#include <fstream>
#include <iostream>
#include <cstdlib>
#include <iomanip>
#include <string>
using namespace std;

int main()
{
    ifstream input;
    ofstream output;
    string inputFileName;
    string outputFileName;
    char next;

    cout << "This program takes a file containing unformated javascript text, formats it, \n"
         << "and places it back into a new file. Make sure the source file is in the \nsame directory as the program.\n\n";

    cout << "What is the name of the source code file (max 20 characters): ";
    cin  >> inputFileName;

    input.open(inputFileName);
    if (input.fail())
    {
        input.close();
        cout << "Error: failed to open '" << inputFileName << "'.\n\n";
        cout << "Press 'return' to end the program...";
        cin.get();
        exit(1);
    }

    cout << "What is the name of the output file (max 20 characters): ";
    cin  >> outputFileName;

    output.open(outputFileName);
    if (output.fail())
    {
        cout << "Error: failed to open '" << outputFileName << "'.";
        cout << "Press 'return' to end the program...";
        cin.get();
        input.close();
        output.close();
        exit(1);
    }

    int spaceCount = 0;
    while (input >> next)
    {
        if (next == ';')
            output << next << endl << setw(spaceCount + 1);
        else if (next == '{')
        {
            output << endl << setw(spaceCount + 1) << next << endl;
            output.width(spaceCount += 4);
        }
        else if (next == '}')
        {
            output.width(spaceCount -= 4);
            output << endl << setw(spaceCount + 1) << next << endl;
        }
        else
            output << next;
    }


    return 0;
}