#include <iostream>
#include <fstream>
#include <windows.h>
#include <conio.h>
using namespace std;

struct pinfo {
int pstock; float pcost; string psku, pname;
};

//Creation of the arrays, split into 2 in order to allow for both strings and number values to be set in the "same" place.
const int maxproduct = 9;
const int provals = 2;
string protxt [maxproduct] [provals];
float prono [maxproduct] [provals];

//Prototypes declared here.
int IMSCONSOLE(), IMSADD(), IMSREM(), IMSVIEW(), IMSWRITE(), login();

int main()
{
cout << "IIIIIIIIIIMMMMMMMM               MMMMMMMM   SSSSSSSSSSSSSSS \n";Sleep(100);
cout << "I::::::::IM:::::::M             M:::::::M SS:::::::::::::::S\n";Sleep(100);
cout << "I::::::::IM::::::::M           M::::::::MS:::::SSSSSS::::::S\n";Sleep(100);
cout << "II::::::IIM:::::::::M         M:::::::::MS:::::S     SSSSSSS\n";Sleep(100);
cout << "  I::::I  M::::::::::M       M::::::::::MS:::::S            \n";Sleep(100);
cout << "  I::::I  M:::::::::::M     M:::::::::::MS:::::S            \n";Sleep(100);
cout << "  I::::I  M:::::::M::::M   M::::M:::::::M S::::SSSS         \n";Sleep(100);
cout << "  I::::I  M::::::M M::::M M::::M M::::::M  SS::::::SSSSS    \n";Sleep(100);
cout << "  I::::I  M::::::M  M::::M::::M  M::::::M    SSS::::::::SS  \n";Sleep(100);
cout << "  I::::I  M::::::M   M:::::::M   M::::::M       SSSSSS::::S \n";Sleep(100);
cout << "  I::::I  M::::::M    M:::::M    M::::::M            S:::::S\n";Sleep(100);
cout << "  I::::I  M::::::M     MMMMM     M::::::M            S:::::S\n";Sleep(100);
cout << "II::::::IIM::::::M               M::::::MSSSSSSS     S:::::S\n";Sleep(100);
cout << "I::::::::IM::::::M               M::::::MS::::::SSSSSS:::::S\n";Sleep(100);
cout << "I::::::::IM::::::M               M::::::MS:::::::::::::::SS \n";Sleep(100);
cout << "IIIIIIIIIIMMMMMMMM               MMMMMMMM SSSSSSSSSSSSSSS  \n";Sleep(100);
cout<< "\n   Welcome to the Inventory Management System.";
login();
}

int login()
{
    //Yes, storing login details in plaintext is a no-no. However, I don't think it matters here.
    string validusers ="admin";
    string validpass = "ILOVETHEROCK!";
    string userentry;
    string passentry;
    cout<<"\n\nPlease enter your username:";
    cin>>userentry;
    cout<<"\nPlease enter your password:";
    cin>>passentry;

    //If both are correct, go to console. anything else retry.


    if ((userentry == validusers) && (passentry == validpass)){
            cout<<"Welcome back! Press any key to continue. \n\n";
            getch();
            system("CLS");
            IMSCONSOLE();
    }
    else{
        cout<<"Sorry, either your username or password was incorrect. Please try again.";
        Sleep(2000);
        system("CLS");
        main();
    }
    return 0;
}



int IMSVIEW()
{
    //Pretty self-explanatory, uses for loop to spit out based on the size of the array.
    // Technically, maxproduct could have been declared by the user and probably should be in a practical inventory manager, but for simplicity it was not.
    cout<<"This is our current inventory:\n";
    cout<<"Product Names | Product SKU | Product Stock | Product Cost\n\n";
    for (int i=0; i<maxproduct; ++i)
    {
    cout<<i+1<<":"<<protxt [i] [0] << "|"<<protxt [i] [1] << "|"<<prono [i] [0] << "|"<<prono [i] [1]<<endl;
    }
    cout<<"\n Press any key to continue.";
    getch();
    return IMSCONSOLE();
}

