import type { Metadata } from "next";
import Link from "next/link";
import { redirect } from "next/navigation";
import { auth } from "@/auth";
import { TopNav } from "@/components/navigation/top-nav";
import { Card } from "@/components/ui/card";
import { readDraft } from "@/lib/booking-draft/cookie";
import { getPrimaryBusiness } from "@/lib/business/get-primary-business";
import { prisma } from "@/lib/db/prisma";
import { getLoyaltySummary } from "@/services/loyalty/loyalty.service";
import { ConfirmBookingButton } from "@/features/booking/components/confirm-booking-button";

export const metadata: Metadata = { title: "Review Booking" };
export const dynamic = "force-dynamic";

export default async function BookReviewPage() {
  const business = await getPrimaryBusiness();
  const draft = await readDraft(business.id);

  if (draft.serviceIds.length === 0) redirect("/book");
  if (!draft.startAt) redirect("/book/barber-time");

  const session = await auth();
  if (!session?.user && !draft.guest) redirect("/book/details");
  if (!draft.policyAcknowledged) redirect("/book/details");

  const [services, staff, customerProfile] = await Promise.all([
    prisma.service.findMany({ where: { id: { in: draft.serviceIds } } }),
    draft.staffId
      ? prisma.staffProfile.findUnique({
          where: { id: draft.staffId },
          include: { user: { select: { name: true } } },
        })
      : null,
    session?.user?.id
      ? prisma.customerProfile.findUnique({ where: { userId: session.user.id } })
      : null,
  ]);

  const totalDuration = services.reduce((sum, s) => sum + s.durationMinutes, 0);
  const totalPrice = services.reduce((sum, s) => sum + Number(s.price), 0);
  const startAt = new Date(draft.startAt);
  const endAt = new Date(startAt.getTime() + totalDuration * 60_000);

  const loyalty = customerProfile
    ? await getLoyaltySummary(prisma, { customerId: customerProfile.id, businessId: business.id })
    : null;

  const customerName = draft.guest
    ? `${draft.guest.firstName} ${draft.guest.lastName}`
    : `${customerProfile?.firstName ?? session?.user?.name ?? ""} ${customerProfile?.lastName ?? ""}`.trim();
  const customerEmail = draft.guest?.email ?? customerProfile?.email ?? session?.user?.email ?? "";
  const customerPhone = draft.guest?.phone ?? customerProfile?.phone ?? "";

  return (
    <div className="pb-12">
      <TopNav title="Review Booking" onBack={true} sticky className="bg-stone" />

      <main className="mx-auto max-w-2xl space-y-4 px-6 py-6">
        <Card className="space-y-6 p-6">
          <div className="hidden flex items-start justify-between">
            <span className="text-muted text-[10px] font-bold tracking-widest uppercase">
              Business
            </span>
            <Link
              href="/home"
              className="text-ink text-[10px] font-bold tracking-widest uppercase underline"
            >
              {business.name}
            </Link>
          </div>

          <div className="space-y-4 pt-2">
            <div className="flex items-center justify-between">
              <div>
                <span className="text-muted block text-[10px] font-bold tracking-widest uppercase">
                  Services
                </span>
                <ul className="mt-1 text-sm font-bold">
                  {services.map((s) => (
                    <li key={s.id}>{s.name}</li>
                  ))}
                </ul>
              </div>
              <Link
                href="/book"
                className="text-ink text-[10px] font-bold tracking-widest uppercase underline"
              >
                Edit
              </Link>
            </div>

            <div className="flex items-center justify-between">
              <div>
                <span className="text-muted block text-[10px] font-bold tracking-widest uppercase">
                  Barber
                </span>
                <p className="text-sm font-bold">{staff?.user.name ?? "Any available barber"}</p>
              </div>
              <Link
                href="/book/barber-time"
                className="text-ink text-[10px] font-bold tracking-widest uppercase underline"
              >
                Edit
              </Link>
            </div>

            <div className="flex items-center justify-between">
              <div>
                <span className="text-muted block text-[10px] font-bold tracking-widest uppercase">
                  Date &amp; Time
                </span>
                <p className="text-sm font-bold">
                  {startAt.toLocaleDateString("en-GB", {
                    weekday: "short",
                    day: "numeric",
                    month: "short",
                    timeZone: business.timezone,
                  })}
                  {" · "}
                  {startAt.toLocaleTimeString("en-GB", {
                    hour: "2-digit",
                    minute: "2-digit",
                    timeZone: business.timezone,
                  })}
                  {"–"}
                  {endAt.toLocaleTimeString("en-GB", {
                    hour: "2-digit",
                    minute: "2-digit",
                    timeZone: business.timezone,
                  })}
                </p>
              </div>
              <Link
                href="/book/barber-time"
                className="text-ink text-[10px] font-bold tracking-widest uppercase underline"
              >
                Edit
              </Link>
            </div>
          </div>

          <div className="border-line grid grid-cols-2 gap-6 border-t pt-6">
            <div>
              <span className="text-muted block text-[10px] font-bold tracking-widest uppercase">
                Duration
              </span>
              <p className="text-sm font-bold">{totalDuration} min</p>
            </div>
            <div className="text-right">
              <span className="text-muted block text-[10px] font-bold tracking-widest uppercase">
                Total
              </span>
              <p className="text-sm font-bold">£{totalPrice.toFixed(2)}</p>
            </div>
          </div>

          <div className="border-line border-t pt-6">
            <div className="flex items-center justify-between">
              <span className="text-muted block text-[10px] font-bold tracking-widest uppercase">
                Your Details
              </span>
              <Link
                href="/book/details"
                className="text-ink text-[10px] font-bold tracking-widest uppercase underline"
              >
                Edit
              </Link>
            </div>
            <p className="mt-1 text-sm font-bold">{customerName}</p>
            <p className="text-muted text-xs">
              {customerEmail}
              {customerPhone ? ` · ${customerPhone}` : ""}
            </p>
          </div>

          {loyalty?.availableReward && (
            <div className="border-line bg-accent-loyalty/10 rounded-lg border-t p-4">
              <p className="text-sm font-bold">You have a reward available</p>
              <p className="text-muted text-xs">
                Mention it to your barber at check-in — {loyalty.availableReward.label}.
              </p>
            </div>
          )}

          {draft.notes && (
            <div className="border-line border-t pt-6">
              <span className="text-muted block text-[10px] font-bold tracking-widest uppercase">
                Notes
              </span>
              <p className="text-muted mt-1 text-sm italic">{draft.notes}</p>
            </div>
          )}
        </Card>

        <ConfirmBookingButton businessId={business.id} />
      </main>
    </div>
  );
}