"use client";

import { usePoll } from "@/lib/use-poll";
import { StatCard } from "@/components/stat-card";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { StatusBadge } from "@/components/status-badge";
import { DataTable, Column } from "@/components/data-table";

interface AdGuardStats {
  total_queries?: number;
  num_dns_queries?: number;
  blocked?: number;
  num_blocked_filtering?: number;
  avg_time?: number;
  avg_processing_time?: number;
}

interface HeadscaleNode {
  id: string;
  name: string;
  ip_addresses?: string[];
  ip?: string;
  online: boolean;
  last_seen?: string;
}

interface DnsRewrite {
  domain: string;
  answer: string;
}

export default function NetworkPage() {
  const { data: adguard } = usePoll<AdGuardStats>("/api/network/adguard", 60000);
  const { data: nodesRaw } = usePoll<HeadscaleNode[] | { nodes: HeadscaleNode[] }>("/api/network/headscale", 30000);
  const { data: rewritesRaw } = usePoll<DnsRewrite[] | { rewrites: DnsRewrite[] }>("/api/network/adguard/rewrites", 120000);

  const nodes = Array.isArray(nodesRaw) ? nodesRaw : (nodesRaw?.nodes ?? []);
  const rewrites = Array.isArray(rewritesRaw) ? rewritesRaw : (rewritesRaw?.rewrites ?? []);

  const rewriteColumns: Column<DnsRewrite>[] = [
    {
      key: "domain",
      label: "Domain",
      render: (row) => <span className="font-medium text-foreground">{row.domain}</span>,
    },
    { key: "answer", label: "Answer" },
  ];

  return (
    <div className="space-y-6">
      <h1 className="text-lg font-semibold">Network</h1>

      {/* Top row: AdGuard stats */}
      <div className="grid grid-cols-1 sm:grid-cols-3 lg:grid-cols-3 gap-3 lg:gap-4">
        <StatCard
          label="Total Queries"
          value={(() => { const v = adguard?.total_queries ?? adguard?.num_dns_queries; return v != null ? v.toLocaleString() : "\u2014"; })()}
          sub="DNS queries"
        />
        <StatCard
          label="Blocked"
          value={(() => { const v = adguard?.blocked ?? adguard?.num_blocked_filtering; return v != null ? v.toLocaleString() : "\u2014"; })()}
          sub="blocked by filters"
        />
        <StatCard
          label="Avg Response"
          value={(() => { const v = adguard?.avg_time ?? adguard?.avg_processing_time; return v != null ? `${(v * 1000).toFixed(1)}ms` : "\u2014"; })()}
          sub="processing time"
        />
      </div>

      {/* Middle: Headscale nodes grid */}
      <Card>
        <CardHeader className="pb-2">
          <CardTitle className="text-sm font-medium">Headscale Nodes</CardTitle>
        </CardHeader>
        <CardContent>
          {nodes.length === 0 ? (
            <p className="text-xs text-muted-foreground">Loading...</p>
          ) : (
            <div className="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-4 xl:grid-cols-5 gap-3">
              {nodes.map((node) => (
                <Card key={node.id} className="overflow-hidden">
                  <CardContent className="pt-3 pb-3 px-4">
                    <div className="flex items-center gap-2 mb-1">
                      <span className={`w-2 h-2 rounded-full shrink-0 ${node.online ? "bg-green-500 glow-green" : "bg-red-500 glow-red"}`} />
                      <span className="text-sm font-medium text-foreground truncate">{node.name}</span>
                    </div>
                    <p className="text-[10px] text-muted-foreground font-mono">
                      {node.ip_addresses?.[0] ?? node.ip ?? "—"}
                    </p>
                    {node.last_seen && (
                      <p className="text-[10px] text-muted-foreground mt-0.5">
                        {new Date(node.last_seen).toLocaleString("en-US", {
                          month: "short", day: "numeric", hour: "2-digit", minute: "2-digit",
                        })}
                      </p>
                    )}
                  </CardContent>
                </Card>
              ))}
            </div>
          )}
        </CardContent>
      </Card>

      {/* Bottom: DNS rewrites table */}
      <Card>
        <CardHeader className="pb-2">
          <CardTitle className="text-sm font-medium">DNS Rewrites</CardTitle>
        </CardHeader>
        <CardContent>
          <DataTable<DnsRewrite>
            data={rewrites}
            columns={rewriteColumns}
            searchKey="domain"
          />
        </CardContent>
      </Card>
    </div>
  );
}