#include "StudentFunction.h"

void CreateUser(struct User* userData, int numberOfUsers)
{

    printf("Choose your username ( max 64 characters and no space ): ");
    scanf("%s", userData->username);

    printf("Choose your password ( max 64 characters and no space ): ");
    scanf("%s", userData->password);

    printf("Your username is: %s \nYour password is: %s ", userData->username, userData->password);

    srand((unsigned)time(NULL));
    srand((unsigned)time(NULL));

    for (int j = 0; j < numberOfUsers; j++)
    {
        int keyLo = rand() % 6 + 3;

        for (int i = 0; i < keyLo; i++)
        {
            userData[j].key[i] = rand() % 94 + 33;
        }
        userData[j].key[keyLo] = '\0';
    }



}

void encryped(char text[], char encryptdText[], char key[])
{
    int i = 0;
    int j = 0;
    int lengthOfText = strlen(text);

        while (i < lengthOfText)
        {
            if (j == strlen(key))
            {
                j = 0;
            }
            if (text[i] <= 32 || text[i] >= 126 || text[i] =='n'|| text[i] == '\0')
            {
                encryptdText[i] = text[i];
            }
            else
            {
                encryptdText[i] = (text[i] - 32 + key[j] - 32) % 95 + 32;
                j++;
            }
            i++;
        }
}

int LogIn(struct User* userData, int numberOfUsers)
{
    char username[64];
    char password[64];
    int a = 1;
    int check = 0;
    int position;

    for (int i = 0; i < numberOfUsers; i++)
    {
        printf("%s\t%s\n", userData[i].username, userData[i].password);
    }

    while (a == 1)
    {

        printf("Enter your Username: \n");
        scanf("%s", &username);
        getchar();
        printf("Enter your Password: \n");
        scanf("%s", &password);
        getchar();
        for (int i = 0; i < numberOfUsers; i++)
        {
            if ((strcmp(username, userData[i].username) != 0) || strcmp(password, userData[i].password) != 0)
            {
            }
        else
        {
            check = 1; // checkar om dom är lika varanda
            position = i; //vilken postion användaren är på
            i = numberOfUsers;
            a = 0;
            printf("Login correct!");
        }

        }

    }
    return position;
}

void StartMenu()
{
    printf("\n     MENU      \n");
    printf("----------------\n");

    printf("1. Log In. \n");
    printf("2. Create user.\n");
    printf("3. Quit program. \n");
}
void MainMenu(struct User* userData, int userID, int numberOfUsers)
{

    int choice = 1;
    char textIn[1000];
    char newfilename[1000];
    FILE* pFileText;
    pFileText = fopen("text.txt", "a+");
    struct User pUser;
    char fileSaveChoice;
    char fileConext[1000]; //BYTTTTTNAMNNNN!!!
    char newPass[64];
    char encryptdText[1000];

    while (choice != -1)
    {
    /*char fileChoice;*/
    char fileChoice[1000];

    printf("\n\n_______|MENU|__________\n");
    printf("\n");

    printf("1. Input your text \n");
    printf("2. Save your text to a new file \n");
    printf("3. Save your text in an already existing file \n");
    printf("4. Choose a file to read and present it's content (uncrypted) \n");
    printf("5. Change your password\n");
    printf("6. log out \n");
    printf("7. exit program \n");


        scanf("%d", &choice);
        getchar();

        switch (choice)
        {


        case 1:

            printf("Write your text: ");
            fgets(textIn, 1000, stdin);
            printf("%s", textIn);


            printf("do you want to save your text in the existing document? (y/n)?:  ");
            scanf("%c", &fileSaveChoice);


            if (fileSaveChoice == 'y')
            {
            fputs(textIn, pFileText);
            fclose(pFileText);

            }
            else
            {
                printf("\nPlease chose a new option\n");
                choice = 0;
            }
            break;

        case 2:
            printf("\n%s\n", textIn); //remove!!!//

            printf("chose a new name for the file");
            scanf("%s", newfilename);

            FILE *pNewFile;
            pNewFile = fopen(newfilename, "w");
            encryped(textIn, encryptdText, userData->key);

            fputs(textIn, pNewFile);
            fclose(pNewFile);

            break;

        case 3:
            printf("save your text to an already existing file \n");
            printf("chose an existing file: ");
            scanf("%s", pUser.fileName);
            getchar();

            FILE * pExistingfile;
            pExistingfile = fopen(pUser.fileName, "a+");

            fputs(textIn, pExistingfile);
            fclose(pExistingfile);
            break;

        case 4:
            printf("what file would you like to choose?: ");
            scanf("%s", fileChoice);

            FILE * fileChoicePointer;
            fileChoicePointer = fopen(fileChoice, "r");

            while (fgets(fileConext, sizeof(fileConext), fileChoicePointer) != NULL)
            {
                printf("\n");
                fputs(fileConext, stdout);
            }
            fclose(fileChoicePointer);
            break;

        case 5:
            printf("Write your new password: ");
            scanf("%s", newPass);

            strcpy(userData[userID].password, newPass);

            printf("%s", userData[userID].password);

            FILE* outFile;
            outFile = fopen("User.txt", "r+");
            fseek(outFile, 3, SEEK_SET);
            for (int i = 0; i < numberOfUsers; i++)
            {
                fprintf(outFile, "%s\t%s\n", userData[i].username, userData[i].password);
            }
            fclose(outFile);

            break;

        case 6:
            printf("\nlogging out\n");
            StartMenu();
            choice = -1;
            break;
        case 7:
            printf("exit");
            exit(1);
            break;
        default:
            break;
        }

    }
}