import mongoose, { Document, Schema } from 'mongoose';
import bcrypt from 'bcryptjs';

export interface IUser extends Document {
  _id: string;
  email: string;
  password: string;
  username: string;
  comparePassword(candidatePassword: string): Promise<boolean>;
}

const UserSchema = new Schema(
  {
    email: {
      type: String,
      required: [true, 'Email is required'],
      unique: true,
      trim: true,
      lowercase: true,
    },
    password: {
      type: String,
      required: [true, 'Password is required'],
      minlength: 6,
    },
    username: {
      type: String,
      required: [true, 'Username is required'],
      trim: true,
    },
  },
  { timestamps: true }
);

// Hash password before saving
UserSchema.pre('save', async function (next) {
  const user = this;
  if (!user.isModified('password')) return next();

  try {
    const salt = await bcrypt.genSalt(10);
    user.password = await bcrypt.hash(user.password, salt);
    next();
  } catch (error: any) {
    next(error);
  }
});

// Compare password method
UserSchema.methods.comparePassword = async function (candidatePassword: string): Promise<boolean> {
  return bcrypt.compare(candidatePassword, this.password);
};

export default mongoose.model<IUser>('User', UserSchema);