'use client';

import { useCallback, useRef, useState } from 'react';
import { motion } from 'framer-motion';
import { StaticLink } from '@/components/ui/static-link';
import { Button } from '@/components/ui/button';
import { HeroInkBackground } from '@/components/ui/hero-ink-background';
import { COMPANY_INFO } from '@/lib/constants';
import { ArrowRight, MessageSquare, Search, Rocket, Handshake } from 'lucide-react';
import { useReducedMotion } from '@/hooks/use-reduced-motion';

const EASE = [0.16, 1, 0.3, 1] as const;

const CAPABILITIES = [
  { icon: MessageSquare, label: '需求沟通' },
  { icon: Search, label: '方案诊断' },
  { icon: Rocket, label: '敏捷交付' },
  { icon: Handshake, label: '长期陪跑' },
];

const JOURNEY_STEPS = [
  { icon: MessageSquare, label: '需求沟通', desc: '深入理解您的业务痛点' },
  { icon: Search, label: '方案诊断', desc: '量身定制技术路径' },
  { icon: Rocket, label: '敏捷交付', desc: '快速迭代持续验证' },
  { icon: Handshake, label: '长期陪跑', desc: '持续优化保障落地' },
];

export function HeroSectionV2() {
  const [mousePos, setMousePos] = useState({ x: 0, y: 0 });
  const [isCardHovered, setIsCardHovered] = useState(false);
  const cardRef = useRef<HTMLDivElement>(null);
  const shouldReduceMotion = useReducedMotion();

  const handleCardMouseMove = useCallback((e: React.MouseEvent) => {
    if (!cardRef.current) { return; }
    const rect = cardRef.current.getBoundingClientRect();
    setMousePos({
      x: e.clientX - rect.left,
      y: e.clientY - rect.top,
    });
  }, []);

  const fadeUp = (delay: number) => ({
    initial: shouldReduceMotion ? {} : { opacity: 0, y: 24 },
    animate: { opacity: 1, y: 0 },
    transition: { duration: 0.5, delay, ease: EASE },
  });

  return (
    <section
      id="home"
      aria-labelledby="hero-heading"
      className="relative min-h-screen flex flex-col justify-center overflow-hidden bg-[var(--color-bg-primary)]"
    >
      <HeroInkBackground />

      <div className="container-wide py-16 md:py-24 lg:py-32 relative z-10 flex-1 flex items-center">
        <div className="grid grid-cols-1 lg:grid-cols-2 gap-10 lg:gap-16 items-center w-full">
          <div>
            <motion.div
              {...fadeUp(0)}
              className="mb-6"
            >
              <span className="inline-flex items-center gap-2 px-3 py-1.5 sm:px-4 sm:py-2 rounded-full bg-[var(--color-brand-primary-bg)] text-[var(--color-brand-primary)] text-xs sm:text-sm font-medium border border-[var(--color-brand-primary)]/10">
                {COMPANY_INFO.slogan}
              </span>
            </motion.div>

            <motion.p
              {...fadeUp(0.1)}
              className="text-lg sm:text-xl lg:text-2xl text-[var(--color-text-primary)] mb-3"
            >
              <span className="font-semibold text-[var(--color-brand-primary)] font-calligraphy">
                企业数字化转型服务商
              </span>
            </motion.p>

            <motion.h1
              id="hero-heading"
              {...fadeUp(0.15)}
              className="text-5xl sm:text-6xl lg:text-7xl tracking-tight mb-5 font-brand leading-[1.1]"
              style={{ fontWeight: 'normal' }}
            >
              {COMPANY_INFO.shortName}
            </motion.h1>

            <motion.p
              {...fadeUp(0.25)}
              className="text-base sm:text-lg text-[var(--color-text-muted)] max-w-lg leading-relaxed mb-8"
            >
              {COMPANY_INFO.description}
            </motion.p>

            <motion.div
              {...fadeUp(0.35)}
              className="flex flex-col sm:flex-row items-start gap-4 mb-10"
            >
              <Button size="lg" asChild className="min-h-[52px] px-8 text-base font-semibold shadow-lg shadow-[var(--color-brand-primary)]/20">
                <StaticLink href="/contact">
                  免费获取定制方案
                  <ArrowRight className="w-4 h-4 ml-2" />
                </StaticLink>
              </Button>
              <Button size="lg" variant="ghost" asChild className="text-[var(--color-text-muted)]">
                <StaticLink href="/products">探索产品</StaticLink>
              </Button>
            </motion.div>
          </div>

