uldp-degree-mangement-system/controllers/headerController.js

const Header = require("../models/header");
const HeaderMenu = require("../models/HeaderMenu");
const writeAuditLog = require("../audit/writeAuditLog");
const diffObject = require("../audit/diffObject");
const AUDIT_ACTIONS = require("../constants/auditAction");

/**
 * Helper function to build a tree structure (Mirroring logic in headerMenuController)
 */
const buildTree = (items, parentId = null) => {
  const branch = [];
  const children = items.filter(
    (item) =>
      String(item.parentId) === String(parentId) ||
      (item.parentId === null && parentId === null),
  );

  for (const child of children) {
    const item = child.toObject ? child.toObject() : { ...child };
    const subChildren = buildTree(items, item._id);
    item.children = subChildren.length > 0 ? subChildren : [];
    branch.push(item);
  }

  return branch.sort((a, b) => a.order - b.order);
};

// Admin: Render header management page
exports.index = async (req, res) => {
  try {
    const header = await Header.findOne().sort({ order: 1 });

    // Prepare data for view
    const data = header
      ? {
          topbar: {
            contactInfo: {
              phone: header.top?.phone || "",
              email: header.top?.email || "",
              location: header.top?.location || "",
            },
            socialLinks: header.top?.socialLinks || [],
          },
          logo: header.logo?.light || "",
        }
      : {
          topbar: {
            contactInfo: {
              phone: "",
              email: "",
              location: "",
            },
            socialLinks: [],
          },
          logo: "",
        };

    const activeTab = req.query.tab || "topbar";

    // Always fetch menu items to ensure they are available even if the user
    // switches tabs client-side
    const items = await HeaderMenu.find().sort({ order: 1 });
    const menuData = {
      flat: items,
      tree: buildTree(items),
    };

    res.render("admin/header/index", {
      layout: "layouts/main",
      title: "Header Management",
      user: req.session.user || null,
      data: data,
      activeTab: activeTab,
      menuData: menuData,
    });
  } catch (error) {
    console.error("Error loading header management:", error);
    res.status(500).render("page/error", {
      title: "Error",
      message: "Failed to load header management page",
    });
  }
};

// Admin: Get all headers (API)
exports.getAll = async (req, res) => {
  try {
    const headers = await Header.find().sort({ order: 1 });
    res.json({
      success: true,
      data: headers,
    });
  } catch (error) {
    res.status(500).json({
      success: false,
      message: error.message,
    });
  }
};

// Admin: Get single header
exports.show = async (req, res) => {
  try {
    const header = await Header.findById(req.params.id);
    if (!header) {
      return res.status(404).json({
        success: false,
        message: "Header not found",
      });
    }
    res.json({
      success: true,
      data: header,
    });
  } catch (error) {
    res.status(500).json({
      success: false,
      message: error.message,
    });
  }
};

// Admin: Create header
exports.store = async (req, res) => {
  try {
    const { top, offcanvas, menu, logo, ctaButton, status, order } = req.body;

    const header = new Header({
      top,
      offcanvas,
      menu,
      logo,
      ctaButton,
      status: status || "active",
      order: order || 1,
    });

    await header.save();
    res.status(201).json({
      success: true,
      message: "Header created successfully",
      data: header,
    });
  } catch (error) {
    res.status(400).json({
      success: false,
      message: error.message,
    });
  }
};

// Admin: Update header
exports.update = async (req, res) => {
  try {
    let { top, topbarJson, offcanvas, menu, logo, ctaButton, status, order } =
      req.body;

    console.log("=== UPDATE REQUEST RECEIVED ===");
    console.log("Raw body:", JSON.stringify(req.body, null, 2));
    console.log("topbarJson type:", typeof topbarJson);
    console.log("topbarJson value:", topbarJson);

    // Nếu có topbarJson, parse nó
    if (topbarJson && typeof topbarJson === "string") {
      try {
        const parsedData = JSON.parse(topbarJson);
        console.log("✓ Parsed topbarJson successfully:", parsedData);
        // Chuyển đổi từ topbarData sang top format
        top = {
          phone: parsedData.contactInfo?.phone || "",
          email: parsedData.contactInfo?.email || "",
          location: parsedData.contactInfo?.location || "",
          socialLinks: parsedData.socialLinks || [],
        };
        console.log("✓ Converted to top object:", top);
      } catch (e) {
        console.error("✗ Error parsing topbarJson:", e.message);
        return res.status(400).json({
          success: false,
          message: "Invalid JSON in topbarJson: " + e.message,
        });
      }
    }

