'use client';

import { useEffect, useState } from 'react';
import { motion } from 'framer-motion';
import Link from 'next/link';
import { RippleButton, SealButton } from '@/components/ui/ripple-button';
import { MagneticButton, BlurReveal, CounterWithEffect } from '@/lib/animations';
import { COMPANY_INFO, STATS } from '@/lib/constants';
import { ArrowRight, Shield, Zap, Award } from 'lucide-react';

interface HeroContentProps {
  isVisible: boolean;
}

const features = [
  { icon: Shield, text: '安全可靠' },
  { icon: Zap, text: '高效便捷' },
  { icon: Award, text: '专业服务' },
];

function scrollTo(id: string) {
  const element = document.getElementById(id);
  if (element) {
    element.scrollIntoView({ behavior: 'smooth' });
  }
}

function handleKeyDown(event: React.KeyboardEvent<HTMLButtonElement>, id: string) {
  if (event.key === 'Enter' || event.key === ' ') {
    event.preventDefault();
    scrollTo(id);
  }
}

export function HeroContent({ isVisible }: HeroContentProps) {
  return (
    <motion.div
      initial={{ opacity: 0, y: 20, scale: 0.95 }}
      animate={isVisible ? { opacity: 1, y: 0, scale: 1 } : {}}
      transition={{ duration: 0.6, ease: [0.16, 1, 0.3, 1] }}
      className="mb-8"
    >
      <span className="inline-flex items-center gap-2 px-5 py-2.5 rounded-full border border-[#1C1C1C]/20 bg-[#F5F5F5] text-[#1C1C1C] text-sm font-medium">
        智连未来，成长伙伴
      </span>
    </motion.div>
  );
}

export function HeroTitle({ isVisible }: HeroContentProps) {
  return (
    <motion.h1
      id="hero-heading"
      initial={{ opacity: 0, y: 20 }}
      animate={isVisible ? { opacity: 1, y: 0 } : {}}
      transition={{ duration: 0.6, delay: 0.1 }}
      className="text-5xl sm:text-6xl lg:text-7xl tracking-tight mb-6 font-calligraphy"
      style={{ 
        fontWeight: 'normal',
        WebkitFontSmoothing: 'antialiased',
        MozOsxFontSmoothing: 'grayscale',
        textRendering: 'optimizeLegibility'
      }}
    >
      {COMPANY_INFO.shortName}
    </motion.h1>
  );
}

export function HeroDescription(_props: HeroContentProps) {
  return (
    <div className="mb-10">
      <BlurReveal delay={0.3}>
        <p className="text-xl sm:text-2xl text-[#4A5568] mb-4">
          <span className="font-semibold bg-gradient-to-r from-[#C41E3A] via-[#E04A68] to-[#C41E3A] bg-clip-text text-transparent">
            企业数字化转型服务商
          </span>
        </p>
      </BlurReveal>
      <BlurReveal delay={0.4}>
        <p className="text-lg text-[#718096] max-w-2xl mx-auto leading-relaxed">
          以智慧连接数字趋势，以伙伴身份陪您成长——您的数字化转型同行者
        </p>
      </BlurReveal>
    </div>
  );
}

export function HeroButtons({ isVisible }: HeroContentProps) {
  return (
    <motion.div
      initial={{ opacity: 0, y: 20 }}
      animate={isVisible ? { opacity: 1, y: 0 } : {}}
      transition={{ duration: 0.6, delay: 0.3 }}
      className="flex flex-col sm:flex-row items-center justify-center gap-4 mb-8"
    >
      <MagneticButton strength={0.4}>
        <Link href="/contact">
          <SealButton size="lg" className="min-w-45">
            立即咨询
            <ArrowRight className="w-4 h-4 ml-2" />
          </SealButton>
        </Link>
      </MagneticButton>
      <MagneticButton strength={0.4}>
        <RippleButton 
          size="lg"
          variant="outline"
          onClick={() => scrollTo('about')}
          onKeyDown={(e) => handleKeyDown(e, 'about')}
          className="min-w-45"
        >
          了解更多
        </RippleButton>
      </MagneticButton>
    </motion.div>
  );
}

export function HeroFeatures({ isVisible }: HeroContentProps) {
  return (
    <motion.div
      initial={{ opacity: 0, y: 20 }}
      animate={isVisible ? { opacity: 1, y: 0 } : {}}
      transition={{ duration: 0.6, delay: 0.35 }}
      className="flex flex-wrap gap-4 justify-center mb-16"
    >
      {features.map((feature, index) => (
        <motion.div 
          key={index}
          initial={{ opacity: 0, scale: 0.9 }}
          animate={isVisible ? { opacity: 1, scale: 1 } : {}}
          transition={{ duration: 0.4, delay: 0.4 + index * 0.1 }}
          whileHover={{ scale: 1.05, y: -2 }}
          className="flex items-center gap-2 px-4 py-2 rounded-full bg-[#FAFAFA] border border-[#E5E5E5] transition-all duration-300 hover:border-[#1C1C1C] hover:shadow-md cursor-default"
        >
          <feature.icon className="w-4 h-4 text-[#C41E3A]" />
          <span className="text-sm text-[#3D3D3D]">{feature.text}</span>
        </motion.div>
      ))}
    </motion.div>
  );
}

export function HeroStats() {
  const [statsVisible, setStatsVisible] = useState(false);

  useEffect(() => {
    const statsEl = document.getElementById('stats-section');
    if (!statsEl) return;
    
    const observer = new IntersectionObserver(
      ([entry]) => {
        if (entry?.isIntersecting) {
          setStatsVisible(true);
        }
      },
      { threshold: 0.5 }
    );

    observer.observe(statsEl);
    return () => observer.disconnect();
  }, []);

  return (
    <motion.div
      id="stats-section"
      initial={{ opacity: 0, y: 20 }}
      animate={statsVisible ? { opacity: 1, y: 0 } : {}}
      transition={{ duration: 0.6, delay: 0.4 }}
      className="pt-16 border-t border-[#E2E8F0]"
    >
      <div className="grid grid-cols-2 md:grid-cols-4 gap-8 md:gap-12">
        {STATS.map((stat, index) => (
          <HeroStatItem 
            key={stat.label} 
            stat={stat} 
            index={index}
            shouldAnimate={statsVisible}
          />
        ))}
      </div>
    </motion.div>
  );
}

function HeroStatItem({ stat, index, shouldAnimate }: { 
  stat: { value: string; label: string }; 
  index: number;
  shouldAnimate: boolean;
}) {
  const numericValue = parseInt(stat.value.replace(/\D/g, ''));
  const suffix = stat.value.replace(/[\d]/g, '');

  return (
    <motion.div 
      className="group cursor-default text-center"
      initial={{ opacity: 0, y: 20, scale: 0.9 }}
      animate={shouldAnimate ? { opacity: 1, y: 0, scale: 1 } : {}}
      transition={{ duration: 0.5, delay: index * 0.1, type: 'spring', stiffness: 100 }}
      whileHover={{ scale: 1.05, y: -5 }}
    >
      <div className="text-4xl sm:text-5xl font-bold text-[#C41E3A] mb-3">
        {shouldAnimate ? (
          <CounterWithEffect 
            end={numericValue} 
            suffix={suffix} 
            effect="bounce"
            duration={2000}
          />
        ) : (
          <span className="text-[#CBD5E0]">0{suffix}</span>
        )}
      </div>
      <div className="text-sm text-[#718096] group-hover:text-[#4A5568] transition-colors">
        {stat.label}
      </div>
    </motion.div>
  );
}