// models/visa.js

const mongoose = require("mongoose");

// ==================== SCHEMAS ====================

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

// VisaTypeCategory Schema
const VisaTypeCategorySchema = new mongoose.Schema(
    {
        category: { type: String, default: "" },
        items: [VisaItemSchema],
    },
    { _id: false },
);

// VisaProcessStep Schema
const VisaProcessStepSchema = new mongoose.Schema(
    {
        number: { type: String, default: "" },
        title: { type: String, default: "" },
        description: { type: String, default: "" },
    },
    { _id: false },
);

// VisaProcess Schema
const VisaProcessSchema = new mongoose.Schema(
    {
        title: { type: String, default: "" },
        steps: [VisaProcessStepSchema],
    },
    { _id: false },
);

// VisaCategory Schema
const VisaCategorySchema = new mongoose.Schema(
    {
        title: { type: String, default: "" },
        steps: {
            type: [[String]],
            default: [],
        },
    },
    { _id: false },
);

// VisaService Schema
const VisaServiceSchema = new mongoose.Schema(
    {
        title: { type: String, default: "" },
        steps: [VisaProcessStepSchema],
    },
    { _id: false },
);

// RelatedCountry Schema
const RelatedCountrySchema = new mongoose.Schema(
    {
        id: { type: Number, default: 0 },
        name: { type: String, default: "" },
        icon: { type: String, default: "" },
    },
    { _id: false },
);

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

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

// Location Schema
const LocationSchema = new mongoose.Schema(
    {
        label: { type: String, default: "" },
        address: { type: String, default: "" },
    },
    { _id: false },
);

// ContactInfo Schema
const ContactInfoSchema = new mongoose.Schema(
    {
        img: { type: String, default: "" },
        sectionTitle: { type: String, default: "" },
        helpText: { type: String, default: "" },

        phone: {
            type: PhoneSchema,
            default: () => ({}),
        },
        email: {
            type: EmailSchema,
            default: () => ({}),
        },
        location: {
            type: LocationSchema,
            default: () => ({}),
        },
    },
    { _id: false },
);

// ActiveCountry Schema
const ActiveCountrySchema = new mongoose.Schema(
    {
        id: { type: Number, default: 0 },
        name: { type: String, default: "" },
        title: { type: String, default: "" },
        mainImage: { type: String, default: "" },
        description: { type: String, default: "" },
        additionalInfo: { type: String, default: "" },
        tagline: { type: String, default: "" },
        visaTypes: [VisaTypeCategorySchema],
        visaProcess: {
            type: VisaProcessSchema,
            default: null,
        },
        gallery: {
            type: [String],
            default: [],
        },
        visaCategories: {
            type: VisaCategorySchema,
            default: null,
        },
        visaService: {
            type: VisaServiceSchema,
            default: null,
        },
    },
    { _id: false },
);

// DetailedView Schema
const DetailedViewSchema = new mongoose.Schema(
    {
        activeCountry: {
            type: ActiveCountrySchema,
            default: null,
        },
        relatedCountries: {
            type: [RelatedCountrySchema],
            default: [],
        },
        contactInfo: {
            type: ContactInfoSchema,
            default: null,
        },
    },
    { _id: false },
);

// ==================== MAIN VISA COUNTRY SCHEMA ====================

// Main VisaCountry Schema (Individual country object)
const VisaCountrySchema = new mongoose.Schema(
    {
        // Không dùng `index: true` ở đây vì đã tạo index riêng cho hero.summaryList.* bên dưới
        id: { type: Number, required: true },
        name: { type: String, required: true },
        slug: { type: String, required: true },
        icon: { type: String, default: "" },
        services: {
            type: [String],
            default: [],
        },
        detailedView: {
            type: DetailedViewSchema,
            default: null,
        },
    },
    { _id: false },
);

// ==================== HERO SCHEMA ====================

const HeroSchema = new mongoose.Schema(
    {
        title: { type: String, default: "Visa" },
        summaryList: {
            type: [VisaCountrySchema],
            default: [],
        },
    },
    { _id: false },
);

// ==================== MAIN VISA SCHEMA ====================

const visaDataSchema = new mongoose.Schema(
    {
        hero: {
            type: HeroSchema,
            default: () => ({ title: "Visa", summaryList: [] }),
        },
    },
    {
        timestamps: true,
    },
);

// ==================== INDEXES ====================

visaDataSchema.index({ "hero.summaryList.slug": 1 });
visaDataSchema.index({ "hero.summaryList.id": 1 });
visaDataSchema.index({ "hero.summaryList.name": 1 });

// ==================== MODEL ====================

module.exports = mongoose.models.Visa || mongoose.model("Visa", visaDataSchema);