'use client';

import { useEffect, useRef, useState } from 'react';
import { StaticLink } from '@/components/ui/static-link';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { BackButton } from '@/components/ui/back-button';
import {
  Target,
  Quote,
  Clock,
  MessageCircle,
  Award,
  TrendingUp,
} from 'lucide-react';

interface CaseKeyMoment {
  title: string;
  description: string;
}

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

interface CaseTestimonial {
  quote: string;
  author: string;
  role: string;
}

interface CaseItem {
  id: string;
  title: string;
  excerpt: string;
  content: string;
  category: string;
  slug: string;
  date: string;
  image?: string;
  /** 客户面临的挑战 */
  challenge: string;
  /** 我们的解决方案 */
  solution: string;
  /** 关键时刻 */
  keyMoments: CaseKeyMoment[];
  /** 成果数据 */
  results: CaseResult[];
  /** 客户证言 */
  testimonial?: CaseTestimonial;
  /** 合作时长 */
  duration: string;
}

interface CaseDetailClientProps {
  caseItem: CaseItem;
}

export function CaseDetailClient({ caseItem }: CaseDetailClientProps) {
  const [isVisible, setIsVisible] = useState(false);
  const contentRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const observer = new IntersectionObserver(
      ([entry]) => {
        if (entry?.isIntersecting) {
          setIsVisible(true);
        }
      },
      { threshold: 0.1 }
    );

    if (contentRef.current) {
      observer.observe(contentRef.current);
    }

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

  return (
    <div className="min-h-screen bg-white">
      <div className="relative overflow-hidden bg-gradient-to-b from-[#FAFAFA] to-white">
        <div className="container-wide relative z-10 pt-32 pb-20">
          <BackButton />
          <div className="max-w-4xl mt-8">
            <Badge className="mb-4 bg-[#C41E3A]/10 text-[#C41E3A] hover:bg-[#C41E3A]/20">
              {caseItem.category}
            </Badge>
            <h1 className="text-3xl sm:text-4xl lg:text-5xl font-semibold text-[#1C1C1C] mb-2">
              {caseItem.title}
            </h1>
            <p className="text-lg text-[#5C5C5C]">{caseItem.excerpt}</p>
          </div>
        </div>
      </div>

      <div ref={contentRef} className="container-wide py-12 md:py-16">
        <div
          className={`
            grid lg:grid-cols-3 gap-8 lg:gap-12
            opacity-0 translate-y-4
            ${isVisible ? 'animate-fade-in-up' : ''}
          `}
        >
          <div className="lg:col-span-2 space-y-12">
            {/* 客户遇到的成长瓶颈 */}
            <section className="bg-gradient-to-br from-[#FFFBF5] to-white rounded-2xl p-8 border border-[#C41E3A]/20">
              <div className="flex items-center gap-3 mb-6">
                <div className="w-12 h-12 bg-[#C41E3A] rounded-xl flex items-center justify-center">
                  <MessageCircle className="w-6 h-6 text-white" />
                </div>
                <h2 className="text-2xl font-semibold text-[#1C1C1C]">
                  客户遇到的成长瓶颈
                </h2>
              </div>
              <p className="text-[#5C5C5C] leading-relaxed text-lg">
                {caseItem.challenge}
              </p>
            </section>

            {/* 我们如何智连未来 */}
            <section className="bg-gradient-to-br from-[#FFFBF5] to-white rounded-2xl p-8 border border-[#C41E3A]/20">
              <div className="flex items-center gap-3 mb-6">
                <div className="w-12 h-12 bg-[#C41E3A] rounded-xl flex items-center justify-center">
                  <Target className="w-6 h-6 text-white" />
                </div>
                <h2 className="text-2xl font-semibold text-[#1C1C1C]">
                  我们如何智连未来
                </h2>
              </div>
              <div className="prose prose-base max-w-none [&_h3]:text-xl [&_h3]:font-semibold [&_h3]:text-[#1C1C1C] [&_h3]:mt-8 [&_h3]:mb-4 [&_p]:text-[#5C5C5C] [&_p]:leading-[1.8] [&_p]:mb-4 [&_p]:text-base">
                <p className="text-[#5C5C5C] leading-relaxed text-lg">
                  {caseItem.solution}
                </p>
              </div>
            </section>

            {/* 共同成长的故事 */}
            {caseItem.keyMoments && caseItem.keyMoments.length > 0 && (
              <section className="bg-gradient-to-br from-[#FFFBF5] to-white rounded-2xl p-8 border border-[#C41E3A]/20">
                <div className="flex items-center gap-3 mb-6">
                  <div className="w-12 h-12 bg-[#C41E3A] rounded-xl flex items-center justify-center">
                    <Clock className="w-6 h-6 text-white" />
                  </div>
                  <h2 className="text-2xl font-semibold text-[#1C1C1C]">
                    共同成长的故事
                  </h2>
                </div>
                <div className="space-y-4">
                  {caseItem.keyMoments.map((moment, index) => (
                    <div
                      key={index}
                      className="p-4 bg-white rounded-lg border border-[#E5E5E5]"
                    >
                      <div className="flex items-start gap-3">
                        <Quote className="w-5 h-5 text-[#C41E3A] flex-shrink-0 mt-0.5" />
                        <div>
                          <h4 className="font-semibold text-[#1C1C1C] mb-2">
                            {moment.title}
                          </h4>
                          <p className="text-sm text-[#737373]">
                            {moment.description}
                          </p>
                        </div>
                      </div>
                    </div>
                  ))}
                </div>
              </section>
            )}

