Task.js

const mongoose = require('mongoose');

const taskSchema = new mongoose.Schema(
  {
    title: {
      type: String,
      required: [true, 'Title is required'],
      trim: true,
      maxlength: [200, 'Title cannot exceed 200 characters'],
    },
    description: {
      type: String,
      trim: true,
      default: '',
    },
    completed: {
      type: Boolean,
      default: false,
    },
    priority: {
      type: String,
      enum: ['low', 'medium', 'high'],
      default: 'medium',
    },
    dueDate: {
      type: Date,
      default: null,
    },
    tags: {
      type: [String],
      default: [],
    },
  },
  { timestamps: true }
);

taskSchema.virtual('isOverdue').get(function () {
  if (!this.dueDate || this.completed) return false;
  return new Date() > this.dueDate;
});

taskSchema.set('toJSON', { virtuals: true });

module.exports = mongoose.model('Task', taskSchema);