//CS202 Program #1 Ryan Larson
//Header file including classes
#include<iostream>
using namespace std;
#include<cstring>
using namespace std;

const int TITLE = 100;
const int BODY = 600;
const int SIZE = 20;

struct thread
{
       char * post_title;
       char * post_body;
};

struct temp_thread
{
       char title[TITLE];
       char post_body[BODY];
};

struct node
{
       thread data;
       node * next;
};

class forum
{
      public:
             forum();  //constructor
             ~forum(); //destructor
             int display_all(); //displays all threads
      protected:
              node *topic[SIZE];
};

class new_thread : public forum //derived class of class forum
{
 public:
            new_thread();
            int newthread(temp_thread & temp);
};

class new_post : public forum //derived class of class forum
{
      public:
             new_post();
             int search(temp_thread & temp);
};

//CS202 Program 1 Ryan Larson
//Class implementation

forum::forum()//constructor with Int argument for the size
{

        for(int i = 0; i < SIZE; ++i)
        {
                topic[i] = NULL;
    }
}
forum::~forum()
{
        node * current = NULL;
        int i = 0;
        if(topic[i])
        {
        for(i = 0; i < SIZE; ++i)
        {
        current = topic[i];
        topic[i] = topic[i]->next; //the tail is now the head
        if(topic[i])
        {
        do{
        delete [] topic[i]->data.post_body;
        delete [] topic[i]->data.post_title;
        delete topic[i];
    topic[i] = topic[i]->next;
        }while (current != topic[i]);
        }
        }
    }
}

int forum::display_all()
{
    node * current;

    for (int i = 0; i<SIZE; ++i)
    {
        current = topic[i]->next;
        while(current) //while list is not NULL
        {
         cout<<"New Thread: " <<endl <<endl;
         cout<<"Post title: " <<current->data.post_title <<endl;
         cout<<"Post body:  " <<current->data.post_body <<endl <<endl;
        }
    }
}

new_thread::new_thread()
{}

int new_thread::newthread(temp_thread & temp)
{
    int i = 0;

    if(!topic[i]){
    topic[i] = new node;
    topic[i]->data.post_title = new char[strlen(temp.title) +1];
    strcpy(topic[i]->data.post_title, temp.title);
    topic[i]->data.post_body = new char[strlen(temp.post_body) +1];
    strcpy(topic[i]->data.post_body, temp.post_body);
    topic[i]->next = topic[i];
    }
    else{

    while(topic[i])//loop to traverse and find the next NULL pointer in the array
    {
      ++i;
    }
    topic[i] = new node;
    topic[i]->data.post_title = new char[strlen(temp.title) +1];
    strcpy(topic[i]->data.post_title, temp.title);
    topic[i]->data.post_body = new char[strlen(temp.post_body) +1];
    strcpy(topic[i]->data.post_body, temp.post_body);
    topic[i]->next = topic[i];
    }
}

new_post::new_post()
{}

int new_post::search(temp_thread & temp)
{
    int i = 0;
    for(i = 0; i < SIZE; ++i)//loop to find the thread being searched for
    {
            if(strcmp(temp.title, topic[i]->next->data.post_title) == 0)
            cout<<"Post Found!" <<endl <<endl;
    }
    node * current = topic[i];
    node * temp1 = topic[i]->next;
    node * temp2 = NULL;
    do{  //loop to display all posts in a given thread
         cout<<"Post Title: " <<topic[i]->data.post_title <<endl;
         cout<<"BODY: " <<topic[i]->data.post_body <<endl <<endl;
         temp2 = topic[i];//finds the last node in the CLL
         topic[i] = topic[i]->next;
    }while(topic[i] != current);

    temp1 = NULL;
    temp1 = new node;

    cout<<"Please enter the title for your reply post: ";
 cin.get(temp1->data.post_title, 100); cin.ignore(100, '\n');
    cout<<"Please enter the body for your reply post: ";
    cin.get(temp1->data.post_body, 600); cin.ignore(100, '\n');
    temp1->next = topic[i]->next;
    topic[i]->next = temp1;
}
//CS202 Ryan Larson Program #1
//Client Program


int main()
{
    temp_thread temp_data; //object of struct temp_thread
    char decision; //character variable for the menu decision
    forum discussion; //object of the forum class
    new_thread newthread; //object of the new_thread class
    new_post newpost; //object of the new_post class
    temp_thread tempdata; //object of the temp_thread class


    cout<< "Welcome to the discussion forum" <<endl <<endl; //Welcome the user
    cout<< "What would you like to do?" <<endl <<endl;  //Menu
    cout<< "V to view all discussion threads" <<endl;
    cout<< "A to add a new discussion thread" <<endl;
    cout<< "S to search for and add to existing thread" <<endl;

    cin>> decision; cin.ignore(100, '\n'); //read in the decision
    //if conditions for menu decision
    if(decision == 'v' || decision == 'V')
    {
         discussion.display_all();
    }
    else if(decision == 'A' || decision == 'a')
    {
         cout<<"Create a new thread! " <<endl;
         cout<<"Please enter the thread title: " <<endl;
         cin.get(tempdata.title, 100); cin.ignore(100, '\n');
         cout<<"Please enter the body of the first post " <<endl;
         cin.get(tempdata.post_body, 600); cin.ignore(100, '\n');
         newthread.newthread(tempdata);
    }
    else if(decision == 'S' || decision == 's')
    {
         cout<<"Find a thread and post to it! " <<endl;
         cout<<"Please enter the TITLE of the thread you would like to find: ";
         cin.get(tempdata.title, 100); cin.ignore(100, '\n');

         newpost.search(tempdata);
    }
    else


    return 0;
}