'use client';

import { motion } from 'framer-motion';
import { CTAButton } from '@/components/ui/cta-button';
import {
  Trophy,
  Shield, Award, Zap,
  type LucideIcon,
} from 'lucide-react';

const EASE_OUT = [0.22, 1, 0.36, 1] as const;

/** Icon name-to-component mapping for CMS string-based icons */
const ICON_MAP: Record<string, LucideIcon> = {
  Shield,
  Award,
  Zap,
  Trophy,
};

const DEFAULT_CERT_ICON_NAMES = ['Shield', 'Award', 'Zap', 'Trophy'] as const;

interface AboutData {
  heroSubtitle?: string;
  heroTitle?: string;
  heroDescription?: string;
  heroPrimaryCtaLabel?: string;
  heroPrimaryCtaHref?: string;
  heroSecondaryCtaLabel?: string;
  heroSecondaryCtaHref?: string;
  whoWeAreTitle?: string;
  whoWeAreDescription?: string;
  promiseText?: string;
  coreValues?: { number: string; title: string; description: string }[];
  milestones?: { year: string; title: string; description: string; highlight: string }[];
  keyMetrics?: { value: string; label: string; sub: string }[];
  certifications?: { name: string; description: string }[];
  partners?: string[];
  ctaTitle?: string;
  ctaDescription?: string;
  ctaPrimaryLabel?: string;
  ctaPrimaryHref?: string;
  ctaSecondaryLabel?: string;
  ctaSecondaryHref?: string;
}

function HeroSection({ data }: { data: AboutData }) {
  const titleLines = (data.heroTitle || '').split('\n');

  return (
    <section className="relative min-h-[85vh] flex items-center overflow-hidden bg-bg-primary">
      <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10 w-full py-28 sm:py-36 md:py-44 lg:py-56">
        <div className="max-w-4xl">
          <motion.div
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.3, delay: 0.1, ease: EASE_OUT }}
            className="text-sm font-mono tracking-[0.15em] text-text-muted mb-8"
          >
            {data.heroSubtitle || ''}
          </motion.div>

          <motion.h1
            initial={{ opacity: 0, y: 40 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.3, delay: 0.2, ease: EASE_OUT }}
            className="text-4xl sm:text-5xl md:text-6xl lg:text-7xl xl:text-8xl font-black text-ink leading-[0.88] tracking-tightest mb-10 sm:mb-12 md:mb-16"
          >
            {titleLines.map((line, i) => (
              <div key={i} className={`block ${i > 0 ? 'mt-4 sm:mt-6' : ''}`}>
                {i === 1 ? (
                  <span className="relative inline-block">
                    <span className="relative text-brand font-black">
                      {line}
                      <motion.span
                        className="absolute bottom-0 left-0 w-full h-[3px] bg-brand"
                        style={{ transformOrigin: 'left' }}
                        initial={{ scaleX: 0 }}
                        animate={{ scaleX: 1 }}
                        transition={{ duration: 0.3, delay: 1.2, ease: EASE_OUT }}
                      />
                    </span>
                  </span>
                ) : (
                  line
                )}
              </div>
            ))}
          </motion.h1>

          <motion.p
            initial={{ opacity: 0, y: 30 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.3, delay: 0.5, ease: EASE_OUT }}
            className="text-lg md:text-xl text-text-secondary max-w-2xl leading-relaxed mb-12 sm:mb-16"
          >
            {data.heroDescription || ''}
          </motion.p>

          <motion.div
            initial={{ opacity: 0, y: 30 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.3, delay: 0.7, ease: EASE_OUT }}
            className="flex flex-col sm:flex-row gap-4 sm:gap-6"
          >
            <CTAButton href={data.heroPrimaryCtaHref || '#'} className="min-h-[52px] touch-manipulation">
              {data.heroPrimaryCtaLabel || '预约咨询'}
            </CTAButton>
            <CTAButton href={data.heroSecondaryCtaHref || '#'} variant="secondary" className="min-h-[52px] touch-manipulation">
              {data.heroSecondaryCtaLabel || '了解更多'}
            </CTAButton>
          </motion.div>
        </div>
      </div>
    </section>
  );
}

function MetricsStrip({ data }: { data: AboutData }) {
  const metrics = data.keyMetrics ?? [];

  if (metrics.length === 0) return null;

  return (
    <section className="relative py-16 sm:py-20 md:py-24 overflow-hidden bg-bg-secondary">
      <div className="absolute top-0 left-0 right-0 h-px bg-border-primary" />
      <div className="absolute bottom-0 left-0 right-0 h-px bg-border-primary" />

