//Task 1 - Object Creation (10 points) Create an object named student with the following properties:



let student = { //Create an object called student
    firstName: "Man",
    lastName: "Tran",
    age: 19,
    courses: ["Web Programming", "OOP_JAVA", "Perspectives on World Issues"] //Create a courses array
}

//Task 2: Object Manipulation (15 points) Add the following properties and methods to the student object:

student.addCourse = function(courseName){ //create a methods to the student object to add a course
    this.courses.push(courseName); //Add a course into the courses array
    console.log(`${courseName} has been added to your course library.`);
}

student.removeCourse = function(courseName){ //create a methods to the student object to remove a course


    if (student.courses.includes(courseName)){ //Using .includes in this condition statement to make sure the course is in the courses array. Otherwise, it will pass to the else statement.
        
        this.courses.slice(student.courses.indexOf(courseName),1)  //Using .slice to remove a course from the courses array. Moreover, .indexOf(courseName),1 is to find the index number of the removing course, and 1 is the quantity.
        console.log (`${courseName} has been removed from your course library`);
    }
    else{
        console.log(`There is no course named ${courseName} in your course library`);
    }

}

student.getInfo = function(){
    return `Student name: ${student.firstName} ${student.lastName}\nAge: ${student.age}`// Output: Student name: Man Tran 
                                                                                        //         Age: 19
}


//Task 3: Object Access (10 points) Create a function that accepts the student object as a parameter and displays the list of courses the student is studying. Call this function and display the course list.

function courseDisplay(student){ //Create a function that responsibles for listing the courses the student are enrolled in.

    console.log(`Student ${student.firstName} ${student.lastName} is currently enrolled in: ${student.courses.join(", ")}.`);
    
}

courseDisplay(student); //Call the function


//Task 4: Object Iteration (15 points) Create an object named grades with the following properties:

let grades = { // Create a grades object
    "Math":"A-",
    "Literature" : "C",
    "English" : "B"
};

function gradesDisplay(grades){ //Create a function that prints out the list of courses and their grades
    for (let courses2 in grades){ //let course2 in grades means assigns course2 as a name of keys (courses) => for (let courses2 in grades) means this loop keeps running until all of the courses2 are listed
        console.log(`${courses2}: ${grades[courses2]}` ); //courses2 are the courses, grades[courses2] are the values of the corresponding keys
    }
}   

gradesDisplay(grades); //call the function

// Task 5: Object Inheritance (10 points) Create a new object named internationalStudent that inherits from the student object. Add a property called country to the internationalStudent object, representing your home country.

let internationalStudent = Object.create(student); //Create an internationalStudent object that are copied from the student object

internationalStudent.country = "Viet Nam"; //Add a country property into internationalStudent object

//Task 6: Object Comparison (10 points) Create a function that compares the student and internationalStudent objects. Determine if they are the same student based on their first name, last name, and age. Display a message indicating whether they are the same student or not.

function studentComparison(student, internationalStudent){ //Create a function to compare internationalStudent object and student object
    if(student.firstName == internationalStudent.firstName && student.lastName == internationalStudent.lastName && student.age == internationalStudent.age){// if T/F * T/F * T/F
        console.log("They are the same student");
    }
    else{
        console.log("They are not the same student");
    }
}

studentComparison(student, internationalStudent); //call the function