"use client";

import { useState } from "react";
import Link from "next/link";
import { useParams } from "next/navigation";
import { LoadingCard, Skeleton } from "@/components/atoms/loading-skeleton";
import { ErrorState } from "@/components/atoms/error-state";
import { CheckCircleIcon, DocumentTextIcon } from "@heroicons/react/24/outline";
import { PageLayout } from "@/components/templates/PageLayout";
import { logger } from "@customer-portal/logging";
import { apiClient, getDataOrThrow } from "@/lib/api";
import { openSsoLink } from "@/features/billing/utils/sso";
import { useInvoice, useCreateInvoiceSsoLink } from "@/features/billing/hooks";
import type { InvoiceSsoLink } from "@customer-portal/domain/billing";
import {
  InvoiceItems,
  InvoiceTotals,
  InvoiceSummaryBar,
} from "@/features/billing/components/InvoiceDetail";

export function InvoiceDetailContainer() {
  const params = useParams();
  const [loadingDownload, setLoadingDownload] = useState(false);
  const [loadingPayment, setLoadingPayment] = useState(false);
  const [loadingPaymentMethods, setLoadingPaymentMethods] = useState(false);

  const rawInvoiceParam = params.id;
  const invoiceIdParam = Array.isArray(rawInvoiceParam) ? rawInvoiceParam[0] : rawInvoiceParam;
  const invoiceId = Number.parseInt(invoiceIdParam ?? "", 10);
  const createSsoLinkMutation = useCreateInvoiceSsoLink();
  const { data: invoice, isLoading, error } = useInvoice(invoiceIdParam ?? "");

  const handleCreateSsoLink = (target: "view" | "download" | "pay" = "view") => {
    void (async () => {
      if (!invoice) return;
      if (target === "download") setLoadingDownload(true);
      else setLoadingPayment(true);
      try {
        const ssoLink = await createSsoLinkMutation.mutateAsync({ invoiceId: invoice.id, target });
        if (target === "download") openSsoLink(ssoLink.url, { newTab: false });
        else openSsoLink(ssoLink.url, { newTab: true });
      } catch (err) {
        logger.error(err, "Failed to create SSO link");
      } finally {
        if (target === "download") setLoadingDownload(false);
        else setLoadingPayment(false);
      }
    })();
  };

  const handleManagePaymentMethods = () => {
    void (async () => {
      setLoadingPaymentMethods(true);
      try {
        const response = await apiClient.POST<InvoiceSsoLink>("/auth/sso-link", {
          body: { path: "index.php?rp=/account/paymentmethods" },
        });
        const sso = getDataOrThrow<InvoiceSsoLink>(
          response,
          "Failed to create payment methods SSO link"
        );
        openSsoLink(sso.url, { newTab: true });
      } catch (err) {
        logger.error(err, "Failed to create payment methods SSO link");
      } finally {
        setLoadingPaymentMethods(false);
      }
    })();
  };

  if (isLoading) {
    return (
      <PageLayout
        icon={<DocumentTextIcon />}
        title="Invoice"
        description="Invoice details and actions"
      >
        <div className="max-w-4xl mx-auto px-4 sm:px-6 md:px-8 space-y-6">
          <LoadingCard />
          <div className="bg-white rounded-2xl border p-6 space-y-4">
            <div className="flex items-center justify-between">
              <div className="space-y-2">
                <Skeleton className="h-5 w-40" />
                <Skeleton className="h-4 w-28" />
              </div>
              <div className="flex items-center gap-2">
                <Skeleton className="h-9 w-24" />
                <Skeleton className="h-9 w-28" />
              </div>
            </div>
            <div className="space-y-2">
              {Array.from({ length: 5 }).map((_, i) => (
                <div key={i} className="flex items-center justify-between">
                  <Skeleton className="h-4 w-64" />
                  <Skeleton className="h-4 w-24" />
                </div>
              ))}
            </div>
          </div>
        </div>
      </PageLayout>
    );
  }

  if (error || !invoice) {
    return (
      <PageLayout
        icon={<DocumentTextIcon />}
        title="Invoice"
        description="Invoice details and actions"
      >
        <ErrorState
          title="Error loading invoice"
          message={error instanceof Error ? error.message : "Invoice not found"}
          variant="page"
        />
        <div className="mt-4">
          <Link href="/billing/invoices" className="text-primary font-medium">
            ← Back to invoices
          </Link>
        </div>
      </PageLayout>
    );
  }

  return (
    <div className="min-h-screen bg-gradient-to-br from-slate-50 to-blue-50/30 py-8">
      <div className="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8">
        {/* Navigation */}
        <div className="mb-8">
          <Link
            href="/billing/invoices"
            className="inline-flex items-center gap-2 text-sm font-medium text-slate-600 hover:text-slate-900 transition-colors group"
          >
            <svg
              className="w-4 h-4 transition-transform group-hover:-translate-x-1"
              fill="none"
              stroke="currentColor"
              viewBox="0 0 24 24"
            >
              <path
                strokeLinecap="round"
                strokeLinejoin="round"
                strokeWidth={2}
                d="M15 19l-7-7 7-7"
              />
            </svg>
            Back to Invoices
          </Link>
        </div>

        {/* Main Invoice Card */}
        <div className="bg-white/80 backdrop-blur-sm rounded-3xl shadow-xl border border-white/20 overflow-hidden">
          <InvoiceSummaryBar
            invoice={invoice}
            loadingDownload={loadingDownload}
            loadingPayment={loadingPayment}
            onDownload={() => handleCreateSsoLink("download")}
            onPay={() => handleCreateSsoLink("pay")}
          />

          {/* Success Banner for Paid Invoices */}
          {invoice.status === "Paid" && (
            <div className="px-8 py-4 bg-gradient-to-r from-emerald-50 to-teal-50 border-b border-emerald-100">
              <div className="flex items-center gap-3">
                <div className="flex-shrink-0">
                  <CheckCircleIcon className="w-6 h-6 text-emerald-600" />
                </div>
                <div>
                  <h3 className="text-sm font-semibold text-emerald-900">Payment Received</h3>
                  <p className="text-sm text-emerald-700">
                    Paid on {invoice.paidDate || invoice.issuedAt}
                  </p>
                </div>
              </div>
            </div>
          )}

          {/* Content */}
          <div className="p-8">
            <div className="space-y-8">
              {/* Invoice Items */}
              <InvoiceItems items={invoice.items} currency={invoice.currency} />
              
              {/* Invoice Summary - Full Width */}
              <div className="border-t border-slate-200 pt-8">
                <InvoiceTotals
                  subtotal={invoice.subtotal}
                  tax={invoice.tax}
                  total={invoice.total}
                />
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}

export default InvoiceDetailContainer;