// header files
#include "StandardConstants.h"
#include "Console_IO_Utility.h"
#include "File_Input_Utility.h"
#include "File_Output_Utility.h"
#include "Arizona_Tax_Utility.h"

// constants
    // none

// function prototypes

/*
Name: createOutputString
Process: creates string to be displayed and output to file;
         only one string can be assembled in the function
Function input/parameters:  the output string pointer, tax year and tax
Function output/parameters: the generated output string (char *)
Function output/returned: none
Function input/keyboard: none
Device output/file: none
Dependencies: sprintf
*/
void createOutputString(char *outputString, int taxYear, double totalTax);

/*
Name: outputResultsToFile
Process: opens file for output, writes string to file with endline,
         closes file
Function input/parameters: file name (const char *),
                           output string (const char *)
Function output/parameters: none
Function output/returned: none
Function input/keyboard: none
Device output/file: none
Dependencies: File Output Utility tools
*/
void outputResultsToFile(const char *outputFileName, const char *outputString);

// main program
int main()
    {
     // show title
        // Functions: printf
     printf("\nDUMMY TAX CALCULATOR V0.4\n=========================\n\n");

     // initialize variables
     char taxInformationFile[STD_STR_LEN];
     char outputString[STD_STR_LEN],  outputFileName[STD_STR_LEN];
     double taxArizona, currentIncome;
     int yearCount, currentYear;
     yearCount = 0;

     // get user input
        // Functions: promptForString
     promptForString("Enter file name containing tax information: ",
                                                            taxInformationFile);
     // conduct calculations
        // Functions: calculateArizonaTax, outputResultsToFile

     // open input file
     openInputFile(taxInformationFile);

     // use a while loop to iterate over the numbers of years, prime with
     // first year.
     currentYear = readIntegerFromFile();
     currentIncome = readDoubleFromFile();
     yearCount = yearCount + 1;
     while (!checkForEndOfInputFile()) {
       sprintf(outputFileName, "Tax_Report_%d.txt", currentYear);
       taxArizona = calculateArizonaTax(currentIncome);
       createOutputString(outputString, currentYear, taxArizona);
       outputResultsToFile(outputFileName, outputString);
       yearCount = yearCount + 1;
       currentYear = readIntegerFromFile();
       currentIncome = readDoubleFromFile();
     }

     // display results
        // Functions: sprintf, printf
     printf("\nArizona tax for %d years has been calculated.\n", yearCount - 1);
     printf("\nThe results can be viewed in the report files.\n");

     // end program, return success
     printf("\nEnd Program\n");
     return 0;
    }


// supporting functions

/*
Name: createOutputString
Process: creates string to be displayed and output to file;
         only one string can be assembled in the function
Function input/parameters:  the output string pointer, tax year and tax
Function output/parameters: the generated output string (char *)
Function output/returned: none
Function input/keyboard: none
Device output/file: none
Dependencies: sprintf
*/

void createOutputString(char *outputString, int taxYear, double totalTax)
{
    // initialize variables
      // none
    // get user input
      // input is passed into function by parameters.
    // conduct calculations
      // none
    // display results
    sprintf(outputString, "For the tax year %d total"
                             " AZ tax to be paid is $%.2f.", taxYear, totalTax);
}

/*
Name: outputResultsToFile
Process: opens file for output, writes string to file with endline,
         closes file
Function input/parameters: file name (const char *),
                           output string (const char *)
Function output/parameters: none
Function output/returned: none
Function input/keyboard: none
Device output/file: none
Dependencies: File Output Utility tools
*/

void outputResultsToFile(const char *outputFileName, const char *outputString)
{
    // initialize variables
      // none
    // get user input
      // input is passed into function by parameters.
    // conduct calculations
      // none
    // display results
      // outputs a file
    openOutputFile(outputFileName);
    writeStringToFile(outputString);
    closeOutputFile();
}