int IMSADD()
{

    int rowchoice=0;
    cout<<"Which line would you like to write over? Type '0' to exit back to the console. \n (Warning: If you choose a line with data existing, it will be overwritten!) \n";
    cin>>rowchoice;
    if (rowchoice == 0)
    {
        return IMSCONSOLE();
    }
    else
    {
        //The line rowchoice = rowchoice-1 converts the plain text 1-10 rows into how the computer reads them as 0-9. Easier for non-computer savvy users.
        //struct used here to fill array.
        pinfo newproduct;
        rowchoice = rowchoice -1;
        cout<<"\n\nEnter the Product Name: ";
        cin>>newproduct.pname;
        cout<<"\n\n Enter the Product SKU tag: ";
        cin>>newproduct.psku;
        cout<<"\n\n Enter the Product Stock: ";
        cin>>newproduct.pstock;
        cout<<"\n\n Enter the Product Cost in USD: ";
        cin>>newproduct.pcost;

        cout<<"\n\n This is what was entered:";
        cout<<endl<<"Name: "<<newproduct.pname<<endl<<"SKU: "<<newproduct.psku<<endl<<newproduct.pstock<<" In Stock"<<endl<<"Cost: $"<<newproduct.pcost<<"\n\n";
        protxt [rowchoice] [0] = newproduct.pname;
        protxt [rowchoice] [1] = newproduct.psku;
        prono [rowchoice] [0] = newproduct.pstock;
        prono [rowchoice] [1] = newproduct.pcost;
        cout<<"\n Press any key to continue.";
        getch();
        return IMSCONSOLE();
    }
}
int IMSREM()
{
    //Same mechanism as IMSADD for rows.

    int rowchoice=0;
    cout<<"Which line would you like to delete over? Type '0' to exit back to the console. \n (Warning: If you choose a line with data existing, it will be overwritten!) \n";
    cin>>rowchoice;

    if (rowchoice == 0)
    {
       return IMSCONSOLE();
    }

    //If you choose a row that doesn't exist, you delete nothing.

    else
    {
        rowchoice = rowchoice -1;
        int dblcheck;

    //In case you accidentally choose the wrong row.
        cout<<"Are you sure? Doing this will permanently delete the values set for that product.\n\n 1. Yes \n 2. No\n   ";
        cin>> dblcheck;
        if (dblcheck == 1)
        {
            //Sets all values to zero or empty.

            protxt [rowchoice] [0] = "";
            protxt [rowchoice] [1] = "";
            prono [rowchoice] [0] = 0;
            prono [rowchoice] [1] = 0;
            cout<<"\n    Done! Press any key to continue.";
            getch();
            return IMSCONSOLE();
        }
        if (dblcheck == 0)
        {
            return IMSCONSOLE();
        }

        //Bug catcher
        else{
            cout<<"Invalid Entry.";
            return IMSREM();
        }
    }

 }
//The 'Not learned in class' portion is here.
int IMSWRITE()
{
   ofstream myfile;

   //Creates new text file
  myfile.open ("savedata.txt");

  //Output for loop spits into the new text file
 for (int i=0; i<maxproduct; ++i)
    {
    myfile<<i+1<<":"<<protxt [i] [0] << "|"<<protxt [i] [1] << "|"<<prono [i] [0] << "|"<<prono [i] [1]<<endl;
    }
  myfile.close();

  // Closed the file. Time to leave.
  cout<<"\n\n Saved! Check 'savedata.txt'";
  Sleep(2000);
  system("CLS");
  return IMSCONSOLE();
}

//Start of the function tree. All roads lead to IMSCONSOLE()
int IMSCONSOLE()
{
int menuchoice;
do {
    cout << "\n\n What would you like to do? Type in the desired number to choose. \n\n 1. View Products \n 2. Add a Product \n 3. Delete a Product \n 4. Save to File \n 5. Exit \n\n" << endl;
 cin >>menuchoice;

 //Bad Input Catcher
 if ((menuchoice >5) && (menuchoice <1)) {
    cout <<"That choice is not a valid option. Please choose one of the options above.";
    Sleep(2500);
    system("CLS");
    return IMSCONSOLE();
 }

 //The Normal stuff, sends to individual defined functions in each case spare 5.

 switch (menuchoice)
 {
 case 1:
    IMSVIEW();
    break;


 case 2:
    IMSADD();
    break;

 case 3:
    IMSREM();
    break;

 case 4:
    IMSWRITE();
    break;

 case 5:
cout<<"\n Thank you for using the IMS system. Goodbye!";
Sleep(1000);
return 0;
}
} while (menuchoice != 5);
return 0;
}