"use client";

import { useState, useRef } from "react";
import { CreditCard, Building2, ScrollText, Crown, Sparkles } from "lucide-react";
import { SectionHeading } from "@/components/ui/SectionHeading";
import { Reveal } from "@/components/ui/Reveal";
import type { SiteContent } from "@/types/content";

type Tab = "prices" | "rental" | "rules";

interface PricingProps {
  data: SiteContent["pricing"];
}

export function Pricing({ data: pricing }: PricingProps) {
  if (!pricing?.items) return null;
  const [activeTab, setActiveTab] = useState<Tab>("prices");
  const tabRefs = useRef<(HTMLButtonElement | null)[]>([]);
  const tabs: { id: Tab; label: string; icon: React.ReactNode }[] = [
    { id: "prices", label: "Абонементы", icon: <CreditCard size={16} /> },
    { id: "rental", label: "Аренда зала", icon: <Building2 size={16} /> },
    { id: "rules", label: "Правила", icon: <ScrollText size={16} /> },
  ];

  function handleTabKeyDown(e: React.KeyboardEvent, index: number) {
    let nextIndex: number | null = null;
    if (e.key === "ArrowRight") {
      nextIndex = (index + 1) % tabs.length;
    } else if (e.key === "ArrowLeft") {
      nextIndex = (index - 1 + tabs.length) % tabs.length;
    }
    if (nextIndex !== null) {
      e.preventDefault();
      setActiveTab(tabs[nextIndex].id);
      tabRefs.current[nextIndex]?.focus();
    }
  }

  // Split items: featured (big card) vs regular
  const featuredItem = pricing.items.find((item) => item.featured);
  const regularItems = pricing.items.filter((item) => !item.featured);

  return (
    <section id="pricing" className="section-glow relative section-padding bg-neutral-50 dark:bg-neutral-950">
      <div className="section-divider absolute top-0 left-0 right-0" />
      <div className="section-container">
        <Reveal>
          <SectionHeading centered>{pricing.title}</SectionHeading>
        </Reveal>

        {/* Tabs */}
        <Reveal>
          <div role="tablist" aria-label="Разделы цен" className="mt-12 flex flex-wrap justify-center gap-2">
            {tabs.map((tab, index) => (
              <button
                key={tab.id}
                ref={(el) => { tabRefs.current[index] = el; }}
                role="tab"
                aria-selected={activeTab === tab.id}
                aria-controls={`tabpanel-${tab.id}`}
                id={`tab-${tab.id}`}
                tabIndex={activeTab === tab.id ? 0 : -1}
                onClick={() => setActiveTab(tab.id)}
                onKeyDown={(e) => handleTabKeyDown(e, index)}
                className={`inline-flex items-center gap-2 rounded-full px-6 py-2.5 text-sm font-medium transition-all duration-300 cursor-pointer ${
                  activeTab === tab.id
                    ? "bg-gold text-black shadow-lg shadow-gold/25"
                    : "bg-white border border-neutral-300 text-neutral-600 hover:bg-neutral-50 hover:border-neutral-400 dark:border-transparent dark:bg-white/[0.06] dark:text-neutral-300 dark:hover:bg-white/[0.1]"
                }`}
              >
                {tab.icon}
                {tab.label}
              </button>
            ))}
          </div>
        </Reveal>

        {/* Prices tab */}
        <div id="tabpanel-prices" role="tabpanel" aria-labelledby="tab-prices" className={activeTab === "prices" ? "block" : "hidden"}>
          <div className="mx-auto mt-10 max-w-4xl">
            <p className="mb-8 text-center text-sm text-neutral-500 dark:text-neutral-400">
              {pricing.subtitle}
            </p>

            {/* Cards grid */}
            <div className="grid grid-cols-1 gap-3 sm:grid-cols-2 lg:grid-cols-3">
              {regularItems.map((item, i) => {
                const isPopular = item.popular ?? false;
                return (
                  <div
                    key={i}
                    className={`group relative rounded-2xl border p-5 transition-all duration-300 ${
                      isPopular
                        ? "border-gold/40 bg-gradient-to-br from-gold/10 via-transparent to-gold/5 dark:from-gold/[0.07] dark:to-gold/[0.02] shadow-lg shadow-gold/10"
                        : "border-neutral-200 bg-white shadow-sm shadow-gold/[0.04] hover:shadow-md hover:shadow-gold/[0.08] dark:border-white/[0.08] dark:bg-white/[0.03] dark:backdrop-blur-md dark:shadow-none dark:hover:border-white/[0.15] dark:hover:shadow-[0_0_20px_rgba(201,169,110,0.05)]"
                    }`}
                  >
                    {/* Popular badge */}
                    {isPopular && (
                      <div className="absolute -top-3 left-1/2 -translate-x-1/2">
                        <span className="inline-flex items-center gap-1 rounded-full bg-gold px-3 py-1 text-[10px] font-bold uppercase tracking-wider text-black shadow-md shadow-gold/30">
                          <Sparkles size={10} />
                          Популярный
                        </span>
                      </div>
                    )}