          <motion.div
            initial={shouldReduceMotion ? {} : { opacity: 0, y: 32 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.6, delay: 0.5, ease: EASE }}
          >
            <div
              ref={cardRef}
              className="relative ink-glow-border rounded-2xl lg:opacity-95"
              style={
                {
                  '--glow-start': 'var(--color-brand-primary)',
                  '--glow-end': 'var(--color-warning)',
                } as React.CSSProperties
              }
              onMouseMove={handleCardMouseMove}
              onMouseEnter={() => setIsCardHovered(true)}
              onMouseLeave={() => setIsCardHovered(false)}
            >
              <div
                className="absolute inset-0 rounded-2xl pointer-events-none transition-opacity duration-500"
                style={{
                  opacity: isCardHovered ? 1 : 0,
                  background: `radial-gradient(400px circle at ${mousePos.x}px ${mousePos.y}px, rgba(var(--color-brand-primary-rgb), 0.06), transparent 40%)`,
                }}
              />

              <div className="relative rounded-2xl bg-[var(--color-bg-primary)]/80 backdrop-blur-sm p-6 sm:p-8 lg:p-10">
                <div className="w-12 h-12 lg:w-14 lg:h-14 rounded-xl bg-[var(--color-brand-primary-bg)] flex items-center justify-center mb-5 lg:mb-6">
                  <Handshake className="w-5 h-5 lg:w-6 lg:h-6 text-[var(--color-brand-primary)]" strokeWidth={1.8} />
                </div>

                <h3 className="text-lg lg:text-xl font-semibold text-[var(--color-text-primary)] mb-2">
                  从沟通到落地，全程陪伴
                </h3>
                <p className="text-sm text-[var(--color-text-muted)] leading-relaxed mb-6 lg:mb-8">
                  四步合作流程，确保每个项目科学推进、高效交付
                </p>

                <div className="grid grid-cols-2 gap-3 lg:gap-4 lg:block lg:space-y-4">
                  {JOURNEY_STEPS.map((step, idx) => {
                    const Icon = step.icon;
                    return (
                      <div
                        key={step.label}
                        className="flex items-center gap-3 lg:gap-4 p-2.5 lg:p-3 rounded-lg bg-[var(--color-bg-section)]/60"
                      >
                        <div className="w-8 h-8 lg:w-9 lg:h-9 rounded-lg bg-[var(--color-brand-primary-bg)] flex items-center justify-center shrink-0">
                          <Icon className="w-3.5 h-3.5 lg:w-4 lg:h-4 text-[var(--color-brand-primary)]" strokeWidth={2.2} />
                        </div>
                        <div className="flex-1 min-w-0">
                          <div className="flex items-center gap-1.5 lg:gap-2">
                            <span className="text-[10px] lg:text-xs font-bold text-[var(--color-brand-primary)]">0{idx + 1}</span>
                            <span className="text-xs lg:text-sm font-medium text-[var(--color-text-primary)]">{step.label}</span>
                          </div>
                          <p className="text-[10px] lg:text-xs text-[var(--color-text-muted)] mt-0.5 hidden sm:block">{step.desc}</p>
                        </div>
                      </div>
                    );
                  })}
                </div>

                {/* Integrated capabilities */}
                <div className="mt-4 pt-4 border-t border-[var(--color-border-primary)]/50">
                  <div className="flex flex-wrap gap-1.5">
                    {CAPABILITIES.map((cap, idx) => {
                      const Icon = cap.icon;
                      return (
                        <div
                          key={cap.label}
                          className="flex items-center gap-2 px-3 py-2 rounded-lg border transition-colors duration-200"
                          style={{
                            backgroundColor: idx === 0 ? 'var(--color-brand-primary-bg)' : idx === 1 ? 'rgba(var(--color-accent-blue-rgb), 0.06)' : idx === 2 ? 'rgba(var(--color-accent-purple-rgb), 0.06)' : 'rgba(var(--color-accent-cyan-rgb), 0.06)',
                            borderColor: idx === 0 ? 'rgba(var(--color-brand-primary-rgb), 0.15)' : 'var(--color-border-primary)',
                          }}
                        >
                          <Icon
                            className="w-4 h-4"
                            style={{ color: idx === 0 ? 'var(--color-brand-primary)' : idx === 1 ? 'var(--color-accent-blue)' : idx === 2 ? 'var(--color-accent-purple)' : 'var(--color-accent-cyan)' }}
                            strokeWidth={2.2}
                          />
                          <span className="text-xs font-medium text-[var(--color-text-primary)]">{cap.label}</span>
                        </div>
                      );
                    })}
                  </div>
                </div>
              </div>
            </div>
          </motion.div>
        </div>
      </div>
    </section>
  );
}