"use client";

import { useOrganizations } from "@/hooks/use-master-data";
import { useUsers } from "@/hooks/use-users";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import {
  Users,
  Building2,
  FileText,
  Settings,
  Shield,
  Activity,
  ArrowRight,
} from "lucide-react";
import Link from "next/link";
import { Skeleton } from "@/components/ui/skeleton";
import { Button } from "@/components/ui/button";

export default function AdminPage() {
  const { data: organizations, isLoading: orgsLoading } = useOrganizations();
  const { data: users, isLoading: usersLoading } = useUsers();

  const stats = [
    {
      title: "Total Users",
      value: users?.length || 0,
      icon: Users,
      loading: usersLoading,
      href: "/admin/users",
      color: "text-blue-600",
    },
    {
      title: "Organizations",
      value: organizations?.length || 0,
      icon: Building2,
      loading: orgsLoading,
      href: "/admin/organizations",
      color: "text-green-600",
    },
    {
        title: "System Logs",
        value: "View",
        icon: Activity,
        loading: false,
        href: "/admin/system-logs",
        color: "text-orange-600",
      }
  ];

  const quickLinks = [
    {
      title: "User Management",
      description: "Manage system users, roles, and permissions",
      href: "/admin/users",
      icon: Users,
    },
    {
      title: "Organizations",
      description: "Manage project organizations and companies",
      href: "/admin/organizations",
      icon: Building2,
    },
    {
      title: "Workflow Config",
      description: "Configure document approval workflows",
      href: "/admin/workflows",
      icon: FileText,
    },
    {
      title: "Security & RBAC",
      description: "Configure roles, permissions, and security settings",
      href: "/admin/security/roles",
      icon: Shield,
    },
    {
      title: "Numbering System",
      description: "Setup document numbering templates",
      href: "/admin/numbering",
      icon: Settings,
    },
  ];

  return (
    <div className="space-y-8 p-8">
      <div>
        <h1 className="text-3xl font-bold tracking-tight">Admin Dashboard</h1>
        <p className="text-muted-foreground mt-2">
          System overview and quick access to administrative functions.
        </p>
      </div>

      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
        {stats.map((stat, index) => (
          <Card key={index} className="hover:shadow-md transition-shadow">
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">
                {stat.title}
              </CardTitle>
              <stat.icon className={`h-4 w-4 ${stat.color}`} />
            </CardHeader>
            <CardContent>
              {stat.loading ? (
                <Skeleton className="h-8 w-20" />
              ) : (
                <div className="text-2xl font-bold">{stat.value}</div>
              )}
              {stat.href && (
                <Link
                  href={stat.href}
                  className="text-xs text-muted-foreground hover:underline mt-1 inline-block"
                >
                  View details
                </Link>
              )}
            </CardContent>
          </Card>
        ))}
      </div>

      <div>
        <h2 className="text-xl font-semibold mb-4">Quick Access</h2>
        <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
          {quickLinks.map((link, index) => (
            <Link key={index} href={link.href}>
              <Card className="h-full hover:bg-muted/50 transition-colors cursor-pointer border-l-4 border-l-transparent hover:border-l-primary">
                <CardHeader>
                  <CardTitle className="flex items-center text-lg">
                    <link.icon className="mr-2 h-5 w-5 text-primary" />
                    {link.title}
                  </CardTitle>
                </CardHeader>
                <CardContent>
                  <p className="text-sm text-muted-foreground">
                    {link.description}
                  </p>
                  <Button variant="ghost" className="mt-4 p-0 h-auto font-normal text-primary hover:no-underline group">
                    Go to module <ArrowRight className="ml-1 h-3 w-3 group-hover:translate-x-1 transition-transform" />
                  </Button>
                </CardContent>
              </Card>
            </Link>
          ))}
        </div>
      </div>
    </div>
  );
}