      <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10">
        <div className="grid grid-cols-2 lg:grid-cols-4 gap-8 md:gap-12">
          {metrics.map((metric, i) => (
            <motion.div
              key={metric.label}
              initial={{ opacity: 0, y: 20 }}
              whileInView={{ opacity: 1, y: 0 }}
              viewport={{ once: true, margin: '-80px' }}
              transition={{ duration: 0.3, delay: i * 0.08, ease: EASE_OUT }}
              className="text-center lg:text-left"
            >
              <div className={`text-3xl sm:text-4xl md:text-5xl font-black tracking-tight mb-2 ${i === 0 ? 'text-brand' : 'text-ink'}`}>
                {metric.value}
              </div>
              <div className="text-sm font-medium text-text-secondary mb-1">{metric.label}</div>
              <div className="text-xs text-text-muted">{metric.sub}</div>
            </motion.div>
          ))}
        </div>
      </div>
    </section>
  );
}

function WhoWeAreSection({ data }: { data: AboutData }) {
  const values = data.coreValues ?? [];

  return (
    <section className="relative py-20 sm:py-28 md:py-36 lg:py-44 overflow-hidden bg-bg-primary">
      <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10">
        <div className="grid lg:grid-cols-12 gap-12 sm:gap-16 md:gap-20 items-start">
          <motion.div
            initial={{ opacity: 0, y: 30 }}
            whileInView={{ opacity: 1, y: 0 }}
            viewport={{ once: true, margin: '-80px' }}
            transition={{ duration: 0.3, ease: EASE_OUT }}
            className="lg:col-span-5"
          >
            <div className="flex items-center gap-4 mb-6">
              <span className="text-4xl md:text-5xl font-black text-brand/80 font-mono leading-none tabular-nums">01</span>
              <div>
                <div className="text-sm font-mono tracking-[0.2em] text-text-muted uppercase">
                  Why We Started
                </div>
                <div className="text-xs text-text-muted mt-1">为什么成立</div>
              </div>
            </div>
            <h2 className="text-3xl sm:text-4xl md:text-5xl lg:text-6xl font-extrabold text-ink tracking-tight leading-[0.95] mb-8">
              {data.whoWeAreTitle || ''}
            </h2>
            <p className="text-text-secondary leading-relaxed text-lg mb-8">
              {data.whoWeAreDescription || ''}
            </p>
            <div className="bg-brand/[0.04] border-t-2 border-brand p-6">
              <p className="text-ink font-medium leading-relaxed">
                {data.promiseText || ''}
              </p>
            </div>
          </motion.div>

          <motion.div
            initial={{ opacity: 0, y: 30 }}
            whileInView={{ opacity: 1, y: 0 }}
            viewport={{ once: true, margin: '-80px' }}
            transition={{ duration: 0.3, delay: 0.15, ease: EASE_OUT }}
            className="lg:col-span-7"
          >
            <div className="flex items-center gap-4 mb-6">
              <span className="text-4xl md:text-5xl font-black text-brand/80 font-mono leading-none tabular-nums">02</span>
              <div>
                <div className="text-sm font-mono tracking-[0.2em] text-text-muted uppercase">
                  How We Work
                </div>
                <div className="text-xs text-text-muted mt-1">怎么做事</div>
              </div>
            </div>
            <div className="space-y-6 md:space-y-8">
              {values.map((value) => (
                <div
                  key={value.title}
                  className="group relative border-b border-border-primary pb-6 md:pb-8 last:border-0 last:pb-0"
                >
                  <div className="flex items-start gap-6 md:gap-8">
                    {/* 纯装饰序号：与右侧 value.title 并列，无独立语义，标记 aria-hidden 豁免对比度要求 */}
                    <div aria-hidden="true" className="text-4xl md:text-5xl font-black text-text-muted/30 font-mono shrink-0 leading-none pt-1">
                      {value.number}
                    </div>
                    <div className="flex-1">
                      <h3 className="text-xl md:text-2xl font-bold text-ink mb-3 group-hover:text-brand transition-colors duration-300">
                        {value.title}
                      </h3>
                      <p className="text-text-secondary leading-relaxed">{value.description}</p>
                    </div>
                  </div>
                </div>
              ))}
            </div>
          </motion.div>
        </div>
      </div>
    </section>
  );
}

function MilestonesSection({ data }: { data: AboutData }) {
  const milestones = data.milestones ?? [];

