(function () {
  function runPageInits() {
    var inits = window.__tsPageInits || [];
    inits.forEach(function (fn) {
      if (typeof fn === 'function') {
        try {
          fn();
        } catch (err) {
          console.error('Page init failed', err);
        }
      }
    });
  }

  function buildPartialUrl(rawUrl) {
    var url = new URL(rawUrl, window.location.origin);
    url.searchParams.set('partial', '1');
    return url.toString();
  }

  function updateActiveLinks(pathname) {
    document.querySelectorAll('[data-partial-link="1"]').forEach(function (link) {
      var linkPath = new URL(link.href, window.location.origin).pathname.replace(/\/+/g, '/').replace(/\/$/, '') || '/';
      var currentPath = pathname.replace(/\/+/g, '/').replace(/\/$/, '') || '/';
      link.classList.toggle('active', linkPath === currentPath);
    });
  }

  function loadPartial(href, pushState) {
    var body = document.body;
    if (!body || !body.hasAttribute('data-partial-root')) {
      window.location.href = href;
      return;
    }
    if (window.__tsNavigating) {
      return;
    }
    var mainContent = document.querySelector('.main-content');
    if (!mainContent) {
      window.location.href = href;
      return;
    }
    window.__tsNavigating = true;
    body.classList.add('is-loading');
    fetch(buildPartialUrl(href), {
      headers: { 'X-Requested-With': 'TimesheetPartial' },
      credentials: 'same-origin'
    })
      .then(function (response) {
        if (!response.ok) {
          throw new Error('Failed to load content');
        }
        return response.text();
      })
      .then(function (html) {
        mainContent.innerHTML = html;
        if (pushState) {
          window.history.pushState({}, '', href);
        }
        updateActiveLinks(new URL(href, window.location.origin).pathname);
        runPageInits();
      })
      .catch(function () {
        window.location.href = href;
      })
      .finally(function () {
        body.classList.remove('is-loading');
        window.__tsNavigating = false;
      });
  }

  function bindPartialNavigation() {
    document.addEventListener('click', function (event) {
      if (event.defaultPrevented || event.button !== 0 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) {
        return;
      }
      var link = event.target.closest('a[data-partial-link="1"]');
      if (!link) {
        return;
      }
      var href = link.getAttribute('href');
      if (!href || href.startsWith('#')) {
        return;
      }
      var url = new URL(href, window.location.origin);
      if (url.origin !== window.location.origin) {
        return;
      }
      event.preventDefault();
      loadPartial(url.toString(), true);
    });

    window.addEventListener('popstate', function () {
      loadPartial(window.location.href, false);
    });
  }

  function init() {
    runPageInits();
    bindPartialNavigation();
  }

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', init);
  } else {
    init();
  }
})();