    // Nếu không có id, tìm header đầu tiên hoặc tạo mới
    let headerId = req.params.id;

    if (!headerId) {
      // Tìm header đầu tiên
      let header = await Header.findOne().sort({ order: 1 });
      if (!header) {
        console.log("No existing header found, creating new one");
        // Tạo header mới nếu chưa có
        header = new Header({
          top,
          offcanvas,
          menu,
          logo: logo ? { light: logo } : {},
          ctaButton,
          status: status || "active",
          order: order || 1,
        });
        await header.save();
        console.log("✓ Header created:", header._id);
        return res.json({
          success: true,
          message: "Header created successfully",
          data: header,
        });
      }
      headerId = header._id;
      console.log("✓ Found existing header:", headerId);
    }

    // Chuẩn bị dữ liệu logo - merge với dữ liệu cũ
    let logoData = {};
    if (logo) {
      // Nếu có logo mới, lấy dữ liệu cũ và update light
      const existingHeader = await Header.findById(headerId);
      logoData = {
        light: logo,
        dark: existingHeader?.logo?.dark || "",
        alt: existingHeader?.logo?.alt || "",
      };
    }

    const updateData = {
      top,
      offcanvas,
      menu,
      ctaButton,
      status,
      order,
    };

    if (logo) {
      updateData.logo = logoData;
    }

    console.log(
      "Preparing to update header with data:",
      JSON.stringify(updateData, null, 2),
    );

    // ✅ Capture BEFORE state
    const beforeHeader = await Header.findById(headerId);
    const beforeData = beforeHeader
      ? JSON.parse(JSON.stringify(beforeHeader.toObject()))
      : {};

    const updatedHeader = await Header.findByIdAndUpdate(headerId, updateData, {
      new: true,
      runValidators: true,
    });

    if (!updatedHeader) {
      console.error("✗ Header not found with ID:", headerId);
      return res.status(404).json({
        success: false,
        message: "Header not found",
      });
    }

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

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

    console.log("✓ Header updated successfully:", updatedHeader._id);
    console.log("Updated header data:", JSON.stringify(updatedHeader, null, 2));

    res.json({
      success: true,
      message: "Header updated successfully",
      data: updatedHeader,
    });
  } catch (error) {
    console.error("✗ Error updating header:", error);
    res.status(400).json({
      success: false,
      message: error.message,
    });
  }
};

// Admin: Update status
exports.updateStatus = async (req, res) => {
  try {
    const { status } = req.body;

    if (!["active", "inactive"].includes(status)) {
      return res.status(400).json({
        success: false,
        message: "Invalid status",
      });
    }

    const header = await Header.findByIdAndUpdate(
      req.params.id,
      { status },
      { new: true },
    );

    if (!header) {
      return res.status(404).json({
        success: false,
        message: "Header not found",
      });
    }

    res.json({
      success: true,
      message: "Header status updated",
      data: header,
    });
  } catch (error) {
    res.status(500).json({
      success: false,
      message: error.message,
    });
  }
};

// Admin: Delete header
exports.destroy = async (req, res) => {
  try {
    const header = await Header.findByIdAndDelete(req.params.id);

    if (!header) {
      return res.status(404).json({
        success: false,
        message: "Header not found",
      });
    }

    res.json({
      success: true,
      message: "Header deleted successfully",
    });
  } catch (error) {
    res.status(500).json({
      success: false,
      message: error.message,
    });
  }
};

// Public API: Get active header
exports.api = async (req, res) => {
  try {
    const header = await Header.findOne({ status: "active" }).sort({
      order: 1,
    });

    if (!header) {
      return res.status(404).json({
        success: false,
        message: "No active header found",
      });
    }

    res.json({
      success: true,
      data: header,
    });
  } catch (error) {
    res.status(500).json({
      success: false,
      message: error.message,
    });
  }
};

// Public API: Get menu tree structure
exports.getMenuTreeAPI = async (req, res) => {
  try {
    const header = await Header.findOne({ status: "active" }).sort({
      order: 1,
    });

    if (!header || !header.menu) {
      return res.status(404).json({
        success: false,
        message: "No active menu found",
      });
    }

    res.json({
      success: true,
      data: header.menu,
    });
  } catch (error) {
    res.status(500).json({
      success: false,
      message: error.message,
    });
  }
};