#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>



int numberOfOperators(char *input);
int numberOfOperations(char *input);
int readFromFileAndWrite(char *textfileName,char *codeFileName);
int readFromFileAndPrint(char *fileName);
int readFromKeyboardAndSaveInFile(char *filename, char *input);
int readFromeKeyboardAndOutput(char *input);


int main()
{

     int i=0;
     int n;

    printf("\nMenu with different options!\n");

        printf("\nPress 1) for reading a program from a fail and save the result in a file.\n");
        printf("\nPress 2) for reading a program from a fail and output the result on the screen.\n");
        printf("\nPress 3) for reading a program from the keyboard and output in a file entered from the user.\n");
        printf("\nPress 4) for reading a program from the keyboard and output on the screen.\n");

    scanf("%d", &n);


    while(i==0)
        {

    if(n==1)

        {
            printf("\nPress 1) for reading a program from a fail and save the result in a file.\n");

            char textFileName[50];
            char codeFileName[50];

            printf("Enter file name for txt file: ");
            scanf("%s", textFileName);

            printf("File name added \n");

            printf("Enter file name for code file: ");
            scanf("%s", codeFileName);

            printf("File name added \n");

            readFromFileAndWrite(textFileName, codeFileName);

            return;

        }

        if(n==2)
        {
            printf("\nPress 2) for reading a program from a fail and output the result on the screen.\n");

            char fileName[50];

            printf("Enter filename: ");
            scanf("%s", fileName);

            readFromFileAndPrint(fileName);

            return;

        }

      if(n==3)
      {

            printf("\nPress 3) for reading a program from the keyboard and output in a file entered from the user.\n");

            char fileName[50];
             char programInput[500];

            printf("File name: ");
            scanf("%s", fileName);

            printf("File name added \n");

            printf("Program input: ");

            scanf(" %s", programInput);
            printf("ProgramInputAdded \n");

            readFromKeyboardAndSaveInFile(fileName, programInput);

            return;

      }

       if(n==4)
       {
             printf("\nPress 4) for reading a program from the keyboard and output on the screen.\n");

              char programInput[500];

                scanf(" %s", programInput);
                readFromeKeyboardAndOutput(programInput);
       }
        else
        {
            printf("Please enter a valid option!");
            scanf("%d", &n);
        }


        }
    return 0;
}

 int numberOfOperators(char *input)   // number of operators
 {
     int operators=0;

      size_t inputlenght=strlen(input);

     while(*input<inputlenght)
     {
         if(*input == '>' || *input == '<' || *input == '==' || *input =='!=' || *input == '>=' || *input == '<=')
         {

            operators++;
         }

         input++;

     }

    return operators;
 }


 int numberOfOperations(char *input)  // Брой входно/изходни операции
 {
     int operations=0;


     size_t inputlenght=strlen(input);

     while(*input<inputlenght)
     {
         if(*input == 'printf' || *input == 'scanf' || *input =='gets' || *input=='puts' || *input=='fgets' || *input=='fputs')
         {
             operations++;
         }

        input++;
     }

     return operations;

 }

int readFromFileAndWrite(char *textfileName,char *codeFileName) // 1
{
    FILE *fp;
    FILE *newfile;

    int operators=0;
    int operations=0;



    char newFile_name[1000];

    fp=fopen(textfileName,"r");

    newfile=fopen(codeFileName, "w");

    if(fp==NULL)
    {
        perror("Invalid directory for your file!");
        return 1;
    }


    while(fgets(newFile_name, 1000, newfile) != NULL)
    {
        fputs(newFile_name, newfile);

        operators=numberOfOperators(newFile_name);
        operations=numberOfOperations(newFile_name);


    }

    printf("\nThe number of operators is %d\n", operators);
    printf("\nThe number of operations is %d\n", operations);


    return 0;

}

int readFromFileAndPrint(char *fileName) // 2
{
    FILE *fp;

    int operators=0;
    int operations=0;


    char buf[1000];

    fp=fopen(fileName, "r");

    if(fp==NULL)
    {
        perror("Invalid directory for your file!");
        return 1;
    }

    while(fgets(buf, 1000, fp) != NULL)
    {
        printf("%s", buf);

        operators = numberOfOperators(buf);

        operations=numberOfOperations(buf);



    }

     printf("\nThe number of operators is %d\n", operators);
    printf("\nThe number of operations is %d\n", operations);



    return 0;

}
int readFromKeyboardAndSaveInFile(char *filename, char *input) // 3
{
    FILE *fp;

    fp=fopen(filename, "w");

    int result=fputs(input, fp);


    fclose(fp);

    printf("The name of the file is %s", filename);

    int operators=numberOfOperators(input);

    int operations=numberOfOperations(input);

    printf("\nThe number of operators is %d\n", operators);
    printf("\nThe number of operations is %d\n", operations);

    return 0;

}
int readFromeKeyboardAndOutput(char *input) // 4
{
    printf("%s", input);

    int operators=numberOfOperators(input);
    int operations=numberOfOperations(input);

    printf("\nThe number of operators is %d\n", operators);
    printf("\nThe number of operations is %d\n", operations);

    return 0;
}