"use client";

import { useMemo, useRef } from "react";
import AutoScroll from "embla-carousel-auto-scroll";
import { Icon } from "@iconify/react";

import {
  Carousel,
  CarouselContent,
  CarouselItem,
} from "@/components/ui/carousel";
import { Container } from "@/components/container";
import { MotionReveal } from "@/components/motion-reveal";
import { layout } from "@/lib/layout";
import { type } from "@/lib/typography";
import { cn } from "@/lib/utils";

const NORMAL_SPEED = 1;
const HOVER_SPEED = 0.35;

interface Logo {
  id: string;
  description: string;
  icon: string;
  className?: string;
}

interface Logos3Props {
  heading?: string;
  logos?: Logo[];
  className?: string;
}

const defaultLogos: Logo[] = [
  {
    id: "logo-1",
    description: "Next.js",
    icon: "logos:nextjs-icon",
    className: "size-8",
  },
  {
    id: "logo-2",
    description: "React",
    icon: "logos:react",
    className: "size-8",
  },
  {
    id: "logo-3",
    description: "TypeScript",
    icon: "logos:typescript-icon",
    className: "size-8",
  },
  {
    id: "logo-4",
    description: "Tailwind CSS",
    icon: "logos:tailwindcss-icon",
    className: "size-8",
  },
  {
    id: "logo-5",
    description: "WordPress",
    icon: "skill-icons:wordpress",
    className: "size-8",
  },
  {
    id: "logo-6",
    description: "Google",
    icon: "logos:google-icon",
    className: "size-8",
  },
  {
    id: "logo-7",
    description: "Figma",
    icon: "logos:figma",
    className: "size-8",
  },
  {
    id: "logo-8",
    description: "Vercel",
    icon: "logos:vercel-icon",
    className: "size-8",
  },
];

export function Logos3({
  heading = "همکاری اخیر ما با برندهای معتبر",
  logos = defaultLogos,
  className,
}: Logos3Props) {
  const speedRef = useRef(NORMAL_SPEED);

  // Embla reads `speed` each animation frame via numeric coercion (`valueOf`),
  // so hover can slow the scroll without stopping or re-initializing the plugin.
  const autoScrollPlugin = useMemo(
    () =>
      AutoScroll({
        playOnInit: true,
        speed: {
          valueOf: () => speedRef.current,
        } as unknown as number,
        stopOnInteraction: false,
        stopOnMouseEnter: false,
        startDelay: 0,
      }),
    []
  );

  return (
    <section
      className={cn(
        "section-shell bg-section-muted",
        layout.scrollMargin,
        layout.sectionY,
        className
      )}
    >
      <Container className="section-content flex flex-col items-center text-center">
        <MotionReveal>
          <h2 className={cn(type.h2, "text-balance")}>{heading}</h2>
        </MotionReveal>
      </Container>
      <Container className="section-content pt-4 md:pt-14 lg:pt-16">
        <MotionReveal>
          <div
            className={cn(
              "relative flex items-center justify-center overflow-x-clip",
              // Fade logos via mask (no painted overlay) so edges match translucent section surfaces
              "[mask-image:linear-gradient(to_right,transparent,black_12%,black_88%,transparent)]",
              "[-webkit-mask-image:linear-gradient(to_right,transparent,black_12%,black_88%,transparent)]"
            )}
            onMouseEnter={() => {
              speedRef.current = HOVER_SPEED;
            }}
            onMouseLeave={() => {
              speedRef.current = NORMAL_SPEED;
            }}
          >
            <Carousel
              opts={{ loop: true, direction: "rtl" }}
              plugins={[autoScrollPlugin]}
            >
              <CarouselContent className="ml-0">
                {logos.map((logo) => (
                  <CarouselItem
                    key={logo.id}
                    className="flex basis-1/3 justify-center pl-0 md:basis-1/5 lg:basis-1/6"
                  >
                    <div className="mx-2 flex shrink-0 items-center justify-center sm:mx-8 md:mx-10">
                      <Icon
                        icon={logo.icon}
                        className={cn(
                          "shrink-0 opacity-70 transition-opacity duration-200 hover:opacity-100",
                          "dark:opacity-80 dark:hover:opacity-100",
                          logo.className
                        )}
                        aria-label={logo.description}
                      />
                    </div>
                  </CarouselItem>
                ))}
              </CarouselContent>
            </Carousel>
          </div>
        </MotionReveal>
      </Container>
    </section>
  );
}