import { pool } from "@/lib/db";
import StopEditForm from "@/components/admin/StopEditForm";
import StopProductAssignment from "@/components/admin/StopProductAssignment";
import MessageCustomersSection from "@/components/admin/MessageCustomersSection";
import { getAdminUser } from "@/lib/admin-permissions";
import AdminAccessDenied from "@/components/admin/AdminAccessDenied";
import { PageHeader } from "@/components/admin/design-system";
import { redirect } from "next/navigation";
import Link from "next/link";

const StopIcon = () => (
  <svg className="h-5 w-5 sm:h-6 sm:w-6 text-current" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
    <path d="M20 10c0 6-8 12-8 12s-8-6-8-12a8 8 0 0 1 16 0Z"/>
    <circle cx="12" cy="10" r="3"/>
  </svg>
);

type StopDetailPageProps = {
  params: Promise<{
    id: string;
  }>;
};

interface Stop {
  id: string;
  brand_id: string;
  city: string;
  state: string;
  address: string | null;
  zip: string | null;
  date: string;
  time: string;
  cutoff_date: string | null;
  cutoff_time: string | null;
  status: string;
  location: string;
  active: boolean;
  brands?: { name: string; slug: string };
}

interface Product {
  id: string;
  name: string;
  type: string;
  price: number;
  image_url?: string | null;
}

interface ProductStop {
  id: string;
  product_id: string;
  products?: Product;
}

export default async function StopDetailPage({ params }: StopDetailPageProps) {
  const { id } = await params;

  const adminUser = await getAdminUser();

  if (!adminUser) {
    return <AdminAccessDenied />;
  }

  if (!adminUser.can_manage_stops) redirect("/admin/pickup");

  // Fetch stop
  const { rows: stopsRows } = await pool.query<Stop & { brand_name: string; brand_slug: string }>(
    `SELECT s.*, b.name as brand_name, b.slug as brand_slug
     FROM stops s
     LEFT JOIN brands b ON b.id = s.brand_id
     WHERE s.id = $1
     LIMIT 1`,
    [id]
  );
  const stopRow = stopsRows[0];

  if (!stopRow) {
    return (
      <main className="min-h-screen bg-[var(--admin-bg)]">
        <div className="px-4 sm:px-6 md:px-8 py-6 sm:py-8">
          <div className="mx-auto max-w-4xl">
            <p className="ha-eyebrow mb-2">Operations</p>
            <PageHeader
              title="Stop not found"
              subtitle="This stop may have been removed or you don't have access."
              icon={<StopIcon />}
            />
            <div className="rounded-2xl border border-[var(--admin-border)] bg-white p-5">
              <pre className="rounded-xl bg-[var(--admin-bg-subtle)] border border-[var(--admin-border-light)] p-4 text-sm text-[var(--admin-text-secondary)] overflow-auto">
                {id}
              </pre>
              <Link
                href="/admin/stops"
                className="ha-btn-ghost mt-4 inline-flex"
              >
                <svg className="h-3.5 w-3.5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={2.2}>
                  <path strokeLinecap="round" strokeLinejoin="round" d="M15 19l-7-7 7-7" />
                </svg>
                Back to Stops
              </Link>
            </div>
          </div>
        </div>
      </main>
    );
  }

  if (adminUser.brand_id && stopRow.brand_id !== adminUser.brand_id) {
    return <AdminAccessDenied />;
  }

  const stop: Stop = {
    id: stopRow.id,
    brand_id: stopRow.brand_id,
    city: stopRow.city ?? "",
    state: stopRow.state ?? "",
    address: stopRow.address ?? null,
    zip: stopRow.zip ?? null,
    date: stopRow.date ? String(stopRow.date) : "",
    time: stopRow.time ?? "",
    cutoff_date: stopRow.cutoff_date ? String(stopRow.cutoff_date) : null,
    cutoff_time: stopRow.cutoff_date ? String(stopRow.cutoff_date) : null,
    status: stopRow.status ?? "active",
    location: stopRow.location ?? "",
    active: stopRow.status === "active",
    brands: { name: stopRow.brand_name ?? "", slug: stopRow.brand_slug ?? "" },
  };

  // Fetch all products for this brand
  const { rows: productRows } = await pool.query<{ id: string; name: string; type: string; price: number; image_url: string | null }>(
    `SELECT id, name, type, price, image_url
     FROM products
     WHERE brand_id = $1 AND active = true
     ORDER BY name`,
    [stop.brand_id]
  );

  // Fetch product-stop assignments
  const { rows: productStopRows } = await pool.query<{ id: string; product_id: string; name: string; type: string; price: number; image_url: string | null }>(
    `SELECT ps.id, ps.product_id, p.name, p.type, p.price, p.image_url
     FROM product_stops ps
     JOIN products p ON p.id = ps.product_id
     WHERE ps.stop_id = $1`,
    [id]
  );

  // Fetch brands list
  const { rows: brandRows } = await pool.query<{ id: string; name: string; slug: string }>(
    `SELECT id, name, slug FROM brands ORDER BY name`
  );

  const allProducts = productRows.map((p) => ({
    id: p.id,
    name: p.name,
    type: p.type,
    price: Number(p.price),
    image_url: p.image_url,
  }));

  const assignedProducts = productStopRows.map((ps) => ({
    id: ps.id,
    product_id: ps.product_id,
    products: {
      name: ps.name,
      type: ps.type,
      price: Number(ps.price),
      image_url: ps.image_url,
    },
  }));

  const detailSubtitle = stop.brands?.name
    ? `${stop.brands.name} · ${stop.location}`
    : stop.location;

  return (
    <main className="min-h-screen bg-[var(--admin-bg)]">
      <div className="px-4 sm:px-6 md:px-8 pt-4 sm:pt-6">
        <p className="ha-eyebrow mb-2">Operations</p>
        <PageHeader
          title={`${stop.city}, ${stop.state}`}
          subtitle={detailSubtitle}
          icon={<StopIcon />}
        />
      </div>

