import { useState } from "react";
import { motion, AnimatePresence } from "motion/react";
import { Plus } from "lucide-react";
import ScrollReveal from "@/components/ui/ScrollReveal";
import Button from "@/components/ui/Button";
import TextAnimation from "@/components/ui/TextAnimation";
import { cls } from "@/lib/utils";

type FaqItem = {
  question: string;
  answer: string;
};

const FaqTwoColumn = ({
  tag,
  title,
  description,
  primaryButton,
  secondaryButton,
  items,
}: {
  tag: string;
  title: string;
  description: string;
  primaryButton?: { text: string; href: string };
  secondaryButton?: { text: string; href: string };
  items: FaqItem[];
}) => {
  const [activeIndex, setActiveIndex] = useState<number | null>(null);

  const handleToggle = (index: number) => {
    setActiveIndex(activeIndex === index ? null : index);
  };

  const halfLength = Math.ceil(items.length / 2);
  const firstColumn = items.slice(0, halfLength);
  const secondColumn = items.slice(halfLength);

  const renderAccordionItem = (item: FaqItem, index: number) => (
    <div
      key={index}
      onClick={() => handleToggle(index)}
      className="p-3 xl:p-3.5 2xl:p-4 rounded card cursor-pointer select-none"
    >
      <div className="flex items-center justify-between gap-3 xl:gap-3.5 2xl:gap-4">
        <h3 className="text-lg md:text-xl font-medium leading-snug">{item.question}</h3>
        <div className="flex shrink-0 items-center justify-center size-8 md:size-9 rounded primary-button">
          <Plus
            className={cls(
              "size-3.5 md:size-4 text-primary-cta-text transition-transform duration-300",
              activeIndex === index && "rotate-45"
            )}
            strokeWidth={2}
          />
        </div>
      </div>
      <AnimatePresence initial={false}>
        {activeIndex === index && (
          <motion.div
            initial={{ height: 0, opacity: 0 }}
            animate={{ height: "auto", opacity: 1 }}
            exit={{ height: 0, opacity: 0 }}
            transition={{ duration: 0.3, ease: "easeOut" }}
            className="overflow-hidden"
          >
            <p className="pt-1 text-base leading-snug">{item.answer}</p>
          </motion.div>
        )}
      </AnimatePresence>
    </div>
  );

  return (
    <section aria-label="FAQ section" className="py-20">
      <div className="w-content-width mx-auto flex flex-col gap-8 md:gap-10">
        <div className="flex flex-col items-center gap-2">
          <div className="px-3 py-1 mb-1 text-sm card rounded w-fit">
            <p>{tag}</p>
          </div>

          <TextAnimation
            text={title}
            variant="slide-up"
            gradientText={true}
            tag="h2"
            className="md:max-w-8/10 text-6xl 2xl:text-7xl leading-[1.15] font-semibold text-center text-balance"
          />

          <TextAnimation
            text={description}
            variant="slide-up"
            gradientText={false}
            tag="p"
            className="md:max-w-7/10 text-lg md:text-xl leading-snug text-center text-balance"
          />

          {(primaryButton || secondaryButton) && (
            <div className="flex flex-wrap justify-center gap-3 mt-2 md:mt-3">
              {primaryButton && <Button text={primaryButton.text} href={primaryButton.href} variant="primary"/>}
              {secondaryButton && <Button text={secondaryButton.text} href={secondaryButton.href} variant="secondary"animationDelay={0.1} />}
            </div>
          )}
        </div>

        <ScrollReveal variant="slide-up" className="card rounded p-6 xl:p-10">
          <div className="flex flex-col md:flex-row gap-3 xl:gap-3.5 2xl:gap-4">
            <div className="flex flex-1 flex-col gap-3 xl:gap-3.5 2xl:gap-4">
              {firstColumn.map((item, index) => renderAccordionItem(item, index))}
            </div>
            {secondColumn.length > 0 && (
              <div className="flex flex-1 flex-col gap-3 xl:gap-3.5 2xl:gap-4">
                {secondColumn.map((item, index) => renderAccordionItem(item, index + halfLength))}
              </div>
            )}
          </div>
        </ScrollReveal>
      </div>
    </section>
  );
};

export default FaqTwoColumn;
