'use client';

import * as React from 'react';
import { useScroll, useTransform, m } from 'framer-motion';
import { Building2, Compass, Layers, ArrowDownToLine, Wrench, Factory, Zap, MapPin, CheckCircle2 } from 'lucide-react';
import { useTranslations } from 'next-intl';

const iconMap: Record<string, React.ElementType> = {
  Building2,
  Compass,
  Layers,
  ArrowDownToLine,
  Wrench,
  Factory,
  Zap,
  MapPin,
  CheckCircle2
};

interface Milestone {
  date: string;
  year: string;
  title: string;
  desc: string;
  iconName: string;
}

interface CompanyTimelineProps {
  badge?: string;
  title?: string;
  milestones?: Milestone[];
}

export function CompanyTimeline({ 
  badge, 
  title, 
  milestones 
}: CompanyTimelineProps) {
  const t = useTranslations('CompanyTimeline');
  
  const finalBadge = badge || t('badge');
  const finalTitle = title || t('title');
  
  const finalMilestones = milestones || [
    {
      date: '16.12.2015',
      year: '2015',
      title: t('milestones.2015.title'),
      desc: t('milestones.2015.desc'),
      iconName: 'Building2',
    },
    {
      date: '04.02.2019',
      year: '2019',
      title: t('milestones.2019_ing.title'),
      desc: t('milestones.2019_ing.desc'),
      iconName: 'Compass',
    },
    {
      date: '14.11.2019',
      year: '2019',
      title: t('milestones.2019_verw.title'),
      desc: t('milestones.2019_verw.desc'),
      iconName: 'Layers',
    },
    {
      date: '21.10.2025',
      year: '2025',
      title: t('milestones.2025.title'),
      desc: t('milestones.2025.desc'),
      iconName: 'ArrowDownToLine',
    },
  ];
  const containerRef = React.useRef<HTMLDivElement>(null);
  const { scrollYProgress } = useScroll({
    target: containerRef,
    offset: ["start center", "end center"]
  });

  const lineHeight = useTransform(scrollYProgress, [0, 1], ["0%", "100%"]);

  return (
    <section className="py-16 md:py-24 lg:py-32 bg-[#FAFAFA] relative overflow-hidden">
      {/* Background Decor */}
      <div className="absolute top-0 right-0 w-[600px] h-[600px] bg-primary/5 rounded-full blur-[100px] pointer-events-none -translate-y-1/2 translate-x-1/3" />
      <div className="absolute bottom-0 left-0 w-[800px] h-[800px] bg-neutral-200/40 rounded-full blur-[120px] pointer-events-none translate-y-1/3 -translate-x-1/3" />

      <div className="container max-w-5xl relative z-10">
        <div className="text-center mb-12 md:mb-24">
          <div className="inline-flex items-center gap-2 px-3 py-1.5 rounded-full bg-white border border-neutral-200 text-neutral-dark text-xs font-bold uppercase tracking-wider mb-6 shadow-sm">
            <span className="w-2 h-2 rounded-full bg-primary animate-pulse" />
            {finalBadge}
          </div>
          <h3 className="font-heading text-3xl md:text-5xl lg:text-6xl font-extrabold text-neutral-dark tracking-tight">
            {finalTitle}
          </h3>
        </div>

        <div ref={containerRef} className="relative">
          {/* Central Line Background */}
          <div className="absolute left-[38px] md:left-1/2 top-0 bottom-0 w-1.5 bg-neutral-200 -translate-x-1/2 rounded-full" />
          
          {/* Animated Central Line */}
          <div className="absolute left-[38px] md:left-1/2 top-0 bottom-0 w-1.5 -translate-x-1/2 rounded-full overflow-hidden">
            <m.div 
              className="w-full bg-primary drop-shadow-[0_0_8px_rgba(130,237,32,0.8)]"
              style={{ height: lineHeight }}
            />
          </div>

          <div className="space-y-16 md:space-y-24">
            {finalMilestones.map((milestone, i) => {
              const isEven = i % 2 === 0;
              const Icon = iconMap[milestone.iconName] || Building2;
              
              return (
                <m.div 
                  key={i}
                  initial={{ opacity: 0, y: 20 }}
                  whileInView={{ opacity: 1, y: 0 }}
                  viewport={{ once: true, margin: "-50px" }}
                  transition={{ duration: 1.0, ease: [0.16, 1, 0.3, 1] }}
                  className="relative flex flex-col md:flex-row items-center w-full group"
                >
                  {/* Timeline Dot with Pulse */}
                  <div className="absolute left-[38px] md:left-1/2 top-0 md:top-1/2 w-8 h-8 rounded-full bg-white border-[5px] border-neutral-200 group-hover:border-primary transition-colors duration-500 z-20 -translate-x-1/2 md:-translate-y-1/2 shadow-sm flex items-center justify-center">
                    <div className="w-2 h-2 rounded-full bg-neutral-300 group-hover:bg-primary transition-colors duration-500" />
                  </div>
                  
                  {/* Content Box Wrapper */}
                  <div className={`w-full md:w-1/2 pl-24 md:pl-0 ${isEven ? 'md:pr-16 md:text-right' : 'md:pl-16 md:ml-auto md:text-left'}`}>
                    
                    {/* The Card */}
                    <div className="relative bg-white p-8 md:p-10 rounded-[2rem] shadow-[0_8px_30px_rgb(0,0,0,0.04)] border border-neutral-100 hover:shadow-[0_20px_40px_rgb(0,0,0,0.08)] hover:border-primary/20 transition-all duration-500 overflow-hidden transform hover:-translate-y-1">
                      
                      {/* Giant Typography Background Year */}
                      <div className={`absolute select-none pointer-events-none text-[140px] leading-none font-black text-neutral-50 z-0 ${isEven ? '-left-8' : '-right-8'} -bottom-10 opacity-70 group-hover:scale-110 transition-transform duration-700`}>
                        {milestone.year}
                      </div>

                      <div className="relative z-10">
                        {/* Header Row */}
                        <div className={`flex items-center gap-4 mb-6 ${isEven ? 'md:flex-row-reverse' : ''}`}>
                          <div className="w-12 h-12 rounded-2xl bg-primary/10 text-primary flex items-center justify-center shrink-0 group-hover:bg-primary group-hover:text-neutral-dark transition-colors duration-500">
                            <Icon className="w-6 h-6" />
                          </div>
                          <span className="inline-block py-1.5 px-4 rounded-full bg-neutral-100 text-neutral-600 font-bold text-sm tracking-wide">
                            {milestone.date}
                          </span>
                        </div>
                        
                        <h4 className="font-heading font-extrabold text-2xl md:text-3xl mb-4 text-neutral-dark leading-tight group-hover:text-primary transition-colors duration-300">
                          {milestone.title}
                        </h4>
                        <p className="text-neutral-500 text-lg leading-relaxed">
                          {milestone.desc}
                        </p>
                      </div>
                    </div>

                  </div>
                </m.div>
              );
            })}
          </div>
        </div>
      </div>
    </section>
  );
}