function isInteractiveTouchTarget(target) {
  if (!target || typeof target.closest !== 'function') {
    return false;
  }
  return Boolean(target.closest('a, button, input, select, textarea, summary, details, label, form'));
}

function attachSwipeNavigation(target, prevUrl, nextUrl) {
  if (!target || !prevUrl || !nextUrl) {
    return;
  }

  const minSwipeDistance = 60;
  const maxVerticalRatio = 1.25;
  const maxSwipeDuration = 900;
  let startX = 0;
  let startY = 0;
  let startAt = 0;
  let tracking = false;
  let navigating = false;

  target.addEventListener('touchstart', (event) => {
    if (event.touches.length !== 1 || isInteractiveTouchTarget(event.target)) {
      tracking = false;
      return;
    }

    const touch = event.touches[0];
    startX = touch.clientX;
    startY = touch.clientY;
    startAt = Date.now();
    tracking = true;
  }, { passive: true });

  target.addEventListener('touchend', (event) => {
    if (!tracking || navigating || event.changedTouches.length !== 1) {
      tracking = false;
      return;
    }

    tracking = false;
    const touch = event.changedTouches[0];
    const deltaX = touch.clientX - startX;
    const deltaY = touch.clientY - startY;
    const absX = Math.abs(deltaX);
    const absY = Math.abs(deltaY);
    const duration = Date.now() - startAt;

    if (duration > maxSwipeDuration || absX < minSwipeDistance || absX <= absY * maxVerticalRatio) {
      return;
    }

    navigating = true;
    if (deltaX < 0) {
      window.location.assign(nextUrl);
    } else {
      window.location.assign(prevUrl);
    }
  }, { passive: true });
}

function initSwipeNavigation() {
  if (!window.matchMedia('(pointer: coarse)').matches && !('ontouchstart' in window)) {
    return;
  }

  document.querySelectorAll('[data-component="swipe-nav"]').forEach((node) => {
    attachSwipeNavigation(node, node.dataset.prevUrl, node.dataset.nextUrl);
  });
}

function initWarningBanner() {
  const warningBanner = document.querySelector('[data-component="workhours-warning"]');
  if (!warningBanner) {
    return;
  }

  const warningKey = warningBanner.getAttribute('data-workhours-warning') || '';
  const storageKey = warningKey ? `workhours-warning-dismissed:${warningKey}` : '';

  if (storageKey && window.localStorage.getItem(storageKey) === '1') {
    warningBanner.remove();
    return;
  }

  const closeButton = warningBanner.querySelector('[data-action="warning-close"]');
  if (closeButton) {
    closeButton.addEventListener('click', () => {
      warningBanner.remove();
      if (storageKey) {
        window.localStorage.setItem(storageKey, '1');
      }
    });
  }
}

function initWeeklyTargetEditor() {
  const form = document.querySelector('.weekly-target-form');
  const editor = document.querySelector('[data-component="weekly-target-editor"]');
  const toggleButtons = document.querySelectorAll('.js-toggle-weekly-target-editor');

  if (form && toggleButtons.length && editor) {
    toggleButtons.forEach((toggleButton) => {
      toggleButton.addEventListener('click', () => {
        editor.classList.toggle('is-hidden');
      });
    });
  }

  if (!form) {
    return;
  }

  form.addEventListener('submit', (event) => {
    const scopeSelect = form.querySelector("select[name='scope']");
    const hoursInput = form.querySelector("input[name='weekly_target_hours']");
    if (!scopeSelect || !hoursInput) {
      return;
    }

    const scope = scopeSelect.value;
    const hours = hoursInput.value;
    let scopeText = '';

    if (scope === 'current_week') {
      scopeText = 'Nur die aktuell ausgewählte Woche';
    } else if (scope === 'all_weeks') {
      scopeText = 'Alle Wochen (Vergangenheit und Zukunft)';
    } else if (scope === 'from_current_week') {
      scopeText = 'Aktuelle Woche und alle zukünftigen Wochen';
    }

    if (!scopeText) {
      return;
    }

    const confirmed = window.confirm(`Wochen-Soll wirklich ändern?\nNeuer Wert: ${hours} h\nGültigkeit: ${scopeText}`);
    if (!confirmed) {
      event.preventDefault();
      return;
    }

    if (editor) {
      editor.classList.add('is-hidden');
    }
  });
}

export function initDashboard() {
  initSwipeNavigation();
  initWarningBanner();
  initWeeklyTargetEditor();
}