/* ==========================================================================
   ECOSISTEMA IDE — Cambio in-place + deep link por hash
   URLs válidas: #eco-excellence | #eco-projects | #eco-digital | #ecosistema
   ========================================================================== */
(function () {
  'use strict';

  const section = document.getElementById('ecosistema-ide');
  if (!section) return;

  const stateEcosystem = section.querySelector('[data-eco-state="ecosystem"]');
  const stateUnit      = section.querySelector('[data-eco-state="unit"]');
  const panels         = Array.from(section.querySelectorAll('[data-eco-panel]'));
  const triggers       = Array.from(section.querySelectorAll('[data-eco-open]'));
  const backBtn        = section.querySelector('[data-eco-close]');
  const pills          = Array.from(section.querySelectorAll('.eco-pill'));

  const VALID_UNITS    = ['excellence', 'projects', 'digital'];
  const HASH_PREFIX    = '#eco-';
  const HASH_ECOSYSTEM = '#ecosistema';

  let lastFocusedTrigger = null;
  let currentUnit = null; // null = ecosistema

  /* ---------- Utilidades de URL ---------- */
  function unitFromHash() {
    const h = window.location.hash;
    if (h === HASH_ECOSYSTEM) return null;
    if (h.startsWith(HASH_PREFIX)) {
      const id = h.slice(HASH_PREFIX.length);
      return VALID_UNITS.includes(id) ? id : null;
    }
    return null;
  }

  function hashForUnit(id) {
    return id ? HASH_PREFIX + id : HASH_ECOSYSTEM;
  }

  /* ---------- Render (no toca la URL) ---------- */
  function renderUnit(id) {
    const panel = panels.find(p => p.dataset.ecoPanel === id);
    if (!panel) return;

    const origin = triggers.find(t => t.dataset.ecoOpen === id);
    if (origin) lastFocusedTrigger = origin;

    stateEcosystem.hidden = true;
    stateUnit.hidden = false;

    panels.forEach(p => {
      const isActive = p.dataset.ecoPanel === id;
      p.hidden = !isActive;
      if (isActive) {
        p.style.animation = 'none';
        void p.offsetWidth; // reflow para reiniciar animación
        p.style.animation = '';
      }
    });

    triggers.forEach(t => {
      t.setAttribute('aria-expanded', t.dataset.ecoOpen === id ? 'true' : 'false');
    });

    pills.forEach(pill => {
      pill.classList.toggle('is-active', pill.dataset.ecoOpen === id);
    });

    const title = panel.querySelector('.eco-panel__title');
    if (title) {
      title.setAttribute('tabindex', '-1');
      requestAnimationFrame(() => title.focus({ preventScroll: false }));
    }

    currentUnit = id;
  }

  function renderEcosystem({ restoreFocus = true } = {}) {
    stateUnit.hidden = true;
    stateEcosystem.hidden = false;

    triggers.forEach(t => t.setAttribute('aria-expanded', 'false'));
    pills.forEach(p => p.classList.remove('is-active'));

    if (restoreFocus) {
      if (lastFocusedTrigger && typeof lastFocusedTrigger.focus === 'function') {
        lastFocusedTrigger.focus({ preventScroll: false });
      } else if (triggers[0]) {
        triggers[0].focus({ preventScroll: false });
      }
    }

    currentUnit = null;
  }

  /* ---------- API con URL ---------- */
  function openUnit(id, { push = true, scroll = true } = {}) {
    if (!VALID_UNITS.includes(id)) return;
    renderUnit(id);

    if (push) {
      const url = window.location.pathname + window.location.search + hashForUnit(id);
      history.pushState({ eco: id }, '', url);
    }

    if (scroll) {
      const rect = section.getBoundingClientRect();
      if (rect.top < -80 || rect.top > 200) {
        section.scrollIntoView({ behavior: 'smooth', block: 'start' });
      }
    }
  }

  function closeUnit({ push = true, scroll = false } = {}) {
    renderEcosystem();
    if (push) {
      const url = window.location.pathname + window.location.search + HASH_ECOSYSTEM;
      history.pushState({ eco: null }, '', url);
    }
    if (scroll) {
      section.scrollIntoView({ behavior: 'smooth', block: 'start' });
    }
  }

  /* ---------- Listeners de UI ---------- */
  triggers.forEach(trigger => {
    trigger.addEventListener('click', (e) => {
      const id = trigger.dataset.ecoOpen;
      if (!id) return;
      // Academy es <a href="academy.html">: dejamos navegar
      if (trigger.tagName === 'A' && trigger.getAttribute('href')) return;
      e.preventDefault();
      openUnit(id);
    });

    trigger.addEventListener('keydown', (e) => {
      if (e.key !== 'Enter' && e.key !== ' ') return;
      const id = trigger.dataset.ecoOpen;
      if (!id) return;
      if (trigger.tagName === 'A') return;
      e.preventDefault();
      openUnit(id);
    });
  });

  if (backBtn) backBtn.addEventListener('click', () => closeUnit({ scroll: true }));

  section.addEventListener('keydown', (e) => {
    if (e.key === 'Escape' && !stateUnit.hidden) closeUnit();
  });

  /* ---------- Sincronización con la URL ---------- */
  function syncFromLocation() {
    const id = unitFromHash();
    if (id && id !== currentUnit) {
      renderUnit(id);
    } else if (!id && currentUnit !== null) {
      renderEcosystem({ restoreFocus: false });
    }
  }

  // Carga inicial: si el hash trae unidad, abrir + scroll
  (function initFromUrl() {
    const id = unitFromHash();
    if (id) {
      renderUnit(id);
      requestAnimationFrame(() => {
        section.scrollIntoView({ behavior: 'auto', block: 'start' });
      });
    } else {
      renderEcosystem({ restoreFocus: false });
    }
  })();

  // Cambios manuales del hash (pegar link, editar barra, links compartidos)
  window.addEventListener('hashchange', syncFromLocation);

  // Atrás/adelante del navegador
  window.addEventListener('popstate', syncFromLocation);

  /* ---------- API pública opcional ---------- */
  window.EcoIDE = {
    open: openUnit,
    close: closeUnit,
    current: () => currentUnit,
  };
})();