/*
 *   Intro to Programming CSE 1310
 * University of Texas at Arlington
 */

package code19feb19extras;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;
import java.util.Scanner;

/**
 *
 * @author jcmtiernan
 */
public class Code19Feb19extras 
{

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) 
    {
        // Choices
        
        /*
        Class has 3 tests worth 60% of final grade
        Final 40%
            Do a research project 40%
            OR
            Take two more tests for 40% of grade
            OR
            Write 8 lab reports for 40% of grade
        
        Assumption: all grades are out of 100
        Algorithm for final grade:
        
        Average the 3 tests and mult by percentage (60)
        Find out how they are doing the final 40%
        if student chose the research project
            multiply project grade by 40% and save as final40Pct
        else if student chose two tests
            Average the 2 tests and mult by percentage (40) and save as final40Pct
        else if student chose 8 reports
            Average 8 reports and mult by percentage (40) and save as final40Pct
        // Final grade is 3 test value plus whichever they chose
        Final grade is 3 test value plus final40Pct
       
        */
        /*
        SEE NOTES WITH LABEL # for new/interesting topics
        SEE gradeInputErr for types of invalid data
        In gradeInputErr, all data for single student is on single line
        */
        
        // How do we enter grades for multiple students during the same run of the program?

        File inputFile = new File("gradeInputErrEst2.txt");
        Scanner userInFile;
        boolean fileValid = true;
        try
        {
            userInFile = new Scanner(inputFile);
        }
        catch (FileNotFoundException fnfe) //fnfe is a variable that will hold the exception info
        {
            userInFile = new Scanner(System.in);
            System.out.println("-- Input file was not found.  Enter the data as prompted. ");
            System.out.println(fnfe);  // print the Exception error message            
            fileValid = false;
        }
        //Scanner userIn = new Scanner(System.in);
        double test1=0, test2=0, test3=0;
        int studentCount = 0;  // # keep a count of the students
        // # How would we calculate class average?  Class minimum?  Class maximum?

        // ^^ Find class max grade, class min grade and average
        double min = 101;
        double max = -1;
        double avg = 0;
        
        String lineIn;
        Scanner userIn;
        double estGrade = 0;
        boolean validData = true;
        
        while (userInFile.hasNextInt())
        {
            validData = true;
            lineIn = userInFile.nextLine();
            userIn = new Scanner(lineIn);
            // ^^** Added extra data on line of input file - student estimated grade
            //    Will read in, then also print difference from actual with message
            //    Use formatted output to print the floating point values
            
            // ^^** Modify nested if else with char response to be a switch
            
            // ^^## Find class max grade, class min grade and average
            
            // ^^## Read digit input as strings and convert   
            
            // ^^## Conditional operator in output

            // ^^## Validate input range ex. (0 - 100)
            
            
            studentCount++;
            System.out.println("Student "+studentCount+": ");  // # header for each student
            if (!fileValid)
            {
                System.out.println("Please enter the three test grades separated by spaces: ");
            }
            try  // # error checking from input file data that could cause InputMismatchException
            {
                test1 = userIn.nextDouble();
                test2 = userIn.nextDouble();
                test3 = userIn.nextDouble();
            }
            catch (InputMismatchException imme) // # imme is a variable that will hold the exception info
            {
                System.out.println("-- There was invalid test data in the file. Setting grades to 0");
                System.out.println("-- "+imme);      // # print the Exception error message              
                test1 = 0;
                test2 = 0;
                test3 = 0;
                validData = false;
            }
            
            
            // ^^## Validate input range ex. (0 - 100)
            // This is hard coding the ranges and tests 
            /*
            if (test1 > 110)  
            {
                System.out.println("-- Test 1 value out of range high. Setting grade to 110");
                test1 = 110;
            } 
            if (test2 > 110)
            {
                System.out.println("-- Test 2 value out of range high. Setting grade to 110");
                test2 = 110;
            } 
            if (test3 > 110)
            {
                System.out.println("-- Test 3 value out of range high. Setting grade to 110");
                test3 = 110;
            } 
            if  (test1 < 0)
            {
                System.out.println("-- Test 1 value out of range low. Setting grade to 0");
                test1 = 0;
            } 
            if (test2 < 0) 
            {
                System.out.println("-- Test 2 value out of range low. Setting grade to 0");
                test2 = 0;
            } 
            if (test3 < 0)
            {
                System.out.println("-- Test 3 value out of range low. Setting grade to 0");
                test3 = 0;
            }     
            */
            // using a method to validate test grades
            test1 = checkTestGrade(test1, 1, 110, 0);
            test2 = checkTestGrade(test2, 2, 110, 0);
            test3 = checkTestGrade(test3, 3, 110, 0);

            // Class has 3 tests worth 60% of final grade
            
            System.out.println("The input test grades are "+test1+", "+test2+", and "+test3+"\n");
            double test60Pct = (test1 + test2+ test3)/3 * .6;
            System.out.println("The test average is "+test60Pct+" out of 60%");

