#include <iostream>
using namespace std;
/*
Elizabeth Smith
Name Length? -Yes - No more than 100
- Type? - Yes - Only letters
-Range? - No
-Format? - No
Age - Length? - No
- Type? - Yes - Int
-Range? - Yes - 1 to 126
-Format? - No
Phone number - Length? - Yes - Depending on format, needs 10 or 11 digits
- Type? - No
-Range? - No
-Format? - Yes - Mix of digits and certain characters
*/
bool checkName(char name[], int length);
bool checkNum(char num[], int length);
bool checkAge(int age);
int findLen(char n[]);
int main()
{
    //Variables
    char name[100] = "abc";
    char phoneNumber[15] = "1 208 885 0000";
    int age = 0;
    bool nameCheck = true;
    bool numCheck = true;
    bool ageCheck = true;
    //Get Name
    cout << "Enter Your Name: ";
    fgets(name, sizeof(name), stdin);
    int lengthN = findLen(name);
    //If name is too long, ignores first 100 characters.
    //If not too long, adds replaces newline with NULL
    if (lengthN > 0 && name[lengthN - 1] == '\n') {
        name[lengthN - 1] = '\0';
        --lengthN;
    }
    else {
        cin.ignore(100, '\n');
    }
    nameCheck = checkName(name, lengthN);
    while (nameCheck == false) {
        cout << "Invalid Input. Try Again: ";
        fgets(name, sizeof(name), stdin);
        lengthN = findLen(name);
        if (lengthN > 0 && name[lengthN - 1] == '\n') {
            name[lengthN - 1] = '\0';
            --lengthN;
        }
        else {
            cin.ignore(100, '\n');
        }
        nameCheck = checkName(name, lengthN);
    }

    //GET AGE
    cout << "Enter Age: ";
    cin >> age;
    ageCheck = checkAge(age);
    while (ageCheck == false)
    {
        cout << "Re-Enter a valid Age: ";
        cin >> age;
        ageCheck = checkAge(age);
    }
    cin.ignore();
    //GET NUMBER
    cout << "Enter Phone Number: ";
    fgets(phoneNumber, sizeof(phoneNumber), stdin);
    lengthN = findLen(phoneNumber);

    //If number is too long, ignores.
    //If not too long, adds replaces newline with NULL
    if (lengthN > 0 && name[lengthN - 1] == '\n') {
        name[lengthN - 1] = '\0';
        --lengthN;
    }
    else {
        cin.ignore();
    }
    numCheck = checkNum(phoneNumber, lengthN);
    while (numCheck == false) {
        cout << "Invalid Input. Try Again : ";
        fgets(phoneNumber, sizeof(phoneNumber), stdin);
        lengthN = findLen(phoneNumber);

        if (lengthN > 0 && name[lengthN - 1] == '\n') {
            name[lengthN - 1] = '\0';
            --lengthN;
        }
        else {
            cin.ignore();
        }
        numCheck = checkNum(phoneNumber, lengthN);
    }

    cout << "\nINFORMATION COLLECTED:\n";
    cout << "Name: " << name << endl;
    cout << "Age: " << age << endl;
    cout << "Phone Number: " << phoneNumber << endl;
    return 0;
}
//Returns false if not letters else true
bool checkName(char name[], int length)
{
    for (int i = 0; i < length; i++) {
        if (!isalpha(name[i])) {
            cout << "Use Letters Only: \n";
            return false;
        }
    }
    return true;
}
//Returns true if formats match else false or false if digit count is not correct
bool checkNum(char num[], int length)
{

    int digitCount = 0;
    for (int i = 0; i < length; i++) {


        if (isdigit(num[i]) || num[i] == ' ' || num[i] == '-' || num[i] == '(' || num[i]
            == ')' || num[0] == '+' || num[i] == '\n' || num[i] == '\0') {
            if (isdigit(num[i]))
            {
                digitCount++;
            }
        }
        else
        {
            cout << "Invalid Character: \n";
            return false;
        }

    }
    //+12088850000
    if (num[0] == '+' && digitCount == 11) {

        return true;
    }
    //1 208 885 0000
    if (isspace(num[1]) && isspace(num[5]) && isspace(num[9]) &&
        (digitCount == 11 || digitCount == 10)) {
        return true;
    }
    //208-885-0000
    if (num[3] == '-' && num[7] == '-' && (digitCount == 11 || digitCount ==
        10))
    {
        return true;
    }
    //(208)8850000
    if (num[0] == '(' && num[4] == ')' && (digitCount == 11 || digitCount ==
        10))
    {
        return true;
    }
    if (digitCount == 10 || digitCount == 11) {
        return true;
    }
    if (digitCount != 10 && digitCount != 11) {
        cout << "Invalid Number of Digits\n";
        return false;
    }
    return false;
}
//Returns false if range fails or not number else true
bool checkAge(int age)
{
    if (age > 126 || age < 0)
    {
        cout << "Invalid Age Range.\n";
        return false;
    }
    //If the input is not a number
    if (cin.fail())
    {
        cin.clear(); // Clear the error flag
        //cin.ignore(numeric_limits<streamsize>::max(), '\n'); // Discard invalid input
        cout << "Invalid input. Please enter a number for age.\n";
        return false;
    }
    return true;
}
int findLen(char n[]) {
    int count = 0;
    for (int i = 0; n[i] != '\0'; i++) {
        ++count;
    }
    return count;
}