import { Link, useParams } from "@remix-run/react";
import { Loader2, ArrowRight, BadgeCheck } from "lucide-react";
import { useLedgerSellerDetail } from "~/requestHandler/use-admin-hooks";
import {
  AdminTable,
  StatusBadge,
  faToman,
  faNum,
  faDate,
  type Column,
} from "~/components/admin/DataTable";
import type { LedgerPayoutRow } from "~/requestHandler/use-admin-hooks";
import { cn } from "~/lib/utils";

const PAYOUT_STATUS: Record<string, { label: string; tone: "green" | "red" | "yellow" }> = {
  pending: { label: "در انتظار", tone: "yellow" },
  completed: { label: "پرداخت‌شده", tone: "green" },
  rejected: { label: "ردشده", tone: "red" },
};

function Stat({
  label,
  value,
  accent,
}: {
  label: string;
  value: string;
  accent?: "red" | "green";
}) {
  return (
    <div className="rounded-2xl border border-WHITE3 bg-WHITE p-4">
      <p className="text-[12px] text-GRAY">{label}</p>
      <p
        className={cn(
          "font-extrabold tabular-nums mt-1 text-[18px]",
          accent === "red" && "text-RED",
          accent === "green" && "text-GREEN"
        )}
      >
        {value}
      </p>
    </div>
  );
}

export default function LedgerSellerDetail() {
  const { id } = useParams();
  const { data, isLoading, isError } = useLedgerSellerDetail(id);

  if (isLoading)
    return (
      <div className="flex min-h-[40vh] items-center justify-center">
        <Loader2 className="h-7 w-7 animate-spin text-GRAY" />
      </div>
    );
  if (isError || !data)
    return <p className="text-RED text-[14px]">خطا در بارگذاری اطلاعات فروشنده</p>;

  const discrepant = Math.abs(data.discrepancy) > 1;

  const payoutColumns: Column<LedgerPayoutRow>[] = [
    { header: "مبلغ", render: (p) => <span className="tabular-nums whitespace-nowrap">{faToman(p.amount)}</span> },
    {
      header: "وضعیت",
      render: (p) => {
        const s = PAYOUT_STATUS[p.status] || { label: p.status, tone: "yellow" as const };
        return <StatusBadge label={s.label} tone={s.tone} />;
      },
    },
    { header: "درخواست", render: (p) => <span className="text-GRAY whitespace-nowrap">{faDate(p.requestedAt)}</span> },
    { header: "پرداخت", render: (p) => <span className="text-GRAY whitespace-nowrap">{faDate(p.processedAt)}</span> },
  ];

  return (
    <div>
      <div className="flex items-center gap-2 mb-4">
        <Link
          to="/admin/ledger/sellers"
          className="grid h-8 w-8 place-items-center rounded-lg border border-WHITE3 hover:bg-WHITE2"
        >
          <ArrowRight size={16} />
        </Link>
        <div>
          <h2 className="font-extrabold text-[18px]">{data.seller.storeName}</h2>
          <p className="text-GRAY text-[12px]" dir="ltr">
            @{data.seller.username} · کمیسیون {faNum(data.seller.platformFee)}٪
          </p>
        </div>
      </div>

      <div className="grid grid-cols-2 lg:grid-cols-3 gap-3">
        <Stat label="مانده ثبت‌شده" value={faToman(data.recordedBalance)} />
        <Stat label="محاسبه‌شده از سفارش‌ها" value={faToman(data.accruedFromOrders)} />
        <Stat label="مانده واقعی (تخمینی)" value={faToman(data.derivedBalance)} accent="green" />
        <Stat label="برداشت‌های پرداخت‌شده" value={faToman(data.completedPayouts)} />
        <Stat label="در انتظار برداشت" value={faToman(data.pendingPayouts)} />
        <Stat
          label="اختلاف"
          value={faToman(data.discrepancy)}
          accent={discrepant ? "red" : "green"}
        />
      </div>

      {discrepant && (
        <p className="mt-3 text-[12px] text-RED">
          مانده ثبت‌شده با مقدار محاسبه‌شده مغایرت دارد (به‌احتمال زیاد به‌دلیل عدم
          کسر برداشت‌های پرداخت‌شده از مانده).
        </p>
      )}

      {/* Bank accounts */}
      <h3 className="text-[15px] font-extrabold mt-7 mb-3">حساب‌های بانکی</h3>
      {data.bankAccounts.length === 0 ? (
        <p className="text-GRAY text-[13px]">حساب بانکی ثبت نشده است.</p>
      ) : (
        <div className="flex flex-col gap-2">
          {data.bankAccounts.map((b) => (
            <div
              key={b.id}
              className="rounded-xl border border-WHITE3 bg-WHITE p-3 flex items-center justify-between"
            >
              <div className="text-[13px]">
                <p className="font-semibold">{b.accountHolder}</p>
                <p className="text-GRAY text-[11px] tabular-nums" dir="ltr">
                  {b.iban} · {b.bankName}
                </p>
              </div>
              {b.isVerified ? (
                <span className="flex items-center gap-1 text-[12px] text-VITROWN_BLUE">
                  <BadgeCheck size={15} /> تأییدشده
                </span>
              ) : (
                <StatusBadge label="تأییدنشده" tone="gray" />
              )}
            </div>
          ))}
        </div>
      )}

      {/* Payout history */}
      <h3 className="text-[15px] font-extrabold mt-7 mb-3">تاریخچه برداشت</h3>
      <AdminTable
        columns={payoutColumns}
        rows={data.payouts}
        getRowKey={(p) => p.id}
        emptyText="برداشتی ثبت نشده است"
      />
    </div>
  );
}