// /components/certificates/certificateModel.js

const mongoose = require('mongoose');

const certificateSchema = new mongoose.Schema({
  user: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true,
    index: true
  },
  course: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Course',
    index: true
  },
  title: {
    type: String,
    required: true,
    trim: true
  },
  issuer: {
    type: String,
    trim: true
  },
  /** Permanent object key inside the certificates bucket */
  fileKey: {
    type: String,
    required: true,
    trim: true
  },
  /** Original uploaded filename */
  fileName: {
    type: String,
    trim: true
  },
  /** Legacy alias kept in sync with fileName */
  originalName: {
    type: String,
    trim: true
  },
  /** Public URL only when the certificates bucket is public; otherwise null */
  fileUrl: {
    type: String,
    trim: true,
    default: null
  },
  bucket: {
    type: String,
    trim: true,
    default: 'certificates'
  },
  mimeType: {
    type: String,
    trim: true
  },
  issuedAt: {
    type: Date,
    default: Date.now
  },
  isOfficial: {
    type: Boolean,
    default: false
  }
}, {
  timestamps: true
});

module.exports = mongoose.model('Certificate', certificateSchema);