"use client";

import Link from "next/link";
import { usePathname, useRouter } from "next/navigation";
import { FC, useState, useEffect } from "react";
import { LayoutDashboard, Users, ChevronLeft, ChevronRight, User, LogOut } from "lucide-react";
import { cn } from "@/lib/utils";
import { createClient } from "@/lib/supabase/client";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";

const navItems = [
  { href: "/dashboard", icon: LayoutDashboard, label: "Overview" },
  { href: "/dashboard/settings/team", icon: Users, label: "Team" },
];

export const Sidebar: FC = () => {
  const pathname = usePathname();
  const router = useRouter();
  const [collapsed, setCollapsed] = useState(false);
  const [user, setUser] = useState<{ id: string; email: string } | null>(null);
  const [organizationName, setOrganizationName] = useState<string>("Organization");
  const supabase = createClient();

  useEffect(() => {
    const fetchOrg = async (userId: string) => {
      const { data: profile } = await supabase.from("profiles").select("organization_id").eq("id", userId).single();
      if (profile?.organization_id) {
        const { data: org } = await supabase.from("organizations").select("name").eq("id", profile.organization_id).single();
        if (org?.name) {
          setOrganizationName(org.name);
        }
      }
    };

    supabase.auth.getUser().then(({ data: { user: currentUser } }) => {
      if (currentUser) {
        setUser({ id: currentUser.id, email: currentUser.email ?? "" });
        fetchOrg(currentUser.id);
      }
    });

    const { data: { subscription } } = supabase.auth.onAuthStateChange((event, session) => {
      if (session?.user) {
        setUser({ id: session.user.id, email: session.user.email ?? "" });
        fetchOrg(session.user.id);
      } else {
        setUser(null);
        setOrganizationName("Organization");
      }
    });

    return () => {
      subscription.unsubscribe();
    };
  }, [supabase]);

  const handleLogout = async () => {
    await supabase.auth.signOut();
    router.refresh();
  };

  return (
    <aside
      className={cn(
        "flex flex-col h-screen border-r border-border bg-background transition-all duration-300",
        collapsed ? "w-16" : "w-64"
      )}
    >
      <div className="flex items-center justify-between p-4 border-b border-border h-16">
        {!collapsed && <span className="font-semibold text-sm truncate">{organizationName}</span>}
        <button
          onClick={() => setCollapsed(!collapsed)}
          className={cn("p-1 rounded-md hover:bg-muted transition-colors flex-shrink-0", collapsed && "mx-auto")}
        >
          {collapsed ? <ChevronRight size={18} /> : <ChevronLeft size={18} />}
        </button>
      </div>

      <nav className="flex-1 p-2 space-y-1 overflow-y-auto">
        {navItems.map((item) => {
          // Exact match for the root dashboard, prefix match for others to keep them highlighted if nested
          const isActive = item.href === "/dashboard" ? pathname === "/dashboard" : pathname.startsWith(item.href);
          const Icon = item.icon;
          return (
            <Link
              key={item.href}
              href={item.href}
              className={cn(
                "flex items-center gap-3 px-3 py-2 rounded-md text-sm transition-colors",
                isActive ? "bg-accent text-accent-foreground font-medium" : "text-muted-foreground hover:bg-muted hover:text-foreground",
                collapsed && "justify-center px-0"
              )}
            >
              <Icon size={18} className="shrink-0" />
              {!collapsed && <span>{item.label}</span>}
            </Link>
          );
        })}
      </nav>

      <div className="p-2 border-t border-border mt-auto">
        <DropdownMenu>
          <DropdownMenuTrigger className={cn(
            "flex items-center gap-3 w-full p-2 rounded-md hover:bg-muted text-sm transition-colors outline-none focus-visible:ring-2 focus-visible:ring-ring data-[state=open]:bg-muted",
            collapsed ? "justify-center px-0" : "px-3"
          )}>
            <div className="flex items-center justify-center bg-accent text-accent-foreground rounded-full w-8 h-8 shrink-0 overflow-hidden">
              <User size={16} />
            </div>
            {!collapsed && (
              <span className="truncate flex-1 text-left font-medium">
                {user?.email || "User"}
              </span>
            )}
          </DropdownMenuTrigger>
          <DropdownMenuContent align={collapsed ? "center" : "end"} side="right" sideOffset={8} className="w-56">
            <DropdownMenuLabel className="font-normal">
              <div className="flex flex-col space-y-1">
                <p className="text-sm font-medium leading-none">Account</p>
                <p className="text-xs leading-none text-muted-foreground">
                  {user?.email || "Unknown email"}
                </p>
              </div>
            </DropdownMenuLabel>
            <DropdownMenuSeparator />
            <DropdownMenuItem className="cursor-pointer text-destructive focus:text-destructive focus:bg-destructive/10" onClick={handleLogout}>
              <LogOut className="mr-2 h-4 w-4" />
              <span>Log out</span>
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
      </div>
    </aside>
  );
};