import { createResource, Show, For } from "solid-js";
import { A } from "@solidjs/router";
import DashboardLayout from "~/components/DashboardLayout";
import { api } from "~/lib/api";

interface InvoiceSummary {
  id: string;
  invoice_number: string;
  payment_id: string;
  status: string;
  currency: string;
  subtotal: number;
  cgst_amount: number;
  sgst_amount: number;
  igst_amount: number;
  total: number;
  issued_at: string;
  paid_at: string | null;
  pdf_object_key: string | null;
  package_name: string | null;
}

interface InvoicesResponse {
  invoices: InvoiceSummary[];
  page: number;
  limit: number;
}

export default function InvoicesPage() {
  const [data] = createResource(async () => {
    const res = await api.get<InvoicesResponse>("/wallet/me/invoices");
    return res.data;
  });

  const formatDate = (date: string) => {
    return new Date(date).toLocaleDateString("en-IN", {
      day: "numeric",
      month: "short",
      year: "numeric",
    });
  };

  const formatPrice = (paise: number) => {
    return new Intl.NumberFormat("en-IN", {
      style: "currency",
      currency: "INR",
      minimumFractionDigits: 0,
    }).format(paise / 100);
  };

  return (
    <DashboardLayout>
      <div class="p-6 max-w-5xl mx-auto">
        <h1 class="text-2xl font-bold mb-2">Invoices</h1>
        <p class="text-gray-600 mb-6">All your Tracecoin purchase invoices</p>

        <Show when={data.loading}>
          <div class="text-center py-12">
            <div class="animate-spin w-8 h-8 border-2 border-orange-500 border-t-transparent rounded-full mx-auto mb-4" />
            <p class="text-gray-500">Loading invoices...</p>
          </div>
        </Show>

        <Show when={data()} keyed>
          {(d) => (
            <Show
              when={d.invoices.length > 0}
              fallback={
                <div class="bg-white border rounded-xl p-12 text-center">
                  <p class="text-gray-500 text-lg">No invoices yet.</p>
                  <p class="text-gray-400 text-sm mt-2">
                    Invoices are generated automatically when you purchase a Tracecoin package.
                  </p>
                </div>
              }
            >
              <div class="bg-white border rounded-xl overflow-hidden">
                <table class="w-full text-sm">
                  <thead>
                    <tr class="text-left text-xs uppercase text-gray-500 border-b bg-gray-50">
                      <th class="px-4 py-3">Invoice #</th>
                      <th class="px-4 py-3">Package</th>
                      <th class="px-4 py-3">Date</th>
                      <th class="px-4 py-3 text-right">Total</th>
                      <th class="px-4 py-3">Status</th>
                      <th class="px-4 py-3"></th>
                    </tr>
                  </thead>
                  <tbody>
                    <For each={d.invoices}>
                      {(inv) => (
                        <tr class="border-b hover:bg-gray-50">
                          <td class="px-4 py-3 font-mono text-sm">{inv.invoice_number}</td>
                          <td class="px-4 py-3">{inv.package_name ?? "Tracecoin purchase"}</td>
                          <td class="px-4 py-3 text-gray-600">{formatDate(inv.issued_at)}</td>
                          <td class="px-4 py-3 text-right font-medium">
                            {formatPrice(inv.total)}
                          </td>
                          <td class="px-4 py-3">
                            <span
                              class={`inline-block px-2 py-1 rounded-full text-xs font-medium ${
                                inv.status === "PAID"
                                  ? "bg-green-100 text-green-700"
                                  : inv.status === "ISSUED"
                                  ? "bg-blue-100 text-blue-700"
                                  : inv.status === "VOID"
                                  ? "bg-red-100 text-red-700"
                                  : "bg-gray-100 text-gray-700"
                              }`}
                            >
                              {inv.status}
                            </span>
                          </td>
                          <td class="px-4 py-3 text-right">
                            <A
                              href={`/dashboard/wallet/invoices/${inv.id}`}
                              class="text-orange-600 hover:underline text-sm"
                            >
                              View →
                            </A>
                          </td>
                        </tr>
                      )}
                    </For>
                  </tbody>
                </table>
              </div>
            </Show>
          )}
        </Show>
      </div>
    </DashboardLayout>
  );
}