"use client";

import Link from "next/link";
import Image from "next/image";
import { usePathname } from "next/navigation";
import { useAuth } from "@/hooks/useAuth";
import { useSiteSettings } from "@/contexts/SiteSettingsContext";
import { BottomNav } from "./BottomNav";
import churchLogo from "@/app/church_logo.jpg";
import { appName } from "@/lib/siteConfig";
import { resolveToApiOrigin } from "@/lib/api";

type NavLink = {
    href: string;
    label: string;
    onClick?: () => void;
};

export const Navbar = () => {
    const { user, loading: authLoading, logout } = useAuth();
    const { settings, loading: settingsLoading } = useSiteSettings();
    const pathname = usePathname();
    const displayName = settings.org_name || appName;
    const logoSrc      = settings.logo_url ? resolveToApiOrigin(settings.logo_url) : null;

    const isActive = (href: string) => {
        if (href.includes("#")) return false;
        if (href === "/") return pathname === "/";
        return pathname?.startsWith(href) ?? false;
    };

    const handleLogout = () => {
        logout();
        window.location.href = "/";
    };

    const navLinks: NavLink[] = [
        { href: "/", label: "Home" },
        { href: "/events", label: "Events" },
        { href: "/contact", label: "Contact" },
    ];

    const authLinks: NavLink[] = user
        ? [
            { href: "/dashboard", label: "Dashboard" },
            {
                href: "#",
                label: "Logout",
                onClick: handleLogout,
            },
        ]
        : [
            { href: "/login", label: "Login" },
            { href: "/register", label: "Register" },
        ];

    return (
        <>
            <header className="bg-white shadow-md sticky top-0 z-50">
                <nav className="max-w-7xl mx-auto px-4 py-3 flex items-center justify-between">
                    <Link href="/" className="flex items-center gap-2">
                        {settingsLoading ? (
                            <div className="h-10 w-10 rounded-sm bg-gray-100 animate-pulse" />
                        ) : logoSrc ? (
                            // eslint-disable-next-line @next/next/no-img-element
                            <img src={logoSrc} alt="Logo" className="h-10 w-auto object-contain rounded-sm" />
                        ) : (
                            <Image
                                src={churchLogo}
                                alt="Church logo"
                                width={50}
                                height={50}
                                className="rounded-sm object-contain"
                                priority
                            />
                        )}
                        {!settingsLoading && (
                            <span className="text-xl font-bold text-brand-600">{displayName}</span>
                        )}
                    </Link>

                    {/* Desktop links */}
                    <div className="hidden md:flex items-center space-x-6">
                        {navLinks.map(link => (
                            <Link
                                key={link.href}
                                href={link.href}
                                className={
                                    "text-sm pb-0.5 border-b-2 transition-colors " +
                                    (isActive(link.href)
                                        ? "text-brand-600 border-brand-600 font-medium"
                                        : "text-gray-700 border-transparent hover:text-brand-600")
                                }
                            >
                                {link.label}
                            </Link>
                        ))}

                        {/* Auth links are only known once the token has been validated —
                            rendering nothing here (instead of guessing "logged out") avoids
                            a Login/Register -> Dashboard/Logout flash on every load. */}
                        {!authLoading && authLinks.map(link =>
                            link.onClick ? (
                                <button
                                    key={link.label}
                                    onClick={link.onClick}
                                    className="text-sm pb-0.5 border-b-2 border-transparent text-gray-700 hover:text-brand-600 transition-colors"
                                >
                                    {link.label}
                                </button>
                            ) : (
                                <Link
                                    key={link.href}
                                    href={link.href}
                                    className={
                                        "text-sm pb-0.5 border-b-2 transition-colors " +
                                        (isActive(link.href)
                                            ? "text-brand-600 border-brand-600 font-medium"
                                            : "text-gray-700 border-transparent hover:text-brand-600")
                                    }
                                >
                                    {link.label}
                                </Link>
                            )
                        )}
                    </div>
                </nav>
            </header>
            <BottomNav />
        </>
    );
};