/*
 * Copyright 2025 John G Stroh
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Sync Metadata Model
 * Tracks cross-environment data synchronization state
 */

const mongoose = require('mongoose');

const syncMetadataSchema = new mongoose.Schema({
  // Sync type identifier
  type: {
    type: String,
    required: true,
    unique: true,
    enum: ['prod_audit', 'prod_blog', 'prod_documents']
  },

  // Last successful sync timestamp
  last_sync_time: {
    type: Date,
    required: true
  },

  // Source environment
  source_environment: {
    type: String,
    required: true,
    enum: ['production', 'staging']
  },

  // Sync statistics
  stats: {
    total_synced: { type: Number, default: 0 },
    last_batch_size: { type: Number, default: 0 },
    last_batch_duration_ms: { type: Number, default: 0 },
    errors_count: { type: Number, default: 0 }
  },

  // Last sync result
  last_result: {
    success: Boolean,
    error_message: String,
    synced_count: Number,
    timestamp: Date
  }
}, {
  timestamps: true
});

module.exports = mongoose.model('SyncMetadata', syncMetadataSchema);