Account.cpp

#include "Account.h"

// Static Element
int Account::total = 0;
int Account::currentNumber = 0;
string Account::currentTenantID = "None";
int Account::currentrole = 0;
string Account::AdminCode = "000";
LinkedList<Account> Account::accountList;
bool Account::is_header_printed = false;
void Account::resetHeader() { is_header_printed = false; }

// Constructor
Account::Account() {}
Account::Account(const string& u, const string& p, const string& id, int role) : username(u), password(p), tenant_ID(id), role(role) {
    account_ID = generateID(++currentNumber);
}
Account::~Account() {}

string Account::generateID(int number) {
    stringstream ss;
    ss << "Account." << setw(3) << setfill('0') << number;
    return ss.str();
}

// Load function
void Account::load(const string& filename) {
    ifstream file(filename);    
    if (!file.is_open()) {
        cerr << "Khong the mo file: " << filename << endl;
        return;
    }   
    string line;
    if (getline(file, line)) {
        stringstream ss(line);
        string AdCode;
        getline(ss, AdCode, ':');  // Lấy "AdminCode"
        ss >> AdminCode;        
    }   
    file.close();
    accountList.load(filename); 
}
void Account::updateFile(const string& filename) { 
    ofstream file(filename);
    if (!file.is_open()) {
        cerr << "Khong the mo file: " << filename << endl;
        return;
    } 
    file << "accountID,username,password,tenantID,role,AdminCode:" << AdminCode << endl;
    file.close();
    accountList.updateFile(filename); 
}

// Get function
string Account::getusername() { return username; }
string Account::getpassword() { return password; }
string Account::gettenantID() { return tenant_ID; }
int Account::getrole() { return role; };

// Set function
void Account::setusername(string u) { this->username = u; }
void Account::setpassword(string p) { this->password = p; }
void Account::setAdminCode() {
    string temp;
    cout << "Nhap AdminCode cu: "; cin >> temp;
    if (temp == AdminCode) {
        cout << "Nhap AdminCode moi: "; cin >> AdminCode;
        cout << "AdminCode da thay doi thanh cong!" << endl;
        Account::updateFile("Data/Account.txt");
    }
    else {
        cout << "Khong dung AdminCode" << endl;
    }
}

// Convert function
void Account::fromString(const string& line) {
    string rolestr;
    stringstream ss(line);
    getline(ss, account_ID, ',');
    getline(ss, username, ',');
    getline(ss, password, ',');
    getline(ss, tenant_ID, ',');
    getline(ss, rolestr);
    role = stoi(rolestr); 
    total++;
}

string Account::toString() const {
    return account_ID + ',' + username + "," + password + "," + tenant_ID+ "," + (role == 0 ? "0" : "1") ;
}

// Basic function
bool Account::signup() {
    string u, p;
    int repeat = 0, role;
    do {
        cout << "Lua chon loai tai khoan (1 = Tenant, 2 = Admin): "; cin >> role;
        if (role != 1 && role != 2) {
            cout << "Lua chon khong hop le. Vui long chon 1 hoac 2.\n";
        }
    } while (role != 1 && role != 2);

    if (role == 2) { // admin thì nhập admin code
        string adminCodeInput;
        int attempts = 0;
        do {
            if (attempts > 0) {
                cout << "AdminCode khong dung, vui long bam enter de nhap lai hoac nhap 0 de thoat." << endl;
                cout << "Lua chon: ";
                cin.ignore();
                getline(cin, adminCodeInput);
                if (adminCodeInput == "0") { // nhập 0 thì thoát
                    cout << "Dang ky da bi huy." << endl;
                    return 0;
                }
            }
            cout << "Nhap day so AdminCode: "; cin >> adminCodeInput;
            attempts++;
        } while (adminCodeInput != Account::AdminCode); 
        cout << "AdminCode hop le. Dang ky tai khoan admin." << endl;
    }

    do { // đăng kí tài khoản
        if (repeat) { 
            cout << "Username nay da duoc su dung, vui long nhap lai hoac nhap 0 de thoat." << endl;
            string choice;
            cout << "Lua chon: ";
            cin.ignore(); getline(cin, choice);
            if (choice == "0") {
                cout << "Dang ky da bi huy." << endl;
                return 0;
            }
        }
        cout << "Nhap username: "; cin >> u;
        repeat = 1;
    } while (searchByUsername(u, 0) != NULL);
    cout << "Nhap password: "; cin >> p;

    if (role == 1) { // tenant
        cout << "Nhap thong tin ca nhan: " << endl;
        string lastName, firstName, phone, cccd;
        int birthyear;
        bool genderInput;
        cout << "Nhap ho va ten dem: ";
        cin.ignore(); getline(cin, lastName);
        cout << "Nhap ten: "; getline(cin, firstName);
        cout << "Nhap so dien thoai: "; cin >> phone;
        cout << "Nhap CCCD: "; cin >> cccd;
        cout << "Nhap nam sinh: "; cin >> birthyear;
        cout << "Nhap gioi tinh (0: Nam, 1: Nu): "; cin >> genderInput;

