import { requireAdmin } from "~/server/auth/utils";
import Link from "next/link";
import { Button } from "~/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "~/components/ui/card";
import { Badge } from "~/components/ui/badge";
import { Separator } from "~/components/ui/separator";
import { AdminUserTable } from "~/components/admin/admin-user-table";
import { SystemStats } from "~/components/admin/system-stats";
import { RoleManagement } from "~/components/admin/role-management";

export default async function AdminPage() {
  const session = await requireAdmin();

  return (
    <div className="min-h-screen bg-gradient-to-br from-slate-50 to-slate-100">
      <div className="container mx-auto px-4 py-8">
        {/* Header */}
        <div className="mb-8 flex items-center justify-between">
          <div>
            <h1 className="text-3xl font-bold text-slate-900">
              System Administration
            </h1>
            <p className="text-slate-600">
              Manage users, roles, and system settings
            </p>
          </div>

          <div className="flex items-center gap-4">
            <Badge variant="destructive">Administrator</Badge>
            <span className="text-sm text-slate-600">
              {session.user.name ?? session.user.email}
            </span>
            <div className="flex gap-2">
              <Button asChild variant="outline" size="sm">
                <Link href="/profile">Profile</Link>
              </Button>
              <Button asChild variant="outline">
                <Link href="/">← Back to Home</Link>
              </Button>
            </div>
          </div>
        </div>

        {/* Admin Dashboard Grid */}
        <div className="grid grid-cols-1 gap-6 lg:grid-cols-4">
          {/* System Overview */}
          <div className="lg:col-span-4">
            <Card>
              <CardHeader>
                <CardTitle>System Overview</CardTitle>
                <CardDescription>
                  Current system status and statistics
                </CardDescription>
              </CardHeader>
              <CardContent>
                <SystemStats />
              </CardContent>
            </Card>
          </div>

          {/* Quick Actions */}
          <div className="lg:col-span-1">
            <Card>
              <CardHeader>
                <CardTitle>Quick Actions</CardTitle>
                <CardDescription>Common admin tasks</CardDescription>
              </CardHeader>
              <CardContent className="space-y-3">
                <Button className="w-full justify-start" variant="outline" disabled>
                  <svg
                    className="mr-2 h-4 w-4"
                    fill="none"
                    stroke="currentColor"
                    viewBox="0 0 24 24"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth={2}
                      d="M18 9v3m0 0v3m0-3h3m-3 0h-3m-2-5a4 4 0 11-8 0 4 4 0 018 0zM3 20a6 6 0 0112 0v1H3v-1z"
                    />
                  </svg>
                  Create User
                </Button>

                <Button className="w-full justify-start" variant="outline" disabled>
                  <svg
                    className="mr-2 h-4 w-4"
                    fill="none"
                    stroke="currentColor"
                    viewBox="0 0 24 24"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth={2}
                      d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"
                    />
                  </svg>
                  System Health
                </Button>

                <Button className="w-full justify-start" variant="outline" disabled>
                  <svg
                    className="mr-2 h-4 w-4"
                    fill="none"
                    stroke="currentColor"
                    viewBox="0 0 24 24"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth={2}
                      d="M12 10v6m0 0l-3-3m3 3l3-3m2 8H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"
                    />
                  </svg>
                  Export Data
                </Button>

                <Button className="w-full justify-start" variant="outline" disabled>
                  <svg
                    className="mr-2 h-4 w-4"
                    fill="none"
                    stroke="currentColor"
                    viewBox="0 0 24 24"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth={2}
                      d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z"
                    />
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth={2}
                      d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"
                    />
                  </svg>
                  Settings
                </Button>

                <Separator />

                <Button className="w-full justify-start" variant="outline" disabled>
                  <svg
                    className="mr-2 h-4 w-4"
                    fill="none"
                    stroke="currentColor"
                    viewBox="0 0 24 24"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth={2}
                      d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"
                    />
                  </svg>
                  Audit Logs
                </Button>
              </CardContent>
            </Card>

            {/* Role Management */}
            <Card className="mt-6">
              <CardHeader>
                <CardTitle>Role Management</CardTitle>
                <CardDescription>System role definitions</CardDescription>
              </CardHeader>
              <CardContent>
                <RoleManagement />
              </CardContent>
            </Card>
          </div>

          {/* User Management */}
          <div className="lg:col-span-3">
            <Card>
              <CardHeader>
                <CardTitle>User Management</CardTitle>
                <CardDescription>
                  Manage user accounts and role assignments
                </CardDescription>
              </CardHeader>
              <CardContent>
                <AdminUserTable />
              </CardContent>
            </Card>
          </div>
        </div>

        {/* Security Warning */}
        <div className="mt-8">
          <Card className="border-yellow-200 bg-yellow-50">
            <CardContent className="pt-6">
              <div className="flex items-start gap-3">
                <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-yellow-100">
                  <svg
                    className="h-5 w-5 text-yellow-600"
                    fill="none"
                    stroke="currentColor"
                    viewBox="0 0 24 24"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth={2}
                      d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-2.5L13.732 4c-.77-.833-1.728-.833-2.498 0L4.316 16.5c-.77.833.192 2.5 1.732 2.5z"
                    />
                  </svg>
                </div>
                <div>
                  <h3 className="font-semibold text-yellow-900">
                    Administrator Access
                  </h3>
                  <p className="mt-1 text-sm text-yellow-800">
                    You have full administrative access to this system. Please use these
                    privileges responsibly. All administrative actions are logged for
                    security purposes.
                  </p>
                </div>
              </div>
            </CardContent>
          </Card>
        </div>
      </div>
    </div>
  );
}