const mongoose = require('mongoose')
const timestamp = require('mongoose-timestamp')

const storySchema = new mongoose.Schema({
  user_id: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true,
    index: true
  },
  media_path: {
    type: String,
    required: true
  },
  media_type: {
    type: String,
    enum: ['image', 'video'],
    required: true
  },
  expires_at: {
    type: Date,
    required: true,
    index: true
  },
  viewers: [{
    user_id: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'User'
    },
    viewed_at: {
      type: Date,
      default: Date.now
    }
  }]
})

storySchema.index({ expires_at: 1 }, { expireAfterSeconds: 0 })

storySchema.plugin(timestamp)

module.exports = mongoose.model('Story', storySchema)