// FileStatistics.java - Extended version of file object
// Author: Chris Wilcox (original Kushagra Tiwary)
// Date:   11/15/2016
// Class:  CS163/CS164
// Email:  wilcox@cs.colostate.edu

import java.io.File;
import java.util.ArrayList;

public class FileStatistics {

    // Instance (non-static) variables
    // Attributes of an individual file
    public String fileName;
    public File fileObject;
    public ArrayList<String> lines;
    public ArrayList<String> words;
    public int numberLines = 0;
    public int numberWords = 0;

    // Class (static) variables
    // Array list of file objects
    public static ArrayList<FileStatistics> files = new ArrayList<>();
    
    // Constructor
    public FileStatistics(String filePath){

        // STUDENT CODE HERE
        // Initialize instance variables for file name and file object
        fileName = 
        fileObject = 
        
        // STUDENT CODE HERE
        // Call utility methods to read file
        lines = 
        words = 
        
        // STUDENT CODE HERE
        // Determine number and lines and words from array lists
        numberLines = 
        numberWords = 
        
        // STUDENT CODE HERE
        // Add newest object (this) to array list
    }
    
    public String toString() {
        String s;
        s  = fileName + "\n";
        s += "Lines: " + numberLines + "\n";
        s += "Words: " + numberWords + "\n";;
        s += "Length: " + fileObject.length() + "\n";
        s += "Path: " + fileObject.getAbsolutePath() + "\n";
        return s;
    }

    // Main entry point
    public static void main(String[] args){

        // STUDENT CODE HERE
        // Instantiate three FileStatistics objects,
        // for "BenefitsOfJava.txt", "Mars.txt", and "RobertFrost.txt"

        // Print file statistics for all files
        // NOTE: Use the 'wc' command in Linux to verify file statistics
        for (FileStatistics file: files) {
            // STUDENT CODE HERE
            // Just print the object to call the toString method
        }
        
        // Find words in all three files
        System.out.println("Words in all three files: ");
        ArrayList<String> merged = new ArrayList<String>();

        // STUDENT CODE HERE
        // Algorithm: Look through words in first file, and check if they
        // are also in second and third file. If they are in all three files,
        // add them to the merged ArrayList. You might want to consider
        // using the contains() method in ArrayList, which is part
        // of the Collections interface. Hint: You must avoid adding
        // duplicates to the merged ArrayList!
        System.out.println(merged);
        System.out.println();

        // Count letters in all files
        for (char c = 'a'; c <= 'z'; c++) {
            int freq0 = Utilities.frequency(files.get(0).lines, c);
            int freq1 = Utilities.frequency(files.get(1).lines, c);
            int freq2 = Utilities.frequency(files.get(2).lines, c);
            System.out.printf("Frequency of " + c + " for BenefitsOfJava.txt: %d, Mars.txt: %d, RobertFrost.txt: %d\n", freq0, freq1, freq2);
        }
    }
}