const API_BASE_URL = 'http://127.0.0.1:8080';

// A simple function to retrieve the token from local storage or wherever it is stored
function getAuthToken(): string | null {
	return localStorage.getItem('auth_token'); // Assuming the token is stored in localStorage
}

// A simple function to save the token
function setAuthToken(token: string): void {
	localStorage.setItem('auth_token', token);
}

// A simple function to save the token
function delAuthToken(): void {
	localStorage.removeItem('auth_token');
}

/**
 * Create a new form.
 * @param name The name of the form.
 * @param fields The fields of the form in JSON format.
 * @returns The ID of the created form.
 */
export async function createForm(name: string, fields: unknown): Promise<string> {
	const token = getAuthToken(); // Get the token from storage
	const response = await fetch(`${API_BASE_URL}/forms`, {
		method: 'POST',
		headers: {
			'Content-Type': 'application/json',
			Authorization: `Bearer ${token}` // Add token to the headers
		},
		body: JSON.stringify({ name, fields })
	});

	if (!response.ok) {
		throw new Error(`Error creating form: ${response.statusText}`);
	}

	return await response.json();
}

/**
 * Get all forms.
 * @returns An array of forms.
 */
export async function getForms(): Promise<unknown[]> {
	const token = getAuthToken(); // Get the token from storage
	const response = await fetch(`${API_BASE_URL}/forms`, {
		method: 'GET',
		headers: {
			Accept: 'application/json',
			Authorization: `Bearer ${token}` // Add token to the headers
		}
	});

	if (!response.ok) {
		throw new Error(`Error fetching forms: ${response.statusText}`);
	}

	return await response.json();
}

/**
 * Submit a form.
 * @param formId The ID of the form to submit.
 * @param data The submission data in JSON format.
 * @returns The ID of the created submission.
 */
export async function submitForm(formId: string, data: unknown): Promise<string> {
	const token = getAuthToken(); // Get the token from storage
	const response = await fetch(`${API_BASE_URL}/forms/${formId}/submissions`, {
		method: 'POST',
		headers: {
			'Content-Type': 'application/json',
			Authorization: `Bearer ${token}` // Add token to the headers
		},
		body: JSON.stringify(data)
	});

	if (!response.ok) {
		throw new Error(`Error submitting form: ${response.statusText}`);
	}

	return await response.json();
}

/**
 * Get all submissions for a specific form.
 * @param formId The ID of the form.
 * @returns An array of submissions for the form.
 */
export async function getSubmissions(formId: string): Promise<unknown[]> {
	const token = getAuthToken(); // Get the token from storage
	const response = await fetch(`${API_BASE_URL}/forms/${formId}/submissions`, {
		method: 'GET',
		headers: {
			Accept: 'application/json',
			Authorization: `Bearer ${token}` // Add token to the headers
		}
	});

	if (!response.ok) {
		throw new Error(`Error fetching submissions: ${response.statusText}`);
	}

	return await response.json();
}

/**
 * Login and get the authentication token.
 * @param username The username.
 * @param password The password.
 * @returns The authentication token.
 */
export async function login(username: string, password: string): Promise<void> {
	const response = await fetch(`${API_BASE_URL}/login`, {
		method: 'POST',
		headers: {
			'Content-Type': 'application/json'
		},
		body: JSON.stringify({ username, password })
	});

	if (!response.ok) {
		throw new Error(`Error logging in: ${response.statusText}`);
	}

	const { token } = await response.json();
	setAuthToken(token); // Store the token in localStorage
}

export function logout() {
	delAuthToken();
}

export function loggedIn() {
	return localStorage.getItem('auth_token') !== null;
}