import mongoose, { Types } from "mongoose";
const { Schema } = mongoose;

const SessionsSchema = new Schema({
  teacherId: {
    type: Types.ObjectId,
    required: true
  },
  userId: {
    type: Types.ObjectId,
    required: false
  },
  startTime: {
    type: Date,
  },
  endTime: {
    type: Date,
  },
  status: {
    type: String,
    enum: ['BOOKED', 'AVAILABLE', 'COMPLETED'],
    default: 'AVAILABLE',
    required: true
  },
  completedAt: {
    type: Date
  }
}, { timestamps: true });

SessionsSchema.index({ userId: 1 });
SessionsSchema.index({ status: 1, startTime: 1 });

const Sessions = mongoose.model('sessions', SessionsSchema);
export default Sessions;