            // Find out how they are doing the final 40%
            if (!fileValid)
            {
                System.out.println("\nWhich choice did you make for the final 40% of your grade?");
                System.out.println("A. Reseach project");
                System.out.println("B. Two additional tests");
                System.out.println("C. Eight reports");
                System.out.println("Please enter A, B, or C for your choice:");
            }


            char response = 'Z';
            //String resp = "";
            //resp = userIn.next();
            //response = resp.charAt(0);

            // # Can this input from the file ever cause an error?  [Special case is if file is empty]

            response = userIn.next().charAt(0);
            System.out.print("The entered choice is : "+response+"\n");
            // we are NOT going to do input validation (but later...)
            // at this point response should have 'A' or 'B' or 'C'
            /*
            if student chose the research project
                multiply project grade by 40% and save as final40Pct
            else if student chose two tests
                Average the 2 tests and mult by percentage (40) and save as final40Pct
            else if student chose 8 reports
                Average 8 reports and mult by percentage (40) and save as final40Pct

            */
            double final40Pct = 0;

            // ^^ Modify nested if else with char response to be a switch            
            // nested if-else structure
            
            switch (response)
            {
                case 'A':  
                case 'a':
            //if ((response == 'A') || (response == 'a')) // if (test for project choice) 
                {
                    // true - statement to execute
                    double project;
                    if (!fileValid)
                        System.out.println("Enter the project grade 0.0 - 100.0 ");

                    // ^^## Read digit input as strings and convert
                    String proj = userIn.next();  // read input as String            
                    try
                    {
                        project = Double.parseDouble(proj);  // try to convert String to double
                    }
                    catch (NumberFormatException nfe)  // error if String is not numeric
                    {
                        System.out.println("-- There was invalid project data in the file. Setting grades to 0");
                        System.out.println("-- "+nfe);      // # print the Exception error message                      
                        project = 0;
                        userIn.next();
                        validData = false;                        
                    }
                    project = checkGrade(project, "Project", 1, 100, 0);
                    
                    /*
                    try  // # handling possible invalid numeric input
                    {
                        project = userIn.nextDouble();
                    }
                    catch (InputMismatchException imme) //# imme is a variable that will hold the exception info
                    {      
                        System.out.println("-- There was invalid project data in the file. Setting grades to 0");
                        System.out.println(imme);      // # print the Exception error message                      
                        project = 0;
                        userIn.next();
                    }
                    */
                    //System.out.println("The input final project grade is "+project+"\n");
                    System.out.printf("The input final project grade is %6.2e\n\n",project);
                    final40Pct = project * .4;

                    //final40Pct = userIn.nextDouble() * .4;
                    System.out.println("The project grade was "+project);
                    break;
                }
                case 'B':
                case 'b':
                // else if ((response == 'B')|| (response == 'b'))
                {
                    double test4=0, test5=0;
                    if (!fileValid)
                        System.out.println("Please enter the final two test grades separated by spaces: ");
                    try // # handling possible invalid numeric input
                    {
                        test4 = userIn.nextDouble();
                        test5 = userIn.nextDouble(); 
                    }
                    catch (InputMismatchException imme) //# imme is a variable that will hold the exception info
                    {      
                        System.out.println("-- There was invalid final test data in the file. Setting grades to 0");
                        System.out.println("-- "+imme);      // # print the Exception error message 
                        test4 = 0;
                        test5 = 0; 
                        userIn.next();
                        validData = false;
                    }
                    test4 = checkGrade(test4, "Test", 4,110, 0); //^^## validating test grade range
                    test5 = checkGrade(test5, "Test", 5, 105, 0);
                    
                    System.out.println("The input final test grades are "+test4+" and "+test5+"\n");
                    final40Pct = (test4 + test5)/2 * .4;
                    System.out.println("The final test average is "+final40Pct+" out of 40%");
                    break;
                }
                case 'C':
                case 'c':
                // else if ((response == 'C')|| (response == 'c'))
                {
                    double rpt1=0, rpt2=0, rpt3=0, rpt4=0, rpt5=0, rpt6=0, rpt7=0, rpt8=0 ;
                    if (!fileValid)
                        System.out.println("Please enter the eight report grades separated by spaces: ");
                    try // # handling possible invalid numeric input
                    {
                        rpt1 = userIn.nextDouble();
                        rpt2 = userIn.nextDouble();
                        rpt3 = userIn.nextDouble();
                        rpt4 = userIn.nextDouble();
                        rpt5 = userIn.nextDouble();  // # Note that there was an error in the data for a C choice
                        rpt6 = userIn.nextDouble();  // # that does not get caught.  Why?
                        rpt7 = userIn.nextDouble();  // # HINT: How many lines in input file vs. how many students printed
                        rpt8 = userIn.nextDouble();
                    }
                    catch (InputMismatchException imme) // # imme is a variable that will hold the exception info
                    {      
                        System.out.println("-- There was invalid reports data in the file. Setting grades to 0");
                        System.out.println("-- "+imme);      // # print the Exception error message 
                        rpt1 = 0;
                        rpt2 = 0;
                        rpt3 = 0;
                        rpt4 = 0;
                        rpt5 = 0;
                        rpt6 = 0;
                        rpt7 = 0;
                        rpt8 = 0;
                        userIn.next();
                        validData = false;
                    }

