// Program to test solutions to problem #9 on the cse143 final, winter 2016.
// Fill in your solution to removeFirstOf3, then compile and run the program.

import java.util.*;

class LinkedIntList {
    public LinkedIntList removeFirstOf3() {
        // fill in your solution here
    }

    private ListNode front;  // first value in the list

    // this is the sample solution
    public LinkedIntList removeFirstOf32() {
        LinkedIntList other = new LinkedIntList();
        if (front != null) {
            other.front = front;
            ListNode back1 = other.front;
            front = front.next;
            ListNode current = front;
            while (current != null && current.next != null &&
                   current.next.next != null) {
                current = current.next;
                back1.next = current.next;
                back1 = back1.next;
                current.next = current.next.next;
                current = current.next;
            }
            back1.next = null;
        }
        return other;
    }

    // post: constructs an empty list
    public LinkedIntList() {
        front = null;
    }

    public boolean equals(Object o) {
        LinkedIntList other;
        try {
            other = (LinkedIntList) o;
        } catch (Exception e) {
            return false;
        }
        if (other == null) {
            return false;
        }
        ListNode current1 = front;
        ListNode current2 = other.front;
        while (current1 != null && current2 != null) {
            if (current1.data != current2.data)
                return false;
            current1 = current1.next;
            current2 = current2.next;
        }
        return current1 == null && current2 == null;
    }
        
    // post: creates a comma-separated, bracketed version of the list
    public String toString() {
        if (front == null)
            return "[]";
        else {
            String result = "[" + front.data;
            ListNode current = front.next;
            while (current != null) {
                result += ", " + current.data;
                current = current.next;
            }
            result += "]";
            return result;
        }
    }

    // post: creates a comma-separated, bracketed version of the list
    public String toString(int number) {
        if (front == null)
            return "[]";
        else {
            String result = "[" + front.data;
            int count = 1;
            ListNode current = front.next;
            while (current != null && count < number) {
                result += ", " + current.data;
                current = current.next;
                count++;
            }
            if (current != null) {
                result += "...";
            }
            result += "]";
            return result;
        }
    }

    // post: appends the given value to the end of the list
    public void add(int value) {
        if (front == null)
            front = new ListNode(value);
        else {
            ListNode current = front;
            while (current.next != null)
                current = current.next;
            current.next = new ListNode(value);
        }
    }
}

public class FinalTest9 {
    private static int count = 0;  // test counter for arrays
    private static int totalFail = 0;
    private static int totalInfi = 0;

    @SuppressWarnings("deprecation")
    public static void main(String[] args) {
        for (int i = 0; i <= 25; i++) {
            Runner run = new Runner(i);
            run.start();
            long slept = 0;
            try {
                while(slept < 500 && !run.isFinished()) {
                    Thread.sleep(100);
                    slept += 100;
                }
            } catch (InterruptedException e) {
                System.out.println("something went wrong with thread sleep");
            }
            if(!run.isFinished()) {
                run.interrupt();
                run.stop();
                System.out.println("timeout...failed");
                System.out.println();
                count++;
                totalFail++;
            }
        }
        double sum = 0;

        if (totalFail > 0) {
            System.out.println("failed " + totalFail + " of " + count + 
                               " tests");
        } else {
            System.out.println("passed all " + count + " tests");
        }
    }
    
    private static class Runner extends Thread {
        private int number;
        private boolean finished;
        
        public Runner(int number) {
            this.number = number;
            this.finished = false;
        }

        public void run() {
            int length = number;
            // list1/list2 for testing sample, list3/list4 for their code
            LinkedIntList list1 = new LinkedIntList();
            LinkedIntList list2 = null;
            LinkedIntList list3 = new LinkedIntList();
            LinkedIntList list4 = null;
            for (int i = 0; i < length; i++) {
                list1.add(i);
                list3.add(i);
            }
            boolean fail = false;
            System.out.println("initial list1  = " + list1);
            list2 = list1.removeFirstOf32();
            System.out.println("expected list1 = " + list1);
            System.out.println("expected list2 = " + list2);
            try {
                list4 = list3.removeFirstOf3();
            } catch (RuntimeException e) {
                if(e.getStackTrace().length > 0) {
                    int line = e.getStackTrace()[0].getLineNumber();
                    System.out.println("    threw " + e + " at line #" + line);
                }
                fail = true;
            }
            if (!fail) {
                if (list1.equals(list3)) {
                    System.out.println("your list1 matches");
                } else {
                    System.out.println("your list1     = " +
                                       list3.toString(length));
                    fail = true;
                }
                if (list2.equals(list4)) {
                    System.out.println("your list2 matches");
                } else {
                    if (list4 == null) {
                        System.out.println("your list2     = null");
                    } else {
                        System.out.println("your list2     = " +
                                           list4.toString(length));
                    }
                    fail = true;
                }
            }
            if (fail) {
                System.out.println("failed");
                totalFail++;
            } else {
                System.out.println("passed");
            }
            System.out.println();
            count++;  // increment test counter
            finished = true;
        }
            
        public boolean isFinished() {
            return finished;
        }
    }
}

class ListNode {
    public final int data;       // data stored in this node
    public ListNode next;  // link to next node in the list

    // post: constructs a node with data 0 and null link
    public ListNode() {
        this(0, null);
    }

    // post: constructs a node with given data and null link
    public ListNode(int data) {
        this(data, null);
    }

    // post: constructs a node with given data and given link
    public ListNode(int data, ListNode next) {
        this.data = data;
        this.next = next;
    }
}