const mongoose = require("mongoose");

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

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

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

const channelSchema = new mongoose.Schema(
  {
    icon: { type: String, trim: true, default: "" },
    title: { type: String, trim: true, default: "" },
    detail: { type: String, trim: true, default: "" },
    subDetail: { type: String, trim: true, default: "" },
  },
  { _id: false }
);

const supportHourSchema = new mongoose.Schema(
  {
    day: { type: String, trim: true, default: "" },
    time: { type: String, trim: true, default: "" },
  },
  { _id: false }
);

const infoCardsSchema = new mongoose.Schema(
  {
    contactInfo: {
      title: { type: String, trim: true, default: "" },
      channels: { type: [channelSchema], default: [] },
    },
    supportHours: {
      title: { type: String, trim: true, default: "" },
      hours: { type: [supportHourSchema], default: [] },
      footer: {
        text: { type: String, trim: true, default: "" },
        linkText: { type: String, trim: true, default: "" },
        linkHref: { type: String, trim: true, default: "" },
      },
    },
  },
  { _id: false }
);

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

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

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

const formSchema = new mongoose.Schema(
  {
    heading: { type: String, trim: true, default: "" },
    description: { type: String, trim: true, default: "" },
    fields: {
      firstName: { type: simpleFieldSchema, default: () => ({}) },
      lastName: { type: simpleFieldSchema, default: () => ({}) },
      email: { type: simpleFieldSchema, default: () => ({}) },
      phone: { type: simpleFieldSchema, default: () => ({}) },
      inquiryType: { type: inquiryFieldSchema, default: () => ({}) },
      message: { type: simpleFieldSchema, default: () => ({}) },
    },
    submitLabel: { type: String, trim: true, default: "Send Message" },
    successMessage: { type: String, trim: true, default: "" },
    errorMessage: { type: String, trim: true, default: "" },
  },
  { _id: false }
);

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

const faqSchema = new mongoose.Schema(
  {
    title: { type: String, trim: true, default: "" },
    subtitle: { type: String, trim: true, default: "" },
    items: { type: [faqItemSchema], default: [] },
  },
  { _id: false }
);

const ctaButtonSchema = new mongoose.Schema(
  {
    label: { type: String, trim: true, default: "" },
    href: { type: String, trim: true, default: "" },
  },
  { _id: false }
);

const ctaSchema = new mongoose.Schema(
  {
    title: { type: String, trim: true, default: "" },
    description: { type: String, trim: true, default: "" },
    primaryButton: { type: ctaButtonSchema, default: () => ({}) },
    secondaryButton: { type: ctaButtonSchema, default: () => ({}) },
  },
  { _id: false }
);

// ─────────────────────────────────────────────
// Main Contact Schema (slug-based, same pattern
// as StudentSupport / RequestInfo)
// ─────────────────────────────────────────────
const contactSchema = new mongoose.Schema(
  {
    slug: { type: String, default: "contact", unique: true },
    metadata: { type: metadataSchema, default: () => ({}) },
    hero: { type: heroSchema, default: () => ({}) },
    infoCards: { type: infoCardsSchema, default: () => ({}) },
    form: { type: formSchema, default: () => ({}) },
    faq: { type: faqSchema, default: () => ({}) },
    cta: { type: ctaSchema, default: () => ({}) },
  },
  { timestamps: true }
);

// ─────────────────────────────────────────────
// Migration helper (idempotent upsert)
// ─────────────────────────────────────────────
contactSchema.statics.migrateFromJson = async function (jsonData) {
  const payload = {
    metadata: jsonData.metadata || {},
    hero: jsonData.hero || {},
    infoCards: jsonData.infoCards || {},
    form: jsonData.form || {},
    faq: jsonData.faq || {},
    cta: jsonData.cta || {},
  };

  const existing = await this.findOne({ slug: "contact" });
  if (existing) {
    existing.set(payload);
    await existing.save();
    console.log("✅ Contact data updated via migration.");
    return existing;
  } else {
    const created = await this.create({ slug: "contact", ...payload });
    console.log("✅ Contact data created via migration.");
    return created;
  }
};

module.exports = mongoose.model("Contact", contactSchema);