                    <div className={isPopular ? "mt-1" : ""}>
                      {/* Name */}
                      <p className={`text-sm font-medium ${isPopular ? "text-gold-dark dark:text-gold-light" : "text-neutral-700 dark:text-neutral-300"}`}>
                        {item.name}
                      </p>

                      {/* Note */}
                      {item.note && (
                        <p className="mt-1 text-xs text-neutral-500 dark:text-neutral-500">
                          {item.note}
                        </p>
                      )}

                      {/* Price */}
                      <p className={`mt-3 font-display text-xl sm:text-2xl font-bold ${isPopular ? "text-gold" : "text-neutral-900 dark:text-white"}`}>
                        {item.price}
                      </p>
                    </div>
                  </div>
                );
              })}
            </div>

            {/* Featured — big card */}
            {featuredItem && (
              <div className="mt-6 w-full team-card-glitter rounded-2xl border border-gold/30 bg-gradient-to-r from-gold/10 via-gold/5 to-gold/10 dark:from-gold/[0.06] dark:via-transparent dark:to-gold/[0.06] p-6 sm:p-8">
                <div className="flex flex-col items-center gap-4 sm:flex-row sm:justify-between">
                  <div className="text-center sm:text-left">
                    <div className="flex items-center justify-center gap-2 sm:justify-start">
                      <Crown size={18} className="text-gold" />
                      <p className="text-lg font-bold text-neutral-900 dark:text-white">
                        {featuredItem.name}
                      </p>
                    </div>
                    {featuredItem.note && (
                      <p className="mt-1 text-sm text-neutral-500 dark:text-neutral-400">
                        {featuredItem.note}
                      </p>
                    )}
                  </div>
                  <p className="shrink-0 font-display text-2xl sm:text-3xl font-bold text-gold">
                    {featuredItem.price}
                  </p>
                </div>
              </div>
            )}
          </div>
        </div>

        {/* Rental tab */}
        <div id="tabpanel-rental" role="tabpanel" aria-labelledby="tab-rental" className={activeTab === "rental" ? "block" : "hidden"}>
          {pricing.rentalSubtitle && (
            <p className="mx-auto mt-6 max-w-2xl text-center text-sm text-neutral-500 dark:text-neutral-400">
              {pricing.rentalSubtitle}
            </p>
          )}
          <div className="mx-auto mt-10 max-w-2xl space-y-3">
            {pricing.rentalItems.map((item, i) => (
              <div
                key={i}
                className="flex items-center justify-between gap-4 rounded-2xl border border-neutral-200 bg-white px-6 py-5 dark:border-white/[0.06] dark:bg-neutral-950"
              >
                <div>
                  <p className="font-medium text-neutral-900 dark:text-white">
                    {item.name}
                  </p>
                  {item.note && (
                    <p className="mt-0.5 text-sm text-neutral-500 dark:text-neutral-400">
                      {item.note}
                    </p>
                  )}
                </div>
                <span className="shrink-0 font-display text-xl font-bold text-gold-dark dark:text-gold-light">
                  {item.price}
                </span>
              </div>
            ))}
          </div>
        </div>

        {/* Rules tab */}
        <div id="tabpanel-rules" role="tabpanel" aria-labelledby="tab-rules" className={activeTab === "rules" ? "block" : "hidden"}>
          <div className="mx-auto mt-10 max-w-2xl space-y-3">
            {pricing.rules.map((rule, i) => (
              <div
                key={i}
                className="flex gap-4 rounded-2xl border border-neutral-200 bg-white px-5 py-4 dark:border-white/[0.06] dark:bg-neutral-950"
              >
                <span className="mt-0.5 flex h-6 w-6 shrink-0 items-center justify-center rounded-full bg-gold/10 text-xs font-bold text-gold-dark dark:bg-gold/10 dark:text-gold-light">
                  {i + 1}
                </span>
                <p className="text-sm leading-relaxed text-neutral-700 dark:text-neutral-300">
                  {rule}
                </p>
              </div>
            ))}
          </div>
        </div>
      </div>
    </section>
  );
}