import mongoose, { Document, Schema } from "mongoose";

export interface IUrl extends Document {
  urlId: string; // The shortened URL ID
  originalUrl: string; // The original long URL
  shortUrl: string; // The complete shortened URL
  clicks: number; // Track number of clicks/redirects
  createdAt: Date; // When the shortened URL was created
  expiresAt?: Date; // Optional expiration date
}

const urlSchema = new Schema<IUrl>(
  {
    urlId: {
      type: String,
      required: true,
      unique: true,
    },
    originalUrl: {
      type: String,
      required: true,
    },
    shortUrl: {
      type: String,
      required: true,
    },
    clicks: {
      type: Number,
      required: true,
      default: 0,
    },
    createdAt: {
      type: Date,
      default: Date.now,
    },
    expiresAt: {
      type: Date,
      default: null,
    },
  },
  {
    timestamps: true,
  }
);

// Add indexes for high-performance lookups
urlSchema.index({ originalUrl: 1 });

// Export the model
export const Url = mongoose.model<IUrl>("Url", urlSchema);

// Function to create a model with custom collection name
export function createUrlModel(collectionName: string = "urls") {
  return mongoose.model<IUrl>(collectionName, urlSchema, collectionName);
}