                    catch (NoSuchElementException nsee)
                    {
                        System.out.println("-- Not enough report grades in the file");
                        System.out.println("-- "+nsee);
                        rpt1 = 0;
                        rpt2 = 0;
                        rpt3 = 0;
                        rpt4 = 0;
                        rpt5 = 0;
                        rpt6 = 0;
                        rpt7 = 0;
                        rpt8 = 0;   
                        validData = false;
                    }
                    rpt1 = checkGrade(rpt1, "Report", 1, 100, 0);
                    rpt2 = checkGrade(rpt2, "Report", 2, 100, 0);
                    rpt3 = checkGrade(rpt3, "Report", 3, 100, 0);
                    rpt4 = checkGrade(rpt4, "Report", 4, 100, 0);
                    rpt5 = checkGrade(rpt5, "Report", 5, 100, 0);
                    rpt6 = checkGrade(rpt6, "Report", 6, 100, 0);
                    rpt7 = checkGrade(rpt7, "Report", 7, 100, 0);
                    rpt8 = checkGrade(rpt8, "Report", 8, 100, 0);

                    System.out.println("The input report grades are "+rpt1+", "+rpt2+", "+rpt3+", "+rpt4+", "+rpt5+", "+rpt6+", "+rpt7+", and "+rpt8+"\n");

                    final40Pct = (rpt1 + rpt2 + rpt3 + rpt4 + rpt5 + rpt6 + rpt7 + rpt8)/8 * .4;
                    System.out.println("The final report average is "+final40Pct+" out of 40%"); 
                    break;
                }   
                default:
                //else  // they did not enter A, B or C
                {
                    System.out.println("-- Your choice *"+response+"* was not valid");
                    final40Pct = 0;
                    validData = false;
                }
            }

            System.out.println("After user input final 40% is "+final40Pct);
            double courseGrade = test60Pct + final40Pct;
            // ^^## Conditional operator in output ( test ? true result : false result )
            System.out.println("\n***The final course grade is "+courseGrade
                    +" and all data is "+(validData?"":"not ")+"valid.\n");
            avg += courseGrade;  // sum all class grades to find average at end
            // ^^## Find class max grade and class min grades             
            if (courseGrade > max)
                max = courseGrade;  // find max grade
            if ((courseGrade < min) && (courseGrade != 0))
                min = courseGrade; // find min grade that isn't 0

            // ^^## Added extra data on line of input file - student estimated grade
            //    Will read in, then also print difference from actual with message
            //    Use formatted output to print the floating point values            
            
            try
            {
                estGrade = userIn.nextDouble();  // reading estimated grade
            }
            catch (InputMismatchException imme) // input isn't a double
            { 
                estGrade = 0;
            }
            catch (NoSuchElementException nsee) // no input left to read
            {
                estGrade = 0;
            }
            
            if ((courseGrade > estGrade) && (estGrade != 0))
            {
                System.out.println("Whoo-hoo! You did better than you expected! ");
            }
            else if (courseGrade == estGrade)
            {
                System.out.println("You estimated your grade perfectly!");
            }
            else if ((courseGrade < estGrade) && (estGrade != 0))
            {
                System.out.println("Uh-oh.  You did not do as well as you expected.");
            }
            else if (estGrade == 0)
            {
                System.out.println("No estimated grade was found\n\n");
            }
            
            if (estGrade != 0)
                System.out.printf("Estimate: %6.2f\tActual: %6.2f\n\n\n",estGrade, courseGrade);            
            

        }  // end of while loop to read from file
        
        //System.out.println("Grades were calculated for "+studentCount+" students.");
        System.out.printf("Grades were calculated for %3d students.\n",studentCount);
        System.out.printf("%20s%6.2f\n","Class average: ",(avg/studentCount));
        System.out.printf("%20s%6.2f\n","Maximum grade: ",max);
        System.out.printf("%20s%6.2f\n","Minimum grade: ",min);
        System.out.println("");
        // tiny table
        System.out.printf("%-8s%10s%10s\n","Class","Maximum","Minimum");
        System.out.printf("%-8s%10s%10s\n","Average","Grade","Grade");
        System.out.printf("%-8.2f%10.2f%10.2f\n",avg, max, min);
    }
    public static double checkTestGrade(double test, int num, double max, double min)
    {
        if (test > max)
        {
            System.out.println("-- Test "+num+" value out of range high. Setting grade to "+max);
            test = max;
        } 
        if  (test < min)
        {
            System.out.println("-- Test "+num+" value out of range low. Setting grade to "+min);
            test = min;
        }
        return test;
    }
    public static double checkGrade(double test, String element, int num, double max, double min)
    {
        if (test > max)
        {
            System.out.println("-- "+element+" "+num+" value out of range high. Setting grade to "+max);
            test = max;
        } 
        if  (test < min)
        {
            System.out.println("-- "+element+" "+num+" value out of range low. Setting grade to "+min);
            test = min;
        }
        return test;
    }    
}