var mongoose = require('mongoose');
var validate = require('mongoose-validator');
var Schema = mongoose.Schema;
var crypto = require('crypto');
var utilities = require('../services/utilities');

var userSchema = new Schema({
    firstname: { type : String, trim : true },
    lastname: { type : String, trim : true },
    username: { type: String, required: true, unique: true, lowercase: true, trim : true, index : true },
    password: { type: String, validate: passwordValidator },
    email: { type : String, trim : true, validate: emailValidator },
    phone: { type : String, trim : true },
    address: { type : String, trim : true },
    groups: [{ type : Schema.Types.ObjectId, ref : 'Group' }],
    created_at: Date,
    updated_at: Date
},
{
    toObject: { virtuals: true },
    toJSON: { virtuals: true }
});

userSchema.virtual('fullname').get(function () {
    return [this.firstname, this.lastname].filter(Boolean).join(' ');
});

userSchema.pre('save', function (next) {
    if (this.password) {
        this.password = encrypt(this.password);
    }
    utilities.reviewDate(this);
    next();
});

function encrypt(text) {
    return crypto.createHash("SHA512").update(text).digest("base64");
}

var emailValidator = [
    validate({
        validator: 'isEmail',
        message: 'Please fill a valid email address'
    })
];

var passwordValidator = [
    validate({
        validator: 'isLength',
        arguments: [6, 50],
        message: 'Password should be between {ARGS[0]} and {ARGS[1]} characters'
    }),
    validate({
        validator: 'matches',
        arguments: /\d/,
        message: 'Password should contain numbers'
    }),
    validate({
        validator: 'matches',
        arguments: /[a-zA-Z]/,
        message: 'Password should contain letters'
    }),
    validate({
        validator: 'matches',
        arguments: /[A-Z]/,
        message: 'Password must contain one uppercase letter'
    }),
    validate({
        validator: 'matches',
        arguments: /[\!\@\#\$\%\^\&\*\(\)\_\+\.\,\;\:]/,
        message: 'Password should contain a special characters like !@#$%^&*()_+'
    })
];

module.exports = mongoose.model('User', userSchema);