const mongoose = require('mongoose'),
  Schema = mongoose.Schema,
  { SubType } = require('./subscription');

const schema = new Schema({
  userId: { type: Schema.Types.ObjectId, ref: 'User', index: true, required: true },
  subType: {
    type: {
      type: String,
      enum: {
        values: Object.values(SubType),
        message: '{VALUE} for subscription \'type\' is not supported'
      }
    }
  },
  periodStart: { type: Number, require: true },
  periodEnd: { type: Number, require: true },
  custId: { type: String },     // Stripe customer Id
  lookupKey: { type: String },  // The lookup key for the price used within the subscription in the billing period
});

schema.index({ custId: 1, subType: 1 });

module.exports = mongoose.model('Bill_Period', schema);