import React from 'react';

export type PaymentMethodItem = {
  name: string;
  icon_url?: string;
};

export const DEFAULT_PAYMENT_METHODS: PaymentMethodItem[] = [
  { name: 'Visa' },
  { name: 'Mastercard' },
  { name: 'RuPay' },
  { name: 'UPI' },
  { name: 'Razorpay' },
];

function methodKey(name?: string): string {
  return String(name || '')
    .toLowerCase()
    .replace(/[^a-z0-9]+/g, '');
}

const shell =
  'h-8 min-w-[52px] px-2 rounded border border-gray-200 bg-white flex items-center justify-center shadow-[0_1px_2px_rgba(15,23,42,0.04)] select-none';

function VisaMark() {
  return (
    <div className={shell} title="Visa">
      <svg width="38" height="14" viewBox="0 0 48 16" aria-hidden>
        <text
          x="0"
          y="13"
          fontSize="13"
          fontWeight="800"
          fontStyle="italic"
          fontFamily="Arial, Helvetica, sans-serif"
          fill="#1A1F71"
        >
          VISA
        </text>
      </svg>
    </div>
  );
}

function MastercardMark() {
  return (
    <div className={`${shell} gap-1.5`} title="Mastercard">
      <span className="relative w-[22px] h-[14px]" aria-hidden>
        <span className="absolute left-0 top-0.5 w-[14px] h-[14px] rounded-full bg-[#EB001B]" />
        <span className="absolute right-0 top-0.5 w-[14px] h-[14px] rounded-full bg-[#F79E1B]" />
      </span>
    </div>
  );
}

function RuPayMark() {
  return (
    <div className={shell} title="RuPay">
      <svg width="44" height="14" viewBox="0 0 54 16" aria-hidden>
        <text
          x="0"
          y="12.5"
          fontSize="12"
          fontWeight="800"
          fontFamily="Arial, Helvetica, sans-serif"
          fill="#0B5CAB"
        >
          RuPay
        </text>
      </svg>
    </div>
  );
}

function UpiMark() {
  return (
    <div className={shell} title="UPI">
      <svg width="36" height="16" viewBox="0 0 36 16" aria-hidden>
        <text
          x="1"
          y="12.5"
          fontSize="12"
          fontWeight="800"
          fontFamily="Arial, Helvetica, sans-serif"
          fill="#097939"
        >
          UPI
        </text>
      </svg>
    </div>
  );
}

function AmexMark() {
  return (
    <div className={`${shell} bg-[#0070CD] border-[#0070CD]`} title="American Express">
      <span className="text-[9px] font-extrabold tracking-wide text-white uppercase">
        AMEX
      </span>
    </div>
  );
}

function RazorpayMark() {
  return (
    <div className={shell} title="Razorpay">
      <span className="text-[10px] font-extrabold text-[#072654] tracking-tight">
        razor<span className="text-[#3395FF]">pay</span>
      </span>
    </div>
  );
}

function PaypalMark() {
  return (
    <div className={shell} title="PayPal">
      <span className="text-[11px] font-black italic text-[#003087]">PayPal</span>
    </div>
  );
}

function GpayMark() {
  return (
    <div className={shell} title="Google Pay">
      <span className="text-[10px] font-bold text-gray-700">GPay</span>
    </div>
  );
}

function PhonePeMark() {
  return (
    <div className={shell} title="PhonePe">
      <span className="text-[10px] font-extrabold text-[#5F259F]">PhonePe</span>
    </div>
  );
}

function PaytmMark() {
  return (
    <div className={shell} title="Paytm">
      <span className="text-[10px] font-extrabold text-[#00BAF2]">Paytm</span>
    </div>
  );
}

function NetBankingMark() {
  return (
    <div className={shell} title="Net banking">
      <span className="text-[9px] font-bold text-gray-700">NetBank</span>
    </div>
  );
}

function WalletMark() {
  return (
    <div className={shell} title="Wallets">
      <span className="text-[9px] font-bold text-gray-700">Wallet</span>
    </div>
  );
}

function TextMark({ name }: { name: string }) {
  return (
    <div className={shell} title={name}>
      <span className="text-[10px] font-bold text-gray-700 max-w-[72px] truncate">
        {name}
      </span>
    </div>
  );
}

export function PaymentMethodBadge({ name }: { name: string }) {
  const key = methodKey(name);
  if (key.includes('visa')) return <VisaMark />;
  if (key.includes('master') || key.includes('maestro')) return <MastercardMark />;
  if (key.includes('rupay')) return <RuPayMark />;
  if (key === 'upi' || key.includes('bhim')) return <UpiMark />;
  if (key.includes('amex') || key.includes('americanexpress')) return <AmexMark />;
  if (key.includes('razor')) return <RazorpayMark />;
  if (key.includes('paypal')) return <PaypalMark />;
  if (key.includes('gpay') || key.includes('googlepay')) return <GpayMark />;
  if (key.includes('phonepe')) return <PhonePeMark />;
  if (key.includes('paytm')) return <PaytmMark />;
  if (key.includes('netbank') || key.includes('netbanking')) return <NetBankingMark />;
  if (key.includes('wallet')) return <WalletMark />;
  return <TextMark name={name} />;
}

export function PaymentMethodBadges({
  methods,
  className = '',
}: {
  methods?: PaymentMethodItem[] | null;
  className?: string;
}) {
  const seen = new Set<string>();
  const list: PaymentMethodItem[] = [];
  const source =
    methods && methods.length > 0 ? methods : DEFAULT_PAYMENT_METHODS;

  for (const item of source) {
    const name = String(item?.name || '').trim();
    if (!name) continue;
    const key = methodKey(name);
    if (seen.has(key)) continue;
    seen.add(key);
    list.push({ name });
  }

  if (list.length === 0) {
    DEFAULT_PAYMENT_METHODS.forEach((item) => list.push(item));
  }

  return (
    <div className={`flex items-center gap-2 flex-wrap ${className}`}>
      {list.map((pm) => (
        <PaymentMethodBadge key={methodKey(pm.name)} name={pm.name} />
      ))}
    </div>
  );
}