import Link from "next/link";
import { createAdminClient } from "@/lib/supabase/admin";
import { createClient } from "@/lib/supabase/server";
import { redirect } from "next/navigation";
import BannerRows from "./BannerRows";

export const dynamic = "force-dynamic";
export const revalidate = 0;

interface BannerRow {
  id: string;
  slug: string;
  name: string;
  image_path: string;
  click_url: string | null;
  size: "300x250" | "300x600" | "728x90";
  start_date: string | null;
  end_date: string | null;
  status: string;
  adsanity_source_id: number | null;
  notes: string | null;
  updated_at: string;
}

interface StatBucket {
  impressions: number;
  clicks: number;
}
interface BannerStats {
  d1: StatBucket;
  d7: StatBucket;
  lifetime: StatBucket;
}

async function requireAdmin() {
  const sb = await createClient();
  const { data: { user } } = await sb.auth.getUser();
  if (!user) return { ok: false as const };
  const { data: profile } = await sb
    .from("user_profiles")
    .select("role,is_active")
    .eq("id", user.id)
    .maybeSingle();
  if (!profile?.is_active) return { ok: false as const };
  if (!["administrator", "admin"].includes((profile as any).role)) return { ok: false as const };
  return { ok: true as const };
}

async function loadStats(): Promise<Record<string, BannerStats>> {
  const admin = createAdminClient();
  const now = new Date();
  const d1Iso = new Date(now.getTime() - 24 * 3600 * 1000).toISOString();
  const d7Iso = new Date(now.getTime() - 7 * 24 * 3600 * 1000).toISOString();

  async function bucket(table: "ad_impressions" | "ad_clicks", since: string | null) {
    let q = admin.from(table).select("campaign_id");
    if (since) q = q.gte("occurred_at", since);
    const { data } = await q.limit(100000);
    const counts: Record<string, number> = {};
    for (const r of (data || []) as any[]) {
      counts[r.campaign_id] = (counts[r.campaign_id] || 0) + 1;
    }
    return counts;
  }

  const [imp1, imp7, impL, clk1, clk7, clkL] = await Promise.all([
    bucket("ad_impressions", d1Iso),
    bucket("ad_impressions", d7Iso),
    bucket("ad_impressions", null),
    bucket("ad_clicks", d1Iso),
    bucket("ad_clicks", d7Iso),
    bucket("ad_clicks", null),
  ]);

  const ids = new Set<string>([
    ...Object.keys(imp1), ...Object.keys(imp7), ...Object.keys(impL),
    ...Object.keys(clk1), ...Object.keys(clk7), ...Object.keys(clkL),
  ]);
  const out: Record<string, BannerStats> = {};
  for (const id of ids) {
    out[id] = {
      d1: { impressions: imp1[id] || 0, clicks: clk1[id] || 0 },
      d7: { impressions: imp7[id] || 0, clicks: clk7[id] || 0 },
      lifetime: { impressions: impL[id] || 0, clicks: clkL[id] || 0 },
    };
  }
  return out;
}

export default async function AdminBannersPage() {
  const guard = await requireAdmin();
  if (!guard.ok) redirect("/admin");

  const admin = createAdminClient();
  const { data: rows } = await admin
    .from("banner_creatives")
    .select("*")
    .order("size", { ascending: true })
    .order("slug", { ascending: true });

  const banners = (rows || []) as BannerRow[];
  const stats = await loadStats();

  return (
    <main className="mx-auto max-w-6xl px-6 py-10 text-[#e5e7eb]">
      <header className="mb-8 border-b border-[#222] pb-4 flex items-center justify-between">
        <div>
          <h1 className="text-3xl font-bold tracking-tight">Banner creatives</h1>
          <p className="text-sm text-[#9ca3af] mt-1">
            {banners.length} banners · live data from bb.banner_creatives.
            Stats roll forward in real time from bb.ad_impressions /
            bb.ad_clicks. Renderer cache TTL is 5 min — edits surface
            after the next refresh.
          </p>
        </div>
        <Link href="/admin" className="text-sm text-[#1D4ED8] hover:underline">
          ← Admin home
        </Link>
      </header>

      <BannerRows banners={banners} stats={stats} />
    </main>
  );
}
