const mongoose = require('mongoose');

const answerSchema = new mongoose.Schema({
  answeredBy: { type: mongoose.Schema.Types.ObjectId, ref: 'User' },
  answer: String,
  answeredAt: { type: Date, default: Date.now },
  isOfficial: { type: Boolean, default: false },
});

const questionSchema = new mongoose.Schema(
  {
    event: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'Event',
      required: true,
    },
    session: { type: mongoose.Schema.Types.ObjectId, ref: 'Session' },
    participant: { type: mongoose.Schema.Types.ObjectId, ref: 'Participant' },
    user: { type: mongoose.Schema.Types.ObjectId, ref: 'User' },
    question: { type: String, required: true },
    isAnonymous: { type: Boolean, default: false },
    status: {
      type: String,
      enum: ['pending', 'answered', 'archived'],
      default: 'pending',
    },
    upvotes: { type: Number, default: 0 },
    downvotes: { type: Number, default: 0 },
    /**
     * Audience votes: `key` is browser voterKey (anonymous) or participant ObjectId string (logged-in visitor).
     */
    audienceVotes: [
      {
        key: { type: String, required: true },
        dir: { type: String, enum: ['up', 'down'], required: true },
      },
    ],
    upvotedBy: [{ type: mongoose.Schema.Types.ObjectId, ref: 'User' }],
    answers: [answerSchema],
  },
  { timestamps: true }
);

questionSchema.index({ event: 1 });
questionSchema.index({ session: 1 });
module.exports = mongoose.model('Question', questionSchema);