const mongoose = require("mongoose");

// ── Sub-schemas ──────────────────────────────────────────────────────────────

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

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

const heroSchema = new mongoose.Schema(
  {
    badge: { type: String, default: "" },
    titleMain: { type: String, default: "" },
    titleHighlight: { type: String, default: "" },
    description: { type: String, default: "" },
    valueProps: { type: [valuePropSchema], default: [] },
  },
  { _id: false },
);

const formOptionSchema = new mongoose.Schema(
  {
    label: { type: String, default: "" },
    value: { type: String, default: "" },
  },
  { _id: false },
);

const formFieldSchema = new mongoose.Schema(
  {
    name: { type: String, default: "" },
    label: { type: String, default: "" },
    placeholder: { type: String, default: "" },
    required: { type: Boolean, default: false },
  },
  { _id: false },
);

const formSelectFieldSchema = new mongoose.Schema(
  {
    name: { type: String, default: "" },
    label: { type: String, default: "" },
    placeholder: { type: String, default: "" },
    required: { type: Boolean, default: false },
    options: { type: [formOptionSchema], default: [] },
  },
  { _id: false },
);

const formTimelineFieldSchema = new mongoose.Schema(
  {
    name: { type: String, default: "" },
    label: { type: String, default: "" },
    options: { type: [formOptionSchema], default: [] },
  },
  { _id: false },
);

const formFieldsSchema = new mongoose.Schema(
  {
    firstName: { type: formFieldSchema, default: () => ({}) },
    lastName: { type: formFieldSchema, default: () => ({}) },
    email: { type: formFieldSchema, default: () => ({}) },
    phone: { type: formFieldSchema, default: () => ({}) },
    program: { type: formSelectFieldSchema, default: () => ({}) },
    timeline: { type: formTimelineFieldSchema, default: () => ({}) },
  },
  { _id: false },
);

const formSchema = new mongoose.Schema(
  {
    heading: { type: String, default: "" },
    description: { type: String, default: "" },
    fields: { type: formFieldsSchema, default: () => ({}) },
    consentText: { type: String, default: "" },
    submitLabel: { type: String, default: "" },
    footerText: { type: String, default: "" },
    successMessage: { type: String, default: "" },
    errorMessage: { type: String, default: "" },
  },
  { _id: false },
);

// ── Root schema ───────────────────────────────────────────────────────────────

const requestInfoSchema = new mongoose.Schema(
  {
    slug: {
      type: String,
      required: true,
      unique: true,
      default: "request-info",
    },
    metadata: { type: metadataSchema, default: () => ({}) },
    hero: { type: heroSchema, default: () => ({}) },
    form: { type: formSchema, default: () => ({}) },
  },
  { timestamps: true },
);

/**
 * Seed / migrate từ file JSON (cùng shape với API frontend).
 * Idempotent — chạy lại không tạo trùng.
 */
requestInfoSchema.statics.migrateFromJson = async function (jsonData) {
  const slug = "request-info";
  const payload = {
    slug,
    metadata: jsonData.metadata || {},
    hero: jsonData.hero || {},
    form: jsonData.form || {},
  };

  const existing = await this.findOne({ slug });
  if (existing) {
    existing.set(payload);
    await existing.save();
    return existing;
  }
  return this.create(payload);
};

module.exports = mongoose.model("RequestInfo", requestInfoSchema);