/**
 * amiPro utils
 */

'use strict';

var _currentLang = null;
var _i18n_map = null;

function getCurrentLanguage() {
  if (_currentLang) return _currentLang;
  var stored = localStorage.getItem('amipro_lang');
  if (stored) { _currentLang = stored; return stored; }
  var browserLang = window.navigator.language || 'en';
  if (browserLang.indexOf('ja') === 0) return 'ja';
  return 'en';
}

function setLanguage(lang) {
  _currentLang = lang;
  localStorage.setItem('amipro_lang', lang);
  document.documentElement.lang = lang;
  if (_i18n_map) setI18NText(_i18n_map);
  updateImages(lang);
  var sel = document.getElementById('lang-selector');
  if (sel) sel.value = lang;
}

function updateImages(lang) {
  var heroImg = document.getElementById('hero-image');
  var searchImg = document.getElementById('search-image');
  
  if (heroImg) {
    if (lang === 'ja') {
      heroImg.src = 'contextwizard-files/cw-banner-jp.png';
    } else {
      heroImg.src = 'contextwizard-files/screen-platforms-640-400.jpg';
    }
  }
  
  if (searchImg) {
    if (lang === 'ja') {
      searchImg.src = 'contextwizard-files/screen-search-640-400-jp.jpg';
    } else {
      searchImg.src = 'contextwizard-files/screen-search-640-400.jpg';
    }
  }
}

function setI18NText(i18n_map){
  _i18n_map = i18n_map;
  var lang = getCurrentLanguage();
  for (const key of i18n_map.keys()) {
    const elm = $("#"+key);
    if(elm){
      var elem = i18n_map.get(key) 
      var msg = null
      if(elem){
        msg = elem.get(lang)
        if(!msg) msg = elem.get('en');
        if(!msg) msg = elem.get('en-US');
      }
      if(!msg)msg = key+"-"+lang
      
      $("#"+key).html(msg);
    }
  }
}

function getI18NText(i18n_map, key){
  var lang = getCurrentLanguage();
  var elem = i18n_map.get(key) 
  var msg = null
  if(elem){
    msg = elem.get(lang)
    if(!msg) msg = elem.get('en');
    if(!msg) msg = elem.get('en-US');
  }
  if(!msg)msg = key+"-"+lang
  
  return msg  
}

function createLanguageSelector() {
  var current = getCurrentLanguage();
  var wrapper = document.createElement('div');
  wrapper.className = 'lang-selector-wrapper lang-selector-floating';
  wrapper.id = 'lang-selector-draggable';
  wrapper.innerHTML = '<select id="lang-selector" class="lang-selector" onchange="setLanguage(this.value)">' +
    '<option value="en"' + (current === 'en' ? ' selected' : '') + '>EN</option>' +
    '<option value="ja"' + (current === 'ja' ? ' selected' : '') + '>JA</option>' +
    '</select>';
  
  var savedPos = localStorage.getItem('amipro_lang_pos');
  if (savedPos) {
    try {
      var pos = JSON.parse(savedPos);
      wrapper.style.left = pos.x + 'px';
      wrapper.style.top = pos.y + 'px';
      wrapper.style.right = 'auto';
    } catch(e) {}
  }
  
  makeDraggable(wrapper);
  return wrapper;
}

function makeDraggable(el) {
  var isDragging = false;
  var startX, startY, startLeft, startTop;
  
  el.style.cursor = 'grab';
  
  el.addEventListener('mousedown', function(e) {
    if (e.target.tagName === 'SELECT') return;
    isDragging = true;
    startX = e.clientX;
    startY = e.clientY;
    startLeft = el.offsetLeft;
    startTop = el.offsetTop;
    el.style.cursor = 'grabbing';
    el.style.right = 'auto';
    e.preventDefault();
  });
  
  document.addEventListener('mousemove', function(e) {
    if (!isDragging) return;
    var dx = e.clientX - startX;
    var dy = e.clientY - startY;
    var newLeft = startLeft + dx;
    var newTop = startTop + dy;
    
    newLeft = Math.max(0, Math.min(newLeft, window.innerWidth - el.offsetWidth));
    newTop = Math.max(0, Math.min(newTop, window.innerHeight - el.offsetHeight));
    
    el.style.left = newLeft + 'px';
    el.style.top = newTop + 'px';
  });
  
  document.addEventListener('mouseup', function() {
    if (!isDragging) return;
    isDragging = false;
    el.style.cursor = 'grab';
    localStorage.setItem('amipro_lang_pos', JSON.stringify({
      x: el.offsetLeft,
      y: el.offsetTop
    }));
  });
  
  el.addEventListener('touchstart', function(e) {
    if (e.target.tagName === 'SELECT') return;
    isDragging = true;
    startX = e.touches[0].clientX;
    startY = e.touches[0].clientY;
    startLeft = el.offsetLeft;
    startTop = el.offsetTop;
    el.style.right = 'auto';
  }, { passive: true });
  
  document.addEventListener('touchmove', function(e) {
    if (!isDragging) return;
    var dx = e.touches[0].clientX - startX;
    var dy = e.touches[0].clientY - startY;
    var newLeft = startLeft + dx;
    var newTop = startTop + dy;
    
    newLeft = Math.max(0, Math.min(newLeft, window.innerWidth - el.offsetWidth));
    newTop = Math.max(0, Math.min(newTop, window.innerHeight - el.offsetHeight));
    
    el.style.left = newLeft + 'px';
    el.style.top = newTop + 'px';
  }, { passive: true });
  
  document.addEventListener('touchend', function() {
    if (!isDragging) return;
    isDragging = false;
    localStorage.setItem('amipro_lang_pos', JSON.stringify({
      x: el.offsetLeft,
      y: el.offsetTop
    }));
  });
}

function initRevealAnimations(){
  const animated = document.querySelectorAll('.reveal, [data-animate]');
  if(!animated || animated.length === 0){
    return;
  }
  if(!('IntersectionObserver' in globalThis)){
    for (const el of animated) {
      el.classList.add('is-visible');
    }
    return;
  }
  const observer = new IntersectionObserver(function(entries){
    for (const entry of entries) {
      if(entry.isIntersecting){
        entry.target.classList.add('is-visible');
        observer.unobserve(entry.target);
      }
    }
  }, {threshold: 0.18});
  for (const el of animated) {
    el.classList.add('reveal');
    observer.observe(el);
  }
}