"use client";

import type { MotionValue } from "framer-motion";
import {
  AnimatePresence,
  motion,
  useScroll,
  useTransform,
} from "framer-motion";
import React, { useEffect, useRef, useState } from "react";

import { cn } from "@/lib/utils";

const getAnimationRange = (index: number, totalFeatures: number) => {
  const cardPosition = index / totalFeatures;

  const range = [0, cardPosition, 1];

  return range;
};

interface Statistics {
  value: string;
  label: string;
}

interface Feature {
  id: string;
  title: string;
  subtitle: string;
  statistics: Statistics;
  visual: string;
}

interface Testimonial {
  quote: string;
  companyLogo: string;
  author: string;
  designation: string;
}

interface AnimationWrapperProps {
  children: React.ReactNode;
  delay?: number;
  className?: string;
  duration?: number;
}

const AnimationWrapper = ({
  children,
  delay = 0,
  className,
  duration = 0.3,
}: AnimationWrapperProps) => {
  return (
    <motion.div
      initial={{
        x: -10,
        opacity: 0,
      }}
      animate={{
        x: 0,
        opacity: 1,
      }}
      exit={{
        x: 10,
        opacity: 0,
      }}
      transition={{
        duration: duration,
        ease: "easeOut",
        delay: delay,
      }}
      className={className}
    >
      {children}
    </motion.div>
  );
};

interface TestimonialCardProps {
  testimonial: Testimonial;
}

const TestimonialCard = ({ testimonial }: TestimonialCardProps) => {
  return (
    <div className="hidden h-96 flex-1/2 shrink-0 flex-col items-start justify-end rounded-lg border bg-muted p-6 text-start sm:flex lg:h-full">
      <img
        src={testimonial.companyLogo}
        alt={testimonial.author}
        className="h-8 dark:invert"
      />
      <p className="mt-8 text-lg leading-tight text-pretty">
        «{testimonial.quote}»
      </p>
      <p className="mt-4 text-sm font-medium">
         {testimonial.author}{" "}
        <span className="font-light">{testimonial.designation}</span>
      </p>
    </div>
  );
};

interface ScrollProgressIndicatorProps {
  totalFeatures: number;
  activeIndex: number;
  scrollYProgress: MotionValue<number>;
}

const ScrollProgressIndicator = ({
  totalFeatures,
  activeIndex,
  scrollYProgress,
}: ScrollProgressIndicatorProps) => {
  const range = getAnimationRange(
    Math.max(0, activeIndex - 0.5),
    totalFeatures,
  );
  const nextRange = getAnimationRange(
    Math.min(totalFeatures, activeIndex + 0.5),
    totalFeatures,
  );

  const currentRange = [range[1], nextRange[1]];

  const width = useTransform(scrollYProgress, currentRange, ["0%", "100%"]);

  return (
    <div className="mt-14 hidden w-fit items-center justify-center gap-3 rounded-full bg-muted px-6 py-4 lg:flex">
      {Array.from({ length: totalFeatures }).map((_, index) => {
        return (
          <div
            key={`scroll-progress-indicator-${index}`}
            className={cn(
              "relative h-1.5 w-1.5 rounded-full bg-foreground/20",
              activeIndex === index && "w-10",
              activeIndex > index && "bg-foreground",
            )}
          >
            {activeIndex === index && (
              <motion.div
                style={{
                  width,
                }}
                className="absolute top-0 start-0 h-full rounded-full bg-foreground"
              />
            )}
          </div>
        );
      })}
    </div>
  );
};

interface FeatureCardProps {
  feature: Feature;
  index: number;
  testimonial: Testimonial;
  totalFeatures: number;
  scrollYProgress: MotionValue<number>;
}

const FeatureCard = ({
  feature,
  index,
  testimonial,
  totalFeatures,
  scrollYProgress,
}: FeatureCardProps) => {
  return (
    <div
      className={cn(
        "flex w-full flex-col-reverse justify-between gap-8 px-10 py-4 text-start lg:absolute lg:top-1/2 lg:start-1/2 lg:h-full lg:-translate-x-1/2 lg:-translate-y-1/2 lg:flex-row lg:items-center lg:border-s",
      )}
    >
      <div className="flex flex-2/5 flex-col gap-8 lg:h-full lg:gap-0">
        <div className="flex flex-col gap-1">
          <AnimationWrapper>
            <p className="text-xl font-semibold">{feature.title}</p>
          </AnimationWrapper>
          <AnimationWrapper delay={0.15}>
            <p className="font-light text-pretty">{feature.subtitle}</p>
          </AnimationWrapper>
        </div>

        <ScrollProgressIndicator
          totalFeatures={totalFeatures}
          activeIndex={index}
          scrollYProgress={scrollYProgress}
        />

        <div className="flex flex-col gap-1 lg:mt-auto">
          <AnimationWrapper delay={0.3}>
            <p className="text-2xll font-medium">{feature.statistics.value}</p>
          </AnimationWrapper>
          <AnimationWrapper delay={0.45}>
            <p className="text-sm font-light">{feature.statistics.label}</p>
          </AnimationWrapper>
        </div>
      </div>

