/**
 * AKSRT Yiyan — 一言轮播组件
 *
 * Fetches random quotes from hitokoto.cn API and auto-rotates.
 *
 * @package AKSRT
 */

(function () {
  'use strict';

  function initYiyan(el) {
    if (el.dataset.yiyanBound) return;
    el.dataset.yiyanBound = '1';

    var count = parseInt(el.dataset.count || '5', 10);
    var interval = parseInt(el.dataset.interval || '5', 10) * 1000;
    var type = el.dataset.type || 'a';
    var textEl = el.querySelector('.aksrt-yiyan__text');
    var fromEl = el.querySelector('.aksrt-yiyan__from');
    var dotsEl = el.querySelector('.aksrt-yiyan__dots');
    var quotes = [];
    var currentIndex = 0;
    var timer = null;

    function showQuote(index) {
      if (!quotes.length || !textEl) return;
      var q = quotes[index % quotes.length];
      textEl.style.opacity = '0';
      setTimeout(function () {
        textEl.textContent = '"' + q.text + '"';
        textEl.style.opacity = '1';
        if (fromEl) {
          fromEl.textContent = q.from ? '—— ' + q.from : '';
        }
      }, 200);

      // Update dots
      if (dotsEl) {
        dotsEl.querySelectorAll('.aksrt-yiyan__dot').forEach(function (dot, i) {
          dot.classList.toggle('is-active', i === index % quotes.length);
        });
      }
    }

    function nextQuote() {
      currentIndex = (currentIndex + 1) % quotes.length;
      showQuote(currentIndex);
    }

    function fetchQuotes() {
      var url = 'https://v1.hitokoto.cn/?c=' + encodeURIComponent(type) + '&encode=json&count=' + count;
      fetch(url)
        .then(function (r) { return r.json(); })
        .then(function (data) {
          // API returns single object or array
          if (Array.isArray(data)) {
            quotes = data.map(function (item) {
              return { text: item.hitokoto || '', from: item.from || '' };
            });
          } else if (data && data.hitokoto) {
            quotes = [{ text: data.hitokoto, from: data.from || '' }];
          }

          if (!quotes.length) {
            if (textEl) textEl.textContent = '暂无内容';
            return;
          }

          // Build dots
          if (dotsEl && quotes.length > 1) {
            dotsEl.innerHTML = '';
            quotes.forEach(function (_, i) {
              var dot = document.createElement('span');
              dot.className = 'aksrt-yiyan__dot' + (i === 0 ? ' is-active' : '');
              dotsEl.appendChild(dot);
            });
          }

          showQuote(0);

          // Auto-rotate
          if (quotes.length > 1) {
            timer = setInterval(nextQuote, interval);
          }
        })
        .catch(function () {
          if (textEl) textEl.textContent = '加载失败，请稍后再试';
        });
    }

    // Pause on hover
    el.addEventListener('mouseenter', function () {
      if (timer) clearInterval(timer);
    });
    el.addEventListener('mouseleave', function () {
      if (quotes.length > 1) {
        timer = setInterval(nextQuote, interval);
      }
    });

    fetchQuotes();
  }

  // Auto-init all yiyan widgets
  document.addEventListener('DOMContentLoaded', function () {
    document.querySelectorAll('[data-aksrt-yiyan]').forEach(initYiyan);
  });
})();