const mongoose = require('mongoose');
const bcrypt = require('bcryptjs');

const userSchema = new mongoose.Schema(
  {
    name: {
      type: String,
      required: [true, 'Name is required'],
      trim: true
    },
    email: {
      type: String,
      required: [true, 'Email is required'],
      unique: true,
      trim: true,
      lowercase: true,
      match: [/^\w+([.-]?\w+)*@\w+([.-]?\w+)*(\.\w{2,3})+$/, 'Please enter a valid email']
    },
    password: {
      type: String,
      required: [true, 'Password is required'],
      minlength: [6, 'Password must be at least 6 characters long'],
      select: false
    },
    role: {
      type: String,
      enum: ['customer', 'staff', 'admin'],
      default: 'customer'
    },
    phone: {
      type: String,
      trim: true
    },
    address: {
      type: String,
      trim: true
    },
    active: {
      type: Boolean,
      default: true
    }
  },
  {
    timestamps: true
  }
);

// Password hashing middleware
userSchema.pre('save', async function (next) {
  if (!this.isModified('password')) {
    return next();
  }
  
  try {
    const salt = await bcrypt.genSalt(10);
    this.password = await bcrypt.hash(this.password, salt);
    next();
  } catch (error) {
    next(error);
  }
});

// Compare password method
userSchema.methods.comparePassword = async function (candidatePassword) {
  return await bcrypt.compare(candidatePassword, this.password);
};

const User = mongoose.model('User', userSchema);

module.exports = User;