      <div className="px-4 sm:px-6 md:px-8 pb-8 sm:pb-10">
        <div className="mx-auto max-w-4xl">
          <Link
            href="/admin/stops"
            className="ha-btn-ghost mb-4 inline-flex"
          >
            <svg className="h-3.5 w-3.5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={2.2}>
              <path strokeLinecap="round" strokeLinejoin="round" d="M15 19l-7-7 7-7" />
            </svg>
            Back to Stops
          </Link>

          <div className="rounded-2xl bg-white p-8 border border-[var(--admin-border)] shadow-sm">
            <div className="flex items-start justify-between">
              <div>
                <p className="text-sm font-semibold uppercase tracking-wide text-[var(--admin-text-muted)]">
                  {stop.brands?.name}
                </p>
                <h1 className="mt-2 text-4xl font-bold text-[var(--admin-text-primary)]">
                  {stop.city}, {stop.state}
                </h1>
                <p className="mt-2 text-lg text-[var(--admin-text-secondary)]">{stop.location}</p>
              </div>

              <span
                className={`shrink-0 rounded-full px-4 py-2 text-sm font-medium ${
                  stop.active
                    ? "bg-[var(--admin-success-soft)] text-[var(--admin-success)] border border-[var(--admin-success)]/30"
                    : "bg-[var(--admin-bg-subtle)] text-[var(--admin-text-muted)] border border-[var(--admin-border)]"
                }`}
              >
                {stop.active ? "Active" : "Inactive"}
              </span>
            </div>

            <div className="mt-8 grid grid-cols-2 gap-6">
              <div>
                <p className="text-sm font-medium text-[var(--admin-text-muted)]">Date</p>
                <p className="mt-1 text-lg font-semibold text-[var(--admin-text-primary)]">
                  {stop.date}
                </p>
              </div>
              <div>
                <p className="text-sm font-medium text-[var(--admin-text-muted)]">Time</p>
                <p className="mt-1 text-lg font-semibold text-[var(--admin-text-primary)]">
                  {stop.time}
                </p>
              </div>
              {stop.address && (
                <div>
                  <p className="text-sm font-medium text-[var(--admin-text-muted)]">Address</p>
                  <p className="mt-1 text-lg font-semibold text-[var(--admin-text-primary)]">
                    {stop.address}
                    {stop.zip ? `, ${stop.zip}` : ""}
                  </p>
                </div>
              )}
              {stop.cutoff_date && (
                <div>
                  <p className="text-sm font-medium text-[var(--admin-text-muted)]">Cutoff</p>
                  <p className="mt-1 text-lg font-semibold text-[var(--admin-text-primary)]">
                    {new Date(stop.cutoff_date + "T00:00:00").toLocaleDateString()}
                  </p>
                </div>
              )}
            </div>
          </div>

          <div className="mt-4 flex justify-end">
            <a
              href={`/admin/stops/new?duplicate=${stop.id}`}
              className="ha-btn-ghost"
            >
              Duplicate Stop
            </a>
          </div>

          <div className="mt-6 rounded-2xl bg-white p-8 border border-[var(--admin-border)] shadow-sm">
            <h2 className="text-2xl font-bold text-[var(--admin-text-primary)]">
              Assigned Products
            </h2>
            <p className="mt-1 text-[var(--admin-text-secondary)]">
              Manage which products are available at this stop.
            </p>

            <div className="mt-6">
              <StopProductAssignment
                stopId={stop.id}
                allProducts={allProducts}
                assignedProducts={assignedProducts}
                callerUid={adminUser.user_id}
              />
            </div>
          </div>

          <div className="mt-6 rounded-2xl bg-white p-8 border border-[var(--admin-border)] shadow-sm">
            <h2 className="text-2xl font-bold text-[var(--admin-text-primary)]">Edit Stop</h2>
            <p className="mt-1 text-[var(--admin-text-secondary)]">
              Update stop details, location, and availability.
            </p>

            <div className="mt-6">
              <StopEditForm
                stop={{
                  id: stop.id,
                  city: stop.city,
                  state: stop.state,
                  date: stop.date,
                  time: stop.time,
                  location: stop.location,
                  slug: stop.brands?.slug ?? "",
                  active: stop.active,
                  brand_id: stop.brand_id,
                  address: stop.address,
                  zip: stop.zip,
                  cutoff_time: stop.cutoff_time,
                }}
                brands={brandRows ?? []}
              />
            </div>
          </div>

          {/* Message Customers */}
          <div className="mt-6 rounded-2xl bg-white p-8 border border-[var(--admin-border)] shadow-sm">
            <h2 className="text-2xl font-bold text-[var(--admin-text-primary)]">Message Customers</h2>
            <p className="mt-1 text-[var(--admin-text-secondary)]">
              Send updates to customers with pending pickups at this stop.
            </p>

            <div className="mt-6">
              <MessageCustomersSection stopId={stop.id} brandId={stop.brand_id} />
            </div>
          </div>
        </div>
      </div>
    </main>
  );
}