const mongoose = require('mongoose');

const expenseSchema = new mongoose.Schema(
  {
    category: {
      type: String,
      required: [true, 'Expense must have a category'],
      enum: [
        'marketing',
        'salaries',
        'tools',
        'hosting',
        'shipping',
        'packaging',
        'rent',
        'utilities',
        'taxes',
        'refunds',
        'other',
      ],
      trim: true,
    },
    amount: {
      type: Number,
      required: [true, 'Expense must have an amount'],
      min: [0, 'Amount must be positive'],
    },
    date: {
      type: Date,
      required: [true, 'Expense must have a date'],
      default: Date.now,
    },
    notes: {
      type: String,
      trim: true,
      default: '',
    },
    createdBy: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'User',
      required: [true, 'Expense must be created by a user'],
    },
  },
  {
    timestamps: true,
  },
);

expenseSchema.index({ date: -1 });
expenseSchema.index({ category: 1 });
expenseSchema.index({ createdAt: -1 });

const Expense = mongoose.model('Expense', expenseSchema);

module.exports = Expense;