            {/* 今天，他们走到了哪里 */}
            {caseItem.results && caseItem.results.length > 0 && (
              <section className="bg-gradient-to-br from-[#FFFBF5] to-white rounded-2xl p-8 border border-[#C41E3A]/20">
                <div className="flex items-center gap-3 mb-6">
                  <div className="w-12 h-12 bg-[#C41E3A] rounded-xl flex items-center justify-center">
                    <Award className="w-6 h-6 text-white" />
                  </div>
                  <h2 className="text-2xl font-semibold text-[#1C1C1C]">
                    今天，他们走到了哪里
                  </h2>
                </div>
                <div className="grid sm:grid-cols-3 gap-4">
                  {caseItem.results.map((result, index) => (
                    <div
                      key={index}
                      className="p-6 bg-white rounded-lg border border-[#E5E5E5] hover:border-[#C41E3A] transition-colors"
                    >
                      <TrendingUp className="w-8 h-8 text-[#C41E3A] mb-3" />
                      <div className="text-2xl font-semibold text-[#C41E3A] mb-1">
                        {result.value}
                      </div>
                      <div className="text-sm text-[#737373]">
                        {result.label}
                      </div>
                    </div>
                  ))}
                </div>
              </section>
            )}

            {/* 客户证言精选 */}
            {caseItem.testimonial && (
              <section className="bg-gradient-to-br from-[#FFFBF5] to-white rounded-2xl p-8 border border-[#C41E3A]/20">
                <div className="flex items-center gap-3 mb-6">
                  <div className="w-12 h-12 bg-[#C41E3A] rounded-xl flex items-center justify-center">
                    <Quote className="w-6 h-6 text-white" />
                  </div>
                  <h2 className="text-2xl font-semibold text-[#1C1C1C]">
                    客户证言精选
                  </h2>
                </div>
                <div className="p-6 bg-white rounded-lg border border-[#E5E5E5]">
                  <Quote className="w-8 h-8 text-[#C41E3A] mb-4" />
                  <p className="text-lg text-[#1C1C1C] leading-relaxed mb-4">
                    {caseItem.testimonial.quote}
                  </p>
                  <div className="flex items-center gap-3">
                    <div className="w-12 h-12 bg-[#C41E3A] rounded-full flex items-center justify-center">
                      <span className="text-white font-semibold">客</span>
                    </div>
                    <div>
                      <p className="font-semibold text-[#1C1C1C]">
                        {caseItem.testimonial.author}
                      </p>
                      <p className="text-sm text-[#737373]">
                        {caseItem.testimonial.role}
                      </p>
                    </div>
                  </div>
                </div>
              </section>
            )}
          </div>

          {/* 侧边栏 */}
          <div className="space-y-6">
            <div className="p-6 bg-[#FAFAFA] rounded-lg border border-[#E5E5E5]">
              <h3 className="text-lg font-semibold text-[#1C1C1C] mb-4">
                项目信息
              </h3>
              <dl className="space-y-3">
                <div>
                  <dt className="text-sm text-[#737373]">客户名称</dt>
                  <dd className="text-[#1C1C1C] font-medium">
                    {caseItem.testimonial?.author || '客户企业'}
                  </dd>
                </div>
                <div>
                  <dt className="text-sm text-[#737373]">行业领域</dt>
                  <dd className="text-[#1C1C1C] font-medium">
                    {caseItem.category}
                  </dd>
                </div>
                <div>
                  <dt className="text-sm text-[#737373]">合作时长</dt>
                  <dd className="text-[#1C1C1C] font-medium">
                    {caseItem.duration || '3年'}
                  </dd>
                </div>
                <div>
                  <dt className="text-sm text-[#737373]">发布时间</dt>
                  <dd className="text-[#1C1C1C] font-medium">{caseItem.date}</dd>
                </div>
              </dl>
            </div>

            <div className="p-6 bg-gradient-to-br from-[#C41E3A] to-[#8B1429] rounded-lg text-white">
              <h3 className="text-lg font-semibold mb-2">想要了解更多？</h3>
              <p className="text-sm text-white/80 mb-4">
                联系我们的专家团队，获取定制化解决方案
              </p>
              <Button
                className="w-full bg-white text-[#C41E3A] hover:bg-white/90"
                asChild
              >
                <StaticLink href="/contact">联系我们</StaticLink>
              </Button>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}