        Tenant tenant(lastName, firstName, phone, cccd, birthyear, genderInput);
        Tenant::tenantList.add(tenant);

        Account acc(u, p, tenant.getID(),0);
        accountList.add(acc);
        Tenant::updateFile("Data/Tenant.txt");
    } else {
        // Tạo tài khoản admin (không có tenant ID)
        Account acc(u, p, "Admin",1);
        accountList.add(acc);
    }

    cout << "Sign up successful!" << endl;
    total++;
    accountList.updateFile("Data/Account.txt");
    return 1;
}

bool Account::signin() {
    string u, p;
    LinkedList<Account>::Node* account;
    int attempts = 0;  
    do {
        if (attempts) { 
            cout << "Username hoac password khong dung.\n";
            cout << "1. Thu lai\n";
            cout << "2. Quen mat khau\n";
            cout << "0. Thoat\n";
            cout << "Lua chon: ";
            
            int choice;
            cin >> choice;
            
            if (choice == 0) {
                cout << "Dang nhap da bi huy." << endl;
                return false;
            } else if (choice == 2) {
                if (forgotPassword()) { // quay lại đăng nhập
                    attempts = 0;
                    continue;
                }
            }
        }
        cout << "Nhap username: "; cin >> u;
        cout << "Nhap password: "; cin >> p;
        account = searchByUsername(u, 0);       
        
        if (account != NULL && account->data.password == p) {
            currentTenantID = account->data.gettenantID();
            currentrole = account->data.getrole();
            cout << "Dang nhap thanh cong!" << endl;
            return true;
        }      
        account = NULL; 
        attempts++;

    } while (true);
}

// Search function
LinkedList<Account>::Node* Account::searchByUsername(string u, int check) {
    resetHeader();  
    if (check == 1) { cout << "Nhap username can tim kiem: "; cin >> u; }
    LinkedList<Account>::Node* current = accountList.begin(); 
    while (current != nullptr) {
        if (current->data.getusername() == u) {
            return current; 
        }
        current = current->next; 
    }
    return nullptr; 
}

void Account::showAllAccount() {
    resetHeader();  
    cout << "Danh sach Account:" << endl;
    accountList.show();
}

ostream& operator<<(ostream& os, const Account& a) {
    const int w_id = 15, w_user = 15, w_pass = 15, w_tenant = 15, w_role = 10;
    
    if (!Account::is_header_printed) {
        os << left << setw(w_id) << "AccountID" << " | "
           << setw(w_user) << "Username" << " | "
           << setw(w_pass) << "Password" << " | "
           << setw(w_tenant) << "TenantID" << " | "
           << setw(w_role) << "Role" << endl
           << string(w_id + w_user + w_pass + w_tenant + w_role + 13, '-') << endl;
        Account::is_header_printed = true;
    }
    
    os << left << setw(w_id) << a.account_ID << " | "
       << setw(w_user) << a.username << " | "
       << setw(w_pass) << a.password << " | "
       << setw(w_tenant) << a.tenant_ID << " | "
       << setw(w_role) << (a.role == 0 ? "Tenant" : "Admin") << endl;
    return os;
}

bool Account::forgotPassword() {
    string phone, cccd;
    cout << "\n=== KHOI PHUC MAT KHAU ===\n";
    cout << "Nhap so dien thoai: "; cin >> phone;
    cout << "Nhap CCCD: "; cin >> cccd;

    LinkedList<Account>::Node* account = verifyTenantInfo(phone, cccd);
    
    if (account != nullptr) {
        cout << "\nXac minh thanh cong!\n";
        cout << "Mat khau cua ban la: " << account->data.getpassword() << endl;
        return true;
    } else {
        cout << "\nThong tin xac minh khong chinh xac!\n";
        return false;
    }
}

LinkedList<Account>::Node* Account::verifyTenantInfo(const string& phone, const string& cccd) {
    LinkedList<Tenant>::Node* currentTenant = Tenant::tenantList.begin();
    while (currentTenant != nullptr) {
        if (currentTenant->data.getPhone() == phone && 
            currentTenant->data.getCCCD() == cccd) {
            string tenantID = currentTenant->data.getID();
            LinkedList<Account>::Node* currentAccount = accountList.begin();
            
            while (currentAccount != nullptr) {
                if (currentAccount->data.gettenantID() == tenantID) {
                    return currentAccount;
                }
                currentAccount = currentAccount->next;
            }
        }
        currentTenant = currentTenant->next;
    }
    return nullptr;
}

void Account::changePassword() {
    string oldPassword, newPassword;
    cout << "Enter old password: "; cin >> oldPassword;
    cout << "Enter new password: "; cin >> newPassword;
    LinkedList<Account>::Node* current = accountList.begin();
    while (current != nullptr) {
        if (current->data.gettenantID() == currentTenantID && current->data.getpassword() == oldPassword) {
            current->data.setpassword(newPassword);
            cout << "Password changed successfully!" << endl;
            return;
        }
        current = current->next;
    }
    cout << "Invalid old password!" << endl;
}