const mongoose = require("mongoose");

const courseSchema = new mongoose.Schema(
  {
    id: { type: String, default: "" },
    title: { type: String, default: "" },
    description: { type: String, default: "" },
    icon: { type: String, default: "" },
  },
  { _id: false }
);

const outcomeSchema = new mongoose.Schema(
  {
    title: { type: String, default: "" },
    description: { type: String, default: "" },
    icon: { type: String, default: "" },
  },
  { _id: false }
);

const faqSchema = new mongoose.Schema(
  {
    question: { type: String, default: "" },
    answer: { type: String, default: "" },
  },
  { _id: false }
);

const programmeSchema = new mongoose.Schema(
  {
    id: { type: String, required: true, unique: true, trim: true },
    level: { type: String, default: "" },
    title: { type: String, default: "" },
    description: { type: String, default: "" },
    duration: { type: String, default: "" },
    cost: { type: String, default: "" },
    selected: { type: Boolean, default: false },
    link: { type: String, default: "" },
    shortName: { type: String, default: "" },
    detailBadge: { type: String, default: "" },
    detailTitle: { type: String, default: "" },
    detailDescription: { type: String, default: "" },
    heroImage: { type: String, default: "" },
    overview: { type: String, default: "" },
    credits: { type: Number, default: 0 },
    format: { type: String, default: "100% Online" },
    nextStartDate: { type: String, default: "" },
    monthlyCost: { type: String, default: "" },
    perCourseCost: { type: String, default: "" },
    coreCourses: { type: [courseSchema], default: [] },
    electives: { type: [String], default: [] },
    outcomes: { type: [outcomeSchema], default: [] },
    faqs: { type: [faqSchema], default: [] },
  },
  { timestamps: true }
);

/**
 * Upsert from a JSON array. Used by migration scripts.
 */
programmeSchema.statics.migrateFromJson = async function (jsonArray) {
  const results = [];
  for (const item of jsonArray) {
    const existing = await this.findOne({ id: item.id });
    if (existing) {
      existing.set(item);
      await existing.save();
      results.push({ action: "updated", id: item.id });
    } else {
      await this.create(item);
      results.push({ action: "created", id: item.id });
    }
  }
  return results;
};

module.exports = mongoose.model("Programme", programmeSchema);