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

#define FILENAME "loginDetails.txt"
char buffer[255];

/* Create Account*/
typedef struct{
    char *firstname;
    char *lastname;
    char *address;
    int mobileNum;
    int dateOfBirth[3];
    int accountNum;
} userAccount;


/* Login Account */
typedef struct{
    char *userName;
    char *password;
} Login;


int mainMenu(void);
bool login(void);
void createAccount(void);
void changeUserDets(userAccount *userDetails);
float deposit(int balance);
float withdraw(int balance);
void viewCustomerBankInfo(userAccount *account);
int editCustomerBankInfo(userAccount *customDetails);
int delCustomerBankInfo(userAccount *customDetails);


int main(void){

    int choice;
    bool checkLoggedin;

    printf("---Bᴀɴᴋ Mᴀɴᴀɢᴇᴍᴇɴᴛ Sʏsᴛᴇᴍ---\n");


    choice = mainMenu();
    do{
         switch(choice){
            case 1:
                checkLoggedin = login();
                if(checkLoggedin == true){
                    choice = mainMenu();
                    break;
                }else{ printf("Incorrect Username/Password!\n"); }
                break;
            case 2:
                createAccount();
                choice = mainMenu();
                break;
            default:
                exit(0);
                break;
        }
    }while(choice != 3);

    return 0;
}

int mainMenu(){

    char userChoice[10];

    printf("1 - Login\n");
    printf("2 - Create Account\n");
    printf("3 - Exit\n");
    printf("Enter a option\n");

    fgets(userChoice, 10,  stdin);
    int choice = atoi(userChoice);

    if(choice == 1){ return choice; }
    else if(choice == 2){ return choice;}
    else{ choice;}

}

//Get the login details and store in a file.
bool login(){


    FILE *loginDetails;
    char userNameFile[100];
    char passwordFile[100];

    loginDetails = fopen("loginDetails.txt", "r");

    if(!loginDetails){
        perror(FILENAME);
        return EXIT_FAILURE;
    }

    Login *loginAccount = malloc(sizeof(*loginAccount));
    loginAccount->userName = malloc(sizeof(*loginAccount->userName));
    loginAccount->password = malloc(sizeof(*loginAccount->password));

    printf("Enter in UserName: ");
    fgets(buffer, sizeof(buffer), stdin);
    sscanf(buffer, "%s", loginAccount->userName);

    printf("Enter in PassWord: ");
    fgets(buffer, sizeof(buffer), stdin);
    sscanf(buffer, "%s", loginAccount->password);

    //Check to see if the credntials are correct.
    while(!feof(loginDetails)){
        fscanf(loginDetails, "%s %s",userNameFile, passwordFile);
        if((strcmp(userNameFile, loginAccount->userName)) == 0 && (strcmp(passwordFile, loginAccount->password)) == 0){
            printf("Thanks For Banking with Us!\n");
            return true;
            break;
        }

    }

    free(loginAccount);
    free(loginAccount->userName);
    free(loginAccount->password);

    return false;
}




//User account creation stored on a file.
void createAccount(){

    //Opening file for writing.
    FILE *createDetails;
    createDetails = fopen("createDetails.txt", "w");

    //Check if fopen() failed.
    if(!createDetails){
        perror("createDetails.txt");
        return;
    }

    userAccount *createUser = malloc(sizeof(*createUser));
    Login *loginDetails = malloc(sizeof(*loginDetails));

    printf("--Account Details--\n");

    printf("Enter in FirstName: ");
    createUser->firstname = malloc(sizeof(*createUser->firstname));
    fgets(buffer, sizeof(buffer), stdin);
    sscanf(buffer, "%s", createUser->firstname);

    printf("Enter in LastName: ");
    createUser->lastname = malloc(sizeof(*createUser->lastname));
    fgets(buffer ,sizeof(buffer), stdin);
    sscanf(buffer, "%s", createUser->lastname);

    //Add firstname and lastname to file.
    fprintf(createDetails, "%s %s", createUser->firstname, createUser->lastname);
    fflush(createDetails);
    free(createUser->firstname);
    free(createUser->lastname);

    printf("Enter in Address: ");
    createUser->address = malloc(sizeof(*createUser->address));
    fgets(buffer, sizeof(buffer), stdin);
    sscanf(buffer, "%s", createUser->address);

    printf("Enter in Mobile Number: ");
    createUser->mobileNum = malloc(sizeof(*createUser->mobileNum));
    fgets(buffer, sizeof(buffer), stdin);
    sscanf(buffer, "%s", createUser->mobileNum);

    //Add the address and mobile number
    fprintf(createDetails, "%s %d", createUser->address, createUser->mobileNum);
    fflush(createDetails);
    free(createUser->address);
    free(createUser->mobileNum);


    //Add the date of birth and account number.
    printf("Enter Date Of Birth: ");
    createUser->dateOfBirth = malloc(sizeof(*createUser->dateOfBirth));


    return;
}