  return (
    <section className="relative py-20 sm:py-28 md:py-36 lg:py-44 overflow-hidden bg-bg-secondary">
      <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10">
        <motion.div
          initial={{ opacity: 0, y: 30 }}
          whileInView={{ opacity: 1, y: 0 }}
          viewport={{ once: true, margin: '-80px' }}
          transition={{ duration: 0.3, ease: EASE_OUT }}
          className="max-w-3xl mb-16 sm:mb-20 md:mb-24"
        >
          <div className="flex items-center gap-4 mb-6">
            <span className="text-4xl md:text-5xl font-black text-brand/80 font-mono leading-none tabular-nums">03</span>
            <div>
              <div className="text-sm font-mono tracking-[0.2em] text-text-muted uppercase">
                Where We Are Heading
              </div>
              <div className="text-xs text-text-muted mt-1">走到哪里</div>
            </div>
          </div>
          <h2 className="text-3xl sm:text-4xl md:text-5xl lg:text-6xl font-extrabold text-ink tracking-tight leading-[0.95]">
            一路走来，<br className="sm:hidden" />步步扎实
          </h2>
        </motion.div>

        <div className="max-w-4xl mx-auto space-y-0">
          {milestones.map((milestone, idx) => (
            <motion.div
              key={milestone.year}
              initial={{ opacity: 0, x: -20 }}
              whileInView={{ opacity: 1, x: 0 }}
              viewport={{ once: true, margin: '-60px' }}
              transition={{ duration: 0.3, delay: idx * 0.08, ease: EASE_OUT }}
              className="relative pl-8 sm:pl-12 md:pl-16 pb-10 sm:pb-12 md:pb-14 last:pb-0"
            >
              <div className="absolute left-0 top-2 bottom-0 w-px bg-border-primary last:hidden" />
              <div className={`absolute left-0 top-2 w-3 h-3 rounded-full -translate-x-1/2 ${idx === 0 ? 'bg-brand' : 'bg-border-primary'}`} />

              <div className="grid sm:grid-cols-12 gap-4 sm:gap-8">
                <div className="sm:col-span-3">
                  <div className={`text-2xl sm:text-3xl md:text-4xl font-black tracking-tight ${idx === 0 ? 'text-brand' : 'text-ink'}`}>
                    {milestone.year}
                  </div>
                </div>
                <div className="sm:col-span-9">
                  <h3 className="text-xl md:text-2xl font-bold text-ink mb-2">{milestone.title}</h3>
                  <p className="text-text-secondary leading-relaxed mb-3">{milestone.description}</p>
                  <div className="text-sm font-medium text-ink">{milestone.highlight}</div>
                </div>
              </div>
            </motion.div>
          ))}
        </div>
      </div>
    </section>
  );
}

function CertificationsSection({ data }: { data: AboutData }) {
  const certifications = data.certifications ?? [];
  const partners = data.partners ?? [];

  // 初创阶段无资质/伙伴数据时，如实呈现「建设中」状态而非隐藏整块（零编造）
  if (certifications.length === 0 && partners.length === 0) {
    return (
      <section className="relative py-20 sm:py-28 md:py-32 overflow-hidden bg-bg-primary">
        <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10">
          <motion.div
            initial={{ opacity: 0, y: 30 }}
            whileInView={{ opacity: 1, y: 0 }}
            viewport={{ once: true, margin: '-80px' }}
            transition={{ duration: 0.3, ease: EASE_OUT }}
            className="max-w-3xl"
          >
            <div className="text-sm font-mono tracking-[0.2em] text-text-muted uppercase mb-6">
              Certifications
            </div>
            <h2 className="text-3xl sm:text-4xl md:text-5xl font-extrabold text-ink tracking-tight leading-[0.95] mb-10">
              资质与认证
            </h2>
            <div className="p-8 sm:p-10 border border-dashed border-border-primary bg-bg-secondary">
              <div className="flex items-center gap-2.5 mb-3">
                <Shield className="w-5 h-5 text-text-muted" />
                <span className="text-sm font-semibold text-ink">资质建设中</span>
              </div>
              <p className="text-sm text-text-muted leading-relaxed">
                公司资质与认证信息建设中，将随业务开展与取得进度陆续公示。
              </p>
            </div>
          </motion.div>
        </div>
      </section>
    );
  }

