// /web/js/aquadrop-analytics.js
(function(){
  window.dataLayer = window.dataLayer || [];
  function dl(obj){ window.dataLayer.push(obj); }

  // 外部リンク判定
  function isExternal(url){
    try {
      var a = document.createElement('a');
      a.href = url;
      return a.hostname && a.hostname !== location.hostname;
    } catch(e){ return false; }
  }

  // 1) CTAクリック（予約・問い合わせなど）
  function trackCTA(name, params){
    dl(Object.assign({
      event: 'cta_click',
      cta_name: name || '',
      page_path: location.pathname,
      page_title: document.title
    }, params || {}));
  }

  // 2) 電話クリック
  function bindTelClicks(){
    document.querySelectorAll('a[href^="tel:"]').forEach(function(a){
      a.addEventListener('click', function(){
        dl({
          event: 'call_click',
          phone: (a.getAttribute('href')||'').replace('tel:',''),
          page_path: location.pathname
        });
      });
    });
  }

  // 3) 外部リンク（アソビュー・LINEなど）
  function bindOutboundLinks(){
    document.querySelectorAll('a[href]').forEach(function(a){
      var href = a.getAttribute('href');
      if(!href) return;
      if(href.indexOf('javascript:') === 0) return;
      if(isExternal(href)){
        a.addEventListener('click', function(){
          dl({
            event: 'outbound_click',
            link_url: href,
            link_text: (a.textContent||'').trim().slice(0,100),
            page_path: location.pathname
          });
        });
      }
    });
  }

  // 4) スクロール深度（25/50/75/100）
  function bindScrollDepth(){
    var marks = {25:false,50:false,75:false,100:false};
    function onScroll(){
      var h = Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
      var pos = (window.scrollY + window.innerHeight) / h * 100;
      [25,50,75,100].forEach(function(p){
        if(!marks[p] && pos >= p){
          marks[p] = true;
          dl({ event: 'scroll_depth', percent: p, page_path: location.pathname });
        }
      });
      if(marks[100]) window.removeEventListener('scroll', onScroll);
    }
    window.addEventListener('scroll', onScroll);
  }

  // 5) フォーム送信成功（完了ページで呼び出し）
  function formSubmitSuccess(name){
    dl({ event: 'form_submit_success', form_name: name || 'unknown', page_path: location.pathname });
  }

  // 初期化
  document.addEventListener('DOMContentLoaded', function(){
    bindTelClicks();
    bindOutboundLinks();
    bindScrollDepth();
  });

  window.AquaTrack = {
    trackCTA: trackCTA,
    formSubmitSuccess: formSubmitSuccess
  };
})();