const mongoose = require('mongoose');

const chatSubscriberSchema = new mongoose.Schema(
  {
    eventId: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'Event',
      required: true,
      index: true,
    },
    attendeeId: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'Participant',
      default: null,
    },
    phoneNumber: { type: String, required: true, index: true },
    sessionState: {
      type: String,
      enum: ['WELCOME_FORK', 'AWAITING_TICKET', 'MAIN_MENU', 'LOCAL_GUIDE_MODE'],
      default: 'WELCOME_FORK',
    },
    metaContext: {
      guestModeEnabled: { type: Boolean, default: false },
      lastMenuInteraction: { type: Date, default: Date.now },
    },
  },
  { timestamps: true },
);

chatSubscriberSchema.index({ eventId: 1, phoneNumber: 1 }, { unique: true });

module.exports = mongoose.model('ChatSubscriber', chatSubscriberSchema);