/**
 * AKSRT Article Tools — password toggles, search clear, article actions, interaction bar
 */
(function () {
  "use strict";

  function initPasswordToggles(root) {
    (root || document).querySelectorAll(".toggle-pwd").forEach(function (btn) {
      if (btn.dataset.pwdToggleBound) return;
      btn.dataset.pwdToggleBound = "1";
      btn.addEventListener("click", function () {
        var id = btn.getAttribute("data-target");
        var input = id ? document.getElementById(id) : null;
        if (!input) return;
        var show = input.getAttribute("type") === "password";
        input.setAttribute("type", show ? "text" : "password");
        btn.setAttribute("aria-label", show ? "隐藏密码" : "显示密码");
      });
    });
  }

  function initSearchClear() {
    var btn = document.getElementById("search-clear-btn");
    var input = document.getElementById("search-page-input");

    if (btn && input) {
      var syncClearButton = function () {
        var hasValue = input.value.trim().length > 0;
        btn.classList.toggle("is-visible", hasValue);
        btn.hidden = !hasValue;
      };

      btn.addEventListener("click", function () {
        input.value = "";
        input.focus();
        syncClearButton();
      });

      input.addEventListener("input", syncClearButton);
      syncClearButton();
    }

    var categorySelect = document.getElementById("search-category-filter");
    if (categorySelect) {
      categorySelect.addEventListener("change", function () {
        var url = new URL(window.location.href);
        if (this.value) {
          url.searchParams.set("aksrt_category", this.value);
        } else {
          url.searchParams.delete("aksrt_category");
        }
        if (url.searchParams.get("aksrt_search_type") && url.searchParams.get("aksrt_search_type") !== "post") {
          url.searchParams.delete("aksrt_category");
        }
        url.searchParams.delete("paged");
        window.location.href = url.toString();
      });
    }
  }

  function showToast(msg, type) {
    if (window.aksrt && aksrt.notyf) {
      aksrt.notyf(msg, { type: type || "info", duration: 2200 });
    } else {
      console.log("[AKSRT Toast]", type, msg);
    }
  }

  function initArticleTools() {
    var buttons = document.querySelectorAll("[data-article-tool]");
    if (!buttons.length) return;

    buttons.forEach(function (button) {
      button.addEventListener("click", function () {
        var tool = button.getAttribute("data-article-tool");
        if (tool === "print") {
          window.print();
          return;
        }

        if (tool === "pdf") {
          window.print();
          if (typeof showToast === "function") {
            showToast("请在打印对话框中选择“另存为 PDF”", "info");
          }
        }
      });
    });
  }

  function getBaseStatCount(statName) {
    var statEl = document.querySelector('[data-stat-count="' + statName + '"][data-base-count]');
    return statEl ? (parseInt(statEl.dataset.baseCount, 10) || 0) : 0;
  }

  function updateStatCounts(statName, count) {
    var safeCount = Math.max(0, count);
    document.querySelectorAll('[data-stat-count="' + statName + '"]').forEach(function (statEl) {
      statEl.textContent = String(safeCount);
    });
  }

  function setBaseStatCount(statName, count) {
    var safeCount = Math.max(0, count);
    document.querySelectorAll('[data-stat-count="' + statName + '"][data-base-count]').forEach(function (statEl) {
      statEl.dataset.baseCount = String(safeCount);
    });
    updateStatCounts(statName, safeCount);
  }

  function requestInteraction(actionName, postId, active) {
    if (!window.aksrtData || !aksrtData.ajaxUrl || !aksrtData.nonce) {
      return Promise.reject(new Error("互动服务未配置"));
    }

    var body = new URLSearchParams();
    body.set("action", actionName);
    body.set("nonce", aksrtData.nonce);
    body.set("postId", String(postId));
    body.set("active", active ? "1" : "0");

    return fetch(aksrtData.ajaxUrl, {
      method: "POST",
      headers: { "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8" },
      credentials: "same-origin",
      body: body.toString()
    }).then(function (response) {
      return response.json().catch(function () {
        throw new Error("服务器返回无效响应");
      });
    }).then(function (payload) {
      if (!payload || !payload.success) {
        var message = payload && payload.data && payload.data.message ? payload.data.message : "请求失败";
        throw new Error(message);
      }
      return payload.data || {};
    });
  }