  return (
    <section className="relative py-20 sm:py-28 md:py-32 overflow-hidden bg-bg-primary">
      <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10">
        <div className="grid lg:grid-cols-2 gap-12 md:gap-16 lg:gap-20">
          {certifications.length > 0 && (
            <motion.div
              initial={{ opacity: 0, y: 30 }}
              whileInView={{ opacity: 1, y: 0 }}
              viewport={{ once: true, margin: '-80px' }}
              transition={{ duration: 0.3, ease: EASE_OUT }}
            >
              <div className="text-sm font-mono tracking-[0.2em] text-text-muted uppercase mb-6">
                Certifications
              </div>
              <h2 className="text-3xl sm:text-4xl md:text-5xl font-extrabold text-ink tracking-tight leading-[0.95] mb-10">
                资质与认证
              </h2>
              <div className="grid grid-cols-2 gap-4 md:gap-6">
                {certifications.map((cert, i) => {
                  const iconName = DEFAULT_CERT_ICON_NAMES[i % DEFAULT_CERT_ICON_NAMES.length] ?? 'Shield';
                  const Icon = ICON_MAP[iconName] ?? Shield;
                  return (
                    <div
                      key={cert.name}
                      className="p-5 sm:p-6 border border-border-primary bg-bg-primary hover:bg-bg-secondary hover:border-border-secondary transition-all duration-300"
                    >
                      <div className="w-10 h-10 flex items-center justify-center mb-4 text-text-secondary">
                        <Icon className="w-5 h-5" />
                      </div>
                      <div className="font-semibold text-ink mb-1">{cert.name}</div>
                      <div className="text-sm text-text-muted">{cert.description}</div>
                    </div>
                  );
                })}
              </div>
            </motion.div>
          )}

          {partners.length > 0 && (
            <motion.div
              initial={{ opacity: 0, y: 30 }}
              whileInView={{ opacity: 1, y: 0 }}
              viewport={{ once: true, margin: '-80px' }}
              transition={{ duration: 0.3, delay: 0.15, ease: EASE_OUT }}
            >
              <div className="text-sm font-mono tracking-[0.2em] text-text-muted uppercase mb-6">
                Partners
              </div>
              <h2 className="text-3xl sm:text-4xl md:text-5xl font-extrabold text-ink tracking-tight leading-[0.95] mb-10">
                生态合作伙伴
              </h2>
              <div className="grid grid-cols-2 sm:grid-cols-4 gap-3 md:gap-4">
                {partners.map((partner) => (
                  <div
                    key={partner}
                    className="aspect-[3/2] flex items-center justify-center border border-border-primary bg-bg-primary hover:bg-bg-secondary hover:border-border-secondary transition-all duration-300 group"
                  >
                    <span className="text-sm font-bold text-text-muted group-hover:text-text-secondary transition-colors duration-300">
                      {partner}
                    </span>
                  </div>
                ))}
              </div>
              <p className="mt-6 text-sm text-text-muted leading-relaxed">
                与主流软件厂商和云服务提供商建立合作，持续为客户提供可靠的技术方案与服务保障。
              </p>
            </motion.div>
          )}
        </div>
      </div>
    </section>
  );
}

function CTASection({ data }: { data: AboutData }) {
  return (
    <section className="relative py-20 sm:py-28 md:py-36 lg:py-44 overflow-hidden bg-bg-secondary">
      <div className="absolute top-0 left-0 right-0 h-px bg-border-primary" />

      <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10">
        <motion.div
          initial={{ opacity: 0, y: 30 }}
          whileInView={{ opacity: 1, y: 0 }}
          viewport={{ once: true, margin: '-80px' }}
          transition={{ duration: 0.3, ease: EASE_OUT }}
          className="max-w-3xl"
        >
          <h2 className="text-3xl sm:text-4xl md:text-5xl lg:text-6xl font-extrabold text-ink tracking-tight leading-[0.95] mb-8">
            {data.ctaTitle || ''}
          </h2>
          <p className="text-lg text-text-secondary leading-relaxed mb-10">
            {data.ctaDescription || ''}
          </p>
          <div className="flex flex-col sm:flex-row gap-4 sm:gap-6">
            <CTAButton href={data.ctaPrimaryHref || '#'} className="min-h-[52px] touch-manipulation">
              {data.ctaPrimaryLabel || '预约咨询'}
            </CTAButton>
            <CTAButton href={data.ctaSecondaryHref || '#'} variant="secondary" className="min-h-[52px] touch-manipulation">
              {data.ctaSecondaryLabel || '了解更多'}
            </CTAButton>
          </div>
        </motion.div>
      </div>
    </section>
  );
}

export default function AboutContentV4({ data }: { data: Record<string, unknown> }) {
  const aboutData = data as AboutData;

  // Empty state when no CMS data is available
  if (!data || Object.keys(data).length === 0) {
    return (
      <div className="min-h-screen bg-bg-primary flex items-center justify-center">
        <div className="text-text-muted text-lg">内容暂未发布</div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-bg-primary text-ink overflow-x-hidden">
      <HeroSection data={aboutData} />
      <MetricsStrip data={aboutData} />
      <WhoWeAreSection data={aboutData} />
      <MilestonesSection data={aboutData} />
      <CertificationsSection data={aboutData} />
      <CTASection data={aboutData} />
    </div>
  );
}