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//Greeting Library


// 1. create self initialing function, which takes two params
;(function (global, $) {
    
  // 3. set Greetr to a constructor function that returns an new Object
    var Greetr = function (firstName, lastName, language) {
        return new Greetr.init(firstName, lastName, language);
    }
    //Hidden within the scope of the IIFE
    var supportedLangs = ['en', 'es'];
    //informal greetings
    var greetings = {
        en: "hello",
        es: 'Hola'
    };
    //formal greetings
    var formalGreetings = {
        en: 'Greetings',
        es: 'Saludos'
    };
    // login messages
    var logMessages = {
        en: 'logged in',
        es: 'inicio sesion'
    }
    
    // 6. Create our prototype containing required methods
    
    Greetr.prototype = {
        
        fullName: function () {
            return this.firstName + ' ' + this.lastName;
        },
        
        validate: function () {
           if (supportedLangs.indexOf(this.language) === -1) {
                throw "invalid laguage";
            }
        },
        
        greeting: function () {
            return greetings[this.language] + ' ' + this.firstName;
        },
        
        formalGreeting: function () {
            return formalGreetings[this.language] + ' ' + this.fullName();
        },
        
        greet: function (formal) {
            var msg
            
            if (formal) {
                msg = this.formalGreeting();
            } else {
                msg = this.greeting();
            }
            
            if (console) {
                console.log(msg);
            }
            
            return this;
        },
        
        setLang: function(lang) {
        this.language = lang;
        this.validate();
        return this;
    },
        
        log: function(){
        if (console){
       console.log(logMessages[this.language] + ': ' + this.fullName());
        }
       return this;  
    },
        HTMLGreeting: function(selector, formal){
            if (!$) {
                throw 'jQuery not loaded';
            }
            
            if (!selector) {
                throw 'invalid selector';
            }
            var msg;
            if (formal) {
                msg = this.formalGreeting();
            } else {
                msg = this.greeting();
            }
            
            $(selector).html(msg);
            return this;
        }
    };
   // 4. create our function to set default values to be used by our prototype methods 
    Greetr.init = function (firstName, lastName, language){
        
        var self = this;
        self.firstName = firstName || '';
        self.lastName = lastName || '';
        self.language = language || "en";
    }
    
    // 5. Set our greetr.init functions protptype to our Greetr Prototype to access is methods
    
    Greetr.init.prototype = Greetr.prototype;
    
    // 7. Create global variable Greetr equal to Greetr & global.G$ to call externally
    
    global.Greetr = global.G$ = Greetr;
    
}(window, jQuery)); // 2. pass the function the window as the global object and jQuery

// set g to our framework passing name parameters;
var g = G$('Mike', 'Smith');

//g.greet().setLang('es').greet(true);

// locate our button to attach event 
var btnlogin = $('#login');

// button on click event
btnlogin.on('click', function () {
 //pass language from the selected option, tag to render the result to and true for formal greeting - also log to console   
    g.setLang($('#selectLang').val()).HTMLGreeting('#greeting', true).log();
    
});