/**
 * AKSRT Remote Modal — zibll RefreshModal parity.
 *
 * Open a center/bottom modal with static HTML or remote fetch.
 * Contract:
 *   - data-toggle="AksrtRemoteModal" | data-aksrt-remote-modal
 *   - data-remote / href  → fetch HTML
 *   - data-class          → dialog class (modal-mini full-sm …)
 *   - data-height         → min-height hint
 *   - mobile-bottom="true" → bottom sheet on narrow viewports
 *
 * @package AKSRT
 */
(function (window, document) {
  "use strict";

  var ROOT_ID = "aksrt-remote-modal-root";
  var active = null;

  function isMobile() {
    return window.matchMedia && window.matchMedia("(max-width: 768px)").matches;
  }

  function ensureRoot() {
    var root = document.getElementById(ROOT_ID);
    if (root) return root;
    root = document.createElement("div");
    root.id = ROOT_ID;
    root.className = "aksrt-remote-modal-host";
    document.body.appendChild(root);
    return root;
  }

  function restHeaders() {
    var h = { Accept: "text/html, application/json" };
    if (window.aksrtData && aksrtData.restNonce) {
      h["X-WP-Nonce"] = aksrtData.restNonce;
    }
    return h;
  }

  function lockScroll(lock) {
    document.documentElement.classList.toggle("aksrt-remote-modal-open", !!lock);
    document.body.classList.toggle("aksrt-remote-modal-open", !!lock);
  }

  function close() {
    if (!active) return;
    active.classList.remove("is-open");
    lockScroll(false);
    var node = active;
    active = null;
    window.setTimeout(function () {
      if (node && node.parentNode) node.parentNode.removeChild(node);
    }, 220);
    document.dispatchEvent(new CustomEvent("aksrt:remote-modal:close"));
  }

  function bindChrome(shell) {
    shell.addEventListener("click", function (e) {
      if (e.target.closest("[data-aksrt-remote-modal-close], [data-dismiss='modal'], .aksrt-remote-modal__close")) {
        e.preventDefault();
        close();
        return;
      }
      if (e.target === shell || e.target.classList.contains("aksrt-remote-modal__overlay")) {
        close();
      }
    });
    shell.addEventListener("keydown", function (e) {
      if (e.key === "Escape") close();
    });
  }

  function open(options) {
    options = options || {};
    close();

    var root = ensureRoot();
    var shell = document.createElement("div");
    var bottom = options.bottom === true || (options.mobileBottom !== false && isMobile());
    shell.className =
      "aksrt-remote-modal" +
      (bottom ? " aksrt-remote-modal--bottom" : "") +
      (options.className ? " " + options.className : "");
    shell.setAttribute("role", "dialog");
    shell.setAttribute("aria-modal", "true");

    var heightStyle = options.height ? "min-height:" + parseInt(options.height, 10) + "px;" : "";
    shell.innerHTML =
      '<div class="aksrt-remote-modal__overlay" data-aksrt-remote-modal-close></div>' +
      '<div class="aksrt-remote-modal__dialog" style="' + heightStyle + '">' +
      '<div class="aksrt-remote-modal__content">' +
      (options.html || "") +
      "</div></div>";

    root.appendChild(shell);
    bindChrome(shell);
    active = shell;
    lockScroll(true);

    // Force reflow then open for CSS transition.
    void shell.offsetWidth;
    shell.classList.add("is-open");

    var focusable = shell.querySelector(
      "button, [href], input, select, textarea, [tabindex]:not([tabindex='-1'])"
    );
    if (focusable) {
      try {
        focusable.focus();
      } catch (err) {}
    }

    document.dispatchEvent(
      new CustomEvent("aksrt:remote-modal:open", { detail: { shell: shell, options: options } })
    );
    return shell;
  }

  function openRemote(options) {
    options = options || {};
    var url = options.url || "";
    if (!url) return Promise.reject(new Error("missing url"));

    var loading = open({
      html:
        '<div class="aksrt-remote-modal__loading"><i class="fas fa-spinner fa-spin"></i> ' +
        ((window.aksrtData && aksrtData.ajaxLoading) || "加载中…") +
        "</div>",
      className: options.className || "modal-mini full-sm",
      bottom: options.bottom,
      mobileBottom: options.mobileBottom,
      height: options.height,
    });

    return fetch(url, {
      method: options.method || "GET",
      credentials: "same-origin",
      headers: Object.assign(restHeaders(), options.headers || {}),
      body: options.body,
    })
      .then(function (res) {
        var type = (res.headers.get("content-type") || "").toLowerCase();
        if (type.indexOf("application/json") !== -1) {
          return res.json().then(function (json) {
            if (!res.ok || (json && json.success === false)) {
              var msg =
                (json && (json.message || (json.data && json.data.message))) ||
                "加载失败";
              throw new Error(msg);
            }
            var html =
              (json && (json.html || (json.data && (json.data.html || json.data)))) || "";
            if (typeof html !== "string") html = "";
            return html;
          });
        }
        return res.text().then(function (text) {
          if (!res.ok) throw new Error("加载失败");
          return text;
        });
      })
      .then(function (html) {
        if (loading && loading.parentNode) loading.parentNode.removeChild(loading);
        if (active === loading) active = null;
        return open({
          html: html,
          className: options.className || "modal-mini full-sm",
          bottom: options.bottom,
          mobileBottom: options.mobileBottom,
          height: options.height,
        });
      })
      .catch(function (err) {
        if (loading && loading.parentNode) loading.parentNode.removeChild(loading);
        if (active === loading) active = null;
        open({
          html:
            '<div class="aksrt-remote-modal__error touch border-title"><b>提示</b></div>' +
            '<div class="aksrt-remote-modal__error-body">' +
            (err && err.message ? String(err.message) : "加载失败") +
            '</div><div class="but-average modal-buts"><button type="button" class="but" data-aksrt-remote-modal-close>关闭</button></div>',
          className: "modal-mini",
          mobileBottom: true,
        });
        throw err;
      });
  }

  function fromTrigger(el) {
    if (!el) return null;
    var url =
      el.getAttribute("data-remote") ||
      el.getAttribute("data-aksrt-remote") ||
      el.getAttribute("href") ||
      "";
    if (!url || url === "#") return null;
    var height = el.getAttribute("data-height") || el.getAttribute("data-aksrt-height");
    return openRemote({
      url: url,
      className: el.getAttribute("data-class") || el.getAttribute("data-aksrt-class") || "modal-mini full-sm",
      height: height ? parseInt(height, 10) : 0,
      mobileBottom: el.getAttribute("mobile-bottom") !== "false",
      bottom: el.getAttribute("data-bottom") === "true",
    });
  }

  document.addEventListener("click", function (e) {
    var trigger = e.target.closest(
      '[data-toggle="AksrtRemoteModal"], [data-toggle="RefreshModal"], [data-aksrt-remote-modal], a.aksrt-remote-modal-link'
    );
    if (!trigger) return;
    if (trigger.getAttribute("data-aksrt-remote-modal") === "off") return;
    e.preventDefault();
    fromTrigger(trigger);
  });

  document.addEventListener("keydown", function (e) {
    if (e.key === "Escape" && active) close();
  });

  window.AksrtRemoteModal = {
    open: open,
    openRemote: openRemote,
    close: close,
    fromTrigger: fromTrigger,
    getActive: function () {
      return active;
    },
  };
})(window, document);