import React, { useState, useRef, useEffect } from 'react';
import Login from './Login';

interface HeaderProps {
    onViewChange: (view: 'AI' | 'FAQ' | 'Documentation' | 'Credits') => void;
    showDivs: boolean;
    toggleDivs: () => void;
    showHistoryModelsToggle: boolean;
    showToggle: boolean;
}

const Header: React.FC<HeaderProps> = ({
    onViewChange,
    showDivs,
    toggleDivs,
    showHistoryModelsToggle,
    showToggle,
}) => {
    const [menuOpen, setMenuOpen] = useState(false);
    const dropdownRef = useRef<HTMLDivElement | null>(null);
    const toggleRef = useRef<HTMLDivElement | null>(null);

    // Toggle menu state
    const toggleMenu = () => {
        setMenuOpen((prevMenuOpen) => !prevMenuOpen);
    };

    // Handle button click
    const buttonClicked = (page: "AI" | "Documentation" | "FAQ" | "Credits") => {
        onViewChange(page);
        setMenuOpen(false); // Close the menu when a button is clicked
    };

    // Effect to handle clicks outside of the dropdown
    useEffect(() => {
        const handleClickOutside = (event: MouseEvent) => {
            if (
                dropdownRef.current && 
                !dropdownRef.current.contains(event.target as Node) &&
                toggleRef.current && 
                !toggleRef.current.contains(event.target as Node)
            ) {
                setMenuOpen(false);
            }
        };

        document.addEventListener('mousedown', handleClickOutside);

        return () => {
            document.removeEventListener('mousedown', handleClickOutside);
        };
    }, []);

    return (
        <>
            <header>
                {showToggle && showHistoryModelsToggle && (
                    <button onClick={toggleDivs} className="nav-btn show-hide-btn">
                        {showDivs ? (
                            <>
                                <svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 640 512">
                                    <path d="M38.8 5.1C28.4-3.1 13.3-1.2 5.1 9.2S-1.2 34.7 9.2 42.9l592 464c10.4 8.2 25.5 6.3 33.7-4.1s6.3-25.5-4.1-33.7L525.6 386.7c39.6-40.6 66.4-86.1 79.9-118.4c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C465.5 68.8 400.8 32 320 32c-68.2 0-125 26.3-169.3 60.8L38.8 5.1zM223.1 149.5C248.6 126.2 282.7 112 320 112c79.5 0 144 64.5 144 144c0 24.9-6.3 48.3-17.4 68.7L408 294.5c8.4-19.3 10.6-41.4 4.8-63.3c-11.1-41.5-47.8-69.4-88.6-71.1c-5.8-.2-9.2 6.1-7.4 11.7c2.1 6.4 3.3 13.2 3.3 20.3c0 10.2-2.4 19.8-6.6 28.3l-90.3-70.8zM373 389.9c-16.4 6.5-34.3 10.1-53 10.1c-79.5 0-144-64.5-144-144c0-6.9 .5-13.6 1.4-20.2L83.1 161.5C60.3 191.2 44 220.8 34.5 243.7c-3.3 7.9-3.3 16.7 0 24.6c14.9 35.7 46.2 87.7 93 131.1C174.5 443.2 239.2 480 320 480c47.8 0 89.9-12.9 126.2-32.5L373 389.9z"/>
                                </svg>
                            </>
                        ) : (
                            <>
                                <svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512">
                                    <path d="M288 32c-80.8 0-145.5 36.8-192.6 80.6C48.6 156 17.3 208 2.5 243.7c-3.3 7.9-3.3 16.7 0 24.6C17.3 304 48.6 356 95.4 399.4C142.5 443.2 207.2 480 288 480s145.5-36.8 192.6-80.6c46.8-43.5 78.1-95.4 93-131.1c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C433.5 68.8 368.8 32 288 32zM144 256a144 144 0 1 1 288 0 144 144 0 1 1 -288 0zm144-64c0 35.3-28.7 64-64 64c-7.1 0-13.9-1.2-20.3-3.3c-5.5-1.8-11.9 1.6-11.7 7.4c.3 6.9 1.3 13.8 3.2 20.7c13.7 51.2 66.4 81.6 117.6 67.9s81.6-66.4 67.9-117.6c-11.1-41.5-47.8-69.4-88.6-71.1c-5.8-.2-9.2 6.1-7.4 11.7c2.1 6.4 3.3 13.2 3.3 20.3z"/>
                                </svg>
                            </>
                        )}
                    </button>
                )}
                <nav ref={dropdownRef} className={`nav-links ${menuOpen ? "active" : ""}`}>
                    <button onClick={() => buttonClicked("AI")} className="nav-btn">Chat</button>
                    <button onClick={() => buttonClicked("FAQ")} className="nav-btn">FAQ</button>
                    <button onClick={() => buttonClicked("Documentation")} className="nav-btn">Documentation</button>
                    <button onClick={() => buttonClicked("Credits")} className="nav-btn">Credits</button>
                </nav>
                <div ref={toggleRef} className={`hamburger ${menuOpen ? "open" : ""}`} onClick={toggleMenu}>
                    <span></span>
                    <span></span>
                    <span></span>
                </div>
                <div className="header-logo">
                    {/* AI logo or text */}
                </div>
                <div className="login-button-container">
                    <Login />
                </div>
            </header>
        </>
    );
};

export default Header;