/*Group 2 Program 1
Paul Macclean
Mike Gorse
Robert Breckenridge

CSC 460
Language Translations

Program Description:

*/

#include <stdio.h>


typedef enum {false,true} logical;


char INFILE_EXTENSION[] = ".in";


void appendExtension(char *FileName,char *DesiredExtension) {
    //Get a pointer to extension (Last occurence of '.')
    char* filename_extension = strrchr(FileName, '.');

    //If no extension, OR if extension is **NOT** the expected infile extension:
    if (filename_extension == NULL) {
        //Append extension
        strcat(FileName, INFILE_EXTENSION);
    }
}

int getInfile(FILE **InFile, char *FileName, logical PromptFile) {
    logical fileexists  = false;
    logical quit        = false;

    do {
        if (PromptFile) {
            printf("Please enter an input file: ");
            scanf_s("%s", FileName, 100);
        }

        //if input is 'q'
        if (tolower(FileName[0]) == 'q')
            quit = true;
        else {
            appendExtension(FileName, INFILE_EXTENSION);

            //Open the file
            fopen_s(InFile, FileName, "r");

            if (*InFile == NULL) {
                printf("That file does not exist!");
                fileexists = false;
                PromptFile = true;
            }
            else {
                fileexists = true;
            }

        }
    } while (fileexists == false && quit == false);

    return quit; //indicate whether the user quit or not
}

int getOutfile(FILE** OutFile, char* FileName, logical PromptFile) {
    logical fileexists = false;
    logical quit = false;

    do {
        if (PromptFile) {
            printf("Please enter an output file: ");
            scanf_s("%s", FileName, 100);
        }

        //if input is 'q'
        if (tolower(FileName[0]) == 'q')
            quit = true;
        else {
            appendExtension(FileName, INFILE_EXTENSION);

            //Open the file
            fopen_s(OutFile, FileName, "r");

            if (*OutFile == NULL) {
                printf("That file does not exist!");
                fileexists = false;
                PromptFile = true;
            }
            else {
                fileexists = true;
            }
        }
    } while (fileexists == false && quit == false);

    return quit; //indicate whether the user quit or not
}




int main(int argc, char *argv[]) {
    logical promptinfile = true;
    logical promptoutfile = true;

    FILE *infile = NULL;
    char inputname[100]    = { 0 };
    char outputname[100]   = { 0 };


    if (argc > 1) {
        promptinfile = false;
        strcpy(inputname, argv[1]);
    }

    if (argc > 2) {
        promptoutfile = false;
        strcpy(outputname, argv[2]);
    }


    logical userquit = getInfile(&infile, inputname, promptinfile);

    if (userquit == true) {
        printf("Coward.\n");
    }
    else {
        //get output file thingo

        //int userquit = getOutfile(&infile, inputname, promptinfile, "Please enter an input file: ");
    }


    if (infile != NULL) {
        fclose(infile);
    }

    return 0;
}