'use client'

import { useState, useEffect, useCallback } from 'react'
import Image from 'next/image'
import Link from 'next/link'
import pulseIcon from '@/public/pulse_icon_no_margins.png'
import { AnimatePresence, motion } from 'framer-motion'
import { PulseMockup } from '@/components/marketing/mockups/pulse-mockup'
import { PagesCard, ReferrersCard, LocationsCard, TechnologyCard, PeakHoursCard } from '@/components/marketing/mockups/pulse-features-carousel'

interface Slide {
  headline: string
  mockup: React.ReactNode
}

function FeatureCard({ children }: { children: React.ReactNode }) {
  return (
    <div className="rounded-xl border border-white/[0.08] bg-neutral-900/80 px-6 py-5 shadow-2xl">
      {children}
    </div>
  )
}

const slides: Slide[] = [
  { headline: 'Your traffic, at a glance.', mockup: <PulseMockup /> },
  { headline: 'See which pages perform best.', mockup: <FeatureCard><PagesCard /></FeatureCard> },
  { headline: 'Know where your visitors come from.', mockup: <FeatureCard><ReferrersCard /></FeatureCard> },
  { headline: 'Visitors from around the world.', mockup: <FeatureCard><LocationsCard /></FeatureCard> },
  { headline: 'Understand your audience\u2019s tech stack.', mockup: <FeatureCard><TechnologyCard /></FeatureCard> },
  { headline: 'Find your peak traffic hours.', mockup: <FeatureCard><PeakHoursCard /></FeatureCard> },
]

export default function FeatureSlideshow() {
  const [activeIndex, setActiveIndex] = useState(0)

  const advance = useCallback(() => {
    setActiveIndex((prev) => (prev + 1) % slides.length)
  }, [])

  useEffect(() => {
    let timer: ReturnType<typeof setInterval> | null = null

    const start = () => { timer = setInterval(advance, 8000) }
    const stop = () => { if (timer) { clearInterval(timer); timer = null } }

    const onVisibility = () => {
      if (document.hidden) stop()
      else start()
    }

    start()
    document.addEventListener('visibilitychange', onVisibility)
    return () => {
      stop()
      document.removeEventListener('visibilitychange', onVisibility)
    }
  }, [advance])

  const slide = slides[activeIndex]

  return (
    <div className="relative h-full w-full">
      {/* Background image */}
      <Image
        src="/pulse-showcase-bg.png"
        alt=""
        fill
        unoptimized
        className="object-cover"
        priority
      />

      {/* Dark overlay */}
      <div className="absolute inset-0 bg-black/40" />

      {/* Logo */}
      <div className="absolute top-0 left-0 z-20 px-6 py-5">
        <Link href="/pricing" className="flex items-center gap-2 w-fit hover:opacity-80 transition-opacity">
          <Image
            src={pulseIcon}
            alt="Pulse"
            width={36}
            height={36}
            unoptimized
            className="object-contain w-8 h-8"
          />
          <span className="text-xl font-bold text-white tracking-tight">Pulse</span>
        </Link>
      </div>

      {/* Content */}
      <div className="relative z-10 flex h-full flex-col items-center justify-center px-10 xl:px-14 py-12 overflow-hidden">
        <AnimatePresence mode="wait">
          <motion.div
            key={activeIndex}
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
            transition={{ duration: 0.45 }}
            className="flex flex-col items-center gap-6 w-full max-w-lg"
          >
            {/* Headline — centered */}
            <h2 className="text-3xl xl:text-4xl font-bold text-white leading-tight text-center">
              {slide.headline}
            </h2>

            {/* Mockup — constrained */}
            <div className="relative w-full">
              {/* Orange glow */}
              <div className="absolute -inset-8 rounded-3xl bg-brand-orange/8 blur-3xl pointer-events-none" />

              <div className="relative rounded-2xl overflow-hidden" style={{ maxHeight: '55vh' }}>
                {slide.mockup}
              </div>
            </div>
          </motion.div>
        </AnimatePresence>
      </div>
    </div>
  )
}