"use client";

import { useSession, signOut } from "next-auth/react";
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { NotificationBell } from "@/components/notifications/NotificationBell";
import { getInitials } from "@/lib/utils";
import { LogOut, User, Settings, Menu } from "lucide-react";
import Link from "next/link";
import { useMobileNav } from "@/components/layout/MobileNav";

interface HeaderProps {
  title?: string;
  breadcrumbs?: { label: string; href?: string }[];
}

export function Header({ title, breadcrumbs }: HeaderProps) {
  const { data: session } = useSession();
  const user = session?.user;
  const { setOpen: setMobileNavOpen } = useMobileNav();

  return (
    <header className="flex h-14 items-center justify-between border-b border-zinc-800 bg-zinc-950 px-4 md:px-6">
      {/* Left: Title / Breadcrumbs */}
      <div className="flex items-center gap-2 min-w-0">
        {/* Phones only: the sidebar is hidden below md and opens as a drawer. */}
        <button
          type="button"
          onClick={() => setMobileNavOpen(true)}
          className="md:hidden -ml-2 rounded-md p-2 text-zinc-400 hover:bg-zinc-800 hover:text-white"
          aria-label="Open menu"
        >
          <Menu className="h-5 w-5" />
        </button>
        {breadcrumbs ? (
          <nav className="flex items-center gap-1.5 text-sm">
            {breadcrumbs.map((crumb, i) => (
              <span key={i} className="flex items-center gap-1.5">
                {i > 0 && <span className="text-muted-foreground">/</span>}
                {crumb.href ? (
                  <Link
                    href={crumb.href}
                    className="text-muted-foreground hover:text-foreground transition-colors"
                  >
                    {crumb.label}
                  </Link>
                ) : (
                  <span className="text-foreground font-medium truncate">
                    {crumb.label}
                  </span>
                )}
              </span>
            ))}
          </nav>
        ) : (
          title && (
            <h1 className="text-sm font-semibold truncate">{title}</h1>
          )
        )}
      </div>

      {/* Right: Notifications + User menu */}
      <div className="flex items-center gap-3">
        <NotificationBell />

        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <button className="flex items-center gap-2 rounded-md px-2 py-1.5 text-sm hover:bg-secondary transition-colors">
              <Avatar className="h-7 w-7">
                {user?.image && <AvatarImage src={user.image} alt={user.name ?? ""} />}
                <AvatarFallback className="text-xs">
                  {getInitials(user?.name)}
                </AvatarFallback>
              </Avatar>
              <div className="hidden sm:block text-left">
                <p className="text-xs font-medium leading-none">{user?.name ?? user?.email}</p>
                <p className="text-xs text-muted-foreground capitalize">
                  {user?.role?.toLowerCase()}
                </p>
              </div>
            </button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="end" className="w-48">
            <DropdownMenuLabel>
              <p className="font-medium truncate">{user?.name}</p>
              <p className="text-xs text-muted-foreground font-normal truncate">
                {user?.email}
              </p>
            </DropdownMenuLabel>
            <DropdownMenuSeparator />
            <DropdownMenuItem asChild>
              <Link href="/settings" className="flex items-center gap-2 cursor-pointer">
                <Settings className="h-4 w-4" />
                Settings
              </Link>
            </DropdownMenuItem>
            <DropdownMenuSeparator />
            <DropdownMenuItem
              className="text-destructive focus:text-destructive cursor-pointer"
              onClick={() => signOut({ callbackUrl: "/login" })}
            >
              <LogOut className="h-4 w-4 mr-2" />
              Sign out
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
      </div>
    </header>
  );
}