/* 简航 SimpleNav —— 后台交互 */
(function () {
  'use strict';
  var $ = function (s, r) { return (r || document).querySelector(s); };
  var $$ = function (s, r) { return Array.prototype.slice.call((r || document).querySelectorAll(s)); };

  /* ---------- 显示图标预览 ---------- */
  function setPreview(src) {
    var box = $('#f-icon-preview');
    if (!box) return;
    box.innerHTML = src ? '<img src="' + src + '" alt="">' : '<span class="ph">无</span>';
  }

  /* ---------- 自动获取网站信息 ---------- */
  var fetchBtn = $('#btn-fetch');
  if (fetchBtn) {
    fetchBtn.addEventListener('click', function () {
      var url = ($('#f-url') || {}).value || '';
      var hint = $('#fetch-hint');
      if (!url) { if (hint) hint.textContent = '请先填写网址'; return; }
      if (hint) hint.textContent = '正在获取标题与高清图标…';
      fetchBtn.disabled = true;
      fetch(fetchBtn.getAttribute('data-url') + '?url=' + encodeURIComponent(url))
        .then(function (r) { return r.json(); })
        .then(function (d) {
          fetchBtn.disabled = false;
          if (!d.ok) { if (hint) hint.textContent = d.msg || '获取失败'; return; }
          if ($('#f-name')) $('#f-name').value = d.name || '';
          if ($('#f-short') && !$('#f-short').value) $('#f-short').value = d.short || d.name || '';

          var auto = $('#f-icon-auto');
          var locked = auto && !auto.checked;
          if (!locked) {
            if ($('#f-icon')) $('#f-icon').value = d.icon || '';
            setPreview(d.icon_url || '');
          }
          var parts = ['已获取名称'];
          parts.push(d.icon ? ('已获取图标（候选 ' + (d.candidates || 1) + ' 个）') : '未找到图标，将回退为首字母块');
          if (locked) parts.push('（当前为自定义图标，未覆盖）');
          if (hint) hint.textContent = parts.join('，');
        })
        .catch(function () { fetchBtn.disabled = false; if (hint) hint.textContent = '网络错误'; });
    });
  }

  /* ---------- 图标：上传文件 / 自定义地址 ---------- */
  var fileInput = $('#f-icon-file');
  if (fileInput) {
    fileInput.addEventListener('change', function () {
      var f = fileInput.files && fileInput.files[0];
      if (!f) return;
      var auto = $('#f-icon-auto');
      if (auto) auto.checked = false;          // 一旦自定义，自动取消「允许自动更新」
      if (window.URL && URL.createObjectURL) { setPreview(URL.createObjectURL(f)); }
      var hint = $('#fetch-hint');
      if (hint) hint.textContent = '已选择本地图标：' + f.name + '（保存后生效，并将锁定不再自动更新）';
    });
  }
  var urlInput = $('#f-icon-url');
  if (urlInput) {
    urlInput.addEventListener('change', function () {
      var v = urlInput.value.trim();
      if (!v) return;
      var auto = $('#f-icon-auto');
      if (auto) auto.checked = false;
      setPreview(v);
    });
  }
  var autoBox = $('#f-icon-auto');
  if (autoBox) {
    autoBox.addEventListener('change', function () {
      var hint = $('#fetch-hint');
      if (!hint) return;
      hint.textContent = autoBox.checked
        ? '已开启自动更新：该网站图标会在「全部更新」时刷新'
        : '已关闭自动更新：该网站图标将被锁定';
    });
  }

  /* ---------- 清空表单 ---------- */
  var resetBtn = $('#btn-reset');
  if (resetBtn) {
    resetBtn.addEventListener('click', function () {
      ['f-id', 'f-url', 'f-name', 'f-short', 'f-icon', 'f-icon-url'].forEach(function (id) {
        var el = $('#' + id); if (el) el.value = id === 'f-id' ? '0' : '';
      });
      var fi = $('#f-icon-file'); if (fi) fi.value = '';
      var v = $('#f-visible'); if (v) v.checked = true;
      var a = $('#f-icon-auto'); if (a) a.checked = true;
      var h = $('#fetch-hint'); if (h) h.textContent = '';
      setPreview('');
    });
  }

  /* ---------- 编辑网站：回填表单 ---------- */
  $$('.edit-site').forEach(function (btn) {
    btn.addEventListener('click', function () {
      var d = btn.dataset;
      $('#f-id').value = d.id;
      $('#f-group').value = d.group;
      $('#f-url').value = d.url;
      $('#f-name').value = d.name;
      $('#f-short').value = d.short;
      $('#f-icon').value = d.icon;
      if ($('#f-icon-url')) $('#f-icon-url').value = '';
      if ($('#f-icon-file')) $('#f-icon-file').value = '';
      if ($('#f-icon-auto')) $('#f-icon-auto').checked = d.custom !== '1';
      $('#f-visible').checked = d.visible === '1';
      setPreview(d.iconUrl || '');
      var hint = $('#fetch-hint');
      if (hint) hint.textContent = d.custom === '1' ? '该网站图标为自定义，不会被「全部更新」覆盖' : '';
      window.scrollTo({ top: 0, behavior: 'smooth' });
    });
  });