      <AnimationWrapper
        duration={0.6}
        className="flex h-96 w-full flex-3/5 items-center gap-6 lg:h-full"
      >
        <img
          src={feature.visual}
          alt={feature.title}
          className={cn(
            "h-96 w-full overflow-hidden rounded-lg border object-cover lg:h-full",
            index === 0 && "flex-1/2",
          )}
        />

        {index === 0 && <TestimonialCard testimonial={testimonial} />}
      </AnimationWrapper>
    </div>
  );
};

interface Feature322Props {
  features?: Feature[];
  testimonial?: Testimonial;
  className?: string;
}

const DEFAULT_FEATURES: Feature[] = [
  {
    id: "performance",
    title: "طبقه‌بندی خودکار",
    subtitle: "درخواست‌ها را خودکار دسته‌بندی کنید و به تیم مناسب بفرستید.",
    statistics: {
      value: "اتوماسیون AI",
      label: "دستیار کسب‌وکار",
    },
    visual:
      "/block-media/shadcnblocks/block/photos/christopher-gower-vjMgqUkS8q8-unsplash.jpg",
  },
  {
    id: "security",
    title: "پیش‌بینی ریزش",
    subtitle: "مشتریان در معرض ریزش را زودتر شناسایی کنید.",
    statistics: {
      value: "هوش مصنوعی",
      label: "پیشنهاد هوشمند",
    },
    visual:
      "/block-media/shadcnblocks/block/photos/daniel-leone-g30P1zcOzXo-unsplash.jpg",
  },
  {
    id: "analytics",
    title: "جستجوی معنایی",
    subtitle: "متن‌های طولانی را در چند ثانیه به نکات کلیدی تبدیل کنید.",
    statistics: {
      value: "اتوماسیون AI",
      label: "دستیار کسب‌وکار",
    },
    visual:
      "/block-media/shadcnblocks/block/photos/jason-leung-6uoj7DL6BFk-unsplash.jpg",
  },
  {
    id: "integration",
    title: "تولید محتوا",
    subtitle: "بهترین پاسخ را بر اساس زمینه مکالمه پیشنهاد دهید.",
    statistics: {
      value: "هوش مصنوعی",
      label: "پیشنهاد هوشمند",
    },
    visual:
      "/block-media/shadcnblocks/block/photos/ivan-bandura-Kj2tYAl4HZg-unsplash.jpg",
  },
];

const DEFAULT_TESTIMONIAL: Testimonial = {
  quote:
    "مدل‌های هوشمند الگوهای پنهان در داده فروش و پشتیبانی را پیدا می‌کنند. تیم‌ها با پیشنهادهای عملی، سریع‌تر اقدام می‌کنند.",
  companyLogo:
    "/block-media/shadcnblocks/block/logos/company/fictional-company-logo-4.svg",
  author: "اتوماسیون AI",
  designation: "با هوش مصنوعی سریع‌تر تصمیم بگیرید",
};

const Feature322 = ({
  className,
  features = DEFAULT_FEATURES,
  testimonial = DEFAULT_TESTIMONIAL,
}: Feature322Props) => {
  const ref = useRef<HTMLDivElement>(null);
  const { scrollYProgress } = useScroll({
    container: ref,
  });
  const [activeIndex, setActiveIndex] = useState(0);

  useEffect(() => {
    const unsubscribe = scrollYProgress.on("change", (latest) => {
      let minDistance = Infinity;
      let temp = 0;
      features.forEach((_, index) => {
        const range = getAnimationRange(index, features.length);
        const position = range[1];
        const distance = Math.abs(latest - position);
        if (distance < minDistance) {
          minDistance = distance;
          temp = index;
        }
      });
      setActiveIndex(temp);
    });

    return () => unsubscribe();
  }, [features, scrollYProgress]);

  return (
    <section
      ref={ref}
      dir="rtl"
      lang="fa"
      className={cn("h-screen overflow-y-auto", className)}
    >
      <div className="container">
        <div className="sticky top-0 hidden h-screen w-full flex-col items-center justify-center gap-10 lg:flex">
          <div className="relative h-full w-full lg:h-1/2">
            <AnimatePresence mode="popLayout">
              <FeatureCard
                key={features[activeIndex]?.id ?? `feature-${activeIndex}`}
                index={activeIndex}
                feature={features[activeIndex]}
                testimonial={testimonial}
                totalFeatures={features.length}
                scrollYProgress={scrollYProgress}
              />
            </AnimatePresence>
          </div>
        </div>
        <div className="flex w-full flex-col items-center justify-center gap-10 overflow-y-auto py-32 lg:hidden">
          <div className="relative h-full w-full lg:h-1/2">
            {features.map((feature, index) => {
              return (
                <FeatureCard
                  key={feature.id}
                  index={index}
                  feature={feature}
                  testimonial={testimonial}
                  totalFeatures={features.length}
                  scrollYProgress={scrollYProgress}
                />
              );
            })}
          </div>
        </div>

        <div
          style={{
            height: `${features.length * 75}vh`,
          }}
          className="hidden lg:block"
        />
      </div>
    </section>
  );
};

export { Feature322 };