const AccreditationPage = require("../models/accreditationPage");
const AUDIT_ACTIONS = require("../constants/auditAction");
const accreditationConfig = require("../utils/contentEditors/accreditationConfig");
const createPageContentController = require("./_createPageContentController");
const createRenderSingletonPageView = require("./_renderSingletonPageView");

const controller = createPageContentController({
  model: AccreditationPage,
  modelName: "AccreditationPage",
  auditAction: AUDIT_ACTIONS.UPDATE_ACCREDITATION,
  editorConfig: accreditationConfig,
  preparePayload(rawPayload) {
    const payload = JSON.parse(JSON.stringify(rawPayload || {}));
    const tabs = Array.isArray(payload?.grid?.tabs) ? payload.grid.tabs : [];
    const seenTabs = new Set();
    const duplicateTabs = [];

    tabs.forEach((tab) => {
      const normalizedTab = String(tab || "").trim().toLowerCase();
      if (!normalizedTab) {
        return;
      }

      if (seenTabs.has(normalizedTab)) {
        duplicateTabs.push(String(tab || "").trim());
        return;
      }

      seenTabs.add(normalizedTab);
    });

    if (duplicateTabs.length > 0) {
      throw new Error(
        `Category tab already exists: ${duplicateTabs[0]}. Please use unique tab names.`,
      );
    }

    return payload;
  },
});

controller.index = async function index(req, res) {
  try {
    return await createRenderSingletonPageView({
      model: AccreditationPage,
      editorConfig: accreditationConfig,
      view: "admin/accreditation/index",
    })(req, res);
  } catch (error) {
    console.error("accreditation index error:", error);
    req.flash("error_msg", "Error loading Accreditation Management");
    return req.session.save(() => res.redirect("/admin/dashboard"));
  }
};

module.exports = controller;