/*
 * CSE 373, Project #3
 * Autumn 2001
 *
 * Name: ???
 * Date: ???
 *
 * main.cpp
 *
 * The driver program of a spreadsheet application.
 *
 */

#include <fstream.h>
#include "mystring.h"
#include "util.h"


/* You will need to define a Spreadsheet class
 * in spreadsheet.h and spreadsheet.cpp that has
 * at least the following functions.
 */

class Spreadsheet {
public:
    void printValues() {};
    void printFormulas() {};
    void changeCellFormula(CellToken cellID) {};
    void read(ifstream infile) {};
    void save(ofstream outfile) {};
};


void MenuPrintValues(Spreadsheet & s)
{
    s.printValues();
}

void MenuPrintFormulas(Spreadsheet & s)
{
    s.printFormulas();
}

void MenuChangeCellFormula(Spreadsheet & s)
{
    CellToken cellID;
    Stack<ExpressionTreeToken> expTreeTokenStack;
    ExpressionTreeToken expTreeToken;

    cout << "Enter the cell to change: ";
    getcellToken (cin, cellID);

    cout << "column: " << cellID.column << endl;
    cout << "row   : " << cellID.row << endl;

    // error check to make sure the row and column
    // are within spreadsheet array bounds.

    cout << "Enter the cell's new formula: ";
    getformula (cin, expTreeTokenStack);

    // This code prints out the expression stack from
    // top to bottom (that is, reverse of postfix).
    while (!expTreeTokenStack.isEmpty())
    {
        expTreeToken = expTreeTokenStack.topAndPop();
        printExpressionTreeToken(expTreeToken);
    }

    s.changeCellFormula(cellID);
}

void MenuReadSpreadsheet(Spreadsheet & s)
{
    string filename;
    ifstream infile_stream;

    // Get the input file name from the user
    cout << "Enter a file name to read from: ";
    getword (cin, filename);
    infile_stream.open(filename.c_str(), ios::nocreate);
    if (!infile_stream)
    {
      cout << "Error: Could not open " << filename << "." << endl;
      return;
    }

    cout << "Reading " << filename << " ... ";
    s.read(infile_stream);
    cout << "Done." << endl;
}

void MenuSaveSpreadsheet(Spreadsheet & s)
{
    string filename;
    ofstream outfile_stream;

    // Get the output file name from the user
    cout << "Enter a file name to save to: ";
    getword (cin, filename);
    outfile_stream.open(filename.c_str());
    if (!outfile_stream)
    {
      cout << "Error: Could not open " << filename << "." << endl;
      return;
    }

    cout << "Writing " << filename << " ... ";
    s.save(outfile_stream);
    cout << "Done." << endl;
}


int main()
{
    Spreadsheet s;
    bool done = false;
    string command;

    cout << ">>> Welcome to the CSE 373 Spreadsheet <<<" << endl << endl;
    while (!done)
    {
        cout << "Choose from the following commands:" << endl;
        cout << endl;
        cout << "p: print out the values in the spreadsheet" << endl;
        cout << "f: print out the formulas in the spreadsheet" << endl;
        cout << "c: change the formula of a cell" << endl;
        cout << "r: read in a spreadsheet from a textfile" << endl;
        // BONUS:
//        cout << "s: save the spreadsheet to a textfile" << endl;
        cout << endl;
        cout << "q: quit" << endl;

        cout << endl;
        cout << "Enter your command: ";
        getword (cin, command);

        // We care only about the first character of the string
        switch (command[0])
        {
        case 'p':
            MenuPrintValues(s);
            break;

        case 'f':
            MenuPrintFormulas(s);
            break;

        case 'c':
            MenuChangeCellFormula(s);
            break;

        case 'r':
            MenuReadSpreadsheet(s);
            break;

            /* BONUS:
        case 's':
            MenuSaveSpreadsheet(s);
            break;
            */

        case 'q':
            done = true;
            break;

        default:
            cout << command[0] << ": Bad command." << endl;
            break;
        }
        cout << endl;

    }

    cout << "Thank you for using our spreadsheet." <<endl;
    return 0;
}