"use client";

import Image from "next/image";

import type { PayChannel } from "@/data/schemas/payment";
import type { PaymentMethodConfig } from "@/lib/payment/payment_method";

const PAYMENT_METHODS: readonly {
  channel: PayChannel;
  title: string;
  logoSrc?: string;
}[] = [
  {
    channel: "stripe",
    title: "Stripe",
  },
  {
    channel: "ezpay",
    title: "GCash",
    logoSrc: "/images/subscription/gcash-logo.svg",
  },
];

export interface PaymentMethodSelectorProps {
  config: PaymentMethodConfig;
  value: PayChannel;
  density?: "default" | "compact";
  disabled?: boolean;
  caption?: string;
  className?: string;
  analyticsKey: string;
  onChange: (channel: PayChannel) => void;
}

export function PaymentMethodSelector({
  config,
  value,
  density = "default",
  disabled = false,
  caption = "Stripe by default",
  className,
  analyticsKey,
  onChange,
}: PaymentMethodSelectorProps) {
  if (!config.showPaymentMethodSelector) return null;
  const isCompact = density === "compact";
  const ezpayDisplayName = config.ezpayDisplayName ?? "GCash";
  const configuredPaymentMethods = PAYMENT_METHODS.map((method) =>
    method.channel === "ezpay"
      ? {
          ...method,
          title: ezpayDisplayName,
          logoSrc:
            ezpayDisplayName === "GCash" ? method.logoSrc : undefined,
        }
      : method,
  );

  const paymentMethods =
    config.initialPayChannel === "ezpay"
      ? [...configuredPaymentMethods].sort((a, b) =>
          a.channel === "ezpay" ? -1 : b.channel === "ezpay" ? 1 : 0,
        )
      : configuredPaymentMethods;

  return (
    <section
      className={`flex flex-col ${isCompact ? "gap-2" : "gap-[clamp(8px,1.852vw,10px)]"} ${className ?? ""}`.trim()}
      data-density={density}
      aria-labelledby="payment-method-title"
    >
      <div
        className={`flex items-baseline justify-between gap-sm ${isCompact ? "px-0.5" : "px-xs"}`}
      >
        <h2
          id="payment-method-title"
          className={`m-0 font-bold leading-[1.2] text-auth-text-primary ${isCompact ? "text-base" : "text-(length:--responsive-card-title,var(--font-size-lg))"}`}
          style={{ fontFamily: "var(--font-athelas), var(--font-system)" }}
        >
          Payment Method
        </h2>
        {!isCompact ? (
          <span className="whitespace-nowrap text-(length:--responsive-caption,var(--font-size-sm)) leading-[1.2] text-text-secondary">
            {caption}
          </span>
        ) : null}
      </div>
      <div className="grid grid-cols-2 gap-sm">
        {paymentMethods.map((method) => {
          const selected = method.channel === value;
          const classes = [
            `flex cursor-pointer items-center justify-center text-center font-[inherit] text-[#3c3b3b] transition-[border-color,box-shadow,transform] duration-150 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-accent active:enabled:scale-98 disabled:cursor-not-allowed disabled:opacity-72 ${isCompact ? "min-h-13 rounded-[18px] px-3 py-2" : "min-h-[clamp(54px,11.481vw,62px)] rounded-(--responsive-card-radius-sm,18px) px-[clamp(12px,2.593vw,14px)] py-[clamp(9px,1.852vw,10px)]"}`,
            selected
              ? "border-2 border-[#f657a0] bg-[#fff4f9] shadow-[0_8px_18px_rgba(217,47,127,0.24),0_0_0_3px_rgba(217,47,127,0.18)] -translate-y-0.5"
              : "border border-[rgba(246,87,160,0.18)] bg-white shadow-[0_5px_7px_0_rgba(247,89,168,0.08)]",
          ]
            .filter(Boolean)
            .join(" ");

          return (
            <button
              key={method.channel}
              type="button"
              data-analytics-key={analyticsKey}
              data-analytics-label="Select payment method"
              className={classes}
              disabled={disabled}
              aria-pressed={selected}
              aria-label={method.title}
              onClick={() => onChange(method.channel)}
            >
              {method.logoSrc ? (
                <Image
                  src={method.logoSrc}
                  alt=""
                  aria-hidden="true"
                  width={122}
                  height={29}
                  className={`block object-contain ${isCompact ? "max-h-8 w-[min(100%,92px)]" : "max-h-8.5 w-[min(100%,92px)]"}`}
                />
              ) : (
                <span className="text-(length:--responsive-body,16px) font-bold leading-[1.1] text-[#1e1e1e]">
                  {method.title}
                </span>
              )}
            </button>
          );
        })}
      </div>
    </section>
  );
}