const mongoose = require("mongoose");
const jsonHelper = require("../utils/jsonHelper");

function createSingletonPageModel(modelName, collectionName, dataFileName) {
  const schema = new mongoose.Schema(
    {},
    {
      strict: false,
      timestamps: true,
      collection: collectionName,
    },
  );

  schema.statics.getSingle = async function getSingle() {
    let doc = await this.findOne();

    if (!doc) {
      const defaultData = jsonHelper.readJsonFile(dataFileName) || {};
      doc = await this.create(defaultData);
    }

    return doc;
  };

  return mongoose.model(modelName, schema);
}

module.exports = createSingletonPageModel;