/**
 * my-editor.js — VvvebJS 儲存與新增頁面橋接腳本
 * 覆蓋 Vvveb.Builder.saveAjax 行為，使儲存與新增頁面功能無縫串接至 Flask 後端
 */
(function () {
  "use strict";

  const SLUG = window.VVVEB_PROJECT_SLUG || "";

  // ── Toast 通知 ──────────────────────────────────────────────────
  function showToast(msg, type) {
    const existing = document.getElementById("vvveb-save-toast");
    if (existing) existing.remove();

    const toast = document.createElement("div");
    toast.id = "vvveb-save-toast";
    const bg = type === "error" ? "#7f1d1d" : "#14532d";
    const border = type === "error" ? "#ef444460" : "#22c55e60";
    Object.assign(toast.style, {
      position: "fixed",
      top: "1rem",
      right: "1rem",
      zIndex: "99999",
      background: bg,
      border: "1px solid " + border,
      color: "#fff",
      borderRadius: "8px",
      padding: "0.65rem 1.1rem",
      fontSize: "0.85rem",
      fontFamily: "Inter, system-ui, sans-serif",
      fontWeight: "500",
      boxShadow: "0 4px 20px rgba(0,0,0,0.5)",
      opacity: "0",
      transform: "translateY(-8px)",
      transition: "opacity 0.3s ease, transform 0.3s ease",
      pointerEvents: "none",
    });
    toast.textContent = msg;
    document.body.appendChild(toast);

    requestAnimationFrame(() => {
      toast.style.opacity = "1";
      toast.style.transform = "translateY(0)";
    });
    setTimeout(() => {
      toast.style.opacity = "0";
      toast.style.transform = "translateY(-8px)";
      setTimeout(() => toast.remove(), 350);
    }, 3000);
  }

  // ── 覆蓋 Vvveb.Builder.saveAjax ──────────────────────────────────
  function patchSaveAjax() {
    if (typeof Vvveb === "undefined" || !Vvveb.Builder) {
      // 等待 Vvveb 載入
      setTimeout(patchSaveAjax, 200);
      return;
    }

    /**
     * VvvebJS 原始簽名: saveAjax(data, saveUrl, callback, error)
     */
    Vvveb.Builder.saveAjax = function (data, saveUrl, callback, error) {
      if (!SLUG) {
        showToast("錯誤：找不到專案識別碼 (slug)", "error");
        if (error) error(new Error("Missing slug"));
        return;
      }

      // 確保 data 為物件並填入專案識別碼
      if (typeof data !== "object" || data === null) {
        data = {};
      }
      data.slug = SLUG;

      // 扁平化處理新檔案檔名（確保所有頁面皆存於專案根目錄下）
      if (data.file) {
        const parts = data.file.split("/");
        data.file = parts[parts.length - 1];
      }

      // 如果不是新增頁面（即一般的儲存頁面），且未帶有 HTML 內容，則動態獲取目前 HTML
      const isNewPage = !!data.startTemplateUrl;
      if (!isNewPage && !data.html) {
        try {
          data.html = Vvveb.Builder.getHtml ? Vvveb.Builder.getHtml() : "";
        } catch (e) {
          console.error("[my-editor] getHtml failed:", e);
        }
      }

      // 顯示儲存中狀態（一般儲存時觸發）
      const saveBtn = document.querySelector(".save-btn");
      if (saveBtn && !isNewPage) {
        saveBtn.querySelector(".loading")?.classList.remove("d-none");
        saveBtn.querySelector(".button-text")?.classList.add("d-none");
      }

      // 發送 POST 請求至 Flask API
      fetch("/api/save", {
        method: "POST",
        headers: { "Content-Type": "application/x-www-form-urlencoded" },
        body: new URLSearchParams(data).toString(),
      })
        .then((res) => {
          if (!res.ok) {
            return res.json().then((errData) => {
              throw new Error(errData.error || "伺服器儲存錯誤");
            });
          }
          return res.json();
        })
        .then((resData) => {
          if (isNewPage) {
            // 新增頁面成功：秀出通知並執行 Vvveb 原生 callback 以載入新頁面
            showToast("✓ 成功建立新頁面：" + resData.file);
            if (callback) {
              callback({
                name: resData.name,
                title: resData.title,
                file: resData.file,
                url: resData.url
              });
            }
          } else {
            // 一般儲存成功
            showToast("✓ 已儲存：" + (resData.saved || data.file));
            if (callback) callback(resData);
            // 停用儲存按鈕（直至下一次變更）
            document.querySelectorAll("#top-panel .save-btn").forEach((e) =>
              e.setAttribute("disabled", "true")
            );
          }
        })
        .catch((err) => {
          showToast("儲存失敗：" + err.message, "error");
          if (error) error(err);
        })
        .finally(() => {
          if (saveBtn && !isNewPage) {
            saveBtn.querySelector(".loading")?.classList.add("d-none");
            saveBtn.querySelector(".button-text")?.classList.remove("d-none");
          }
        });
    };

    console.log("[my-editor] Robust Vvveb.Builder.saveAjax patched for slug:", SLUG);
  }

  // ── 啟用 Save 按鈕（vvvebjs 預設 disabled）──────────────────────
  function enableSaveBtn() {
    const btn = document.querySelector(".save-btn");
    if (btn) {
      btn.removeAttribute("disabled");
    } else {
      setTimeout(enableSaveBtn, 300);
    }
  }

  // ── Ctrl+S 快捷鍵 ────────────────────────────────────────────────
  document.addEventListener("keydown", function (e) {
    if ((e.ctrlKey || e.metaKey) && e.key === "s") {
      e.preventDefault();
      if (typeof Vvveb !== "undefined" && Vvveb.Builder && Vvveb.Builder.saveAjax) {
        // 觸發原生儲存按鈕的 click
        const btn = document.querySelector(".save-btn");
        if (btn) {
          btn.click();
        } else {
          Vvveb.Builder.saveAjax({});
        }
      }
    }
  });

  // ── 初始化 ────────────────────────────────────────────────────────
  if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", () => {
      patchSaveAjax();
      enableSaveBtn();
    });
  } else {
    patchSaveAjax();
    enableSaveBtn();
  }
})();