 focus:outline-none"
        />
      </div>

      {/* Action bar */}
      <div className="flex items-center justify-between">
        {/* Attachment buttons */}
        <div className="flex items-center gap-3">
          <button className="p-1.5 hover:bg-gray-100 rounded-lg transition-colors cursor-pointer">
            <Image
              src="/assets/icons/gallery-icon.svg"
              alt="Add image"
              width={24}
              height={24}
            />
          </button>
          <button className="p-1.5 hover:bg-gray-100 rounded-lg transition-colors cursor-pointer">
            <Image
              src="/assets/icons/chain-icon.svg"
              alt="Add link"
              width={24}
              height={24}
            />
          </button>
          <button className="p-1.5 hover:bg-gray-100 rounded-lg transition-colors cursor-pointer">
            <Image
              src="/assets/icons/gif-icon.svg"
              alt="Add GIF"
              width={24}
              height={24}
            />
          </button>
          <button className="p-1.5 hover:bg-gray-100 rounded-lg transition-colors cursor-pointer">
            <Image
              src="/assets/icons/emoji-icon.svg"
              alt="Add emoji"
              width={24}
              height={24}
            />
          </button>
        </div>

        {/* Send button and more options */}
        <div className="flex items-center gap-2">
          <button
            onClick={handleSend}
            disabled={!message.trim()}
            className={`px-4 py-1.5 font-serif font-normal text-[14px] leading-[19px] rounded-[15px] transition-colors cursor-pointer ${
              message.trim()
                ? 'bg-[#e58625] text-[#00293d] hover:bg-[#d47720]'
                : 'bg-[#e58625]/50 text-[#00293d]/50 cursor-not-allowed'
            }`}
          >
            Send
          </button>
          <button className="p-1.5 hover:bg-gray-100 rounded-lg transition-colors cursor-pointer">
            <Image
              src="/assets/icons/three-dots-icon.svg"
              alt="More options"
              width={24}
              height={24}
            />
          </button>
        </div>
      </div>
    </div>
  );
}