  /* ---------- 编辑板块 / 引擎 ---------- */
  $$('.edit-group').forEach(function (btn) {
    btn.addEventListener('click', function () {
      var d = btn.dataset;
      $('#g-id').value = d.id; $('#g-name').value = d.name;
      $('#g-display').value = d.display; $('#g-visible').checked = d.visible === '1';
      window.scrollTo({ top: 0, behavior: 'smooth' });
    });
  });
  var gReset = $('#g-reset');
  if (gReset) gReset.addEventListener('click', function () { $('#g-id').value = '0'; $('#g-name').value = ''; $('#g-display').value = 'grid'; $('#g-visible').checked = true; });

  $$('.edit-engine').forEach(function (btn) {
    btn.addEventListener('click', function () {
      var d = btn.dataset;
      $('#e-id').value = d.id; $('#e-name').value = d.name; $('#e-slug').value = d.slug;
      $('#e-search').value = d.search; $('#e-param').value = d.param; $('#e-sug').value = d.sug;
      $('#e-sugtype').value = d.sugtype; $('#e-color').value = d.color; $('#e-active').checked = d.active === '1';
      window.scrollTo({ top: 0, behavior: 'smooth' });
    });
  });
  var eReset = $('#e-reset');
  if (eReset) eReset.addEventListener('click', function () {
    ['e-id', 'e-name', 'e-slug', 'e-search', 'e-sug', 'e-color'].forEach(function (id) { var el = $('#' + id); if (el) el.value = id === 'e-id' ? '0' : ''; });
    $('#e-param').value = 'q'; $('#e-active').checked = false;
  });

  /* ---------- 列表内「显示 / 隐藏」原地切换（不跳页） ---------- */
  $$('form.js-toggle').forEach(function (form) {
    form.addEventListener('submit', function (ev) {
      var btn = $('button.toggle', form);
      if (btn) btn.disabled = true;
      ev.preventDefault();
      fetch(form.getAttribute('action'), {
        method: 'POST',
        body: new FormData(form),
        credentials: 'same-origin',
        headers: { 'X-Requested-With': 'XMLHttpRequest' }
      })
        .then(function (r) { return r.json(); })
        .then(function (d) {
          if (btn) btn.disabled = false;
          if (!d || !d.ok) { alert((d && d.msg) || '切换失败'); return; }
          applyToggleState(form, d.state);
        })
        .catch(function () {
          if (btn) btn.disabled = false;
          // AJAX 失败时退回普通提交，保证功能可用（表单已带 p，会回到当前页）
          var ajax = form.querySelector('input[name="ajax"]');
          if (ajax) { ajax.parentNode.removeChild(ajax); }
          form.submit();
        });
    });
  });

  function applyToggleState(form, state) {
    var on = state === 1;
    var btn = $('button.toggle', form);
    if (btn) {
      btn.classList.toggle('on', on);
      btn.setAttribute('data-on', on ? '1' : '0');
      btn.setAttribute('title', on ? '当前：显示中（点击隐藏）' : '当前：已隐藏（点击显示）');
      var svg = btn.querySelector('path[stroke]');
      var circle = btn.querySelector('circle');
      if (on) {
        if (svg) svg.remove();
      } else if (circle && !svg) {
        var p = document.createElementNS('http://www.w3.org/2000/svg', 'path');
        p.setAttribute('d', 'M3 3l18 18');
        p.setAttribute('stroke', 'currentColor');
        p.setAttribute('stroke-width', '2');
        p.setAttribute('stroke-linecap', 'round');
        btn.querySelector('svg').appendChild(p);
      }
    }
    // 同行的状态文字（如搜索引擎的「已显示 / 已隐藏」）
    var cell = form.closest('td') || form.parentNode;
    var st = cell ? $('.js-state', cell) : null;
    if (st) {
      st.textContent = on ? (st.dataset.onText || '已显示') : (st.dataset.offText || '已隐藏');
      st.classList.toggle('on', on);
      st.classList.toggle('off', !on);
    }
    var row = form.closest('tr');
    if (row) {
      row.classList.toggle('row-off', !on);
    }
  }

  /* ---------- 一键「全部更新」（分批循环） ---------- */
  var upBtn = $('#btn-update-all');
  if (upBtn) {
    upBtn.addEventListener('click', function () {
      if (!confirm('将批量刷新所有网站的名称与自动图标。\n用户自定义简称不受影响；标记为「自定义」的图标会被跳过。\n确定继续？')) return;
      var base = upBtn.getAttribute('data-url');
      var total = 0, updated = 0, failed = 0, skipped = 0, offset = 0;
      upBtn.disabled = true;
      function step() {
        fetch(base + '?offset=' + offset + '&limit=3', { credentials: 'same-origin' })
          .then(function (r) { return r.json(); })
          .then(function (d) {
            total = d.total; updated += d.updated; failed += d.failed; skipped += (d.skipped || 0); offset = d.offset;
            upBtn.textContent = '⟳ 更新中 ' + Math.min(offset, total) + '/' + total;
            if (!d.done) { step(); }
            else {
              upBtn.disabled = false;
              upBtn.textContent = '⟳ 全部更新（名称 + 自动图标）';
              alert('更新完成：\n成功 ' + updated + ' 个\n跳过（自定义图标）' + skipped + ' 个\n失败/无变化 ' + failed + ' 个\n共 ' + total + ' 个网站。');
              location.reload();
            }
          })
          .catch(function () { upBtn.disabled = false; upBtn.textContent = '⟳ 全部更新（名称 + 自动图标）'; alert('更新中断，请重试。'); });
      }
      step();
    });
  }
})();