"use client";

import { useState } from "react";
import Link from "next/link";
import { usePathname, useRouter } from "next/navigation";
import { signOut } from "next-auth/react";
import { cn } from "@/lib/utils";
import { Button } from "@/components/ui/button";
import {
  LayoutDashboard,
  Wallet,
  Tags,
  BarChart3,
  Upload,
  ChevronLeft,
  ChevronRight,
  Settings,
  Wand2,
  LogOut,
} from "lucide-react";
import { toast } from "sonner";
import { Sheet, SheetContent } from "@/components/ui/sheet";
import { useIsMobile } from "@/hooks/use-mobile";

const navItems = [
  { href: "/", label: "Tableau de bord", icon: LayoutDashboard },
  { href: "/accounts", label: "Comptes", icon: Wallet },
  { href: "/transactions", label: "Transactions", icon: Upload },
  { href: "/categories", label: "Catégories", icon: Tags },
  { href: "/rules", label: "Règles", icon: Wand2 },
  { href: "/statistics", label: "Statistiques", icon: BarChart3 },
];

interface SidebarContentProps {
  collapsed?: boolean;
  onNavigate?: () => void;
}

function SidebarContent({ collapsed = false, onNavigate, showHeader = false }: SidebarContentProps & { showHeader?: boolean }) {
  const pathname = usePathname();
  const router = useRouter();

  const handleSignOut = async () => {
    try {
      await signOut({ redirect: false });
      toast.success("Déconnexion réussie");
      router.push("/login");
      router.refresh();
    } catch (error) {
      console.error("Error signing out:", error);
      toast.error("Erreur lors de la déconnexion");
    }
  };

  const handleLinkClick = () => {
    onNavigate?.();
  };

  return (
    <>
      {showHeader && (
        <div className="flex items-center justify-between p-4 border-b border-border">
          {!collapsed && (
            <div className="flex items-center gap-2">
              <div className="w-8 h-8 rounded-lg bg-primary flex items-center justify-center">
                <Wallet className="w-5 h-5 text-primary-foreground" />
              </div>
              <span className="font-semibold text-foreground">FinTrack</span>
            </div>
          )}
        </div>
      )}

      <nav className="flex-1 p-2 space-y-1">
        {navItems.map((item) => {
          const isActive = pathname === item.href;
          return (
            <Link key={item.href} href={item.href} onClick={handleLinkClick}>
              <Button
                variant={isActive ? "secondary" : "ghost"}
                className={cn(
                  "w-full justify-start gap-3",
                  collapsed && "justify-center px-2",
                )}
              >
                <item.icon className="w-5 h-5 shrink-0" />
                {!collapsed && <span>{item.label}</span>}
              </Button>
            </Link>
          );
        })}
      </nav>

      <div className="p-2 border-t border-border space-y-1">
        <Link href="/settings" onClick={handleLinkClick}>
          <Button
            variant="ghost"
            className={cn(
              "w-full justify-start gap-3",
              collapsed && "justify-center px-2",
            )}
          >
            <Settings className="w-5 h-5 shrink-0" />
            {!collapsed && <span>Paramètres</span>}
          </Button>
        </Link>
        <Button
          variant="ghost"
          onClick={handleSignOut}
          className={cn(
            "w-full justify-start gap-3 text-destructive hover:text-destructive hover:bg-destructive/10",
            collapsed && "justify-center px-2",
          )}
        >
          <LogOut className="w-5 h-5 shrink-0" />
          {!collapsed && <span>Déconnexion</span>}
        </Button>
      </div>
    </>
  );
}

interface SidebarProps {
  open?: boolean;
  onOpenChange?: (open: boolean) => void;
}

export function Sidebar({ open, onOpenChange }: SidebarProps) {
  const [collapsed, setCollapsed] = useState(false);
  const isMobile = useIsMobile();

  if (isMobile) {
    return (
      <Sheet open={open} onOpenChange={onOpenChange}>
        <SheetContent side="left" className="w-64 p-0">
          <div className="flex flex-col h-full">
            <SidebarContent showHeader onNavigate={() => onOpenChange?.(false)} />
          </div>
        </SheetContent>
      </Sheet>
    );
  }

  return (
    <aside
      className={cn(
        "hidden md:flex flex-col h-screen bg-card border-r border-border transition-all duration-300",
        collapsed ? "w-16" : "w-64",
      )}
    >
      <div className="flex items-center justify-between p-4 border-b border-border">
        {!collapsed && (
          <div className="flex items-center gap-2">
            <div className="w-8 h-8 rounded-lg bg-primary flex items-center justify-center">
              <Wallet className="w-5 h-5 text-primary-foreground" />
            </div>
            <span className="font-semibold text-foreground">FinTrack</span>
          </div>
        )}
        <Button
          variant="ghost"
          size="icon"
          onClick={() => setCollapsed(!collapsed)}
          className="ml-auto"
        >
          {collapsed ? (
            <ChevronRight className="w-4 h-4" />
          ) : (
            <ChevronLeft className="w-4 h-4" />
          )}
        </Button>
      </div>

      <SidebarContent collapsed={collapsed} showHeader={false} />
    </aside>
  );
}