  function setButtonBusy(button, busy) {
    button.disabled = !!busy;
    button.classList.toggle("is-loading", !!busy);
  }

  function findInScope(scope, id) {
    scope = scope || document;
    if (!scope) return null;
    if (scope.nodeType === 9) {
      return scope.getElementById(id);
    }
    if (scope.nodeType === 1) {
      if (scope.id === id) return scope;
      return typeof scope.querySelector === "function"
        ? scope.querySelector("#" + id)
        : null;
    }
    return null;
  }

  function initInteractionBar(root) {
    var scope = root || document;
    // Element roots (AJAX rehydrate) do not implement getElementById
    var likeBtn = findInScope(scope, "action-like");
    var favBtn = findInScope(scope, "action-favorite");

    if (likeBtn && likeBtn.dataset.aksrtInteractionBound) return;
    if (favBtn && favBtn.dataset.aksrtInteractionBound) return;

    if (likeBtn) {
      var likePostId = likeBtn.dataset.postId ? String(likeBtn.dataset.postId) : "";

      function applyLikeState(isActive, count) {
        likeBtn.dataset.initialActive = isActive ? "1" : "0";
        likeBtn.classList.toggle("is-active", isActive);
        var likeIcon = likeBtn.querySelector("i");
        if (likeIcon) {
          likeIcon.className = isActive ? "fas fa-heart" : "far fa-heart";
        }
        if ("number" === typeof count && !isNaN(count)) {
          setBaseStatCount("likes", count);
        } else {
          updateStatCounts("likes", getBaseStatCount("likes"));
        }
      }

      applyLikeState(likeBtn.dataset.initialActive === "1", getBaseStatCount("likes"));

      likeBtn.addEventListener("click", function () {
        if (!likePostId || likeBtn.disabled) return;
        var nextState = likeBtn.dataset.initialActive !== "1";
        setButtonBusy(likeBtn, true);
        requestInteraction("aksrt_toggle_like", likePostId, nextState).then(function (data) {
          applyLikeState(!!data.active, parseInt(data.count, 10) || 0);
          showToast(data.active ? "感谢你的点赞" : "已取消点赞", "success");
        }).catch(function (error) {
          showToast(error && error.message ? error.message : "点赞失败", "error");
        }).finally(function () {
          setButtonBusy(likeBtn, false);
        });
      });
    }

    if (favBtn) {
      var favoritePostId = favBtn.dataset.postId ? String(favBtn.dataset.postId) : "";

      function applyFavoriteState(isActive, count) {
        favBtn.dataset.initialActive = isActive ? "1" : "0";
        favBtn.classList.toggle("is-active", isActive);
        var favoriteIcon = favBtn.querySelector("i");
        if (favoriteIcon) {
          favoriteIcon.className = isActive ? "fas fa-star" : "far fa-star";
        }
        if ("number" === typeof count && !isNaN(count)) {
          setBaseStatCount("favorites", count);
        } else {
          updateStatCounts("favorites", getBaseStatCount("favorites"));
        }
      }

      applyFavoriteState(favBtn.dataset.initialActive === "1", getBaseStatCount("favorites"));

      favBtn.addEventListener("click", function () {
        if (!favoritePostId || favBtn.disabled) return;
        var nextState = favBtn.dataset.initialActive !== "1";
        setButtonBusy(favBtn, true);
        requestInteraction("aksrt_toggle_favorite", favoritePostId, nextState).then(function (data) {
          applyFavoriteState(!!data.active, parseInt(data.count, 10) || 0);
          showToast(data.active ? "收藏成功" : "已取消收藏", "success");
        }).catch(function (error) {
          showToast(error && error.message ? error.message : "收藏失败", "error");
        }).finally(function () {
          setButtonBusy(favBtn, false);
        });
      });
    }

    if (likeBtn) likeBtn.dataset.aksrtInteractionBound = "1";
    if (favBtn) favBtn.dataset.aksrtInteractionBound = "1";
  }

  window.AksrtFrontend.register("aksrt-search-clear", function () { initSearchClear(); });
  window.AksrtFrontend.register("aksrt-article-tools", function () { initArticleTools(); });
  window.AksrtFrontend.register("aksrt-password-toggles", function (root) { initPasswordToggles(root); });
  window.AksrtFrontend.register("aksrt-interaction-bar", function (root) { initInteractionBar(root); });
})();