const mongoose = require('mongoose');

const knowledgeSourceSchema = new mongoose.Schema(
  {
    eventId: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'Event',
      required: true,
      index: true,
    },
    type: {
      type: String,
      enum: ['url', 'pdf', 'event'],
      required: true,
    },
    sourcePath: { type: String, required: true },
    displayName: { type: String, required: true },
    status: {
      type: String,
      enum: ['PENDING', 'PROCESSING', 'READY', 'FAILED'],
      default: 'PENDING',
    },
    errorMessage: { type: String, default: null },
    lastSyncedAt: { type: Date, default: Date.now },
    /** URL sources: domain-wide or path-prefix crawl */
    crawlScope: { type: String, enum: ['domain', 'path'], default: null },
    crawlPathPrefix: { type: String, default: null },
    lastCrawlStats: {
      pages: { type: Number, default: 0 },
      assets: { type: Number, default: 0 },
      skipped: { type: Number, default: 0 },
      failed: { type: Number, default: 0 },
    },
  },
  { timestamps: true },
);

knowledgeSourceSchema.index({ eventId: 1, type: 1 });

module.exports = mongoose.model('KnowledgeSource', knowledgeSourceSchema);