/* global window, document */

(function () {
  'use strict';

  function getSectok() {
    try {
      if (window.JSINFO && window.JSINFO.sectok) return String(window.JSINFO.sectok);
    } catch (e) {}

    try {
      var inp = document.querySelector('input[name="sectok"], input[name="securitytoken"]');
      if (inp && inp.value) return String(inp.value);
    } catch (e2) {}

    return '';
  }

  function getPageId() {
    try {
      if (window.JSINFO && window.JSINFO.id) return String(window.JSINFO.id);
    } catch (e) {}

    try {
      var input = document.querySelector('input[name="id"]');
      if (input && input.value) return String(input.value);
    } catch (e2) {}

    return '';
  }

  function getBaseUrl() {
    try {
      if (window.DOKU_BASE) return String(window.DOKU_BASE);
    } catch (e) {}

    try {
      if (window.JSINFO && window.JSINFO.base) return String(window.JSINFO.base);
    } catch (e2) {}

    return '/';
  }

  function requestPageLink(cmd, params) {
    var pageId = getPageId();
    if (!pageId) return false;

    var endpoint = getBaseUrl() + 'lib/plugins/luxtools/pagelink.php';

    var payload = new window.URLSearchParams();
    payload.set('cmd', cmd);
    payload.set('id', pageId);
    if (params && typeof params === 'object') {
      Object.keys(params).forEach(function (key) {
        payload.set(key, String(params[key]));
      });
    }

    window.fetch(endpoint, {
      method: 'POST',
      credentials: 'same-origin',
      headers: { 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8' },
      body: payload.toString()
    }).then(function (res) {
      return res.json().catch(function () { return null; }).then(function (body) {
        if (!res.ok || !body || body.ok !== true) {
          throw new Error('request failed');
        }
        return body;
      });
    }).catch(function (err) {
      if (window.console && window.console.warn) {
        window.console.warn('PageLink request failed:', err);
      }
    });

    return false;
  }

  function ensurePageLink() {
    return requestPageLink('ensure', { sectok: getSectok() });
  }

  function unlinkPageLink() {
    return requestPageLink('unlink', { sectok: getSectok() });
  }

  function copyToClipboard(text) {
    if (!text) return;
    if (window.navigator && window.navigator.clipboard && window.navigator.clipboard.writeText) {
      window.navigator.clipboard.writeText(text).catch(function () {});
      return;
    }

    try {
      var textarea = document.createElement('textarea');
      textarea.value = text;
      textarea.setAttribute('readonly', 'readonly');
      textarea.style.position = 'absolute';
      textarea.style.left = '-9999px';
      document.body.appendChild(textarea);
      textarea.select();
      try {
        document.execCommand('copy');
      } catch (e) {}
      document.body.removeChild(textarea);
    } catch (e2) {}
  }

  function attachCopyTargets() {
    var targets = document.querySelectorAll('[data-luxtools-pagelink-copy="1"]');
    if (!targets || !targets.length) return;

    targets.forEach(function (el) {
      if (!el || !el.getAttribute) return;
      el.setAttribute('role', 'button');
      el.setAttribute('tabindex', '0');
      el.addEventListener('click', function (e) {
        e.preventDefault();
        copyToClipboard(String(el.getAttribute('data-uuid') || '').trim());
      });
      el.addEventListener('keydown', function (e) {
        if (!e || (e.key !== 'Enter' && e.key !== ' ')) return;
        e.preventDefault();
        copyToClipboard(String(el.getAttribute('data-uuid') || '').trim());
      });
    });
  }

  function attachDocInfoLink() {
    var container = document.querySelector('.docInfo');
    if (!container || !container.getAttribute) return;
    if (container.getAttribute('data-luxtools-pagelink-docinfo') === '1') return;
    container.setAttribute('data-luxtools-pagelink-docinfo', '1');

    var pageId = getPageId();
    if (!pageId) return;

    var endpoint = getBaseUrl() + 'lib/plugins/luxtools/pagelink.php';
    var query = endpoint + '?cmd=info&id=' + encodeURIComponent(pageId);

    window.fetch(query, {
      method: 'GET',
      credentials: 'same-origin'
    }).then(function (res) {
      return res.json().catch(function () { return null; }).then(function (body) {
        if (!res.ok || !body || body.ok !== true) {
          throw new Error('request failed');
        }
        return body;
      });
    }).then(function (info) {
      if (!info || !info.uuid) return;

      var link = document.createElement('a');
      link.href = endpoint + '?cmd=download&id=' + encodeURIComponent(pageId);
      link.textContent = 'Page ID: ' + String(info.uuid);

      var first = container.firstChild;
      container.insertBefore(link, first);
      if (first) {
        container.insertBefore(document.createTextNode(' · '), first);
      }
    }).catch(function () {
      // ignore failures
    });
  }

  window.addBtnActionLuxtoolsPageLink = function ($btn, props, edid) {
    $btn.on('click', function () {
      var pageId = getPageId();
      if (!pageId) return false;

      var endpoint = getBaseUrl() + 'lib/plugins/luxtools/pagelink.php';
      var query = endpoint + '?cmd=info&id=' + encodeURIComponent(pageId);

      window.fetch(query, {
        method: 'GET',
        credentials: 'same-origin'
      }).then(function (res) {
        return res.json().catch(function () { return null; }).then(function (body) {
          if (!res.ok || !body || body.ok !== true) {
            throw new Error('request failed');
          }
          return body;
        });
      }).then(function (info) {
        if (info && info.uuid) {
          if (window.confirm('Unlink page?')) {
            unlinkPageLink();
          }
          return;
        }

        ensurePageLink();
      }).catch(function (err) {
        if (window.console && window.console.warn) {
          window.console.warn('PageLink info failed:', err);
        }
        ensurePageLink();
      });
      return false;
    });
    return 'luxtools-pagelink';
  };

  document.addEventListener('DOMContentLoaded', function () {
    attachCopyTargets();
    attachDocInfoLink();
  }, false);
})();