const { addBaseUrlToImages } = require("../utils/imageHelper");
const Home = require("../models/home");
const writeAuditLog = require("../audit/writeAuditLog");
const diffObject = require("../audit/diffObject");
const AUDIT_ACTIONS = require("../constants/auditAction");

// Get videoGallery data from Home model
const getVideoGalleryData = async () => {
  const home = await Home.findOne().sort({ updatedAt: -1 });
  if (!home || !home.videoGallery) {
    return null;
  }
  return home.videoGallery.toObject
    ? home.videoGallery.toObject()
    : home.videoGallery;
};

// API to get videoGallery data
exports.api = async (req, res) => {
  try {
    const videoGallery = await getVideoGalleryData();
    if (!videoGallery) {
      return res.status(404).json({ error: "Video Gallery data not found" });
    }
    const baseUrl =
      process.env.BACKEND_URL ?? `${req.protocol}://${req.get("host")}`;
    const processedData = addBaseUrlToImages(videoGallery, baseUrl);
    res.json(processedData);
  } catch (err) {
    console.error("API Error:", err);
    res.status(500).json({ error: "Error loading video gallery data" });
  }
};

// Render admin view
exports.index = async (req, res) => {
  try {
    const data = (await getVideoGalleryData()) || {
      heading: "",
      videoUrl: "",
      thumbnail: "",
    };

    const frontendUrl = process.env.FRONTEND_URL;

    res.render("admin/home/videoGallery/index", {
      title: "Video Gallery Management",
      layout: "layouts/main",
      data,
      frontendUrl,
      currentPath: req.path,
      user: req.session.user,
    });
  } catch (error) {
    console.error("Error in videoGallery index:", error);
    req.flash("error_msg", "An error occurred while loading the page");
    res.redirect("/admin/dashboard");
  }
};

// Cập nhật dữ liệu videoGallery
exports.update = async (req, res) => {
  try {
    const { heading, videoUrl, thumbnail } = req.body;

    // Tìm hoặc tạo Home document
    let home = await Home.findOne().sort({ updatedAt: -1 });

    if (!home) {
      home = new Home({});
    }

    // ✅ Capture BEFORE state
    const beforeData = home.videoGallery
      ? JSON.parse(
          JSON.stringify(
            home.videoGallery.toObject
              ? home.videoGallery.toObject()
              : home.videoGallery,
          ),
        )
      : {};

    const updatedVideoGalleryData = {
      heading: heading || "",
      videoUrl: videoUrl || "",
      thumbnail: thumbnail || "",
    };

    // Cập nhật chỉ phần videoGallery
    home.videoGallery = updatedVideoGalleryData;

    await home.save();

    // ✅ Capture AFTER state
    const afterData = JSON.parse(JSON.stringify(updatedVideoGalleryData));

    // ✅ AUDIT LOGGING - Video Gallery Updated
    const changes = diffObject(beforeData, afterData);
    if (changes.length > 0) {
      await writeAuditLog({
        model: "Home",
        documentId: home._id,
        action: AUDIT_ACTIONS.UPDATE_VIDEO_GALLERY,
        before: beforeData,
        after: afterData,
        changes,
        req,
      });
    }

    req.flash("success_msg", "Video Gallery updated successfully");
    res.redirect("/admin/home/video-gallery");
  } catch (err) {
    console.error("Error updating video gallery:", err);
    req.flash("error_msg", err.message || "Error updating video gallery");
    res.redirect("/admin/home/video-gallery");
  }
};