---
// "Cómo trabajamos" — Timeline with GSAP ScrollTrigger progress bar
// Phase 4 — Organic Fluidity Premium
import SectionEyebrow from './SectionEyebrow.astro';
import type { TranslationKey } from '@/i18n/ui';
import gsap from 'gsap';
import { ScrollTrigger } from 'gsap/ScrollTrigger';

gsap.registerPlugin(ScrollTrigger);

interface Props {
  t: (key: TranslationKey) => string;
}
const { t } = Astro.props;

const steps = [
  { num: '01', titleKey: 'process.step1.title' as TranslationKey, bodyKey: 'process.step1.body' as TranslationKey },
  { num: '02', titleKey: 'process.step2.title' as TranslationKey, bodyKey: 'process.step2.body' as TranslationKey },
  { num: '03', titleKey: 'process.step3.title' as TranslationKey, bodyKey: 'process.step3.body' as TranslationKey },
  { num: '04', titleKey: 'process.step4.title' as TranslationKey, bodyKey: 'process.step4.body' as TranslationKey },
];
---
<section class="py-24 md:py-32 relative overflow-hidden" style="background: var(--hds-bg-soft);" id="como-trabajamos">
  <div class="absolute inset-0 pointer-events-none" style="background: var(--hds-gradient-section);" aria-hidden="true"></div>

  <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
    <div class="max-w-3xl mb-16 md:mb-20 reveal">
      <SectionEyebrow text={t('process.eyebrow')} />
      <h2 class="font-display leading-tight mt-5" style="font-size: clamp(2rem, 5vw, 3.5rem); color: var(--hds-fg);">
        {t('process.title')}
      </h2>
    </div>

    <!-- Timeline with progress bar -->
    <div class="process-timeline">
      <!-- Vertical progress bar track -->
      <div class="process-progress-track" aria-hidden="true">
        <div id="process-progress-fill" class="process-progress-fill"></div>
      </div>

      <div class="process-steps">
        {steps.map((step, i) => (
          <div id={`process-step-${i}`} class="process-step-wrap">
            <article class="glass-card process-step-card p-8 md:p-10">
              <div class="flex items-start gap-6">
                <div class="font-display leading-none flex-shrink-0" style="font-size: 3.5rem; color: var(--color-hds-naranja); font-weight: 500; opacity: 0.9;">
                  {step.num}
                </div>
                <div>
                  <h3 class="text-xl md:text-2xl font-semibold mb-3" style="color: var(--hds-fg);">
                    {t(step.titleKey)}
                  </h3>
                  <p class="text-[15px] md:text-base leading-relaxed" style="color: var(--hds-fg-soft);">
                    {t(step.bodyKey)}
                  </p>
                </div>
              </div>
            </article>
          </div>
        ))}
      </div>
    </div>
  </div>
</section>

<script>
  import gsap from 'gsap';
  import { ScrollTrigger } from 'gsap/ScrollTrigger';

  gsap.registerPlugin(ScrollTrigger);

  const prefersReduced = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  if (!prefersReduced) {
    const steps = document.querySelectorAll('.process-step-card');
    const progressFill = document.getElementById('process-progress-fill');

    if (steps.length && progressFill) {
      // Animate progress bar as user scrolls through the section
      ScrollTrigger.create({
        trigger: '.process-steps',
        start: 'top 70%',
        end: 'bottom bottom',
        onUpdate: (self) => {
          progressFill.style.setProperty('--progress', `${self.progress * 100}%`);
        },
      });

      // Stagger reveal each step card
      gsap.from('.process-step-card', {
        scrollTrigger: {
          trigger: '.process-steps',
          start: 'top 75%',
          toggleActions: 'play none none none',
        },
        opacity: 0,
        x: -30,
        duration: 0.7,
        stagger: 0.15,
        ease: 'power3.out',
      });
    }
  }
</script>

<style>
  .process-timeline {
    display: flex;
    gap: 2rem;
    max-width: 48rem;
    margin: 0 auto;
  }

  .process-progress-track {
    flex-shrink: 0;
    width: 3px;
    border-radius: 3px;
    background: var(--hds-line);
    position: relative;
    margin-top: 0;
  }

  .process-progress-fill {
    position: sticky;
    top: 0;
    width: 100%;
    height: 40vh;
    background: var(--color-hds-naranja);
    border-radius: inherit;
    clip-path: inset(0 0 calc(100% - var(--progress, 0%)) 0);
    transition: clip-path 0.1s linear;
  }

  .process-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    flex-grow: 1;
  }

  .process-step-card {
    width: 100%;
  }

  @media (max-width: 767px) {
    .process-timeline {
      gap: 1rem;
    }
    .process-progress-track {
      width: 2px;
    }
  }
</style>