class PersonsManager {
    
    constructor(baseUrl) {
        this.baseUrl = baseUrl;
    }

    createPerson(name, age) {
        fetch(`${this.baseUrl}/persons/`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
            },
            body: JSON.stringify({ name, age }),
        })
        .then(response => response.json())
        .then(data => {
            console.log('Person created:', data);
            alert('Person created successfully!');
            this.fetchPersons(); // Refresh the list after creating a person
        })
        .catch((error) => {
            console.error('Error:', error);
        });
    }

    fetchPersons(skip = 0, limit = 100) {
        fetch(`${this.baseUrl}/persons/?skip=${skip}&limit=${limit}`)
        .then(response => response.json())
        .then(data => {
            const personsList = document.getElementById('persons-list');
            personsList.innerHTML = '<ul>' + data.map(person => `<li>${person.id} - ${person.name}, ${person.age} years old</li>`).join('') + '</ul>';
        })
        .catch((error) => {
            console.error('Error:', error);
        });
    }
}

// Initialize the PersonsManager with the API base URL
const personsManager = new PersonsManager('http://localhost:9999');

document.getElementById('create-person-form').addEventListener('submit', function(e) {
    e.preventDefault();
    const name = document.getElementById('name').value;
    const age = parseInt(document.getElementById('age').value, 10);
    personsManager.createPerson(name, age);
});

document.getElementById('fetch-persons').addEventListener('click', function() {
    personsManager.fetchPersons();
});